Characterization of sulfonylurea-resistant Schoenoplectus juncoides having a target-site Asp376Glu mutation in the acetolactate synthase |
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Authors: | Yoshinao Sada Hajime Ikeda Seiji Yamato Satoru Kizawa |
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Institution: | 1. Health and Crop Sciences Research Laboratory, Sumitomo Chemical Co., Ltd, Takarazuka, Hyogo, Japan;2. Crop Protection Division – International, Sumitomo Chemical Co., Ltd, Tokyo, Japan |
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Abstract: | Schoenoplectus juncoides, a noxious weed for paddy rice, is known to become resistant to sulfonylurea (SU) herbicides by a target-site mutation in either of the two acetolactate synthase (ALS) genes (ALS1 and ALS2). SU-resistant S. juncoides plants having an Asp376Glu mutation in ALS2 were found from a paddy rice field in Japan, but their resistance profile has not been quantitatively investigated. In this study, dose–response of the SU-resistant accession was compared with that of a SU-susceptible accession at in vivo whole-plant level as well as at in vitro enzymatic level. |
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Keywords: | Schoenoplectus juncoides Asp376Glu mutation Heterologously-expressed ALS Cross resistance Dose&ndash response Resistance factor |
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