Magdy Abd-elwahab Abd-elfatah Omar

@azhar.edu.eg



           

https://researchid.co/magdyomar
4

Scopus Publications

Scopus Publications

  • Biodegradable Nanoparticle Coating from Chitosan, Salicylic Acid and Banana Peel Extract Enhances Shelf Life of "Murcott " Fruits
    Ashraf Hamdy, Ibrahim Elnagar, Eman Mohammed Hammad, Aliaa A. Almashad, Ahmed Elmezien, Magdy Abd-elwahab Omar, Hosny F Abdel-Aziz, Abd El-wahed N Abd El-wahed, and Marwa E. Abd El-Sadek
    Egyptian Knowledge Bank

  • Effect of Normal and Magnetized Greywater on Growth, Mineral Hemostasis and Antioxidant Content in Zucchini (Cucurbita pepo L.)
    Atif Moussa, Magdy Omar, Ahmed Mancy, Abdelghafar Abu-Elsaoud, Ibrahim Ali, Ehab Azab, and Amr Elkelish
    Egyptian Knowledge Bank

  • Licorice-root extract and potassium sorbate spray improved the yield and fruit quality and decreased heat stress of the ‘osteen’ mango cultivar
    Adel M. Al-Saif, Haitham Ahmed El-khamissi, Ibrahim Ahmed Elnaggar, Mohammed Hamdy Farouk, Magdy Abd El-Wahab Omar, Abd El-wahed Naser Abd El-wahed, Ashraf Ezzat Hamdy, and Hosny Fathy Abdel-Aziz
    PeerJ
    Heat stress, low mango yields and inconsistent fruit quality are main challenges for growers. Recently, licorice-root extract (LRE) has been utilized to enhance vegetative growth, yield, and tolerance to abiotic stresses in fruit trees. Potassium sorbate (PS) also plays a significant role in various physiological and biochemical processes that are essential for mango growth, quality and abiotic stress tolerance. This work aimed to elucidate the effects of foliar sprays containing LRE and PS on the growth, yield, fruit quality, total chlorophyll content, and antioxidant enzymes of ‘Osteen’ mango trees. The mango trees were sprayed with LRE at 0, 2, 4 and 6 g/L and PS 0, 1, 2, and 3 mM. In mid-May, the mango trees were sprayed with a foliar solution, followed by monthly applications until 1 month before harvest. The results showed that trees with the highest concentration (6 g/L) of LRE exhibited the maximum leaf area, followed by those treated with the highest concentration (3 mM) of PS. Application of LRE and PS to Osteen mango trees significantly enhanced fruit weight, number of fruits per tree, yield (kg/tree), yield increasing%, and reduced number of sun-burned fruits compared to the control. LRE and PS foliar sprays to Osteen mango trees significantly enhanced fruit total soluble solids ˚Brix, TSS/acid ratio, and vitamin C content compared to the control. Meanwhile, total acidity percentage in ‘Osteen’ mango fruits significantly decreased after both LRE and PS foliar sprays. ‘Osteen’ mango trees showed a significant increase in leaf area, total chlorophyll content, total pigments, and leaf carotenoids. Our results suggest that foliar sprays containing LRE and PS significantly improved growth parameters, yield, fruit quality, antioxidant content, and total pigment concentration in ‘Osteen’ mango trees. Moreover, the most effective treatments were 3 mM PS and 6 g/L LRE. LRE and PS foliar spray caused a significant increase in yield percentage by 305.77%, and 232.44%, in the first season, and 242.55%, 232.44% in the second season, respectively.

  • Effects of Fogging System and Nitric Oxide on Growth and Yield of ‘Naomi’ Mango Trees Exposed to Frost Stress
    Hosny F. Abdel-Aziz, Ashraf E. Hamdy, Ahmed Sharaf, Abd El-wahed N. Abd El-wahed, Ibrahim A. Elnaggar, Mahmoud F. Seleiman, Magdy Omar, Adel M. Al-Saif, Muhammad Adnan Shahid, and Mohamed Sharaf
    MDPI AG
    In years with unfavorable weather, winter frost during the blossoming season can play a significant role in reducing fruit yield and impacting the profitability of cultivation. The mango Naomi cultivar Mangifera indica L. has a low canopy that is severely affected by the effects of frost stress. As a result of the canopy being exposed to physiological problems, vegetative development is significantly inhibited. The current investigation aimed to study the influence of spraying nitric oxide and fogging spray systems on Naomi mango trees grafted on ‘Succary’ rootstock under frost stress conditions. The treatments were as follows: nitric oxide (NO) 50 and 100 μM, fogging spray system, and control. In comparison to the control, the use of nitric oxide and a fogging system significantly improved the leaf area, photosynthesis pigments of the leaf, the membrane stability index, yield, and physical and chemical characteristics of the Naomi mango cultivar. For instance, the application of 50 μM NO, 100 μM NO, and the fogging spray system resulted in an increase in yield by 41.32, 106.12, and 121.43% during the 2020 season, and by 39.37, 101.30, and 124.68% during the 2021 season compared to the control, respectively. The fogging spray system and highest level of NO decreased electrolyte leakage, proline content, total phenolic content, catalase (CAT), peroxidases (POX), and polyphenol oxidase (PPO) enzyme activities in leaves. Furthermore, the number of damaged leaves per shoot was significantly reduced after the application of fogging spray systems and nitric oxide in comparison to the control. Regarding vegetative growth, our results indicated that the fogging spray system and spraying nitric oxide at 100 μM enhanced the leaf surface area compared to the control and other treatments. A similar trend was noticed regarding yield and fruit quality, whereas the best values were obtained when the fogging spray system using nitric oxide was sprayed at a concentration of 100 μM. The application of fogging spray systems and nitric oxide can improve the production and fruit quality of Naomi mango trees by reducing the effects of adverse frost stress conditions.

  • Utilization of jojoba oil and salicylic acid as postharvest treatment on storability and fruit quality of ‘Late Swelling’ peach cultivar
    Khalid S. ALSHALLASH, Ibrahim A. ELNAGGAR, Abd El-wahed N. ABD EL-WAHED, Ashraf E. HHMDY, Hosny F. ABDEL-AZIZ, and Magdy A. OMAR
    University of Agricultural Sciences and Veterinary Medicine Cluj-Napoca
    The ‘Late-Swelling’ peach is an important cultivar due to its attributes of fruit quality, such as handling ability and late harvest season. Peaches rapidly deteriorate during storage, which shortens their shelf-life. The preservation of quality traits of ‘Late-Swelling’ peach during handling and storage investigated. Fruits harvested in the early ripe stage (last week of June) were either dipped in jojoba oil (JO) 500, 1000, and 1500 ppm and salicylic acid (SA) 100, 200, and 300 ppm, then stored at 5+1 °C and 85% RH for 35 days besides 7 days as shelf-life the fruits were examined every 7 days until the end of the experiment. Positive influences were observed for JO and SA on the different chemical and physical characteristics of the peach fruits under study especially those related to storability and fruit quality. All fruits treated with JO 1500 and 1000 ppm, and SA 300 ppm maintained the fruit firmness, hº, total acidity, and ascorbic acid over the whole storage period, in addition to the lowest decay and weight loss, as well as maintaining the fruit sensory quality and decreased peroxidase [PPO] activity while increasing polyphenol oxidase [POD], catalase [CAT], and ascorbate peroxidase [APX] activities compared with the control at the end of shelf-life period. In conclusion, our results suggest using JO and SA to enhance and prolong the storability of peach fruits at 5+1 °C and 85% RH.

  • Improvement of Selected Morphological, Physiological, and Biochemical Parameters of Banana (Musa acuminata L.) Using Potassium Silicate under Drought Stress Condition Grown in vitro
    Hosny Abdel Aziz, Mohamed Sharaf, Magdy Omar, Ahmed Abou El-Yazied, Nada Ibrahim AlJwaizea, Shaimaa Ismail, Mohamed M. A. Omar, Khadiga Alharbi, Amr Elkelish, and Moataz Tawfik
    Computers, Materials and Continua (Tech Science Press)

  • Improving the Production of Total Phenolics and Flavonoids and the Antioxidant Capacity of Echinacea purpurea Callus through Biotic Elicitation
    Omar Elshahawy, Mohamed Zeawail, Mohamed Hamza, Ahmed Elateeq, and Magdy Omar
    Egypts Presidential Specialized Council for Education and Scientific Research

  • Effect of fertilizing with different levels of phosphorous and zinc on the botanical characteristics of table beet (Beta vulgaris L.)
    Ebtesam A. GASHASH, Ashmawi E. ASHMAWI, Ahmed M. EL-TAHER, Magdy A. OMAR, Nahid A. OSMAN, Noura M. TAHA, and Amr ELKELISH
    University of Agricultural Sciences and Veterinary Medicine Cluj-Napoca
    The interaction of phosphorus (P) and zinc (Zn) is a crucial factor affecting crop yield in agricultural production called a P-induced Zn deficiency. The application of Zn and P together reduces deficiencies and increases plant growth by more than the sum of the increases from Zn and P alone. This experiment was carried out during two seasons, in consecutive years, to study the effect of P and Zn levels on the physical, physiological and anatomical response in table beet plants. Treatment one was as control; the second treatment was 35 P units with 5, 10, and 20 Zn units; the third treatment was 40 P units with 5, 10, and 20 Zn units; and the fourth treatment was 45 P units with 5, 10, and 20 Zn units. The data showed that the number of leaves and the root diameters were high with the addition of 40 P units and 10 Zn units, and the roots fresh and dry weights were high under 40 P units and 10 Zn units in both seasons. The contents of TSS, AA, TS, ACY, N, P, and K were significantly increased by the use of 40 and 45 P units combined with 5 and 10 Zn units. The anatomical alterations in both leaf blade, epidermal layers, midrib zone, vessel diameter, vascular bundle area, palisade, and spongy tissues were studied. The results recommend that fertilizing table beet plants with 40 P units and 10 Zn units is suitable.

  • Effect of salt stress and foliar application of salicylic acid on morphological, biochemical, anatomical, and productivity characteristics of cowpea (Vigna unguiculata L.) plants
    Ahmed M. El-Taher, Hany S. Abd El-Raouf, Nahid A. Osman, Samah N. Azoz, Magdy A. Omar, Amr Elkelish, and Mahmoud A. M. Abd El-Hady
    MDPI AG
    The present study aimed to investigate the impact of salinity on vegetative growth, chemical constituents, and yields of cowpeas (Vigna unguiculata) and the possible benefits of salicylic acid (SA) on these plants after damage from salinity. To achieve these objectives, two pot experiments were carried out at the Faculty of Agriculture, Al-Azhar University, Egypt, during the two growing seasons of 2019 and 2020. The results revealed that salinity significantly decreased, and SA treatment substantially increased the plant height, number of compound leaves, number of internodes per plant, fresh weights of leaves and stems, productivity, photosynthetic pigments content, and concentrations of nitrogen (N), phosphorus (P), and potassium (K) of the cowpea plants compared with the control. The anatomical structure of stems and leaves of the plants were also investigated, and it was found that positive variations in the anatomical structure of the median portion of the main stems and blades of mature foliage leaves were detected in the stressed and SA-treated plants. In conclusion, SA treatment increased the salt stress tolerance of cowpea plants by improving the morphological and physiological attributes of the plants.