Effects of temperature on some physiological activities in soybean plants sprayed with glyphosate

ABSTRACT

The response of soybean to glyphosate at rates between 10 ppm and 100 ppm was determined at different temperature regimes [28 degree, and 8 degree] with light level of 650 uEm[-2]S[-1]. Glyphosate reduced fresh and dry weight of plants and such reduction increases by the increase in temperatures and concentrations of the herbicides. Experiment of C[14] glyphosate showed that the differences in Phytotoxicity were due to absorption and translocation of the tagged herbicides. Glyphosate treatment induced marked reduction in chlorophyll content, carbohydrate and nitrogen fractions at 20 degree and 28 degree