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Ahmad AlSayed Mohamad Omar

Ahmad AlSayed Mohamad Omar

LiveDNA ID: 20.835
ACSE
56 Publications
3 Editorial Roles
0 Projects

About

Professional Summary

Dr. Ahmad AlSayed Mohamad Omar is currently working as Associate Professor at Plant Genetics Improvement, Department of Horticulture Sciences, University of Florida, Citrus research and Education Center, Lake Alfred, Florida, USA. He has completed his PhD in Horticulture, and Post-Doctoral Research Associate from same University. Previously he was appointed as Chemist and Researcher, and Assistant Professor at Plant Biochemistry and Molecular Biology, Biochemistry Department, College of Agriculture, Zagazig University, Zagazig, Egypt. He is professional member of The Society for In Vitro Biology, American Society of Horticultural Science, International Society of Citroculture, and International Society for Horticultural Science, Florida State Horticultural Society, American Society of Plant Biologist, and The Egyptian Society of Agriculture Biochemistry. Dr. Ahmad received honors includes Recipient of the Distinguished Scholar Award of the Arab Fund Fellowship Program, The SIVB Student Award for the best student paper presented at the In Vitro Biology Meeting, Ministry of Higher Education, Egypt, Ph.D. Scholarship, and Zagazig University Highest Distinction Awards for achieving the highest standing in the undergraduate program in the College of Agriculture. He is also serving as member of editorial board and reviewer for journals such as American Journal of Plant Physiology, Biotechnology, Asian Journal of Plant Sciences, Asian Journal of Biochemistry, American Journal of Biochemistry and Molecular Biology, Biotechnology Progress, International journal of Agricultural and Food Research, International Journal of Molecular Sciences, Molecular Biology Reports, Plant Cell, Tissue and Organ Culture and HortScience. He has 22 publications in journals as author/co-author.

Education

Academic Background
  • PostDoc. University of Florida, USA Plant Biotechnology | Completed: 2009
  • Ph.D. University of Florida, Florida, USA Plant Molecular Biology | Completed: 2006
  • M.Sc. Zagazig University, Zagazig, Egypt Biochemistry | Completed: 1997
  • B.Sc. Zagazig University, Zagazig, Egypt Agricultural Chemistry | Completed: 1993

Editorial Services

Editorial & Publishing Roles
The International Journal of Applied Economics and Finance
Editorial Board Member

Serving as Editorial Board Member for The International Journal of Applied Economics and Finance.

Asian Journal of Marketing
Editorial Board Member

Serving as Editorial Board Member for Asian Journal of Marketing.

Trends in Horticultural Research
Editorial Board Member

Serving as Editorial Board Member for Trends in Horticultural Research.

Publications (56)

Selected Scholarly Contributions
Role of Serotonin in Cadmium Mitigation in Plants
Hesham F. Oraby, Nehal Z. Elnaggar, Ahmad A. Omar, Azza H. Mohamed
Plants | Journal Article
10.3390/plants14121738
Crossref
2025
Effectiveness of DNA barcoding, SCOT markers and phytochemical characterization in biodiversity assessment of some Zea mays hybrids
Rehab M. Rizk, Ehab M. Zayed, Ali H. Amin, Ahmad A. Omar, Hesham F. Oraby
South African Journal of Botany | Journal Article
10.1016/j.sajb.2023.12.020
Crossref
2024
Description of phenotype, grain quality, molecular fingerprinting, and biodiversity using DNA barcoding of some elite rice genotypes
Ahmad A. Omar, Ehab M. Zayed, Hesham F. Oraby, Nehal Z. Elnaggar, Mohamed M.A. Elashtokhy, Mostafa M. Basuoni, Ali Osman, Sahar A.M. Shamseldin, Kotb A. Attia, Azza H. Mohamed
South African Journal of Botany | Journal Article
10.1016/j.sajb.2023.01.045
Crossref
2023
Conferring of Drought and Heat Stress Tolerance in Wheat (Triticum aestivum L.) Genotypes and Their Response to Selenium Nanoparticles Application
Ahmad A. Omar, Yasmin M. Heikal, Ehab M. Zayed, Sahar A. M. Shamseldin, Yossry E. Salama, Khaled E. Amer, Mostafa M. Basuoni, Sawsan Abd Ellatif, Azza H. Mohamed
Nanomaterials | Journal Article
10.3390/nano13060998
Crossref
2023
Humic Acid Improves the Resilience to Salinity Stress of Drip-Irrigated Mexican Lime Trees in Saline Clay Soils
Hassan A. Ennab, Azza H. Mohamed, Hanan M. El-Hoseiny, Ahmad A. Omar, Islam F. Hassan, Maybelle S. Gaballah, Soha E. Khalil, Amany M. Mira, Ahmed F. Abd El-Khalek, Shamel M. Alam-Eldein
Agronomy | Journal Article
10.3390/agronomy13071680
Crossref
2023
Generation of the transgene-free canker-resistant Citrus sinensis using Cas12a/crRNA ribonucleoprotein in the T0 generation
Hang Su, Yuanchun Wang, Jin Xu, Ahmad A. Omar, Jude W. Grosser, Milica Calovic, Liyang Zhang, Yu Feng, Christopher A. Vakulskas, Nian Wang
Nature Communications | Journal Article
10.1038/s41467-023-39714-9
Crossref
2023
Development of New Iso-Cytoplasmic Rice-Restorer Lines and New Rice Hybrids with Superior Grain Yield and Grain Quality Characteristics by Utilizing Restorers’ Fertility Genes
Mamdouh M. A. Awad-Allah, Kotb A. Attia, Ahmad Alsayed Omar, Eldessoky S. Dessoky, Fahad Mohammed Alzuaibr, Mohammed Ali Alshehri, Mohamed A. Abdein, Azza H. Mohamed
Genes | Journal Article
10.3390/genes13050808
Crossref
2022
Combining Ability and Gene Action Controlling Agronomic Traits for Cytoplasmic Male Sterile Line, Restorer Lines, and New Hybrids for Developing of New Drought-Tolerant Rice Hybrids
Mamdouh Awad-Allah, Kotb Attia, Ahmad Omar, Azza Mohamed, Rehab Habiba, Fahad Alzuaibr, Mohammed Alshehri, Mohammed Alqurashi, Salman Aloufi, Eldessoky Dessoky, Mohamed Abdein
Genes | Journal Article
10.3390/genes13050906
Crossref
2022
Phytogenic Selenium Nanoparticles Elicited the Physiological, Biochemical, and Antioxidant Defense System Amelioration of Huanglongbing-Infected ‘Kinnow’ Mandarin Plants
Muhammad Ikram, Naveed Iqbal Raja, Zia-Ur-Rehman Mashwani, Ahmad Alsayed Omar, Azza H. Mohamed, Seema Hassan Satti, Efat Zohra
Nanomaterials | Journal Article
10.3390/nano12030356
Crossref
2022
Efficacy of Green Cerium Oxide Nanoparticles for Potential Therapeutic Applications: Circumstantial Insight on Mechanistic Aspects
Maarij Khan, Zia-ur-Rehman Mashwani, Muhammad Ikram, Naveed I. Raja, Azza H. Mohamed, Guogang Ren, Ahmad A. Omar
Nanomaterials | Journal Article
10.3390/nano12122117
Crossref
2022
Plant-Based Titanium Dioxide Nanoparticles Trigger Biochemical and Proteome Modifications in Triticum aestivum L. under Biotic Stress of Puccinia striiformis
Seema Hassan Satti, Naveed Iqbal Raja, Muhammad Ikram, Hesham F. Oraby, Zia-Ur-Rehman Mashwani, Azza H. Mohamed, Ajit Singh, Ahmad A. Omar
Molecules | Journal Article
10.3390/molecules27134274
Crossref
2022
Polyamines mitigate the destructive impacts of salinity stress by enhancing photosynthetic capacity, antioxidant defense system and upregulation of calvin cycle-related genes in rapeseed (Brassica napus L.).
ElSayed, A.I., A.H. Mohamed, M.S. Rafudeen, A.A. Omar, M.F. Awad and E. Mansour,
Saudi J. Biol. Sci., | Journal Article
10.1016/j.sjbs.2022.02.053
Self Ahmad AlSayed Mohamad Omar
2022
Morphological and Molecular Characterization of Some Egyptian Six-Rowed Barley (Hordeum vulgare L.)
Azza H. Mohamed, Ahmad A. Omar, Ahmed M. Attya, Mohamed M. A. Elashtokhy, Ehab M. Zayed, Rehab M. Rizk
Plants | Journal Article
10.3390/plants10112527
Crossref
2021
Biallelic editing of the LOB1 promoter via CRISPR/Cas9 creates canker-resistant ‘duncan’ grapefruit.
Jia, H., A.A. Omar, V. Orbović and N. Wang,
Phytopathology®, | Journal Article
10.1094/PHYTO-04-21-0144-R
Self Ahmad AlSayed Mohamad Omar
2021
Impact of maternal vitamin D receptor (VDR) gene polymorphisms on spontaneous preterm birth (Egyptian case-control study).
El-Husseny, M., A.I. ElS, S.M. Eldeeb, H.S. Taha and A.A. Omar,
J. Med. Sci., | Journal Article
10.3923/jms.2021.9.16
Self Ahmad AlSayed Mohamad Omar
2021
Potential applications of biogenic selenium nanoparticles in alleviating biotic and abiotic stresses in plants: A comprehensive insight on the mechanistic approach and future perspectives.
Zohra, E., M. Ikram, A.A. Omar, M. Hussain and S.H. Satti et al.,
Green Process. Synth., | Journal Article
10.1515/gps-2021-0047
Self Ahmad AlSayed Mohamad Omar
2021
Melatonin Regulatory Mechanisms and Phylogenetic Analyses of Melatonin Biosynthesis Related Genes Extracted from Peanut under Salinity Stress
Abdelaleim I. ElSayed, Moncef Boulila, Mohammed S. Rafudeen, Azza H. Mohamed, Sonali Sengupta, Mostafa Rady, Ahmad A. Omar
Plants | Journal Article
10.3390/plants9070854
Crossref
2020
Metabolic Profiling of Hybrids Generated from Pummelo and Citrus latipes in Relation to Their Attraction to Diaphorina citri, the Vector of Huanglongbing
Nabil Killiny, Shelley E. Jones, Faraj Hijaz, Abdelaziz Kishk, Yulica Santos-Ortega, Yasser Nehela, Ahmad A. Omar, Qibin Yu, Fred G. Gmitter, Jude W. Grosser, Manjul Dutt
Metabolites | Journal Article
10.3390/metabo10120477
Crossref
2020
Evaluation of Lactobacillus kefiri and manganese peroxidase‐producing bacteria for decolorization of melanoidins and reduction of chemical oxygen demand.
Omar, A.A., S. Mahgoub, A. Salama, E. Likotrafiti, J. Rhoades, C. Christakis and P. Samaras,
Water Environ. J. | Journal Article
10.1111/wej.12663
Self Ahmad AlSayed Mohamad Omar
2020
Effect of milk thistle (Silybum marianum (L.) Gaertn) seed extract on bacterial Activities and growth of human liver cancer cells.
Ali, B.S.M., A.I. ElSayed, M.A. Doheem, A.M.A. Eita and A.A. Omar,
J. Biotechnol. Res., | Journal Article
10.32861/jbr.65.27.33
Self Ahmad AlSayed Mohamad Omar
2020
Investigating molecular evolutionary forces and phylogenetic relationships among melatonin precursor-encoding genes of different plant species.
Boulila, M., A.I.ElSayed, M.S. Rafudeen and A.A. Omar,
Mol. Biol. Rep., | Journal Article
10.1007/s11033-020-05249-1
Self Ahmad AlSayed Mohamad Omar
2020
Impact of dodder (Cuscuta spp.) infestation and gamma radiation on fahl ecotype of the Egyptian clover.
Omar, A.A., E.M. Zayed, M.F. El-Enany and G.A.A. El-Daem,
J. Applied Sci., | Journal Article
10.3923/jas.2020.14.25
Self Ahmad AlSayed Mohamad Omar
2020
The Impact of Drought Stress on Antioxidant Responses and Accumulation of Flavonolignans in Milk Thistle (Silybum marianum (L.) Gaertn)
Abdelaleim I. ElSayed, Mohamed A. M. El-hamahmy, Mohammed S. Rafudeen, Azza H. Mohamed, Ahmad A. Omar
Plants | Journal Article
10.3390/plants8120611
Crossref
2019
Enhanced resistance to citrus canker in transgenic mandarin expressing Xa21 from rice.
Omar, A.A., M.M. Murata, H.A. El-Shamy, J.H. Graham and J.W. Grosser,
Transgenic Res., | Journal Article
10.1007/s11248-018-0065-2
Self Ahmad AlSayed Mohamad Omar
2018
Molecular characterization of soybean (Glycine max L. Merr) genotypes tolerant and/or susceptible to cotton leaf worm (Spodoptera littoralis).
Omar, A.A., A.H. Mohamed, M.I. Nasr, K.A.H. El-Halafawy, E.A.K. Alabsawy, A.I. Hamdi and E.M. Zayed,
Am. J. Biochem. Mol. Biol., | Journal Article
10.3923/ajbmb.2018.34.47
Self Ahmad AlSayed Mohamad Omar
2018
Characterization of ORF0 and ORF1 and their roles in recombination and replication of sugarcane yellow leaf virus.
ElSayed, A.I., M. Boulila, D.C. Odero, A.A. Omar, A.M. Gomaa and R. Viswanathan,
Am. J. Biochem. Mol. Biol., | Journal Article
Self Ahmad AlSayed Mohamad Omar
2017
The effect of substituting milk fat by peanut oil on the quality of white soft cheese.
Khalifa, S.A., A.A. Omar and A.H. Mohamed,
Int. J. Dairy Sci., | Journal Article
10.3923/ijds.2017.28.40
Self Ahmad AlSayed Mohamad Omar
2017
Production of three new grapefruit cybrids with potential for improved citrus canker resistance.
Omar, A.A., M.M. Murata, Q. Yu, F.G. Gmitter Jr., C.D. Chase, J.H. Graham and J.W. Grosser,
<i>In Vitro</i> Cell. Dev. Biol.-Plant, | Journal Article
10.1007/s11627-017-9816-7
Self Ahmad AlSayed Mohamad Omar
2017
Metabolically speaking: Possible reasons behind the tolerance of `Sugar Belle` mandarin hybrid to huanglongbing.
Killiny, N., M.F. Valim, S.E. Jones, A.A. Omar, F. Hijaz, F.G. Gmitter and J.W. Grosser,
Plant Physiol. Biochem., | Journal Article
10.1016/j.plaphy.2017.05.001
Self Ahmad AlSayed Mohamad Omar
2017
Production of three new grapefruit like cybrids confirmed by plant mitochondrial intron, chloroplast and nuclear dna markers to improve citrus canker resistance.
Omar, A.A., M.M. Mayara, Q. Yu, F.G. Gmitter, C.D. Chase, J.H. Graham and J.W. Grosser,
In Vitro Cell. Dev. Biol. Anim., | Journal Article
Self Ahmad AlSayed Mohamad Omar
2016
Effect of some girdling treatments on fruiting behavior and physio-chemical properties of Washington navel orange trees.
Ibrahim, M.M., A.O. Mohamed, A.H. Mohamed and A.A. Omar,
J. Agric. Vet. Sci., | Journal Article
Self Ahmad AlSayed Mohamad Omar
2016
Somatic hybridization and cybridization via protoplast fusion technology for citrus improvement.
Omar, A.A., M. Murata, S. Altaf, C.D. Chase, J.H. Graham and J.W. Grosser,
In Vitro Cell. Dev. Biol. Plant, | Journal Article
Self Ahmad AlSayed Mohamad Omar
2015
Production of mandarin + Citrus latipes somatic hybrid citrus rootstocks with potential for improved tolerance/resistance to citrus greening.
Omar, A.A., S. Altaf, I.A. Khan and J.W. Grosser,
J. Citrus Pathol., | Journal Article
Self Ahmad AlSayed Mohamad Omar
2015
Genetic variations between two ecotypes of Egyptian clover by Inter-Simple Sequence Repeat (ISSR) techniques.
Zayed, E., M. Sayed and A. Omar,
Afr. J. Biotechnol., | Journal Article
10.5897/AJB2015.14609
Self Ahmad AlSayed Mohamad Omar
2015
Developmental regulation of the VvmybA1 transcriptional factor gene of grapevine (Vitisvinifera L.) to produce reporter gene expression free transgenic citrus.
Soriano, L., M. Dutt, B. Madalena, J. Mendes, A.A. Omar and J.W. Grosser,
In Vitro Cell. Dev. Bio. Anim., | Journal Article
Self Ahmad AlSayed Mohamad Omar
2014
Production of three new grapefruit cybrids to improve citrus canker resistance.
Omar, A.A., A. Satpute, M. Murata, C.D. Chase and J.W. Grosser,
Hortic. Sci., | Journal Article
Self Ahmad AlSayed Mohamad Omar
2014
Molecular characterization of transgenic W. Murcott (Nadorcott) mandarin produced using a protoplast-GFP transformation system.
Omar, A.A. and J.W. Grosser,
In Vitro Cell. Dev. Biol. Anim., | Journal Article
Self Ahmad AlSayed Mohamad Omar
2014
Salinity tolerance of Valencia orange trees on allotetraploid rootstocks.
Grosser, J.W., A.A. Omar, J.A. Gmitter and J.P. Syvertsen,
Proc. Florida State Hortic. Soc., | Journal Article
Self Ahmad AlSayed Mohamad Omar
2012
Progress Towards the Development of Transgenic Disease Resistance in Citrus.
Grosser, J.W., M. Dutt, A. Omar, V. Orbovic and G. Barthe,
ISHS Acta Hortic., | Journal Article
Self Ahmad AlSayed Mohamad Omar
2011
Multiple approaches for genetic engineering of citrus for disease and pest resistance.
Dutt, M., J.W. Grosser, A.A. Omar and G.A. Barthe,
Hortscience, | Journal Article
Self Ahmad AlSayed Mohamad Omar
2009
Zinc antagonizes glyphosate efficacy on yellow nutsedge (Cyperus esculentus).
Abouziena, H.F., R.A. Elmergawi, S. Sharma, A.A. Omar and M. Singh,
Weed Sci., | Journal Article
10.1614/WS-08-084.1
Self Ahmad AlSayed Mohamad Omar
2009
Efficacy comparison of some new natural-product herbicides for weed control at two growth stages.
Abouziena, H.F., A.A. Omar, S.D. Sharma and M. Singh,
Weed Technol., | Journal Article
10.1614/WT-08-185.1
Self Ahmad AlSayed Mohamad Omar
2009
Study of transgene expression by phloem specific promoter in transgenic citrus plant.
Omar, A.A., A.H. Mohamed and J.W. Grosser,
J. Biol. Chem. Environ. Sci., | Journal Article
Self Ahmad AlSayed Mohamad Omar
2009
Transformation and regeneration of transgenic `W. Murcott` (Nadorcott) mandarin using a protoplast-GFP transformation system.
Omar, A.A., M. Calovic, H.A. El-Shamy, H.J. An and J.W. Grosser,
Hortscience, | Journal Article
Self Ahmad AlSayed Mohamad Omar
2008
Phloem specific transgene expression driven by AtSUC2 gene promoter in transgenic citrus plants to develop citrus greening resistance.
Omar, A.A., M. Dutt, G. Barthe, V. Orbovic and J.W. Grosser,
<i>In vitro</i> Cell. Dev. Biol., | Journal Article
Self Ahmad AlSayed Mohamad Omar
2008
Combating huanglongbing and canker via genetic engineering of citrus.
Dutt, M., A.A. Omar, V. Orbovic, G. Barthe and J. Gmitter et al.,
Proc. Fla. State Hort. Soc., | Journal Article
Self Ahmad AlSayed Mohamad Omar
2008
Estimation of transgene copy Number in transformed citrus plants by quantitative multiplex Real-Time PCR.
Omar, A.A., M.G.H. Dekkers, J.H. Graham and J.W. Grosser,
Biotechnol. Progress, | Journal Article
10.1002/btpr.62
Self Ahmad AlSayed Mohamad Omar
2008
Comparison of endoplasmic reticulum targeted and non-targeted cytoplasmic GFP as a selectable marker in citrus protoplast transformation.
Omar, A.A. and J.W. Grosser,
Plant Sci., | Journal Article
10.1016/j.plantsci.2007.10.003
Self Ahmad AlSayed Mohamad Omar
2008
Evaluation of sowing in hills on ridges as a new technique for enhancement of wheat (Triticum aestivum L.) productivity.
Abouziena, H.F., E.R. El-Desoki, S. Sharma, A.A. Omar and M. Singh,
Egypt. J. Agron., | Journal Article
Self Ahmad AlSayed Mohamad Omar
2007
Protoplast/GFP transformation system: Comparison between endoplasmic reticulum targeting and non-targeting GFP in transgenic citrus.
Omar, A.A. and J.W. Grosser,
<I>In Vitro</I> Cell. Dev. Biol-Anim., | Journal Article
Self Ahmad AlSayed Mohamad Omar
2007
Introduction of Xα21, a Xanthomonas-resistance gene from rice, into 'Hamlin' sweet orange [Citrus sinensis (L.) Osbeck] using protoplast- GFP co-transformation or single plasmid transformation.
Omar, A.A., W.Y. Song and J.W. Grosser,
J. Hortic. Sci. Biotechnol., | Journal Article
Self Ahmad AlSayed Mohamad Omar
2007
Protoplast co-transformation and regeneration of transgenic Hamlin sweet orange plants containing a cDNA Xa21 Xanthomonas resistance gene and GFP.
Omar, A.A. and J.W. Grosser,
Acta Horticulture, | Journal Article
10.17660/ActaHortic.2007.738.23
Self Ahmad AlSayed Mohamad Omar
2007
Quantitative multiplex real-time PCR as a screening tool for estimating transgene copy number in transgenic citrus.
Omar, A.A., M.G.H. Dekkers, J.H. Graham and J.W. Grosser,
<I>In vitro</I> Cell. Dev. Biol. Anim., | Journal Article
Self Ahmad AlSayed Mohamad Omar
2006
Comparison between protoplast transformation and co-transformation in Hamlin sweet orange [Citrus sinensis (L.) osbeck].
Omar, A.A., W.Y. Song, J.H. Graham and J.W. Grosser,
Hortscience, | Journal Article
Self Ahmad AlSayed Mohamad Omar
2006
Transgenic Hamlin sweet orange plants containing a rice Xa21 cDNA gene obtained by protoplast/GFP transformation.
Omar, A.A. and J.W. Grosser,
<I>In Vitro</I> Cell. Dev. Biol-Anim., | Journal Article
Self Ahmad AlSayed Mohamad Omar
2005
Transfer of cDNA of the Xa21 Xanthomonas resistance gene from rice into Hamlin sweet orange (Citrus sinensis L. Osbeck) using a protoplast/GFP transformation system.
Omar, A.A. and J.W. Grosser,
<I>In vitro</I> Cell. Dev. Biol. Anim., | Journal Article
Self Ahmad AlSayed Mohamad Omar
2004