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Involvement of miR528 in the Regulation of Arsenite Tolerance in Rice (Oryza sativa L.)

文献类型： 外文期刊

作者： Liu, Qingpo 1 ; Hu, Haichao 1 ; Zhu, Leyi 1 ; Li, Ruochen 1 ; Feng, Ying 3 ; Zhang, Liqing 1 ; Yang, Yuyan 1 ; Liu, Xingq 1 ;

作者机构： 1.Zhejiang A&F Univ, Coll Agr & Food Sci, Dept Agron, Hangzhou 311300, Zhejiang, Peoples R China

2.Zhejiang A&F Univ, Coll Agr & Food Sci, Key Lab Qual Improvement Agr Prod Zhejiang Prov, Hangzhou 311300, Zhejiang, Peoples R China

3.Zhejiang Univ, Coll Environm & Resources Sci, Hangzhou 310058, Zhejiang, Peoples R China

4.Zhejiang Acad Agr Sci, Inst Virol & Biotechnol, Hangzhou 310021, Zhejiang, Peoples R China

关键词： rice;miRS28;overexpression;arsenite tolerance;gene expression pattern

期刊名称：JOURNAL OF AGRICULTURAL AND FOOD CHEMISTRY （ 影响因子：5.279； 五年影响因子：5.269 ）

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收录情况： SCI

摘要： Tens of miRNAs were previously established as being arsenic (As) stress responsive in rice. However, their functional role in As tolerance remains unclear. This study demonstrates that transgenic plants overexpressing miR528 (Ubi::MIRS28) were more sensitive to arsenite [As(III)] compared with wild-type (WT) rice. Under normal and stress conditions, miR528-5p and -3p were highly up-regulated in both the roots and leaves of transgenic plants, which exhibited a negative correlation with the expression of seven target genes. Compared with WT plants, Ubi::MIR528 plants showed excessive oxidative stress generation and remarkable amino acid content changes in the roots and leaves upon As(III) exposure. Notably, the expression profiles of diverse functional genes were clearly different between WT and transgenic plants. Thus, the observed As(III) sensitivity of Ubi::MIR528 plants was likely due to the strong alteration of antioxidant enzyme activity and amino acid profiles and the impairment of the As(III) uptake, translocation, and tolerance systems of rice.

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