Transcriptome analysis reveals differing response and tolerance mechanism of EPSPS and GAT genes among transgenic soybeans
文献类型: 外文期刊
作者: Guo, Bing-Fu 1 ; Hong, Hui-Long 1 ; Sun, Li-Ping 3 ; Guo, Yong 1 ; Qiu, Li-Juan 1 ;
作者机构: 1.Chinese Acad Agr Sci, Inst Crop Sci, Natl Key Facil Crop Gene Resources & Genet Improv, 12 Zhongguancun South St, Beijing 100081, Peoples R China
2.Chinese Acad Agr Sci, Inst Crop Sci, MOA Key Lab Soybean Biol Beijing, 12 Zhongguancun South St, Beijing 100081, Peoples R China
3.Jiangxi Acad Agr Sci, Jiangxi Prov Key Lab Oilcrops Biol, Crops Res Inst, Nanchang, Jiangxi, Peoples R China
4.Northeast Agr Univ, Coll Agr, Harbin, Peoples R China
关键词: Soybean; RNA-seq; Glyphosate tolerance; EPSPS; GAT
期刊名称:MOLECULAR BIOLOGY REPORTS ( 影响因子:2.316; 五年影响因子:2.357 )
ISSN: 0301-4851
年卷期: 2021 年 48 卷 11 期
页码:
收录情况: SCI
摘要: Background Glyphosate is a broad-spectrum, non-selective systemic herbicide. Introduction of glyphosate tolerance genes such as EPSPS or detoxification genes such as GAT can confer glyphosate tolerance on plants. Our previous study revealed that co-expression of EPSPS and GAT genes conferred higher glyphosate tolerance without "yellow flashing". However, the plant response to glyphosate at the transcriptional level was not investigated. Methods and results To investigate the glyphosate tolerance mechanism, RNA-seq was conducted using four soybean genotypes, including two non-transgenic (NT) soybeans, ZH10 and MD12, and two GM soybeans, HJ698 and ZH10-6. Differentially expressed genes (DEGs) were identified in these soybeans before and after glyphosate treatment. Similar response to glyphosate in the two NT soybeans and the different effects of glyphosate on the two GM soybeans were identified. As treatment time was prolonged, the expression level of some DEGs involved in shikimate biosynthetic pathway and herbicide targeted cross-pathways was increased or declined continuously in NT soybeans, and altered slightly in HJ698. However, the expression level of some DEGs was altered in ZH10-6 at 12 hpt, while similar expression level of some DEGs involved in shikimate biosynthetic pathway and herbicide targeted cross-pathways was observed in ZH10-6 at 0 hpt and 72 hpt. These observations likely explain the higher glyphosate tolerance in ZH10-6 than in HJ698 and NT soybeans. Conclusions These results suggested that GAT and EPSPS genes together play a crucial role in response to glyphosate, the GAT gene may work at the early stage of glyphosate exposure, whereas the EPSPS gene may be activated after the uptake of glyphosate by plants. These findings will provide valuable insight for the molecular basis underlying glyphosate tolerance or glyphosate detoxication.
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