Premium
SELECTIVITY AND PHYSIOLOGICAL INACTIVATION OF SOME HERBICIDES INHIBITING PHOTOSYNTHESIS
Author(s) -
OORSCHOT J. L. P.
Publication year - 1965
Publication title -
weed research
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.693
H-Index - 74
eISSN - 1365-3180
pISSN - 0043-1737
DOI - 10.1111/j.1365-3180.1965.tb00331.x
Subject(s) - transpiration , simazine , chemistry , photosynthesis , hill reaction , botany , horticulture , pesticide , agronomy , biology , chloroplast , biochemistry , atrazine , gene
Summary. The effects of several herbicides on the rates of CO 2 uptake and transpiration of intact plants were measured. A simple technique is described which reveals whether photosynthesis‐inhibiting herbicides are inactivated by plants. By this method, the inactivation of simazine by maize could be confirmed. Evidence is presented for physiological inactivation of monuron by Plantago lanceolata , of cycluron (OMU) and pyrazon by sugar beet, of N'‐(4‐butoxyphenyl)‐NN‐dimethylurea by of 5‐bromo‐6‐methyl‐3‐phenyluracil by flax. Certain plant species showed different reactions to some other new herbicides. The effect of herbicides in the culture solution on CO 2 uptake by the leaves is probably largely determined by the rate of transpiration of the plants. Assuming that uptake in proportional to transpiration rate, estimates of the concentration of the herbicides inside the plant were made. L'inactivation physiologique de quelques herbicides produisant une inhibition de la photosynthèse