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Showing 1 to 17 of 17 for “"phytoalexins"”.
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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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Investigation of cytochrome P450s in the biosynthesis of rice phytoalexins
… has evolved a set of metabolites known as phytoalexins in response to biotic and abiotic stress factors. The rice phytoalexins almost invariably belong to the labdane-related diterpenoid (LRD) superfamily. The phytoalexins identified in rice thus far are momilactones A-E, phytocassanes A-F, …
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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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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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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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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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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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Isolation and identification of a phytoalexin from sugarcane
… to determine whether sugarcane produces phytoalexins of other chemical classes.
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Synthesis of a Water Soluble Resveratrol Derivative as a Potential Anti-Cancer Drug.
… chemistry. Resveratrol (Res) is one of the many phytoalexins producing stilbenoids present in several medicinal plants, grape skin, peanuts, and red wine. It has been found to exhibit anti-cancer, anti-inflammatory, and anti-oxidant properties. Water solubility and bioavailability are some of the …
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Dual-omics approach for 3,4-dihydroisocoumarin characterisation from Hydrangea serrata and isolation of polyketide synthases for heterologous expression in Pseudomonas putida KT2440
… like in cases of phenylpropanoid derived phytoalexins. This work includes the treatment of H. serrata Oamacha with different stressors, yeast-elicitor, jasmonic acid, aluminium chloride or drought. None of the applied stressors enhanced the hydrangenol or phyllodulcin accumulation in …
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Investigating the evolution of cytochromes P450 involved in GA biosynthesis
… range of such natural products as antibiotic phytoalexins or allelochemicals. While rice contains several kaurene oxidase homologs, only OsKO2 (CYP701A6) is required for gibberellin biosynthesis. Here, we demonstrate that the KO from Arabidopsis thaliana (CYP701A3 or AtKO) exhibits …
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Approaches towards disease resistance to filamentous pathogens
… and fungal plant pathogens. The production of phytoalexins constitutes an important aspect of plant defence. Capsidiol, a pepper phytoalexin, differentially inhibits the growth of two Phytophthora species, the late-blight pathogen P. infestans and the vegetable pathogen P. capsici. The …
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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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Transkriptomanalyse der <i>Arabidopsis</i>-Wurzel nach Infektion mit dem pilzlichen Pathogen <i>Verticillium longisporum</i> und Identifizierung von transkriptionellen Regulatoren der Pathogenantwort
… gezeigt.Besonders Biosynthese-Gene des Phytoalexins Camalexin sind in V. longisporum-infizierten Wurzeln transkriptionell induziert. Auch biochemisch konnte in infiziertem Wurzelgewebe eine Camalexin-Akkumulation nachgewiesen werden. In Untersuchungen der Camalexin-Biosynthese-Mutanten …
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Study and Manipulation of the Salicylic Acid-Dependent Defense Pathway in Plants Parasitized by Orobanche aegyptiaca Pers.
… production of phenylpropanoid and isoprenoid phytoalexins. However, the gene for the pathogenesis-related (PR) protein, PR-1a, was not induced by parasitism in tobacco. Expression of PR-1a is correlated with the salicylic acid (SA)-mediated defense pathway that leads to systemic acquired …
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Elicitoren der Duftstoffemission von Rainfarnpflanzen
… auslöst, induziert in ihr die Synthese des Phytoalexins Glyceollin I, das fungizid wirkt. In den Zellmembranen von Glycine max Keimblättern gibt es ein Bindungs-Protein, an das das Hepta-beta-D-glucosid spezifisch mit hoher Aktivität bindet und eine rezeptorvermittelte Signaltransduktion …
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Characterization and Application of Peanut Root Extracts
Lipid oxidation is one of the leading causes of food quality degradation. Manufacturers typically add antioxidants or purge a product's package of oxygen to inhibit oxidation and the resulting off-flavors. Synthetic antioxidants (e.g. BHT, BHA) and some natural antioxidants (e.g. α-tocopherol) have …