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Trp_(548)Met mutation of acetolactate synthase in rice confers resistance to a broad spectrum of ALS-inhibiting herbicides

查看全文 作　　者：Lei [1,2,3]Chen;Gang [2]Gu;Chengxu [2]Wang;Zhufeng [2]Chen;Wei [1]Yan;Man [2]Jin;Gang [2]Xie;Junli [2]Zhou;Xing Wang [2,3]Deng;Xiaoyan [1,2]Tang 高影响力作者 机构地区：[1]Guangdong Provincial Key Laboratory of Biotechnology for Plant Development,School of Life Sciences,South China Normal University,Guangzhou 510631,Guangdong,China;[2]Shenzhen Institute of Molecular Crop Design,Shenzhen 518107,Guangdong,China;[3]Institute of Plant and Food Sciences,Department of Biology,Southern University of Science and Technology,Shenzhen 518055,Guangdong,China高影响力机构 出　　处：《The Crop Journal》索引2021年第9卷第4期,共9页高影响力期刊 基　　金：supported by Major Program of Guangdong Basic and Applied Research(2019B030302006);National Natural Science Foundation of China(U1901203 and 31901532);Natural Science Foundation of Guangdong Province(2018B030308008 and 2018A0303130270);Shenzhen Commission on Innovation and Technology Programs(JCYJ20180507181837997);China Postdoctoral Science Foundation(2018M633069 and 2019M652920)。 摘　　要：Herbicide resistance in crop plants is valuable for integrated weed management in agriculture. Herbicide resistant rice, in particular, is important to management of weedy rice, a close relative of cultivated rice and a noxious weed prevalent in rice fields that remains challenging to farmers worldwide. Herbicide resistant plants can be obtained through transgenic approach or by mutagenesis of regular plant and screening of mutants with elevated resistance to herbicide. In this study, we conducted ethyl methyl sulfonate mutagenesis(EMS) to elite indica cultivar Huanghuazhan(HHZ) and screened for mutants resistant to imazapic, a herbicide that can inhibit the acetolactate synthase(ALS) in plants. We obtained three mutants of Os ALS gene that have not been reported previously in rice. One of the mutants, with Trp_(548) changed to Met(W_(548)M), was analyzed in more details in this study. This mutation had no negative effect on the plant physiology and morphology as well as rice yield. Compared with the imidazolinone-resistant mutant S_(627)N(Ser_(627) changed to Asn) that has been deployed for Clearfield rice development, W_(548)M mutant showed high levels of resistance to a broad spectrum of five families of ALSinhibiting herbicides, in addition to a higher level of resistance to herbicides of the imidazolinone family.The herbicide-resistance was stably inherited by crossing into other rice lines. Thus, the W_(548)M mutation provides a valuable resource for breeding of herbicide resistant rice and weed management. 关 键 词：ALS-inhibiting herbicide Herbicide tolerance Acetolactate synthase RICE MUTANT
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