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Long‐term effects of herbicides on the photosynthetic apparatus I. Influence of diuron, triazines and pyridazinones
Author(s) -
BÖGER P.,
SCHLUE U.
Publication year - 1976
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.1365-3180.1976.tb00395.x
Subject(s) - atrazine , metribuzin , photosynthesis , chemistry , triazine , chlorophyll , electron transport chain , chlorophyll a , biochemistry , pesticide , biology , agronomy , organic chemistry , weed control
Summary: Long‐term effects of herbicides on the photosynthetic membrane system were investigated. For this purpose the unicellular alga Bumilleriopsis filiformis was grown in liquid culture in the presence of sublethal concentrations of diuron, atrazine, metribuzin, and some substituted pyridazinones. This allowed reproducible growth conditions, exact dosing of herbicides, and also the preparation of functionally active cell‐free photosynthetic systems. The electron transport system of cells grown in the presence of ureas and triazine derivatives is not impaired at all, wherea scultivation with pyridazinones damages their photosynthetic redox system. In addition, a strong bleaching effect is observed, whereas the first group of herbicides enhance chlorophyll formation.