Effect of planting dates and development of yellow mosaic viruson biochemical constituents of moth bean genotypes
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Keywords:Moth bean. Vigna aconitifolia, biochemical metabolities. yellow mosaic virus
Effect of yellow mosaic virus (YMV) infection on changes in biochemical metabolites was studied in susceptible (GMO 9101) and resistant (CZM 79) moth bean (Vigna aconitifolia) genotypes at Jodhpur, Rajasthan, during the rainy season of 1997 and 1998. In general, the levels of total soluble carbohydrates, starch, chlorophyll b and O-dihydroxy phenols were higher in the healthy leaves of both the genotypes planted under late sown conditions. The reduction in contents of chlorophylls a and b, carotenoids, total soluble carbohydrates, starch, total phenols and O-dihydroxy phenols were more in susceptible than in resistant genotype following YMV infection. A significant increase in free proline content was estimated after YMV infection in both the genotypes, but the percentage increase was more in resistant genotype CZM 79. Total phenols, free amino acids and soluble protein content increased with increasing levels of YMV infection in susceptible GMO 9101. However, there was a significant decrease inthe contents of total chlorophyll, starch, O-dihydroxy phenols, dry matter and activities of catalase, peroxidase and nitrate reductase enzymes with the increasing intensity of disease.
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