EFFECT OF FLURIDONE ON FREE SUGAR LEVEL IN HEAT-STRESSED MUNGBEAN SEEDLINGS

Germination per cent and growth of ML 267 and ML 131 cvs of mungbean ( Vigna radiata Wilzec) seedlings was adversely affected by high tempera ture stress (42 degrees C). Pre-sowing seed soaking in fluridone (flu) significantly increased germination per cent and seedling growth at b oth normal and high temperatures. Total free sugar accumulation was si gnificantly increased under stress and Flu pre-treatment significantly increased it, both at 30 degrees and 42 degrees C. Enzyme activities of alpha- and beta-amylases were found correlated with increased accum ulation of sugars under stress. Flu pre-treatment partially ameliorate d the effects of heat stress.