Abdel Wahab M. Mahmoud

Abdel Wahab M. Mahmoud

Cairo University

H-index: 17

Africa-Egypt

Abdel Wahab M. Mahmoud Information

University

Cairo University

Position

Faculty of Agriculture-

Citations(all)

1394

Citations(since 2020)

922

Cited By

640

hIndex(all)

17

hIndex(since 2020)

16

i10Index(all)

24

i10Index(since 2020)

21

Email

University Profile Page

Cairo University

Abdel Wahab M. Mahmoud Skills & Research Interests

Plant eco-physiology and nanoparticles

Top articles of Abdel Wahab M. Mahmoud

Correction: Mahmoud et al. Application of Silicon, Zinc, and Zeolite Nanoparticles—A Tool to Enhance Drought Stress Tolerance in Coriander Plants for Better Growth Performance …

Background:Open Access CorrectionCorrection: Mahmoud et al. Application of Silicon, Zinc, and Zeolite Nanoparticles—A Tool to Enhance Drought Stress Tolerance in Coriander Plants for Better Growth Performance and Productivity. Plants 2023, 12, 2838

Authors

Abdel Wahab M Mahmoud,Hassan M Rashad,Sanaa EA Esmail,Hameed Alsamadany,Emad A Abdeldaym

Journal

Plants

Published Date

2024/2/4

Improvement of potato (Solanum tuberosum L.) micro-tubers formation as effected by nano-particles in-vitro

BackgroundApplying nano-fertilizers in the agricultural sector may lead to sustainable development through lower inputs and waste generation, diminishing nutrient losses, and increasing nutrient use efficiency by releasing nutrients at a suitable rate for plant demand compared with conventional chemical fertilizers.ObjectiveThe current study’s objective was to develop the ideal procedure for the in vitro creation of virus-free micro-tubers of two potato cultivars using varied doses of phosphorus and potassium nanoparticles (K-NPs) added to the Murashige and Skoog (MS) medium.Materials and methodsThe research was conducted at the Tissue Culture Laboratory, Vegetable Crops Department, Faculty of Agriculture, Cairo University, Egypt, from January 2020 to July 2021. The meristem tips of two potato cultivars were excised and cultured in solid MS medium supplemented with sucrose and agar. The multiplication …

Authors

Amal M Farrag,Sahar S Taha,Omaima S Darwish,Shaaban Ashour,Abdel Wahab M Mahmoud

Journal

Egyptian Pharmaceutical Journal

Published Date

2024

Co-application of salicylic acid and spermine alleviates salt stress toxicity in wheat: Growth, nutrient acquisition, osmolytes accumulation, and antioxidant response

Salicylic acid (SA) and spermine (SPM) elicit particular responses in response to various environmental stressors. However, there is little known about the underlying mechanism of their combination treatments' mediating effect on salt stress tolerance. In this investigation, the potential impact of 100 mg L−1 SA and/or 30 mg L−1 SPM in avoiding salt damage at saline environments of 6.0 and 12.0 dS m–1 in wheat was examined. Results showed that by increasing mineral acquisition, chlorophyll a and b contents, antioxidant enzymes activity, osmolytes accumulation, leaf water content, grains carbohydrate and protein content as well as reducing Na+ accumulation, membrane electrolyte leakage, malondialdehyde and hydrogen peroxide contents, exogenously applied SA and/or SPM significantly reduced the detrimental impacts of soil salinization and increased wheat growth and productivity. The best outcomes …

Authors

Neveen B Talaat,Abdel Wahab M Mahmoud,Alaa MA Hanafy

Journal

Acta Physiologiae Plantarum

Published Date

2023/1

Evaluation of nano-nitrogen fertilizers and other nitrogen sources on the performance of Guinea grass plants grown in newly reclaimed soil under water deficiency

Water deficiency and chemical fertilizers' pollution are two of many factors causing imbalance in the ecosystem rhythm, which reflects on farm livestock quality and quantity, particularly in arid and semi-arid regions. Limited research is available on the use of different sources of nitrogen fertilizers on pasture crops; hence, an open field research experiment was carried out in newly reclaimed soil to investigate the effect of different sources of nitrogen fertilizers on maximizing protein level and production of Guinea grass (Panicum maximum Jacq.) plant under water deficiency. Present data from two successive seasons revealed that: plants received nitrogen in the form of nano particles recorded significant increases in yield, morphological parameters, leaf anatomy, and chemical composition (macro and micro nutrients, total carbohydrates, plant pigments and crude protein) over control (plants that received the …

Authors

Hassan M Rashad,Abdel Wahab M Mahmoud,Hameed Alsamadany,Yahya Alzahrani,Engy Alaa Seleem,Hend Mohammad Saad Ibrahim

Journal

Plant Stress

Published Date

2023/12/1

Application of silicon, zinc, and zeolite nanoparticles—A tool to enhance drought stress tolerance in coriander plants for better growth performance and productivity

Drought stress in arid regions is a serious factor affecting yield quantity and quality of economic crops. Under drought conditions, the application of nano-elements and nano-agents of water retention improved the water use efficiency, growth performance, and yield quantity of drought-stressed plants. For this objective, two field experiments were performed and organized as randomized complete block designs with six replications. The treatments included kaolin (5 t. ha−1) bentonite (12.5 t. ha−1), perlite (1.25 t.ha−1), N-zeolite (1.3 L.ha−1), N-silicon (2.5 L.ha−1), and N-zinc (2.5 L.ha−1). The current study showed that the application of silicon, zinc, and zeolite nanoparticles only positively influenced the morphological, physiological, and biochemical properties of the drought-stressed coriander plant. Exogenous application of N-silicon, N-zinc, and N-zeolite recorded the higher growth parameters of drought-stressed plants; namely, plant fresh weight, plant dry weight, leaf area, and root length than all the other treatments in both seasons. The improvement ratio, on average for both seasons, reached 17.93, 17.93, and 18.85% for plant fresh weight, 73.46, 73.46, and 75.81% for plant dry weight, 3.65, 3.65, and 3.87% for leaf area, and 17.46, 17.46, and 17.16% for root length of drought-stressed plants treated with N-silicon, N-zinc, and N-zeolite, respectively. For physiological responses, the application of N-zeolite, N-silicon, and N-zinc significantly increased leaf chlorophyll content, photosynthetic rate, water use efficiency, chlorophyll fluorescence, and photosystem II efficiency compared with the control in both seasons, respectively. Similar results …

Authors

Abdel Wahab M Mahmoud,Hassan M Rashad,Sanaa EA Esmail,Hameed Alsamadany,Emad A Abdeldaym

Journal

Plants

Published Date

2023/7/31

Efficiency of different potassium sources, and soil bio-fertilizers for growth, productivity, and biochemical constituents of Narcissus (Narcissus tazetta L.)

An experimental field was carried out to study the effect of soil bio-fertilizers (biochar and vermicompost) and foliar application of some potassium sources (K-nano, K-nitrate, K-sulfate, K-chloride, K-humate, and K-silicate) on the growth, flowering, bulbs production, leaf minerals content, and some bulb active ingredients of Narcissus tazetta L. cv. cheerfulness bulbs, during two successive seasons (2019–2020 and 2020–2021). The results showed that foliar application of different potassium sources and soil treated by bio-fertilizers significantly affected growth, flowering, and bulb production compared to control. The highest values of vegetative growth, flowers, and bulbs quality (plants height, large leaves, leaves number/ plant, leaves fresh and dry weights, vase life, bulbs yield, and root length), as well as total chlorophylls, carbohydrates content of leaves, and mineral content of bulbs were obtained when plants …

Authors

Asmaa B El-Attar,Eman Z Othman,Reham M El-Bahbohy,Abdel Wahab M Mahmoud

Journal

Journal of Plant Nutrition

Published Date

2023/6/15

Exogenous Appliance of Nano-Zeolite and Nano-Silicon Elevate Solidago canadensis Invasive Plant Tolerance to Water Deficiency

Plant production, soil quality, and a sustainable environment depend on climate change. Drought is a multidimensional stressor that seriously affects plant production. The most sensitive plant to climate change is the invasive goldenrod (Solidago canadensis L.), which has potentially high-value materials that can be used to develop a novel approach to controlling its spread. This study aimed to evaluate the impact of different applications (NPK-chemical fertilizers (T1) as control, nano-silicon (T2), nano-NPK (T3), nano-zeolite-loaded nitrogen (T4), and mixed nano-silicon with nano-zeolite-loaded nitrogen (T5)) on plant growth, flowering, chemical composition, yield, essential oil (EO) productivity, and tolerance of water deficit under newreclaimed soil. The results show that T5 application enhanced morphological traits and photosynthetic parameters (photosynthetic rate, CO2 concentration, and water use efficiency while reducing transpiration rate) in goldenrod plants. Moreover, it promoted the plant nutrients uptake compared to the control. The highest total carbohydrate, flavonoid, and phenol contents, as well as a significant amount of the phytohormone indole-3-acetic acid (IAA), were obtained from the T5 application. Conversely, abscisic acid (ABA) and antioxidant enzymes of catalase (CAT) and superoxide dismutase (SOD) appeared with the highest amounts in control plants (T1).Th interaction effect of T5 and drought stress is indicated by increased EO productivity and therapeutic properties.Previous results provide a way to elevate drought stress resistance for the safety production of S. canadensis and improve their qualitative and …

Authors

Eman Z Othman,Asmaa B El-Attar,Reham M El-Bahbohy,Sarah N Abd El-Khalek,Sherif H Morgan,Abdel Wahab M Mahmoud

Journal

Horticulturae

Published Date

2023/1/28

Natural extracts elevated drought resistance in Iris tingitana plant.

A study was carried out for two seasons (2020/21 and 2021/22) to examine the effects of various natural extracts individually or in combination on the drought resistance of Iris tingitana cv. Wedgewood. A mixture of sand and clay (1: 1 v/v) was prepared as a growth media. The treatments were (0, 25, and 50% water drought) with liquid active biostimulants (garlic and seaweed) five times intervals after two weeks from bulb germination. The results revealed that plants at different soil moisture with various biostimulants succeeded in producing flowers of the best quality. Water drought at 25% also increased chlorophyll (a & b) and carotenoids in leaves, while drought at 0% recorded the highest increase in gibberellic acid (GA3). At 25%, vegetative growth and flower parameters were at their highest levels (GA3). Moreover, water drought at 50% increased abscisic acid (ABA), proline, and catalase. Additionally, increases in vegetative growth, the number of leaves, flower parameters, chlorophyll (a & b), and carotenoids in leaves were noted as a result of applying seaweed extract at a concentration of 10 mL L-1; however, the best results for gibberellic acid were obtained using the highest concentration of garlic extract (500 mL L-1). The interactions between treatments indicated the superiority of growing bulbs at 25% water drought with applying seaweed extracted at 10 mL L-1 that improved vegetative growth and most of the flower parameters. Meanwhile, treating plants at 25% water drought with either seaweed at 5 mL L-1 or garlic extract at 500 mL L-1 realized the highest chlorophyll (a & b), carotenoids, and gibberellic acid.

Authors

Deyaa I Atwa,Amira SH Soliman,M Hassan,Abdel-Wahab M Mahmoud

Journal

Journal of Applied Horticulture

Published Date

2023/1/1

The effective role of nano-silicon application in improving the productivity and quality of grafted tomato grown under salinity stress

This study aims to determine the influence of grafting and nano-silicon fertilizer on the growth and production of tomatoes (Solanumlycopersicum L.) under salinity conditions. A commercial tomato hybrid (cv. Strain B) was used as a scion and two tomato phenotypes were used as rootstocks: S. pimpinellifolium and Edkawy. The rootstock effect was evaluated by growing plants at two NaCl concentrations plus the control (0, 4000, and 8000 ppm NaCl). Nano-silicon foliar application (0.5 ppm) after 20, 28, and 36 days from transplanting was also used to mitigate salinity stress. Antioxidants, hormones, and proline were evaluated for a better understanding of the physiological changes induced by salinity and grafting. The results showed that grafting either on S. pimpinellifolium or Edkawy combined with nano-silicon application enhanced shoot and root growth, fruit yield, and fruit quality. The Edkawy rootstock was more effective than the S. pimpinellifolium rootstock in terms of counteracting the negative effect of salinity. Higher levels of mineral contents, GA3, ABA, and proline were detected in shoots that were subjected to grafting and nano-silicon application compared to the control treatment. This study indicates that grafting and nano-silicon application hold potential as alternative techniques to mitigate salt stress in commercial tomato cultivars.

Authors

Eman G Sayed,Abdel Wahab M Mahmoud,Mohamed M El-Mogy,Mahmoud AA Ali,Mahmoud AM Fahmy,Ghada A Tawfic

Journal

Horticulturae

Published Date

2022/3/30

Performance of some spherical eggplant hybrids under plastic house and open field conditions

Two experiments were conducted during the two winter seasons of 2018/2019 and 2019/2020 at the Agricultural Experimental Station of Faculty of Agriculture Cairo University Giza to investigate the response of four spherical F1 cultivars (Sawad El Laiel, Petra, Amedo and Black Berry) of eggplant (Solanum melongena L.) under two different production systems (open field and plastic house), consider the vegetative growth, fruit quality and yield. Plants grown in open field had higher values of number of branches, early and total yield, fruit weight, fruit diameter, fruit total carbohydrate, vitamin C, macro and micro elements and significant increase in leaf dry matter, leaf concentrations of macro and microelements compared with plastic house production. Reversely, planting in plastic house significantly increased plant height, leaf area and fruit dry matter compared with planting in open field.  The period from transplanting to first harvest was shorter in plants grown in open field than those grown in plastic house. Meanwhile, there were no significant differences between production systems in leaf chlorophyll, fruit length, fruit contents of TSS, Ca, Mg, niacin and omega3 in both seasons. The analysis showed significant differences among the different eggplant cultivars for all traits. Sawad El Laiel' recorded the highest value of early and total yield, average fruit weight, total carbohydrate, TSS and leaf concentrations of K, Ca and B. On the other hand, ‘Amedo' significantly exceeded all other cultivars in chlorophyll reading and leaf concentrations of N, P, Mg, Fe, Mn and Zn as well as fruit diameter, fruit concentrations of N, P, K, Ca, Mg, Fe, Mn, Zn, vitamin C …

Authors

Shereen SF EL-Sayed,Abdel Wahab M Mahmoud

Journal

Scientific Journal of Agricultural Sciences

Published Date

2022/12/1

Nano-insecticides against the black cutworm Agrotis ipsilon (Lepidoptera: Noctuidae): Toxicity, development, enzyme activity, and DNA mutagenicity

Frequent applications of synthetic insecticides might cause environmental pollution due to the high residue. In addition, increasing insecticide resistance in many insect pests requires novel pest control methods. Nanotechnology could be a promising field of modern agriculture, and is receiving considerable attention in the development of novel nano-agrochemicals, such as nanoinsectticides and nanofertilizers. This study assessed the effects of the lethal and sublethal concentrations of chlorantraniliprole, thiocyclam, and their nano-forms on the development, reproductive activity, oxidative stress enzyme activity, and DNA changes in the black cutworm, Agrotis ipsilon, at the molecular level. The results revealed that A. ipsilon larvae were more susceptible to the nano-forms than the regular forms of both nano chlorine and sulfur within the chlorantraniliprole and thiocyclam insecticides, respectively, with higher toxicities than the regular forms (ca. 3.86, and ca.2.06-fold, respectively). Significant differences in biological parameters, including developmental time and reproductive activity (fecundity and hatchability percent) were also observed. Correspondingly, increases in oxidative stress enzyme activities were observed, as were mutagenic effects on the genomic DNA of A. ipsilon after application of the LC50 of the nano-forms of both insecticides compared to the control. These promising results could represent a crucial step toward developing efficient nanoinsecticides for sustainable control of A. ipsilon.

Authors

Mona Awad,El-Desoky S Ibrahim,Engy I Osman,Wael H Elmenofy,Abdel Wahab M Mahmoud,Mohamed AM Atia,Moataz AM Moustafa

Journal

PLoS One

Published Date

2022/2/3

Rootstock Priming with Shikimic Acid and Streptomyces griseus for Growth, Productivity, Physio-Biochemical, and Anatomical Characterisation of Tomato Grown …

With this research, we aimed to determine the impact of grafting and rootstock seed treated with Streptomyces griseus (MT210913) (S. griseus) or shikimic acid (SA) at a 60 ppm concentration on tomato (Solanum lycopersicum L.) production grown under low-temperature conditions. Two open-field trials were performed during both winter seasons of 2020 and 2021 at the Experimental Farm, Faculty of Agriculture, Cairo University, Giza, Egypt. A tomato cultivar (Peto 86) was used as a scion and two tomato phenotypes were employed as rootstocks (Solanum cheesmaniae L. (line LA 524) and GS hybrid), as well as self-grafted as a control. Effects of sub-optimal temperature on vegetative growth, yield, and fruit quality were tested. The results indicate that, under cold stress, rootstock seed priming, especially with S. griseus, enhanced plant growth, total yield, and fruit quality properties. GS hybrid rootstock was more effective than that of S. cheesmaniae rootstock in terms of mitigating the negative effect of cold stress. GS hybrid, inoculated with S. griseus, increased the total yield per plant by 10.5% and 5.7% in the first and second seasons, respectively. Higher levels of GA3 and mineral content were noticed in leaves that were grafted and treated with S. griseus compared to the control treatment. Additionally, the great enhancing effects of all anatomical features of tomato plants were recorded with GS hybrid rootstock, inoculated by S. griseus. These results prove that grafting on GS hybrid rootstock treated with S. griseus is a potential choice to alleviate the cold stress of commercial tomato varieties.

Authors

Eman G Sayed,Abdel Wahab M Mahmoud,Ahmed Abdel-Wahab,Reham M El-Bahbohy,Samah N Azoz

Journal

Plants

Published Date

2022/10/24

Nanopotassium, nanosilicon, and biochar applications improve potato salt tolerance by modulating photosynthesis, water status, and biochemical constituents

Salinity is one of the main environmental stresses, and it affects potato growth and productivity in arid and semiarid regions by disturbing physiological process, such as the photosynthesis rate, the absorption of essential nutrients and water, plant hormonal functions, and vital metabolic pathways. Few studies are available on the application of combined nanomaterials to mitigate salinity stress on potato plants (Solanum tuberosum L. cv. Diamont). In order to assess the effects of the sole or combined application of silicon (Si) and potassium (K) nanoparticles and biochar (Bc) on the agro-physiological properties and biochemical constituents of potato plants grown in saline soil, two open-field experiments were executed on a randomized complete block design (RCBD), with five replicates. The results show that the biochar application and nanoelements (n-K and n-Si) significantly improved the plant heights, the fresh and dry plant biomasses, the numbers of stems/plant, the leaf relative water content, the leaf chlorophyll content, the photosynthetic rate (Pn), the leaf stomatal conductance (Gc), and the tuber yields, compared to the untreated potato plants (CT). Moreover, the nanoelements and biochar improved the content of the endogenous elements of the plant tissues (N, P, K, Mg, Fe, Mn, and B), the leaf proline, and the leaf gibberellic acid (GA3), in addition to reducing the leaf abscisic acid content (ABA), the activity of catalase (CAT), and the peroxidase (POD) and polyphenol oxidase (PPO) in the leaves of salt-stressed potato plants. The combined treatment achieved maximum plant growth parameters, physiological parameters, and nutrient …

Authors

Abdel Wahab M Mahmoud,Mahmoud M Samy,Hoda Sany,Rasha R Eid,Hassan M Rashad,Emad A Abdeldaym

Journal

Sustainability

Published Date

2022/1/10

Effect of exogenous postharvest application with thyme and cinnamon oils on quality and storability of cherry tomato

Cherry tomato are classified as perishable fruits that deteriorate vastly after harvest. The use of natural and eco-friendly products, such as essential oils, for preserving the quality of fresh fruits and vegetables is highly demands for the consumers. Thus, the aim of this study was to evaluate the efficiency of exogenous postharvest application with thyme oil (1%), cinnamon oil (1%), and their combination on quality and shelf-life of cherry tomato stored for 28 days at 10 C and 90% RH. The results indicated that both essential oils were able to preserve the quality of cherry tomato by reducing weight loss, decay, appearance, and firmness. Additionally, essential oils application conserved total soluble solids, total carbohydrates, and total phenolic compounds. Lycopene and carotene contents were decreased by essential oils application. In conclusion, the application of both essential oils could be effective in maintain the quality and increase the shelf-life of cherry tomato during refrigerated storage.

Authors

Sayed F El-Sayed,Amal S Atress,Abdel Wahab M Mahmoud,Moshera IF Maghraby,Mohamed M El-Mogy

Journal

International Journal of Health Sciences

Published Date

2022

Foliar application of different iron sources improves morpho-physiological traits and nutritional quality of broad bean grown in sandy soil

Nano-fertilizers are a new tool that can be used to address plant production challenges, and it addresses such nutrient deficiencies through smart agriculture approaches. Iron (Fe) is a vital element for several metabolic and physiological processes; however, Fe deficiency is common in poorly fertile soils (sand soil) and in arid areas. Therefore, additional research is required to select the most efficient form of iron absorbance. This research was implemented on broad bean plants (Vicia faba L. var. major Harz) to examine the impact of three iron sources: nano-iron (FeNPs, T1), iron sulfate (T2), and chelated iron (T3) as a foliar spray on the morphological properties, physiological attributes, and nutritional status of these plants compared to the untreated plants (control). The obtained results showed that foliar spraying with FeNPs, chelated iron and sulphate iron fertilizers increased plant height by 35.01%, 26.2, and 20.4%; leaf area by 38.8%, 18.3%, and 8.1%; the fresh weight of the plant by 47%, 32.8%, and 7.3%; the dry weight of the plant by 52.9%, 37.3%, and 11.2%; and the number of branches by 47%, 31.3%, and 25.6 %, respectively, compared to the control treatment (CT). Furthermore, the application of FeNPs, chelated iron, and sulphate iron fertilizers improved the number of pods by 47.9%, 24.8%, and 6.1%; the number of seeds by 32.8%, 7.9%, and 2.8%; and seed weight by 20.8%, 9.1%, and 5.4%, compared to control treatment (CT). Additionally, foliar application of FeNPs showed the highest values of photosynthesis rate (Pn), water-use efficiency (WUE), total chlorophyll, and phytohormones (IAA, GA3) compared to all the other …

Authors

Abdel Wahab M Mahmoud,Amira A Ayad,Hend SM Abdel-Aziz,Leonard L Williams,Rasha M El-Shazoly,Ahmed Abdel-Wahab,Emad A Abdeldaym

Journal

Plants

Published Date

2022/10/2

Prevalence of prediabetes and its associated risk factors among a sample of employees at faculty of medicine

Introduction Prediabetes is a state of pathological changes that precede diabetes; so early screening and interventions are both cost-saving and feasible to prevent disease progression and complications. Aim of Work To measure the prevalence of prediabetes among a sample of employees at Faculty of Medicine Ain Shams University (ASU), to identify different risk factors associated with prediabetes and to assess risk of having prediabetes. Materials and Methods A cross-sectional study was conducted among a convenience sample of 352 employees at Faculty of Medicine, ASU using selfadministered questionnaire. Physical activity assessment by International Physical Activity Questionnaire Short Form (IPAQ-SF), Diet Assessment by Mediterranean Diet Assessment Score (MEDAS), anthropometric measurements, and The American Diabetes Association - Centers for Disease Control and Prevention (ADA- CDC) prediabetes Risk Score. Measurements of glycosylated hemoglobin (HbA1c) were done to employees who were identified as high-risk individuals based on the prediabetes risk score. Results The prevalence of prediabetes was 36.1% by ADA-CDC Prediabetes Risk score and 65.4% of high-risk participants were confirmed to be prediabetic by HbA1c. By Multiple logistic regression analysis, age (OR=1.24, CI=1.18-1.29), gender (OR=5.67, CI=2.36-13.67), positive family history of Diabetes Mellitus (DM) (OR=15.16, CI=6.10-37.67), and having hypertension (OR=8.17, CI=3.29-20.27) affect the occurrence of prediabetes by ADA-CDC prediabetes risk score among studied  sample. Being ≥ 40 years old, male, hypertensive and had …

Authors

A Hassan,A Mokhtar,M Samy,A Mahmoud,S Mohammed

Journal

Egypt J Occup Med

Published Date

2022

Prospective practice for compound stress tolerance in thyme plants using nanoparticles and biochar for photosynthesis and biochemical ingredient stability

Global climatic change leads to many detrimental effects on all life forms. Outstanding case, salinity, and drought are considered multidimensional stress that severely affect plant growth and sustainable agriculture. Thymus vulgaris is a medicinal plant that has phytochemical constituents, and it is threatened by several abiotic stresses caused by climate change. Therefore, the present study aims to evaluate the physiological response and thyme tolerance grown on a newlyreclaimed saline sandy soil under drought conditions and treated by biochar-loaded biofertilizers, nano-zeolite, and nano-silicon through two consecutive seasons. The nanoparticles enhanced plant growth and alleviated the adverse effect of drought. Additionally, a synergistic effect was noticed when combining nanoparticles and biofertilizers. The quadruple combined treatment of nano-zeolite, nano-silicon, biochar, and organic matter (T7) significantly increased thyme morphological traits, photosynthetic parameters, oil, and yield compared to control treatment. Additionally, T7 increased the concentration of endogenous nutrients (N, P, K, Na, Ca, Mg, Zn, Fe, Mn), proline, total phenols, and total flavonoids, in addition to indoleacetic acid, gibberellic acid, and antioxidant enzymes in thyme compared to other treatments. T7 showed the lowest concentration of soluble sugars, abscisic acid, and transpiration rate. Interestingly, T7 increased the medicinal benefits of thyme by increasing its vital hydrocarbons, and oxygenated compounds. These findings introduce a dual benefit of nano-fertilizers in combination with biochar and organic matter in ameliorating soil salinity and drought …

Authors

Abdel Wahab M Mahmoud,Sanaa EA Esmail,Asmaa B El-Attar,Eman Z Othman,Reham M El-Bahbohy

Journal

Agronomy

Published Date

2022/4/28

Biochar Applications Improve Potato Salt Tolerance by Modulating Photosynthesis, Water Status, and Biochemical Constituents. Sustainability 2022, 14, 723

Salinity is one of the main environmental stresses, and it affects potato growth and productivity in arid and semiarid regions by disturbing physiological process, such as the photosynthesis rate, the absorption of essential nutrients and water, plant hormonal functions, and vital metabolic pathways. Few studies are available on the application of combined nanomaterials to mitigate salinity stress on potato plants (Solanum tuberosum L. cv. Diamont). In order to assess the effects of the sole or combined application of silicon (Si) and potassium (K) nanoparticles and biochar (Bc) on the agro-physiological properties and biochemical constituents of potato plants grown in saline soil, two open-field experiments were executed on a randomized complete block design (RCBD), with five replicates. The results show that the biochar application and nanoelements (nK and n-Si) significantly improved the plant heights, the fresh and dry plant biomasses, the numbers of stems/plant, the leaf relative water content, the leaf chlorophyll content, the photosynthetic rate (Pn), the leaf stomatal conductance (Gc), and the tuber yields, compared to the untreated potato plants (CT). Moreover, the nanoelements and biochar improved the content of the endogenous elements of the plant tissues (N, P, K, Mg, Fe, Mn, and B), the leaf proline, and the leaf gibberellic acid (GA3), in addition to reducing the leaf abscisic acid content (ABA), the activity of catalase (CAT), and the peroxidase (POD) and polyphenol oxidase (PPO) in the leaves of salt-stressed potato plants. The combined treatment achieved maximum plant growth parameters, physiological parameters, and nutrient …

Authors

AWM Mahmoud,MM Samy,H Sany,RR Eid,HM Rashad,EA Abdeldaym,Nanosilicon Nanopotassium

Published Date

2022

Optical Coherence Tomography and Optical Coherence Tomography Angiography Findings in Amblyopic Patients

Background: In people with multiple sclerosis (MS), optic neuritis (ON) results in inner retinal layer thinning, and reduced density of the retinal microvasculature. Objective: To compare inter-eye differences (IEDs) in macular optical coherence tomography (OCT) and OCT angiography (OCTA) measures in MS patients with a history of unilateral ON (MS ON) vs. MS patients with no history of ON (MS non-ON), and to assess how these measures correlate with visual function outcomes after ON. Methods: In this cross-sectional study, people with MS underwent OCT and OCTA. Superficial vascular plexus (SVP) density of each eye was quantified using a deep neural network. IEDs were calculated with respect to the ON eye in MS ON patients, and with respect to the right eye in MS non-ON patients. Statistical analyses used mixed-effect regression models accounting for intra-subject correlations. Results: We included 43 MS ON patients (with 92 discrete OCT/OCTA visits) and 14 MS non-ON patients (with 24 OCT/OCTA visits). Across the cohorts, mean IED in SVP density was −2.69% (SD 3.23) in MS ON patients, as compared to 0.17% (SD 2.39) in MS non-ON patients (p = 0.002). When the MS ON patients were further stratified according to time from ON and compared to MS non-ON patients with multiple cross-sectional analyses, we identified that IED in SVP density was significantly increased in MS ON patients at 1–3 years (p = < 0.001) and >3 years post-ON (p < 0.001), but not at <3 months (p = 0.21) or 3–12 months post-ON (p = 0.07), while IED in ganglion cell + inner plexiform layer (GCIPL) thickness was significantly increased in MS ON patients …

Authors

Olwen C Murphy,Grigorios Kalaitzidis,Eleni Vasileiou,Angeliki G Filippatou,Jeffrey Lambe,Henrik Ehrhardt,Nicole Pellegrini,Elias S Sotirchos,Nicholas J Luciano,Yihao Liu,Kathryn C Fitzgerald,Jerry L Prince,Peter A Calabresi,Shiv Saidha

Journal

Frontiers in Neurology

Published Date

2020/12/15

Are Copper Nanoparticles Toxic to All Plants? A Case Study on Onion (Allium cepa L.)

Sandy soils with high alkalinity are characterized by low copper (Cu) contents that lead to many deficiency symptoms in plants. Cu deficiency in plants can be corrected using several cheap Cu sources. Nevertheless, the effects that novel sources, such as Cu nanoparticles (NPs), have on plants remain poorly studied. In the present work, we investigated the effect and efficiency of Cu supplementation to onion (Allium cepa L.) plants using Cu sulfate, chelate, or NPs, and compared their effects on bulb quality, yield, and contents of phytochemicals. Two successive seasons (2018/2019 and 2019/2020) of field experiments were conducted in newly reclaimed sandy soils, where plants were sprayed with either 10 ppm CuO NPs, 20 ppm CuSO4·5H2O, or 20 ppm of Cu chelates. Overall, Cu deficiency (control) resulted in a significant decrease in yield and all quality traits of onion plants. CuO NPs treatment significantly enhanced growth parameters, including plant height, number of leaves, fresh and dry weight, yield, and bulb quality, compared with Cu sulfate and chelates. This was also the case regarding chemical constituents such as macro- and micro-nutrients, total soluble solids, phytochemical compounds, vitamins, and amino acids. Although Cu sulfate is the cheapest form used for Cu supplementation, results of the present study suggest that CuO NPs was not only safe to use, but also was the treatment that led to the highest onion yield and quality.

Authors

Shady Abdel Mottaleb,Ahmed ZA Hassan,Reham El-Bahbohy,Abdel Wahab M Mahmoud

Journal

Agronomy

Published Date

2021/5/19

The role of nano-silicon and other soil conditioners in improving physiology and yield of drought stressed barley crop

Abdel Wahab M. Mahmoud (* Corresponding author), shady Abdel Mottaleb, Plant Physiology division, botany department, Faculty of Agriculture, Cairo university, Giza, 12613, egypt. e-mail: Mohamed. mahmoud@ agr. cu. edu. eg hassan AZA, soil, Water & environment Institute, Agriculture Research Center, Giza, egypt Mohamed M. Rowezak, biology department, College of science, Juof university, kingdom of saudi Arabia Azza M. salama, Plant taxonomy division, Agricultural botany department, Faculty of Agriculture, Cairo university, Giza, 12613, egypt

Authors

Abdel Wahab M Mahmoud,AZA Hassan,Shady Abdel Mottaleb,Mohamed M Rowezak,Azza M Salama

Journal

Agriculture (Pol'nohospodárstvo)

Published Date

2021/10/1

Comparison between commercial and nano NPK in presence of nano zeolite on sage plant yield and its components under water stress

Abdel Wahab M. Mahmoud (* Corresponding author), Plant Botany Department, Plant Physiology Division, Faculty of Agriculture, Cairo University, El-Gama St. 9, 12613 Giza, Egypt. E-mail: mohamedabdelwahab@ cu. edu. eg Hend M. Swaefy, Department of Ornamental Horticulture Faculty of Agriculture, Cairo University, El-Gama St. 9, 12613 Giza, Egypt.

Authors

Abdel Wahab M Mahmoud,Hend M Swaefy

Journal

Agriculture (Pol'nohospodarstvo)

Published Date

2020/4/1

Rice husk derived biochar as smart material loading nano nutrients and microorganisms.

Hassan, AZA, Mahmoud, AWM, Turky, GM & Safwat, G.(2020). Rice husk derived biochar as smart material loading nano nutrients and microorganisms. Bulg. J. Agric. Sci., 26 (2), 309–322Present exploration aspired to produce biochar from rice husk basic nano particles using slow pyrolysis technique. The physio-chemical characteristics, phases and surface morphology of biochar were studied by different visual techniques. The obtained result confirmed that rice husk derive biochar is considered as a novel carrier of nano nutrients and advantageous microorganisms. The recorded values of mean radius, nearest distance between particles, perimeter of particles, the surface area of biochar basic nano particles, cation and anion exchange capacity were examined. The image of surface topography showed that biochar enrich by nano-particles with “sponge” shaped structures and nano-particles were imbedded into macro, meso, and micro pores of biochar. The spacemen atoms of pure elements composition of biochar followed the descending order of oxygen> silicon> sodium> potassium> carbon> magnesium> calcium> alumina. The stability and fertility of biochar basic nano particles might be used as safety soil amendment, climate changes mitigation, source of fertilizer and eco-friendly. The determined conductivity of the prepared biochar is found in the range of semiconductors which make it suitable and promising material to be used as filler in polymer composites and nano composites for many electric and electronic applications.

Authors

Ahmed ZA Hassan,Abdel Wahab M Mahmoud,Gamal M Turky,Gehan Safwat

Journal

Bulgarian Journal of Agricultural Science

Published Date

2020/3/1

Fate of nano soil particles and their influence on geotechnical and physiochemical properties of sandy soil

Laboratory study was conducted to estimate the effectiveness of geotechnical and physio-chemical properties of sandy soil stabilized mixed with nano-fine sandy soil particles. The specimens’ soils were brought together at Ismailia province. Then, through high energy milling process-soil specimens as Nano size were derived powdering process of specimens. Due to the incomplete quantity produced from the powdering process, various percentages (1%, 12%, 3% and 4%) as Nano specimens were added to experiment. The different rates of specimens as Nano size added in sandy soil have suitable moistness at supreme soil density (dry soil). The result shows that the addition of various percentages of Nano-soil particles to sandy land enhanced property of shear strength; particles strength and compressive strong suit of become stable sandy soil. Also data illustrated that the Atterberg limits of sandy soil stabilized using nano-soil were augmented compared to the control treatment. The augmentation of the electrical conductivity of the sandy soil using nano fine soil as filler allows the potential for use it as soil conditioner technologies. Sandy soil treated by nano fine soil cause a valuable augmentation in the electrical characteristics, tensile strength and thermal stability of sandy soil. In addition, soil hydro physical properties of sandy soil were improved by nano fine sandy soil application. In conclusion, applied various percentages of Nano-specimens gave a vital starring role to improve and boosted the geotechnical, hydro physical and dielectric and electrical investigation properties of sandy soils. The result shows that the addition of 1, 2, 3 and 4 …

Authors

Ayman Amin,AZA Hassan,Rania A El-bialy,Abdel Wahab M Mahmoud

Journal

American Journal of Nanomaterials

Published Date

2020

Comparative effects of different organic and inorganic Fertilisers on soil fertility, plant growth, soil microbial community, and storage ability of lettuce

Mohamed M. El-Mogy (* Corresponding author), Mohamed IA Mohamed, Vegetable Crops Department, Faculty of Agriculture, Cairo University, 12613 Giza, Egypt. E-mail: elmogy@ agr. cu. edu. eg Suzy M. Abdelaziz, Department of Cross Pollinated Vegetable Crops, Agriculture Research Centre, Giza, Egypt Abdel Wahab M. Mahmoud, Plant Physiology Department, Faculty of Agriculture, Cairo University, 12613 Giza, Egypt Tarek R. Elsayed, Department of Microbiology, Faculty of Agriculture, Cairo University, 12613 Giza, Egypt Noha H. Abdel-Kader, Soil Department, Faculty of Agriculture, Cairo University, 12613 Giza, Egypt

Authors

Mohamed M El-Mogy,Suzy M Abdelaziz,Abdel Wahab M Mahmoud,Tarek R Elsayed,Noha H Abdel-Kader,Mohamed IA Mohamed

Journal

Agriculture (Pol'nohospodárstvo)

Published Date

2020/11/1

MITIGATION OF WATER STRESS IN TWO PURSLANE (PORTULACA OLERACEAL.) CULTIVARS USING NANO SILICON AND FOLIC ACID

A field experiment was carried out at Faculty of Agriculture, Cairo University, Giza, Egypt, during the two successive seasons of 2018 and 2019 to study the effect of foliar spray with nano silicon or folic acid and their combination on morphological, anatomical and chemical characters of two Purslane (Portulaca oleracea L.) cultivars (Egyptian and Turkey) under three water levels (100, 50 and 30% of field capacity). The results showed that spraying two cultivars with mixture of nano silicon and folic acid at 30% field capacity exhibited significant promotive effects on morphological and chemical characters compared with untreated plants. Concerning anatomical structure of leaf, treatment with a mixture nano silicon and folic acid at 30% of field capacity increase the thickness of both mid vein and lamina due to the increase in thickness of mesophyll tissue as well as in the dimension of the main mid vein bundle. Likewise, such treatment increased stem diameter of cortex, phloem and xylem tissues and decrease parenchymatous area of the pith compared with control. Spraying plants with mentioned mixture treatment at 30% field capacity increased almost all macro and microelements, besides carbohydrate, phenolic and ascorbic acid. Moreover, mixture treatment revealed significant effects of photosynthetic rate, stomatal conductive and water use efficiency compared with control.

Authors

M Azza,AE Ghoniem,Abdel Wahab M Mahmoud

Published Date

2020

Boosting biochemical composition of stevia plant using biochar loaded with beneficial microorganism strains.

The present research was carried out to determine the effect of biochar loaded with either inorganic nitrogen or beneficial microorganism strains (individual and in combination) on biochemical composition and nutritional values of stevia plants (Stevia rebaudiana) grown in sandy soil for two continuous seasons (2018–2019) compared with commercial chemical NPK fertilizers (control). Growth parameters (plant height, number of leaves, leaf area and leaf area index), besides chemical constituents symbolized in (total chlorophylls, ash, protein, fiber, total carbohydrates, essential and non-essential amino acids, mineral nutrients (N, P, K, Mg, Fe and Zn), stevioside, fatty acids and vitamins) were recorded at 60, 90 and 120 days after transplanting. The obtained results in response to the different treatments of biochar and microorganism strains indicated that biochemical ingredients and nutritional values of stevia plants were boosted in comparison to control plants. Hence the application of biochar loaded with beneficial microorganisms as organic and biofertilizers can improve plant growth, enhance plant biochemical components, and ensure safety and sustainable production particularly in new reclaimed areas.

Authors

Abdel Wahab M Mahmoud,Asmaa Badr El-din Sayed El-Attar,Sanaa Esmail Ahmed Esmail,Hoda Sany

Journal

Bulgarian Journal of Agricultural Science

Published Date

2020/7/1

See List of Professors in Abdel Wahab M. Mahmoud University(Cairo University)

Abdel Wahab M. Mahmoud FAQs

What is Abdel Wahab M. Mahmoud's h-index at Cairo University?

The h-index of Abdel Wahab M. Mahmoud has been 16 since 2020 and 17 in total.

What are Abdel Wahab M. Mahmoud's top articles?

The articles with the titles of

Correction: Mahmoud et al. Application of Silicon, Zinc, and Zeolite Nanoparticles—A Tool to Enhance Drought Stress Tolerance in Coriander Plants for Better Growth Performance …

Improvement of potato (Solanum tuberosum L.) micro-tubers formation as effected by nano-particles in-vitro

Co-application of salicylic acid and spermine alleviates salt stress toxicity in wheat: Growth, nutrient acquisition, osmolytes accumulation, and antioxidant response

Evaluation of nano-nitrogen fertilizers and other nitrogen sources on the performance of Guinea grass plants grown in newly reclaimed soil under water deficiency

Application of silicon, zinc, and zeolite nanoparticles—A tool to enhance drought stress tolerance in coriander plants for better growth performance and productivity

Efficiency of different potassium sources, and soil bio-fertilizers for growth, productivity, and biochemical constituents of Narcissus (Narcissus tazetta L.)

Exogenous Appliance of Nano-Zeolite and Nano-Silicon Elevate Solidago canadensis Invasive Plant Tolerance to Water Deficiency

Natural extracts elevated drought resistance in Iris tingitana plant.

...

are the top articles of Abdel Wahab M. Mahmoud at Cairo University.

What are Abdel Wahab M. Mahmoud's research interests?

The research interests of Abdel Wahab M. Mahmoud are: Plant eco-physiology and nanoparticles

What is Abdel Wahab M. Mahmoud's total number of citations?

Abdel Wahab M. Mahmoud has 1,394 citations in total.

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