Expression of sulfur uptake assimilation-related genes in response to cadmium,bensulfuron-methyl and their co-contamination in rice roots

查看全文 作　　者：Jian [1]Zhou;Zegang [1]Wang;Zhiwei [1]Huang;Chao [2]Lu;Zhuo [1]Han;Jianfeng [2]Zhang;Huimin [2]Jiang;Cailin [1]Ge;Juncheng [2]Yang

机构地区：[1]College of Bioscience and Biotechnology, Yangzhou University;[2]Institute of Agricultural Resources and Regional Planning, Chinese Academy of Agricultural Sciences

出　　处：《Journal of Environmental Sciences》索引2014年第26卷第3期,共12页

基　　金：supported by the National Natural Science Foundation of China(No.20877101);the Special Fund for Agro-Scientific Research in the Public Interest(No.201103007) 摘　　要：The responses of sulfur(S) uptake assimilation-related genes' expression in roots of two rice cultivars to cadmium(Cd), bensulfuron-methyl(BSM) and their co-contamination(Cd+BSM) were investigated by gene-chip microarray analysis and quantitative real-time PCR(QRT-PCR) technology. Treatments of Cd and Cd+BSM induced expression of sulfate transporter and permease genes, and promoted sulfate uptake in rice roots. Cd+BSM could alleviate Cd toxicity to cv. Fengmeizhan seedlings, probably due to Cd+BSM promoting greater S absorption by seedlings. Cd and Cd+BSM induced expression of sulfate assimilation-related genes, and thus activated the sulfur assimilation pathway. Cd and Cd+BSM induced expression of phytochelatin synthase and metallothionein genes, and induced expression of glutathione S-transferases(GSTs), glutathione synthase(GS) and antioxidation enzyme genes, which detoxified Cd2+. It is suggested that(to cope with the toxicity of Cd, BSM and their co-contamination) the S uptake and assimilation pathway was activated in rice roots by increased expression of related genes, thus enhancing the supply of organic S for synthesis of Cd or BSM resistance-related substances. 关键词：镉(CD) 根部吸收相关基因水稻品种苄嘧磺隆硫酸盐同化合作

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Expression of sulfur uptake assimilation-related genes in response to cadmium,bensulfuron-methyl and their co-contamination in rice roots

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