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ZmNRAMP4 Enhances the Tolerance to Aluminum Stress in Arabidopsis thaliana

文献类型： 外文期刊

作者： Li, Hongjie 1 ; Wang, Ning 1 ; Hu, Wanpeng 1 ; Yan, Weina 1 ; Jin, Xinwu 1 ; Yu, Yan 1 ; Du, Chengfeng 1 ; Liu, Chan 1 ; He, Wenzhu 2 ; Zhang, Suzhi 1 ;

作者机构： 1.Sichuan Agr Univ, Maize Res Inst, Key Lab Biol & Genet Improvement Maize Southwest, Minist Agr,Agr Dept, Chengdu 611130, Peoples R China

2.Sichuan Acad Agr Sci, Crop Res Inst, Chengdu 610066, Peoples R China

关键词： Al toxicity; ZmNRAMP4; plasma membrane; maize; metal transporter

期刊名称：INTERNATIONAL JOURNAL OF MOLECULAR SCIENCES （ 影响因子：6.208； 五年影响因子：6.628 ）

ISSN：

年卷期： 2022 年 23 卷 15 期

页码：

收录情况： SCI

摘要： Aluminum (Al) toxicity causes severe reduction in crop yields in acidic soil. The natural resistance-associated macrophage proteins (NRAMPs) play an important role in the transport of mineral elements in plants. Recently, OsNrat1 and SbNrat1 were reported specifically to transport trivalent Al ions. In this study, we functionally characterized ZmNRAMP4, a gene previously identified from RNA-Seq data from Al-treated maize roots, in response to Al exposure in maize. ZmNRAMP4 was predominantly expressed in root tips and was specifically induced by Al stress. Yeast cells expressing ZmNRAMP4 were hypersensitive to Al, which was associated with Al accumulation in yeast. Furthermore, overexpression of ZmNRAMP4 in Arabidopsis conferred transgenic plants with a significant increase in Al tolerance. However, expression of ZmNRAMP4, either in yeast or in Arabidopsis, had no effect on the response to cadmium stress. Taken together, these results underlined an internal tolerance mechanism involving ZmNRAMP4 to enhance Al tolerance via cytoplasmic sequestration of Al in maize.

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