The Effect of 2-Chloro-4-ethylamino-6-isopropyl-amino-s-triazine (Atrazine) on Distribution of14C-Compounds Following14CO2Fixation in Excised Kidney Bean Leaves

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Abstract
Excised leaves of kidney bean plants treated with various concentrations of atrazine for different periods were allowed to fix 14CO2 CO2 fixation was inhibited by atrazine. The 14C-labelling pattern of atrazine-treated leaves resembled dark Co2-fixation patterns. The carbon-I-carboxyl group of 14C-aspartic acid from atrazine-treated and ‘dark’ leaves showed no significant differences in total radioactivity. Although atrazine disrupted the photosynthetic apparatus, it seemed to have no effect on non-photosynthetic CO2 fixation.