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ALS herbicide resistance mutations in Raphanus raphanistrum: evaluation of pleiotropic effects on vegetative growth and ALS activity

文献类型： 外文期刊

作者： Li, Mei 1 ; Yu, Qin 1 ; Han, Heping 1 ; Vila-Aiub, Martin 1 ; Powles, Stephen B. 1 ;

作者机构： 1.Univ Western Australia, Sch Plant Biol, Australian Herbicide Resistance Initiat, Nedlands, WA 6009, Australia

2.Shandong Acad Agr Sci, Inst Plant Protect, Jinan, Peoples R China

3.Univ Buenos Aires, Fac Agron, CONICET, IFEVA, RA-1053 Buenos Aires, DF, Argentina

关键词： adaptation;acetolactate synthase (ALS);ALS activity;mutations;resistance mechanism;resistance allele;target-site mutation

期刊名称：PEST MANAGEMENT SCIENCE （ 影响因子：4.845； 五年影响因子：4.674 ）

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收录情况： SCI

摘要： BACKGROUND: Gene mutations that endow herbicide resistance may cause pleiotropic effects on plant ecology and physiology. This paper reports on the effect of a number of known and novel target-site resistance mutations of the ALS gene (Ala-122-Tyr, Pro-197-Ser, Asp-376-Glu or Trp-574-Leu) on vegetative growth traits of the weed Raphanus raphanistrum. RESULTS: The results from a series of experiments have indicated that none of these ALS resistance mutations imposes negative pleiotropic effects on relative growth rate (RGR), photosynthesis and resource-competitive ability in R. raphanistrum plants. The absence of pleiotropic effects on plant growth occurs in spite of increased (Ala-122-Tyr, Pro-197-Ser, Asp-376-Glu) and decreased (Trp-574-Leu) extractable ALS activity. CONCLUSION: The absence of detrimental pleiotropic effects on plant growth associated with the ALS target-site resistance mutations reported here is a contributing factor in resistance alleles being at relatively high frequencies in ALS-herbicide-unselected R. raphanistrum populations.

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