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The effect of carbetamide herbicide on pigment contents , carbohydrate and nitrogen levels and 14CO2 – photoassimilation in chlorella vulgaris
Abstract
Treatments of chlorella vulgaris with carbetamide (-1-(ethylcarbamyol) ethyl phenyl carbamate) induced changes in pigment content , 5 ppm showed considerable increase in pigment content , when 25 and 50 ppm induced bleaching after 5 and 7 days , respectively . thereafter , a remarkeable re-greening of these cultures was observed . carbetamide treatment reduced carbohydrate components associated with an increase in nitrogen component at high concentration of the herbicide. Carbeta mide induced changes in the pattern of 14CO2-photoassimilation. A significant increase in the ratio of soluble/insoluble products was obtained , this being indicative that the rate of transformation of soluble to insoluble photosynthates
