Changes In Chloroplast Pigments And Seedling Growth Attributes Of Mungbean As Induced By Pesticidal Seed Treatments

G. Panduranga Murthy* and Vinay B. Raghavendra

P. G. Department of Studies and Research in Botany University of Mysore, Manasagangotri, Mysore - 06 (India)

ABSTRACT: Seed treatment with Gaucho (an insecticide) and Krilaxyl (a fungicide) at the concentrations of recommended dosages, below recommended, above recommended and in combination dosages were done on Mungbean cv. PS-116 at 12, 24 and 48 hours exposure periods. Wet treatment of both the pesticides exhibited non significant variations on germination and they varied in respect of root length and shoot length at recommended and higher dosages of longer exposure periods. The calculated results of vigour index, tolerance index were decreased and the percent phytotoxicity was increased along with the increase in concentrations over control. The content of chloroplast pigments, (Chlorophyll a, b, total chlorophyll and carotenoid) were also reduced drastically at higher and in combination dosages of both the pesticides at all the exposure periods. Lower concentrations of lower exposure periods did not induce much change on germination and other parameters.

KEYWORDS: Germination; early seedling growth; pesticide seed treatments; mungbean

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