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The mechanism of linuron phytotoxicity in maize
Author(s) -
MUSCHINEK GY,
GARAB GY. I.,
MUSTÁRDY LA.,
FALUDIDÁNIEL Á.
Publication year - 1979
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.1365-3180.1979.tb01582.x
Subject(s) - phytotoxicity , chemistry , membrane , mechanism of action , biophysics , botany , biochemistry , biology , in vitro
Summary: The mechanism whereby Iinuron changes the functional and structural characteristics of chloroplast membranes was studied. The primary effect of the herbicide, the inhibition of phoiosynihetic electron transport results in an immuediatecessa‐tion of carbon dioxide fixation and alterations in the membrane energization. These are accompanied by secondary processes contributing to phytotoxicity. The fundamental action in its phytotoxicity, as shown in a model system of isolated chloro‐plasts, is the peroxidaiive breakdown of the polyunsaturated membrane lipids. This leads to destruction of the pigments, changes in the energy transfer, disorganization of the chloro‐plast membranes, and accumulation of toxic organic peroxides.