| phytophthora himalsilva sp. nov. an unusually phenotypically variable species from a remote forest in nepal. | the himalaya have received little investigation for phytophthora species. in a remote forest in western nepal ten isolates of an unknown phytophthora were recovered from the rhizosphere of quercus, castanopsis, carpinus and cupressus spp. the phytophthora, formally named here as a p. himalsilva sp. nov., is homothallic with either amphigynous or paragynous antheridia and papillate, highly variable sporangia which may also be facultatively caducous. based on its, β-tubulin, and cox i sequences ph ... | 2010 | 21354534 |
| cloning and characterization of cdna encoding an elicitor of phytophthora colocasiae. | the rapid and effective activation of disease resistance responses is essential for plant defense against pathogen attack. these responses are initiated when pathogen-derived molecules (elicitors) are recognized by the host. a cdna encoding elicitor, the major secreted extracellular glycoprotein of phytophthora colocasiae, a pathogen of taro (colocasia esculenta) plants, was isolated, sequenced and characterized. the expression of the corresponding elicitor gene during the disease cycle of p. co ... | 2010 | 19230634 |
| purification and characterization of elicitor protein from phytophthora colocasiae and basic resistance in colocasia esculenta. | an elicitor was identified in the fungus phytophthora colocasiae. the molecular weight of the purified elicitor was estimated by means of gel filtration chromatography and sds-page and was estimated as 15kda. protease treatment severely reduced its activity, allowing the conclusion that the elicitor is proteinaceous. infiltration of a few nanograms of this proteinaceous elicitor into taro leaves caused the formation of lesions that closely resemble hypersensitive response lesions. the elicitatio ... | 2009 | 18990553 |
| occurrence of isolates of phytophthora colocasiae in taiwan with homothallic behavior and its significance. | leaf blight and corm rot caused by phytophthora colocasiae are the most devastating diseases of taro. oospores of p. colocasiae have not been considered important in the survival in natural soil because the pathogen is heterothallic and there is essentially no chance for the presence of both a1 and a2 mating types in the same host tissue. during our recent survey of the mating type distribution of p. colocasiae in taiwan seven homothallic isolates of phytophthora were obtained from diseased taro ... | 2008 | 18959157 |
| antioxidative enzymes and isozymes analysis of taro genotypes and their implications in phytophthora blight disease resistance. | assessment of the differential expression of antioxidative enzymes and their isozymes, was done in 30 day-old ex vitro raised plants of three highly resistant (dp-25, jhankri and duradim) and one highly susceptible (n-118) genotypes of taro [colocasia esculenta (l.) schott]. antioxidative enzymes were assayed in the ex vitro plants, 7 days after inoculation with the spores (15,000 spores ml(-1) water) of phytophthora colocasiae raciborski to induce taro leaf blight disease. uninoculated ex vitro ... | 2007 | 17404895 |
| single-strand-conformation polymorphism of ribosomal dna for rapid species differentiation in genus phytophthora. | single-strand-conformation polymorphism (sscp) of ribosomal dna of 29 species (282 isolates) of phytophthora was characterized in this study. phytophthora boehmeriae, phytophthora botryosa, phytophthora cactorum, phytophthora cambivora, phytophthora capsici, phytophthora cinnamomi, phytophthora colocasiae, phytophthora fragariae, phytophthora heveae, phytophthora hibernalis, phytophthora ilicis, phytophthora infestans, phytophthora katsurae, phytophthora lateralis, phytophthora meadii, phytophth ... | 2003 | 12892637 |
| identification and characterization of differentially expressed genes in the resistance reaction in taro infected with phytophthora colocasiae. | leaf blight disease caused by phytophthora colocasiae represents a major constraint to the growth and yield of taro (colocasia esculenta l.). ongoing research on model plant systems has revealed that defense responses are activated via signaling pathways mediated by endogenous signaling molecule such as salicylic acid, jasmonic acid, and ethylene. activation of plant defenses is associated with changes in the expression of large number of genes. to gain a better understanding of defense response ... | 2009 | 18622758 |