Abstract
The objective of this paper was to investigate the protective effect of three potential herbicide safeners (3-dichloroacetyl oxazolidine and its two optical isomers) on detoxifying to chloroacetanilide herbicide acetochlor in maize. In this study, physiological and biochemical tests were conducted under laboratory condition in 2015. All safeners increased the expression levels of herbicide detoxifying enzymes, including glutathione S-transferases (GST), catalase (CAT) and peroxidase (POD) to reduce chloroacetanilide herbicide phytotoxicity in maize seedlings. Our results suggest that the R-isomer of R-29148 can induce glutathione (GSH) expression, GST activity, and affinity for the 1-chloro2,4-dinitrobenzene (CDNB) substrate in maize, which can protect maize from injury by chloroacetanilide herbicide acetochlor. Further information on the chiral safener role in antioxida
Highlights
Acetochlor is a kind of selective herbicide before sprout
The results showed that all the three safeners significantly decreased the inhibition by the acetochlor herbicide, and the order of protective ability of three chiral safeners was as follows: R-isomer > R-29148 > S-isomer
Based on data obtained in this study, it can be concluded that the effects of racemic R-29148 and its chiral isomers on growth and enzymes activity of maize could protect maize against injury from chloroacetanilide herbicides acetochlor
Summary
Acetochlor is a kind of selective herbicide before sprout. It is principally used for control of most annual grasses and certain broadleaf weed species of corn, cotton, cabbage, citrus, and peanut crops. Acetochlor is absorbed mainly by germinating plant shoots, and secondly by roots. It appears to inhibit geranylgeranyl pyrophosphate (GGPP) cyclisation enzyme synthesis in susceptible plants (Braswell et al 2016). Studies showed that crops injury from acetochlor was greater in wet soil conditions within a two week period after application (Bouchonnet et al 2011; Hausman et al 2013). Corn injury from acetochlor was often associated with the phenomenon that leaves couldn’t pull free from the whorl and form a “ladder” like plant. General symptoms included stunted plants with abnormally thick, short roots or twisted shoots and dark green leaves, (Jursik et al 2011; Braswell et al 2016)
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