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Showing 1 to 20 of 29 for “"Phytoalexin"”.
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Environmental Stress and Phytoalexin Accumulation in Soybean
Made available in DSpace on 2014-12-14T04:37:46Z (GMT). No. of bitstreams: 1 8004237.pdf: 3778918 bytes, checksum: 15438b3320c050aacf47bef58202913d (MD5) Previous issue date: 1979
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Isolation and identification of a phytoalexin from sugarcane
… sugarcane and suggested that the compound was a phytoalexin. However, the role of this compound was not unambiguously established. This study was undertaken to determine whether sugarcane produces phytoalexins of other chemical classes.
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Resistance of Soybeans to Three Phytophthora Species Due to the Production of a Phytoalexin
Made available in DSpace on 2014-12-05T20:30:15Z (GMT). No. of bitstreams: 1 6303279.pdf: 1805856 bytes, checksum: bb17b7d5f273dead8768dddcb3f95dd7 (MD5) Previous issue date: 1962
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Evaluation of southern African maize germplasm for phytoalexin accumulation following inoculation by Fusarium verticillioides
… humans and animals. Maize produces terpenoid phytoalexins, which are antimicrobial compounds that directly reduce the growth of many fungal pathogens including F. verticillioides. Two families of maize phytoalexins, termed kauralexins and zealexins, have been characterized. Key genes …
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An Inducer of Soybean Phytoalexin and Its Role in the Resistance of Soybeans to Phytophthora Rot
Made available in DSpace on 2014-12-10T23:32:41Z (GMT). No. of bitstreams: 1 7114748.pdf: 591731 bytes, checksum: 5356444849e3dad803a4cd23957a7e19 (MD5) Previous issue date: 1970
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Characterisation of phytoalexin accumulation in maize inoculated with Cercospora zeina, the causal organism of grey leaf spot disease
… where maize is grown as a staple food source. Phytoalexins are low molecular weight anti-microbial bio-chemicals that are synthesised in planta in response to biotic stress. Related studies have characterised many phytoalexins produced in various plants against several diseases. In maize, …
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Some Physiological Aspects Of The Soybean - Phytophthora Megasperma F Sp Glycinea Interaction, With Special Reference To The Phytoalexin, Glyceollin
… of cv. Harosoy became resistant with age. The phytoalexins, glyceollin isomers I, II and III, accumulated rapidly in resistant responses. Proportions of the glyceollin isomers varied with the organ, exposure to light, interaction type and incubation period. The three isomers, also differed in …
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Role of Subcellular Differentiation in Plant Disease Resistance
… endproducts of the pathway are sesquiterpenoid phytoalexins, antibiotic compounds produced by plants in response to pathogens. We are interested in the role of the defense-inducible isoforms of HMGR in phytoalexin production and disease resistance. Transgenic tobacco, constitutively expressing …
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Molecular insights into arabidopsis response to Myzus persicae sulzer (green peach aphid)
… studies suggest that the Arabidopsis PAD4 (PHYTOALEXIN DEFICIENT 4) gene modulates the GPA feeding-induced senescence process. Furthermore, in comparison to the wild type plants, GPA growth was higher on pad4 mutant plants, suggesting an important role for PAD4 in plant defense against GPA. …
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IDENTIFICATIN AND CHARACTERIZATION OF PATHOGENICITY GENES IN FUSARIUM VIRGULIFORME, THE CAUSAL AGENET OF SUDDEN DEATH SYNDROME (SDS) IN SOYBEAN
… virguliforme</italic> in the presence of soybean phytoalexin, glyceollin. The <italic>Fvgrx2</italic> gene, a <italic>Saccharomyces cerevisiae grx2</italic>homologue, was selected for further analysis. This study demonstrates for the first time the identification and characterization of dithiol …
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Approaches towards disease resistance to filamentous pathogens
… receptors. This work examines the use of the phytoalexin capsidiol and synthetic NLR immune receptors as disease resistance approaches against oomycete and fungal plant pathogens. The production of phytoalexins constitutes an important aspect of plant defence. Capsidiol, a pepper phytoalexin, …
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Synthesis of Ester Derivatives of Resveratrol as Potential Anti-Cancer Drugs
<p>Resveratrol is a naturally occurring phytoalexin of the stilbene family produced by various plants in response to stress, UV radiation, and fungal attack. It is primarily found in peanuts, berries, grape skin, and red wine. Resveratrol has been found to exhibit anti-cancer, anti-inflammatory, …
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Synthesis of Resveratrol and Its Analogs, Phase-Transfer Catalyzed Asymmetric Glycolate Aldol Reaction, and Total Synthesis of 8,9-Methylamido-Geldanamycin
The phytoalexin resveratrol and its acetyl analogs have been made using a decarbonylative Heck reaction. The acid chloride derived from 3,5-dihydroxybenzoic acid was coupled with suitable protected 4-hydroxystyrene in the presence of palladium acetate and N,N-bis-(2,6-diisopropylphenyl)-4,5-dihydro …
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Biotransformation of the Phytoalexins Brassinin, Brassilexin and Camalexin by Alternaria brassicicola
… of the transformation of the crucifer phytoalexins brassinin, brassilexin and camalexin by the phytopathogenic fungus Alternaria brassicicola was carried out. The objectives of this study included: 1) the isolation and characterization of the metabolites of biotransformation of …
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Synthesis of Resveratrol Esters and Aliphatic Acids.
<p>Resveratrol (RV) is a naturally occurring phytoalexin of the stilbenoid family produced by some plant species, and present in grape skin, peanuts, and red wine. It has been found to exhibit anti-cancer, anti-inflammatory, anti-viral, anti-aging, cardio protective, and anti-oxidant properties. …
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Characterisation of a maize mutant deficient in antifungal kauralexin accumulation
… fungal pathogens of maize in Southern Africa. Phytoalexins are low molecular weight anti-microbial compounds produced in plants in response to pathogen infection. In maize, two classes of non-volatile terpenoid phytoalexins, viz. kauralexins and zealexins, play a role in fungal resistance. It …
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Sclerotinia sclerotiorum : phytotoxins and metabolism of phytoalexins
… pathways used by S. sclerotiorum to detoxify phytoalexins produced by host plants. As well, the potential production of phytotoxins and cytotoxic compounds by S. sclerotiorum was analyzed. The metabolite sclerin was isolated from cultures of S. sclerotiorum and its phytotoxicity to crucifers …
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Poly(A) Polymerase 1 (PAPS1) influences organ size and pathogen response in Arabidopsis thaliana
… of ENHANCED DISEASE SUSCEPTIBILITY1 (EDS1)/PHYTOALEXIN DEFICIENT4 (PAD4). Immune responses are accompanied by intracellular redox changes. Consistent with this, the redox-status of the chloroplast is altered in paps1-1 mutants. The molecular effects of the paps1-1 mutation were analysed …
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Genes and mechanisms in Arabidopsis innate immunity against Leptosphaeria maculans
… of the mechanisms required for resistance. The phytoalexin camalexin was first identified as a quantitative resistance factor; whereas accelerated cell death mutants enabled the pathogen to circumvent the resistance mechanisms by switching to a necrotrophic mode of growth. In addition to this, …
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Effects of Natural Antioxidants on Motor and Cognitive Deficits in an Animal Model of Aging and Obesity and Dopaminergic-Like SH-SY5Y Cell Line
… the diet of middle-aged mice with resveratrol, a phytoalexin found in grapes, peanuts, wild blueberry and red wine. Resveratrol is known for its antioxidant, anti-inflammatory, anti-cancer properties and is also shown to be neuroprotective. During the course of our study, an unexpected confounding …
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