Identification and expression pattern of a glutathione S-transferase in Echinochloa crus-galli
文献类型： 外文期刊
作者： Li, G. 1 ; Wu, S. G. 1 ; Yu, R. X. 1 ; Cang, T. 1 ; Chen, L. P. 1 ; Zhao, X. P. 2 ; Cai, L. M.; Wu, C. X.;
作者机构： 1.Zhejiang Acad Agr Sci, Inst Qual Stand Agr Prod, Zhejiang Prov Key Lab Pesticide Residue Detect &, State Key Lab Breeding Base Zhejiang Sustainable, Hangzhou, Zhejiang, Peoples R China
2.Zhejiang Acad Agr Sci, Inst Qual Stand Agr Prod, Zhejiang Prov Key Lab Pesticide Residue Detec
关键词： barnyardgrass;expression analysis;GST gene;quinclorac resistance
期刊名称：WEED RESEARCH （ 影响因子：2.424； 五年影响因子：2.533 ）
ISSN： 0043-1737
年卷期： 2013 年 53 卷 5 期
页码：
收录情况： SCI
摘要： Plant glutathione S-transferase (GST) forms a major part of the herbicide detoxification enzyme network in plants. A GST cDNA was isolated from Echinochloa crus-galli and characterised. The gene, designated EcGST1 (E.crus-galli GeneBank no: ), has a 684bp open reading frame predicted to encode a 25kD protein. Sequence alignment showed that EcGST1 is a GST homologue. Its expression in response to quinclorac treatment was monitored in seedlings (leaves and roots) and adult plants (leaves, roots, stems and seeds) of quinclorac-resistant (R) and susceptible (S) biotypes of E.crus-galli. EcGST1 expression was 1.5-3 times greater in the R plants than in the S plants. However, after exposure to quinclorac, the difference in the expression levels of EcGST1 in R plants, compared with S plants, increased to a ratio of 6-10. Enhanced EcGST1 levels should enable greater quinclorac detoxification following quinclorac stimulation in R plants. GST-based metabolism may be partially responsible for resistance to quinclorac in E.crus-galli. The results suggest a new resistance mechanism for this R biotype in Chinese rice fields.
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