Publications by authors named "Ahmad A Omar"

Article Synopsis
  • - Huanglongbing disease (HLB) is a serious threat to the 'Kinnow' mandarin in Pakistan, caused by a bacterial species and spread by the Asian citrus psyllid insect.
  • - The study explored the use of selenium nanoparticles (SeNPs) synthesized from garlic extract to enhance fruit quality and antioxidant defenses in HLB-infected 'Kinnow' plants, finding that a 75 mg/L concentration significantly improved various fruit characteristics and antioxidant enzyme levels.
  • - Proteomics analysis showed that SeNPs affected the expression of proteins related to growth and stress response, indicating that their application can improve the nutritional quality and overall health of HLB-affected mandarin fruit.
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Introduction: The significant effect of deep neuromuscular block (NMB) in laparoscopic surgery is still controversial, especially in lower-pressure pneumoperitoneum. This study investigates the effect of deep neuromuscular block on intraabdominal pressure (IAP), surgical space quality, post-operative abdominal pain, and shoulder tip pain in laparoscopic gynaecological surgery.

Material And Methods: This is a randomised, double-blinded control trial which randomised samples to moderate NMB (train-of-four count [TOF] of 1 or 2) or deep NMB (post-tetanic count [PTC] of 1 or 2).

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Introduction: Citrus canker, caused by subsp. citri (), is a devastating disease worldwide. Previously, we successfully generated canker-resistant cv.

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Objective: hCG is commonly used as an ovulation trigger in IVF. Its usage is associated with OHSS. GnRH agonist is an alternative to hCG and is associated with reduced incidence of OHSS.

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Citrus canker caused by Xanthomonas citri subsp. citri (Xcc) is a destructive citrus disease worldwide. Generating disease-resistant cultivars is the most effective, environmentally friendly and economic approach for disease control.

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Ovarian cysts are rare in children. Their common presentation is acute abdomen, which can be a life-threatening event that needs emergent investigation and intervention. Herein, we report a gynaecological case of a twisted ovarian cyst in an 11-year-old girl who presented to the emergency department with sudden-onset generalised abdominal pain.

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In this study, the role of selenium nanoparticles (SeNPs, 10 mg·L) has been investigated in modulating the negative effects of drought and heat stresses on eight bread wheat ( L.) genotype seedlings. Those genotypes included Giza-168, Giza-171, Misr-1, Misr-3, Shandweel-1, Sids-1, Sids-12, and Sids-14.

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Mandarin 'Murcott' ( Blanco) trees aged five years that were grafted onto lemon 'Volkamer' () rootstock and grown in sandy soil under a drip irrigation system were used in this study during the growing seasons of 2018 and 2019. Ten different fertilization treatments combining inorganic, organic, and biofertilization in a completely randomized block were performed. The results revealed that fertilizing 'Murcott' mandarin trees with 75% of the recommended dose (RD) of nitrogen as inorganic nitrogen (33.

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Protoplasts are an attractive explant source for biotechnological tools widely used on citrus genetic improvement, such as somatic hybridization and direct genetic transformation. These delicate and responsive materials are subjected to cell proliferation induction and differentiation of somatic embryos which further regenerate into entire plants. The isolation of viable protoplasts followed by regeneration of plants through somatic embryogenesis is an important methodology for breeding applications.

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Salinity is widespread environmental stress that poses great obstacles to rapeseed development and growth. Polyamines are key plant growth regulators that play a pivotal role in regulating salt tolerance. Rapeseed ( L.

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In this study, we evaluated bioinspired titanium dioxide nanoparticles (TiO NPs) that elicited biochemical and proteome modifications in wheat plants under the biotic stress caused by . sp. ().

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Green synthesized cerium oxide nanoparticles (GS-CeO NPs) have a unique size, shape, and biofunctional properties and are decorated with potential biocompatible agents to perform various therapeutic actions, such as antimicrobial, anticancer, antidiabetic, and antioxidant effects and drug delivery, by acquiring various mechanistic approaches at the molecular level. In this review article, we provide a detailed overview of some of these critical mechanisms, including DNA fragmentation, disruption of the electron transport chain, degradation of chromosomal assemblage, mitochondrial damage, inhibition of ATP synthase activity, inhibition of enzyme catalytic sites, disorganization, disruption, and lipid peroxidation of the cell membrane, and inhibition of various cellular pathways. This review article also provides up-to-date information about the future applications of GS-CeONPs to make breakthroughs in medical sectors for the advancement and precision of medicine and to effectively inform the disease diagnosis and treatment strategies.

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This study aimed to identify new rice lines and hybrids that are tolerant to water deficit and produce high yields under water stress conditions. A line × tester mating design was used to study the lines and testers' general combining ability (GCA) effects. The specific combining ability (SCA) of the hybrid rice combinations was measured under three different irrigation regimes; 6, 9, and 12 days.

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This research was carried out at the Experimental Farm of Sakha Agricultural Research Station, Sakha, Kafr El-Sheikh, Egypt, during the 2018-2020 rice-growing seasons to develop and evaluate four iso-cytoplasmic rice-restorer lines: NRL79, NRL80, NRL81, and NRL82, as well as Giza 178, with ten new hybrids in order to estimate genotypic coefficient, phenotypic coefficient, heritability in a broad sense, and advantage over Giza 178 as a check variety (control) of new restorer lines. This study also estimated combining ability, gene action, better-parent heterosis (BP), mid-parents heterosis (MP), and standard heterosis (SH) over Egyptian Hybrid one (IR69A × Giza 178) as a check hybrid (control) for grain yield, agronomic traits, and some grain quality characters in restorer lines and hybrids. The percentage of advantage over commercial-variety Giza 178 (check) was significant, and highly significant among the newly developed restorer fertility lines for all the studied traits.

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Citrus greening or huanglongbing (HLB) is commonly known as yellow dragon disease and affects citrus production worldwide. Therefore, it has a significant impact on and deleterious effects in the agro-industrial sector. Significant efforts have been made to combat this disease and mitigate its destructive impact on citrus production, but still, there is no effective biocompatible treatment available to control HLB disorder.

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Barley production is essential in Egypt. In the present study, 15 different six-rowed Egyptian barley cultivars were studied. To differentiate between the different cultivars under study in terms of morphological characteristics and ISSR, molecular characterization reactions were carried out.

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Citrus canker caused by subsp. is one of the most devastating citrus diseases worldwide. Generating disease-resistant citrus varieties is considered one of the most efficient and environmentally friendly measures for controlling canker.

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The prevalence of hypertension (HTN) in children is increasing. Early detection of HTN in childhood may prevent the occurrence of complications in adult age. Blood pressure (BP) varies between populations according to ethnic and environmental factors.

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The citrus industry at present is severely affected by huanglongbing disease (HLB). HLB is caused by the supposed bacterial pathogen " Liberibacter asiaticus" and is transmitted by the insect vector, the Asian citrus psyllid, Kuwayama. Developing new citrus hybrids to improve HLB management is much needed.

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Melatonin improves the tolerance of plants to various environmental stresses by protecting plant cells against oxidative stress damage. The objective of the current study was to determine whether exogenous melatonin (MT) treatments could help protecting peanut ( ) seedlings against salinity stress. This was achieved by investigating enzymatic and non-enzymatic antioxidant systems and the expression of melatonin biosynthesis related genes in response to salinity stress with or without exogenous MT.

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A total of 53 plant species accessions from different geographic regions, including four melatonin precursor-coding genes obtained from Arachis hypogaea (ASMT1, 2, 3 and T5H) underwent extensive molecular evolutionary analyses. Evolutionary relationships were inferred and showed that dichotomous bifurcating trees did not reflect the true phylogeny since reticulate events took place due likely to recombination. Thus, a phylogenetic network was reconstructed for each type of enzyme and highlighted the presence of such incompatibilities.

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Article Synopsis
  • The study investigated how drought stress affects the production and accumulation of silymarin, a beneficial compound in milk thistle, by analyzing physiological responses and gene expression.
  • Findings showed that drought stress reduced essential nutrients like chlorophyll and ascorbic acid, but increased antioxidants and related enzyme activities, confirming oxidative stress in milk thistle.
  • The research highlighted that severe drought conditions led to greater accumulation of silymarin and its most active component, silybin, alongside increased expression of biosynthetic genes during drought.
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