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Herbicidal indolizine‐5,8‐diones: photosystem I redox mediators
Author(s) -
Smith Stephen C,
Clarke Eric D,
Ridley Stuart M,
Bartlett David,
Greenhow Daren T,
Glithro Harry,
Klong Agnes Y,
Mitchell Glynn,
Mullier Graham W
Publication year - 2005
Publication title -
pest management science
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.296
H-Index - 125
eISSN - 1526-4998
pISSN - 1526-498X
DOI - 10.1002/ps.980
Subject(s) - photosystem ii , redox , chemistry , indolizine , photosynthesis , glutathione , photosystem i , chloroplast , photochemistry , biophysics , biochemistry , stereochemistry , organic chemistry , biology , enzyme , gene
6,7‐Disubstituted indolizine‐5,8‐diones showed activity as herbicides, giving rapid desiccation symptomology in whole‐plant tests and bleaching in leaf‐disc assays. In isolated chloroplasts, such compounds initiated rapid uptake of oxygen in Photosystem I. A redox mediator mode of action was further supported by electrochemical studies. Several compounds described had low photostability, high volatility, hydrolytic instability or reactivity with glutathione. The detrimental effects that these factors may have had on expression of herbicidal activity are discussed. Copyright © 2004 Society of Chemical Industry