Noran A Al-Ansary | Cairo University (original) (raw)
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Papers by Noran A Al-Ansary
Agriculture research has a strong emphasis on biotic and abiotic stresses because of the signific... more Agriculture research has a strong emphasis on biotic and abiotic stresses because of the significant economic losses to cash crops. Since plant stress has an impact on crop quality and yield, every effort must be made to identify and treat the problem of plant stress. Geographic Information Systems (GIS) and remote sensing are a new innovative alternative to the conventional diagnosis, detection and management of diseases by spectral symptoms. The production of crops, including crop protection, can benefit greatly from this contemporary technology. Utilizing data from GIS and remote sensing, disease-affected plants may be identified by the variation in their reflectance spectra when compared to healthy plants. GIS has been widely utilized as a significant instrument for epidemiological research. Remote sensing is a rapid and effective technology that may gather information on the spectral characteristics of earth surfaces from a variety of locations, including satellites and other platforms. The most recent studies are based on the information from spectral. multispectral, and hyperspectral sensors that measure reflectance, fluorescence, and radiation emission, or from electronic noses that detect volatile organic compounds released from plants or pathogens. These sensors may also have the ability to characterize the health status of crops. Agriculture will become more sustainable and safer using GIS and remote sensing technologies, which will also considerably aid to greatly specialize diagnostic and management outcomes. These technologies will eventually become a key piece of a farmer's precision equipment mix, working in tandem with advancements in digitalization and artificial intelligence for precision application across pathogens and crop management demands.
International Journal of Agricultural Technology, 2023
Thyme, citral, methyl anthranilate, rosemary and clove essential oils were tested for their antif... more Thyme, citral, methyl anthranilate, rosemary and clove essential oils were tested for their antifungal activity to investigate the possibility of their use for maize crop treatment to control seed-borne fungi associated to maize grains as Fusarium verticillioides, Aspergillus flavus, Aspergillus niger, Aspergillus terreus, Talaromyces verruculosus and other species. The efficacy of the five essential oils against natural fungal mycoflora developed on maize crop under naturally infected field conditions at two experiment trials at three storage intervals on two different media. The percentage of seed germination, the percentage of infection and isolation frequency were reported. The five Eos had a significant inhibitory effect against maize grain germination and fungal frequency. Thyme had the least impact on the germination of maize grains, while clove had an obvious effect in reducing the total frequency of fungal isolates associated to maize grains. The five Eos had an obvious inhibitory activity against the frequency of fungal isolates associated with maize grains. These findings imply that EOs, particularly thyme and clove oils, are effective at controlling maize seed-borne fungi.
International Journal of Agricultural Technology, 2022
Mycotoxin-producing moulds which considered as common maize grains contaminants are presented in ... more Mycotoxin-producing moulds which considered as common maize grains contaminants are presented in the genera Fusarium, Aspergillus and Penicillium. One of the natural and safe ways to protect grains from mould contamination is the use of essential oils. The antifungal activity of thyme, citral, methyl anthranilate, rosemary and clove, essential oils (EOs) against Fusarium. moniliforme, Aspergillus niger, Penicillium sp., Aspergillus flavus and Aspergillus terreus was evaluated in direct contact assay. All EOs showed significant impact on mycelial growth and spore germination inhibition. Thyme showed the best inhibitory effect while, methyl anthranilate and rosemary were the most effective EOs for spore germination inhibition. The effect of EOs added to grains in different application methods (volatile and carrier contact assays) were evaluated. In volatile assay, frequency of F. moniliforme and A. niger isolated from maize grains was greatly inhibited by rosemary, P. sp. was most affected by methyl anthranilate, and A. flavus growth reduced by thyme. On the other hand, frequency of F. moniliforme and Penicillium. sp. were greatly inhibited by the clove at EC50 =4.5009 and EC90 =6.9351mg/mL, while A. niger was most affected by citral as well as rosemary and methyl anthranilate leaded to the major frequency reduction of A. flavus. Our results cleared that vapor contact assay had stronger antifungal activity as a post-harvest treatment than carrier contact assay. These results suggested that fungi can be controlled by EOs, especially clove and thyme oils.
Journal of Chemical and Pharmaceutical Research, 2015
Biological intervention can range from application of biological products to enhance the resistan... more Biological intervention can range from application of biological products to enhance the resistant of crops to control plant pathogens. Isolates of Paeniobacillus polymyxa, Brevibacillus brevis, Pseudomonas putida, Pseudomonas fluorescens and Streptomyces griseus were evaluated to enhance resistance against die back disease caused by Botryoplodia theobromae on grapevine transplanting inoculated with pathogen and sprayed with bioagents in the greenhouse experiment. P. putida was the highest effective treatment followed by P. polymyxa and Brevibacillus brevis respectively.
Advances in Bioscience and Biotechnology, 2013
The export oriented agricultural and horticultural crops depends on the export of residue free ... more The export oriented agricultural and horticultural
crops depends on the export of residue free produce
and has created a great potential and demand for the
incorporation of biopesticides in crop protection.
PGPR with wide scope for commercialization inclu-
des Pseudomonas putida. Pseudomonas putida was
effective in reducing die back caused by a fungus Bot-
ryodiplodia theobromae and phomopsis or arm death,
caused by a fungus, Phomopsis viticola of grapevine in
vitro and in vivo. Pseudomonas putida showed opti-
mum Siderophore pseudobactin production at 72 h,
and growth peak at 120 h. glycerol as a source of
carbon and yeast as a source of nitrogen Pseudomo-
nas putida was formulated using polysaccharide dex-
tran starch, which led to the elongation of conserva-
tion and the effectiveness of the biofungicide. Pseu-
domonas putida was very effective as biocontrol agents
to reduce the die back and phomopsis diseases on
grapevine. The obtained results showed that both
bacterial treatments significantly increased the growth
parameters as well as fruits dry weights and yield of
grapevine.
Agriculture research has a strong emphasis on biotic and abiotic stresses because of the signific... more Agriculture research has a strong emphasis on biotic and abiotic stresses because of the significant economic losses to cash crops. Since plant stress has an impact on crop quality and yield, every effort must be made to identify and treat the problem of plant stress. Geographic Information Systems (GIS) and remote sensing are a new innovative alternative to the conventional diagnosis, detection and management of diseases by spectral symptoms. The production of crops, including crop protection, can benefit greatly from this contemporary technology. Utilizing data from GIS and remote sensing, disease-affected plants may be identified by the variation in their reflectance spectra when compared to healthy plants. GIS has been widely utilized as a significant instrument for epidemiological research. Remote sensing is a rapid and effective technology that may gather information on the spectral characteristics of earth surfaces from a variety of locations, including satellites and other platforms. The most recent studies are based on the information from spectral. multispectral, and hyperspectral sensors that measure reflectance, fluorescence, and radiation emission, or from electronic noses that detect volatile organic compounds released from plants or pathogens. These sensors may also have the ability to characterize the health status of crops. Agriculture will become more sustainable and safer using GIS and remote sensing technologies, which will also considerably aid to greatly specialize diagnostic and management outcomes. These technologies will eventually become a key piece of a farmer's precision equipment mix, working in tandem with advancements in digitalization and artificial intelligence for precision application across pathogens and crop management demands.
International Journal of Agricultural Technology, 2023
Thyme, citral, methyl anthranilate, rosemary and clove essential oils were tested for their antif... more Thyme, citral, methyl anthranilate, rosemary and clove essential oils were tested for their antifungal activity to investigate the possibility of their use for maize crop treatment to control seed-borne fungi associated to maize grains as Fusarium verticillioides, Aspergillus flavus, Aspergillus niger, Aspergillus terreus, Talaromyces verruculosus and other species. The efficacy of the five essential oils against natural fungal mycoflora developed on maize crop under naturally infected field conditions at two experiment trials at three storage intervals on two different media. The percentage of seed germination, the percentage of infection and isolation frequency were reported. The five Eos had a significant inhibitory effect against maize grain germination and fungal frequency. Thyme had the least impact on the germination of maize grains, while clove had an obvious effect in reducing the total frequency of fungal isolates associated to maize grains. The five Eos had an obvious inhibitory activity against the frequency of fungal isolates associated with maize grains. These findings imply that EOs, particularly thyme and clove oils, are effective at controlling maize seed-borne fungi.
International Journal of Agricultural Technology, 2022
Mycotoxin-producing moulds which considered as common maize grains contaminants are presented in ... more Mycotoxin-producing moulds which considered as common maize grains contaminants are presented in the genera Fusarium, Aspergillus and Penicillium. One of the natural and safe ways to protect grains from mould contamination is the use of essential oils. The antifungal activity of thyme, citral, methyl anthranilate, rosemary and clove, essential oils (EOs) against Fusarium. moniliforme, Aspergillus niger, Penicillium sp., Aspergillus flavus and Aspergillus terreus was evaluated in direct contact assay. All EOs showed significant impact on mycelial growth and spore germination inhibition. Thyme showed the best inhibitory effect while, methyl anthranilate and rosemary were the most effective EOs for spore germination inhibition. The effect of EOs added to grains in different application methods (volatile and carrier contact assays) were evaluated. In volatile assay, frequency of F. moniliforme and A. niger isolated from maize grains was greatly inhibited by rosemary, P. sp. was most affected by methyl anthranilate, and A. flavus growth reduced by thyme. On the other hand, frequency of F. moniliforme and Penicillium. sp. were greatly inhibited by the clove at EC50 =4.5009 and EC90 =6.9351mg/mL, while A. niger was most affected by citral as well as rosemary and methyl anthranilate leaded to the major frequency reduction of A. flavus. Our results cleared that vapor contact assay had stronger antifungal activity as a post-harvest treatment than carrier contact assay. These results suggested that fungi can be controlled by EOs, especially clove and thyme oils.
Journal of Chemical and Pharmaceutical Research, 2015
Biological intervention can range from application of biological products to enhance the resistan... more Biological intervention can range from application of biological products to enhance the resistant of crops to control plant pathogens. Isolates of Paeniobacillus polymyxa, Brevibacillus brevis, Pseudomonas putida, Pseudomonas fluorescens and Streptomyces griseus were evaluated to enhance resistance against die back disease caused by Botryoplodia theobromae on grapevine transplanting inoculated with pathogen and sprayed with bioagents in the greenhouse experiment. P. putida was the highest effective treatment followed by P. polymyxa and Brevibacillus brevis respectively.
Advances in Bioscience and Biotechnology, 2013
The export oriented agricultural and horticultural crops depends on the export of residue free ... more The export oriented agricultural and horticultural
crops depends on the export of residue free produce
and has created a great potential and demand for the
incorporation of biopesticides in crop protection.
PGPR with wide scope for commercialization inclu-
des Pseudomonas putida. Pseudomonas putida was
effective in reducing die back caused by a fungus Bot-
ryodiplodia theobromae and phomopsis or arm death,
caused by a fungus, Phomopsis viticola of grapevine in
vitro and in vivo. Pseudomonas putida showed opti-
mum Siderophore pseudobactin production at 72 h,
and growth peak at 120 h. glycerol as a source of
carbon and yeast as a source of nitrogen Pseudomo-
nas putida was formulated using polysaccharide dex-
tran starch, which led to the elongation of conserva-
tion and the effectiveness of the biofungicide. Pseu-
domonas putida was very effective as biocontrol agents
to reduce the die back and phomopsis diseases on
grapevine. The obtained results showed that both
bacterial treatments significantly increased the growth
parameters as well as fruits dry weights and yield of
grapevine.