Talaat Ahmed

Talaat Ahmed
Qatar University · Environmental Science Center

Doctor of Philosophy

About

90
Publications
15,969
Reads
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651
Citations
Additional affiliations
November 2005 - March 2006
National Institute of Agrobiological Sciences
Position
  • Researcher
Description
  • Comparative genomics approach to the QTLs for Fusarium head blight (FHB) resistance in wheat.
November 2002 - November 2004
Chiba University
Position
  • PostDoc Position
Description
  • Development of PCR-based SNP markers for mapping cDNA derived from Soybean.
September 2001 - March 2002
Japan International Research Center for Agricultural Sciences
Position
  • Researcher
Description
  • QTL mapping of Type I and Type II resistance genes against Fusarium Head Blight (FHB) in tetraploid Wheat using SSR markers.
Education
September 1996 - October 2000
Yokohama City University
Field of study
  • Plant Molecular Genetics
February 1990 - February 1993
Assiut University
Field of study
  • Plant Breeding
October 1984 - June 1988
Assiut University
Field of study
  • Agronomy

Publications

Publications (90)
Article
Full-text available
This study was carried out to investigate the impacts of cyanobacteria (Roholtiella sp.) high-value product extract (HVPE) and water resuspended biomass WRB treatments on bell pepper production using the hydroponic system under greenhouse conditions. Six cyanobacteria treatments (6 ml L−1, 4 ml L−1, and 2 ml L−1 – HVPE, 6 ml L−1, 4 ml L−1, and 2 ml...
Article
Full-text available
Mango (Mangifera indica) is the second most internationally traded tropical fruit in the world. The fruit has high nutritional value. Its susceptibility to postharvest diseases and chill injuries increases its storage cost and put stress on exploring natural products that can increase its shelf-life. Our team has previously described Prosopis julif...
Article
Full-text available
Human population growth requires food production to increase at a matching pace. Crop productivity largely depends on GEM reciprocity and variation in any factor may potentially alter the overall response. Introduction of improved cultivars causes interactive responses within the farming system which may produce tangible benefits only in the presen...
Article
Full-text available
Alpine and polar regions are predicted to be among the most vulnerable to changes in temperature, precipitation, and nutrient availability. We carried out a seven-year factorial experiment with warming and nutrient addition in two alpine vegetation communities. We analyzed the relationship between fruit production and monthly mean, maximum, and min...
Preprint
Full-text available
Fungi play pivotal roles in ecosystem functioning, but little is known about their global patterns of diversity, endemicity, vulnerability to global change drivers and conservation priority areas. We applied the high-resolution PacBio sequencing technique to identify fungi based on a long DNA marker that revealed a high proportion of hitherto unkno...
Article
Full-text available
Salinity is one of the abiotic stresses that affect crop growth and productivity in arid and semi-arid regions. Unfortunately, there are few known methods to mitigate the deleterious impacts of salt stress on the development and yield of vegetable crops. Blue-green algae (cyanobacteria) are endowed with the potential to curb the negative impacts of...
Article
Full-text available
This study evaluated biosolid quality over time and the efficiency of using amounts (5 and 7 kg/m2) of municipal class A biosolids in Qatar to fertilize tomato plants (Solanum lycopersicum). Random samples were subjected to physical and chemical analysis, which revealed excellent particle uniformity and stability with minor odor defects. The analys...
Article
Full-text available
Salinity is the major constraint that decreases the yield and production of crops. Wheat has a significant value in agricultural food commodities. The germination and growth of wheat seedlings are a big challenge in salt-affected soils. The seed priming technique is used to mitigate salt stress and enhance the germination and growth of the crops. T...
Article
Full-text available
Qatar is largely characterized by a hyper-arid climate and low soil fertility which create a stressful soil environment for arbuscular mycorrhizal (AM) fungi. In a study of AM fungal communities and their relationship with soil chemical characteristics, we used a high-throughput sequencing technique to explore AM fungal diversity and community comp...
Conference Paper
A germination test of Vicia faba and Lens culinaris seeds under the effect of bleach and vinegar was conducted for seven days, and the observations were recorded daily. The completely randomized design (CRD) was used to examine the germination with three replicates at the lab conditions. Six germination parameters were measured, including germinati...
Conference Paper
The produced water from natural gas production process in the North field offshore is considered as the largest wastewater volume in Qatar, which could be potentially used for clean water resources for the industry as well as for some other domestic uses, if it is treated properly. This research aims to study the physical and chemical characterizat...
Conference Paper
Full-text available
Advancement in plant cell culture technology has permitted the increasing interest in harvesting plant metabolites from cell cultures. This technique is based on in vitro propagation of plant callus which contains many beneficial compounds under sterile conditions as the plant source or raw material for natural product extraction. In vitro producti...
Article
Natural extracted ingredients are evolutionarily selected molecules and are used to control inflammation, and cancerous progression and transformation. Several studies have evaluated the beneficial properties of certain pharmaceutical molecules extracted from Ficus carica (FC). The current study aimed to investigate the antioxidant and anticancer p...
Article
Full-text available
High levels of metal(oid)s in soil or food pose a severe health risk to humans. The potential toxicants find their way into the living systems via the food chain, following bioaccumulation in edible plants, including leafy vegetables grown in or irrigated with contaminated soil or water, respectively. The current study determines the levels of vana...
Article
Full-text available
Cyanobacteria are found to be renewable and sustainable additives for growth improvement in crops. Extracts and biomass of three nitrogen-fixing cyanobacteria namely, Roholtiella sp. (QUCCCM97), Nostoc ellipsosporum (QUCCCM99), and Desmonostoc danxiaense (QUCCCM112) isolated from Qatar desert environment were tested for their ability to enhance the...
Article
Full-text available
This study was conducted to evaluate the effect of three different rates of municipal biosolids produced in Qatar on plant characteristics and soil texture and its potential impacts on groundwater. Petunia atkinsiana, was used in this study. The experiment took place in a greenhouse in pots with soil mixed with 0, 3, 5, and 7 kg/m2 biosolids. Pelle...
Article
Full-text available
Sugarcane (Saccharum officinarum), a sugar crop commonly grown for sugar production all over the world, is susceptible to several insect pests attack in addition to bacterial, fungal and viral infections leading to substantial reductions in its yield. The complex genetic makeup and lack of resistant genes in genome of sugarcane have made the conven...
Article
Flavonoids are important natural bioactive compounds. Quantitation of total flavonoid content (TFC) is widely performed using the aluminum chloride colorimetric assay against a flavonoid standard assuming equal responses from all flavonoids. The aim of this work was to critically evaluate the assay employing spike recovery in plant extracts and thr...
Article
Full-text available
Scarcity of water and the small area of the agricultural land are considered as the crucial environmental issues challenged the Arabian Gulf countries. In this study, experiments were conducted to identify the salt tolerance during the germination and the seedling stages of some native halophytes in the State of Qatar. Seeds of eight native species...
Article
Full-text available
People are recently obsessed with excessive use of cleaning and disinfectants agents, particularly bleach and vinegar, before throwing residue into the drain and then into the groundwater, which is considered an essential source of drinking water and irrigation beside surface waters. A germination test of Vicia faba and Lens culinaris seeds under t...
Article
Full-text available
The arbuscular mycorrhizal (AM) fungi are a globally‐distributed group of soil organisms that play critical roles in ecosystem function. However, the ecological niches of individual AM fungal taxa are poorly understood. We collected >300 soil samples from natural ecosystems worldwide and modelled the realized niches of AM fungal virtual taxa (VT; a...
Preprint
Qatar is largely characterized by a hyper-arid climate and low soil fertility, which combine to create a stressful soil environment for arbuscular mycorrhizal (AM) fungi. Here we present a study on AM fungi communities and their relationship to soil chemical characteristics. We used high-throughput seqeuncing technique for identifying AM fungal div...
Conference Paper
A broad diversity of microorganisms can be found in soil, where they are essential for nutrient cycling and energy transfer. Recent high-throughput sequencing methods have greatly advanced our knowledge about how soil, climate and vegetation variables structure the composition of microbial communities in many world regions. However, we are lacking...
Conference Paper
Given the vast expanse of Qatar’s dryland ecosystems, agricultural productivity and soil stability is highly dependent on the diversity of soil microbiota. The soil environment is a heterogeneous habitat shaped by various components like chemical (organic matter, salinity and nutrients) and biological (fungal diversity and vegetation) properties th...
Conference Paper
Salinity is considered as major environmental challenge that affects crop growth and productivity. This study investigated the application of Haodule univervis seagrass liquid extract on bell pepper (Capsicum annuum L.) under salt stress conditions. The salinity treatments were applied by irrigating bell pepper plants with 0, 50, 100, 150, and 200...
Data
Recently, because of the COVID-19 pandemic, especially such a pandemic may recur in the future, people are obsessed with excessive use of disinfectants, particularly the sodium hypochlorite bleach and vinegar before it ended up throwing residue into the sewer and then into the groundwater, which considered as an essential source of drinking water a...
Data
ecently, because of the COVID-19 pandemic, especially such a pandemic may recur in the future, people are obsessed with excessive use of disinfectants, particularly the sodium hypochlorite bleach and vinegar before it ended up throwing residue into the sewer and then into the groundwater, which considered as an essential source of drinking water an...
Article
Full-text available
This study attempted to use produced water (PW) to irrigate turfgrass species, Cynodon dactylon and Paspalum sp. Assessment on established grasses, heavy metal accumulation and germination tests for weeds and turf grass seeds were conducted to evaluate the impact of PW irrigation. C. dactylon depicted lower tolerance while Paspalum sp. showed bette...
Article
Full-text available
Fungal diseases are considered a major threat to plant growth and productivity. However, some beneficial fungi growing in the same environment protect plants from various pathogens, either by secreting antifungal metabolites or by stimulating the host immune defense mechanism. Date palms are susceptible to several fungal pathogens. Nevertheless, in...
Article
Full-text available
At different stages throughout their life cycle, plants often encounter several pathogenic microbes that challenge plant growth and development. The sophisticated innate plant immune system prevents the growth of harmful microbes via two interconnected defense strategies based on pathogen perception. These strategies involve microbe-associated mole...
Data
Please cite this article as: T.A. Ahmed, A.A. Elezz, N.H. Al-Sayed, Dataset of allelopathic effects of Casuarina equisetifolia-L leaf aquatic extract on seed germination and growth of selected plant crops, Data in Brief, https://doi.
Article
Full-text available
In agricultural fields that are surrounded by dunes, the Casuarina tree is usually used as windbreaks. In addition, it plays a significant role in inhibiting nearby vegetation growth. In this dataset, the effect of Casuarina equisetifolia-L leaf aquatic extract on seed germination and growth of four selected plant crops (Maize, Lentil, Mustard, and...
Article
In this study, the physical and chemical characterization of produced water was done followed by treatment through sand filtration coupled with activated carbon microemulsion modified activated carbon techniques. The results of characterization showed that the produced water had high chemical oxygen demand (COD), and total organic carbon (TOC) valu...
Article
Full-text available
In this study, the phytotoxic effects caused by the exposure to five different concentrations of two veterinary antibiotics (Tylosin, and Enrofloxacin) that are commonly used for the treatment of farm animals as antibacterial agents were considered. The impact of antibiotic residues was evaluated on the germination percentage, accumulation, and see...
Poster
This study describes a micropropagation protocol of Lycium shawii through tissue culture techniques.
Article
Full-text available
Natural antimicrobial peptides have been shown as one of the important tools to combat certain pathogens and play important role as a part of innate immune system in plants and, also adaptive immunity in animals. Defensin is one of the antimicrobial peptides with a diverse nature of mechanism against different pathogens like viruses, bacteria and f...
Article
Toads are likely to have been introduced to Qatar, but little information is available on toad populations in the country, including the species present and their probable origin. Therefore, we collected tissue samples for analysis from 32 toads found in six different locations in northern and central Qatar. Phylogenetic analysis based on16S rRNA m...
Article
Full-text available
Bacillus thuringiensis (Bt) based insecticidal formulations have been recognized as one of the most successful, environmentally safe and sustainable method of controlling insect pests. Research teams worldwide are in search of Bt diversity giving more choices of bio-insecticides and alternatives to address insect resistance. In fact, there are many...
Conference Paper
Background A range of natural factors, invasive animals and human activity have been severely affecting stability of the ecosystem, resulting in the annihilation of plants habitats and so plant endangerment or even extinction. In Qatar, urgent action needs to be taken to stop decline of desert plant species as well as an effective strategy should b...
Article
The current study examines pollutant removal efficiency from the produced water of a local petroleum industry by five different local microalgae species. The five microalgae strains Monoraphidium, Chlorella, Neochloris, Scenedesmus, Dictyosphaerium, Chlorella and Dictyosphaerium species showed a significant amount of biomass generation within all d...
Conference Paper
The Influences of Produced Water Irrigation on Soil microbial succession and Turfgrass Grass Establishment in Qatar Sameera S. Shaikh, Mohammed H. Abu-Dieyeh*, Fatima A. Al Naemi, Talaat Ahmed, and Mohammad A. Alghouti Department of Biological and Environmental Sciences, College of Arts and Sciences, Qatar University. *Corresponding author: dandeli...
Article
Full-text available
Nutritional requirements of the most widely used bacterium, P. aeruginosa , was shown to be necessary to predict in advance to prevent failure of oil hydrocarbon bioremediation due to weathering processes.
Article
Full-text available
Qatar is a country with no surface water supplies while the groundwater is saline and unusable for many crops. However, there is ample supply of seawater, treated wastewater and industrial water. In the present study, four types of irrigation water: groundwater (GW) (EC ≈ 2.00 dSm-1), treated wastewater, diluted seawater of electrical conductivity...
Article
Full-text available
Glossonema edule, a synonym of Glossonema varians, is an important but endangered desert plant in Qatar. Propagation of G. edule is important to maintain plant biodiversity in the desert. The objective of this study is to investigate the seed dormancy breakage and to establish and optimize a micropropagation protocol to conserve this endangered pla...
Article
Full-text available
Qatar is facing a great challenge to meet the demand for water and the management of its limited water resources. Therefore, using other alternative water resources such as high salinity groundwater in agriculture came up. The synthetic zeolite, manufactured from coal ash, is rich of Ca and/or K. Zeolite powder was mixed with soil at the rates of 2...
Article
The occurrence of chlorine dioxide (ClO2) disinfection by-products (DBPs) in drinking water, namely, chlorite, chlorate, and trihalomethanes (THMs), was investigated. Two-hundred-ninety-four drinking water samples were collected from seven desalination plants (DPs), four reservoirs (R), and eight mosques (M) distributed within various locations in...
Article
Casuarina equisetifolia L. is a widespread tree that has been known for its allelopathic potential causing biological inhibition on plant seed germination. Leaf extract of Casuarina equisetifolia L. was evaluated for its allelopathic influence on various plant crops. Laboratory and field experiments were conducted to study its allelopathic effects...
Article
Full-text available
The study aimed to examine the residues of organochlorines pesticides (OCPs) in vegetables and fruits in Qatar. A total of 127 samples was studied. Ninety percent of the imported samples recorded residues above the maximum residue levels (MRLs). The most frequently detected OCP in the samples was heptachlor (found in 75 samples). In the comparisons...
Conference Paper
The main objective is to contribute via this study, in solving an environmental issue and helping Qatar in finding suitable water resources; useful in agriculture. Qatar faces diverse water challenges; the number one that threats here is scarcity as water is not renewable. Due to scarcity of good quality water, reusing of low quality and contaminat...
Conference Paper
Fresh fruit and vegetables are an important part of a healthy diet as they are a significant source of vitamins and minerals. However, fresh fruits and vegetables can also be a source of toxic substances such as pesticides. Pesticides are a several and diverse group of chemical compounds, which applied to crops at various stages of cultivation and...
Conference Paper
Full-text available
Background: Ceratocystis radicicola is a soil-borne pathogen (Wingfield et al, 1993) causing sudden death of date palm (Phoenix dactylifera) in USA and South Africa (Bliss, 1941; Lind & Smit, 1999). It also has been reported to be associated with date palm in Qatar causing black scorch disease (Al-Naemi et al., 2014). Environmental factors such as...
Conference Paper
Introduction: Of the various devastating diseases triggered by necrotrophic fungi, the diseases caused by following fungi Fusarium oxysporum, Fusarium solani and Rhizectonia solani are of particular economic significance in date palm (Phoenix dactylifera L.) growing countries. Undoubtedly date palm is the most important fruit tree cultivated in Ara...
Conference Paper
Introduction: Pathogen attacks impose natural selection on plants to evolve complex arrays of defensive strategies. Among the diverse defensive mechanisms evolved by plants to withstand pathogen attack, the ability to synthesize an arsenal of low-molecular weight volatile and non-volatile chemicals including phenolics helps them to prepare a robust...
Article
Date palm is an important subsistence crop in arid regions due to its ability to grow under adverse environmental conditions such as high temperature, salinity and drought. Nevertheless, ideal conditions for its growth and production are also favorable to fungal diseases such as black scorch disease caused by Ceratocystis radicicola. The aim of thi...
Chapter
Full-text available
Abstract Qatar ranks as the 16 largest date-producing country in the world. There are 581,336 date palm trees growing in an area of 2,469 ha with date production of 21,491 mt as of 2010. It is the major fruit tree grown in the country, and date production is 7.2 % of the total agricultural production. No specialized institution exists for date palm...
Article
The oil content of saturated and unsaturated fatty acids with some physico-chemical properties and nutrients were investigated in oil produced from seeds of six important date palm cultivars and one seed strain present in Saudi Arabia. The results indicated that the oil extracted from six seed cultivars of date palm ranged from 6.73-10.89% w/w oil....
Article
Full-text available
October 2014, Volume 98, Number 10 Page 1437 http://dx.doi.org/10.1094/PDIS-04-14-0424-PDN Disease Notes First Report of Thielaviopsis punctulata Causing Black Scorch Disease on Date Palm in Qatar F. A. Al-Naemi, R. Nishad, and T. A. Ahmed, Department of Biological and Environmental Sciences, College of Arts and Sciences, Qatar University, Doha...
Conference Paper
To study the genetic diversity among date palm cultivars grown in Qatar, fifteen Date palm samples were collected from Qatar University Experimental Farm. DNAs were extracted from fresh leaves by using commercial DNeasy Plant System Kit (Qiagen, Inc., Valencia, CA). Total of 18 (Inter Simple Sequence Repeat) ISSR single primers were used to amplify...