Asian Journal of Microbiology, Biotechnology & Environmental Sciences Paper

Vol 9, Issue 4, 2007; Page No.(1067-1071)

CHANGES IN THE BIOCHEMICAL CONSTITUENTS OF FOXTAIL MILLET GENOTYPES IN RESPONSE TO FUNGAL INFECTION

A. KAVITHA AND M. VIJAYALAKSHMI

Abstract

Changes in the biochemical constituents of five genotypes of foxtail millet inoculated with seed- borne fungi such as Aspergillusilavus, A. Inger, A. terreus, Penicillium citrinum, Alternaria alternata, Curvularia lunata, C. maculans and Fusarium sp. were recorded. Increase in total phenol and protein content was observed in all the genotypes infected with molds while the protein content of very of them remained similar to that of control. Depletion of starch content was found in all the genotypes inoculated with seed- borne fungi and the extent of depletion varied from 4.6 to 73.6%. Infected seeds also showed a decreasing or increasing trend of total and reducing sugars at the end of 10 days incubation period. In response to fungal inoculation, Lepakshi and Srilaxrni genotypes exhibited relatively higher levels of total phenol, protein, total and reducing sugars than the other tested ones whereas the genotype Krishnadevaraya showed a severe fall in starch content. These studies clearly indicate the deterioration of seed quality and the biochemical changes observed in the genotypes could be used for screening disease resistance to fungal infection.

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