Ibrahim Ahmed Elnaggar

@azhar.edu.eg

Department of Horticulture, Faculty of Agriculture, Al-Azhar University
Department of Horticulture, Faculty of Agriculture, Al-Azhar University

Ibrahim Ahmed Elnaggar


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https://researchid.co/elnaggar

RESEARCH, TEACHING, or OTHER INTERESTS

Horticulture, Agricultural and Biological Sciences, General Agricultural and Biological Sciences, Agronomy and Crop Science
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Scopus Publications

Scopus Publications

  • Improving leaf chemical composition, yield, and fruit quality of Valencia orange trees through biochar soil application
    Adel M. Al-Saif, Alsayed E. Mekky, Abd El-wahed N. Abd El-wahed, Hosny F. Abdel-Aziz, Ibrahim A. Elnaggar, et al.
    Scientific Reports, 2026
  • Evaluating the influence of magnetic iron as an eco-friendly soil amendment applications on agronomic and fruit quality parameters of ‘Fremont’ mandarin
    Ashraf E. Hamdy, Alsayed E. Mekky, Hosny F. Abdel-Aziz, Abd El-wahed N. Abd El-wahed, Ibrahim A. Elnaggar, et al.
    Scientific Reports, 2026
  • Foliar application of chitosan nanoparticles and N-ATCA enhances olive yield and oil quality
    Amr Elkelish, Abd El-Wahed N. Abd El-Wahed, Ibrahim A. Elnaggar, Hosny F. Abdel-Aziz, Ashraf E. Hamdy, et al.
    Scientific Reports, 2026
  • Pre-harvest Foliar Spray of Calcium, GA3, and Salicylic Acid to Enhance Apricot Yield and Fruit Quality
    Adel M. Al-Saif, Hosny F. Abdel-Aziz, Abd El-wahed N. Abd El-wahed, Sobhy M. Khalifa, Ibrahim A. Elnaggar, et al.
    Bioresources, 2025
    The impact of different pre-harvest foliar sprays was assessed relative to the yield and quality of apricot fruits (cv. El-Amal) under field conditions. Apricot trees were sprayed with various solutions, including salicylic acid (SA at 250 and 750 ppm), calcium acetate [Ca(OAc)₂ at 2% and 4%], calcium chloride (CaCl₂ at 2% and 4%), and gibberellic acid (GA₃ at 25 and 100 ppm) at the pit hardening growth stage before harvest. All foliar spray treatments positively affected fruit yield per tree compared to untreated plants. The most effective treatments were CaCl₂ at 4% and GA₃ at 100 ppm, followed by SA at 750 ppm and Ca(OAc)₂ at 4%. All treatments significantly increased fruit weight compared to the control group. GA₃ also significantly improved fruit firmness, outperforming all other treatments. Additionally, CaCl₂ at 2% and SA at 250 ppm resulted in higher firmness. SA at 750 ppm exhibited higher total soluble solid (TSS) content. While the foliar spray treatment without any solution resulted in the lowest fruit acidity, SA at 250 ppm had the highest acidity. In conclusion, pre-harvest foliar application of GA₃ (100 ppm), CaCl₂ (2%), and Ca(OAc)₂ (4%) can effectively enhance fruit yield and improve quality of apricots.
  • 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, et al.
    Egyptian Journal of Chemistry, 2024
  • Nano-enhanced growth and resilience strategies for Pomegranate cv. Wonderful: Unveiling the impact of zinc and boron nanoparticles on fruit quality and abiotic stress management
    Abd El-wahed N. Abd El-wahed, Sobhy M. Khalifa, Mashael Daghash Alqahtani, Ahmed M. Abd –Alrazik, Hosny Abdel-Aziz, et al.
    Journal of Agriculture and Food Research, 2024
  • 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, et al.
    Peerj, 2024
    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.
  • In Vitro Drought Tolerance of Some Grape Rootstocks
    Abdullah I. Alebidi, Adel M. Al-Saif, Hosny F. Abdel Aziz, Gamal A. Abdrabboh, Ibrahim A. Elnaggar, et al.
    Journal of Ecological Engineering, 2024
    Climate change is increasing the frequency and severity of drought strain, which poses a first-rate task to grapevine production. This have a look at investigated the response of four grape rootstocks (Richter, Salt Creek, Freedom, and Dogridge) to water deficit prompted by way of polyethylene glycol (PEG). Two pressure induction techniques had been as compared: surprise remedy, related to direct exposure of cultures to growing PEG concentrations (0%, 2%, 4%, 6%, 8%, and 10%); and step-clever long-time period remedy, steadily increasing PEG concentrations (0%, 6%, 8%, and 10%) through the years. The essential findings were as fol - lows: drought strain negatively impacted all rootstocks, leading to decreased morphological tendencies (shoot number, period, and root number), survival %, and biochemical parameters (chlorophyll a and b, carotenoids, stomata popularity, RWC content material). It additionally led to reduced nutrient accumulation (N, P, K, Mg, Ca) in leaves. However, all rootstocks exhibited increased Proline content and antioxidant enzyme hobby under all PEG concentrations. In phrases of rootstock-unique responses, Richter and Salt Creek showed the maximum sturdy performance, maintaining better shoot and root growth, nutrient content, and photosynthetic hobby compared to Freedom and Dogridge. On the alternative hand, Freedom and Dogridge exhibited extra sensitivity to drought stress, experiencing stronger discounts in boom, biochemical parameters, and nutrient accumulation. In conclusion Richter and Salt Creek rootstocks could be valuable equipment for reinforcing drought tolerance in grapevines. The two carried out PEG remedies provide valuable methods for screening and deciding on drought-tolerant grape rootstocks.
  • Morphological, Physiological, and Biochemical Responses of Some Olive Tree Cultivars to Low Temperature Stress
    Adel M. Al-Saif, Hosny F. Abdel-Aziz, Haitham El-khamissi, Ahmed F. Abd El-Hakim, Abd El-wahed N. Abd El-wahed, et al.
    Bioresources, 2024
    This study evaluated the impact of night frost incidents on the biochemical, physiological, and reproductive functions of the olive varieties Manzanillo, Coratina, Koroneiki, and Picual. Certain cultivars were more suited to moderate cold night stress than others, based on the changes in the performance of the stressed plants, including vegetative growth, tree yield, fruit physical characteristics, and fruit chemical characteristics. Compared to other tested cultivars, the biochemical responses of the plants in terms of photosynthetic pigments, relative water content (RWC), total phenolic compounds, total flavonoid, and antioxidant enzyme accumulation demonstrated that some cultivars could withstand the applied stress. The conclusion that some cultivars responded differently to cold stress than others was supported by the plant phenology. This research could be a game-changer for farmers. By understanding how olive trees adapt to cold snaps, a common stressor in open fields, they can make informed decisions about breeding and choosing the best cultivars, ultimately leading to more resilient crops. The results showed that all tested olive tree cultivars differ significantly regarding cold stress conditions. Coratina and Koroneiki were the most resistant tested cultivars in terms of biochemical, physiological, and reproductive functions, followed in ascending order by Manzanello and Picual.
  • Improvement of Fruit Quality and Phytochemical Components of Pomegranate by Spraying with B2O3 and ZnO Nanoparticles
    Adel M. Al-Saif, Ibrahim A. Elnaggar, Abd El-wahed N. Abd El-wahed, Ibrahim M. Taha, Hosny F. Abdel-Aziz, et al.
    Agronomy, 2023
    Pomegranate is one of the most important and widely distributed trees. Boron and zinc are important nutrients for plant growth and fruit quality. Nanotechnology has emerged as one of the most innovative scientific fields in agriculture. This study was conducted to describe the changes in the physiochemical characteristics (weight, diameter, length, firmness and color), as well as the phytochemicals attributes (total phenolics, total flavonoids, ascorbic acid, anthocyanin and antioxidant %) and minerals contents, of pomegranates fruits of the ‘Wonderful’ cultivar as a result of spraying pomegranate trees using nanomaterials (zinc oxide (ZnONPs) and boron oxide (B2O3NPs)). In three successive developmental stages (full bloom, 6 weeks after full bloom and one month before harvest time), the trees were sprayed with 0.25, 0.5 and 1 g/L ZnONPs, as well as 0.25, 0.5 and 1 g/L B2O3NPs during the 2021 and 2022 seasons. The application of ZnONPs and B2O3NPs influenced the qualitative characteristics of the fruits in the studied seasons. The highest marketable % was observed for the 0.50 and 1 g/L ZnONPs and 1 g/L B2O3NPs compared to the other treatments. Also, a positive effect was recorded for the ZnONPs and B2O3NPs on the fruits’ physical properties. All of the ZnONP and B2O3NP treatments resulted in increasing the total phenolic, flavonoid, anthocyanin and ascorbic acid contents and the antioxidant activity in the pomegranate juices. In conclusion, our results suggest that spraying pomegranate trees with ZnONPs and B2O3NPs improves the marketable fruit, enhances the fruit quality and increases the bioactive components and antioxidant activity.
  • Pruning Boosts Growth, Yield, and Fruit Quality of Old Valencia Orange Trees: A Field Study
    Adel M. Al-Saif, Hosny F. Abdel-Aziz, Sobhy M. Khalifa, Ibrahim A. Elnaggar, Abd El-wahed N. Abd El-wahed, et al.
    Agriculture Switzerland, 2023
  • 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, et al.
    Life, 2023
  • 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, et al.
    Notulae Botanicae Horti Agrobotanici Cluj Napoca, 2023
  • The Effect of Different Processing Methods on the Behavior of Minerals Content in Food Products
    Khalid Alshallash, Mohamed Shahat, Mohamed Ibrahim, Ahmed Hegazy, Ashraf Hamdy, et al.
    Journal of Ecological Engineering, 2023
  • Using chitosan nanoparticles and N-acetyl thiazolidine 4-carboxylic acid for olive trees efficiency raising, improving fruits properties and oil quality
    K. S. Alshallash, I. Elnaggar, A. N. A. Abd El-wahed, A. Fahmy, A. M. Tawfeeq, et al.
    Brazilian Journal of Biology, 2023
  • Effect of Chitosan Nanoparticles as Edible Coating on the Storability and Quality of Apricot Fruits
    Eman H. A. Algarni, Ibrahim A. Elnaggar, Abd El-wahed N. Abd El-wahed, Ibrahim M. Taha, Huda A. AL-Jumayi, et al.
    Polymers, 2022
  • Laparoscopic pyloromyotomy in infantile hypertrophic pyloric stenosis using a myringotomy knife
    Ibrahim A. Elnaggar, Akram M. Elbatarny, Mohamed G. Khiralla, Mohamed F. Mewally
    Annals of Pediatric Surgery, 2018