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Bulletin of Environmental Contamination and Toxicology 2009 Jul ; (1) :0
Enantioselective effects of chiral herbicide diclofop acid on rice Xiushui 63 seedlings.
Ye J,   Zhang Q,   Zhang A,   Wen Y,   Liu W  

Abstract
In this study, the acute toxicity (72-h EC50 values) of chiral diclofop acid towards rice Xiushui 63 seedlings and its effects on the Hill reaction activities of chloroplasts were determined. Significant differences were observed between the two enantiomers in 72-h EC50 values and in both in vivo and in vitro relative Hill reaction activities. These observations indicate that the enantiomers of diclofop acid pose different toxicities to rice seedlings: the S-enantiomer is more toxic to leaves and the R-enantiomer is more toxic to roots. These enantioselective toxic effects on rice seedlings should be taken into account in chiral herbicide application.

DHARA ID: D017588 Pubmed ID: 19452112


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