A HAK family Na+ transporter confers natural variation of salt tolerance in maize.,Nature Plants

当前位置： X-MOL 学术 › Nat. Plants › 论文详情

Our official English website, www.x-mol.net, welcomes your feedback! (Note: you will need to create a separate account there.)

A HAK family Na+ transporter confers natural variation of salt tolerance in maize.
Nature Plants ( IF 15.8 ) Pub Date : 2019-12-09 , DOI: 10.1038/s41477-019-0565-y
Ming Zhang ₁ , Xiaoyan Liang ₁ , Limin Wang ₁ , Yibo Cao ₁ , Weibin Song ₂ , Junpeng Shi ₂ , Jinsheng Lai _{2,

3} , Caifu Jiang _{1,

3}

Affiliation

Excessive sodium ion (Na+) concentrations in cultivated land alter crop yield and quality worldwide. Previous studies have shown that shoot Na+ exclusion is essential in most crops for salt tolerance. Here, we show by a genome-wide association study that Zea may L. Na+ content 2 (ZmNC2), encoding the HAK family ion transporter ZmHAK4, confers the natural variation of shoot Na+ exclusion and salt tolerance in maize. The ZmHAK4 locus accounts for ~11% of the shoot Na+ variation, and a natural ZmHAK4-deficient allele displays a decreased ZmHAK4 expression level and an increased shoot Na+ content. ZmHAK4 is preferentially expressed in the root stele and encodes a novel membrane-localized Na+-selective transporter that mediates shoot Na+ exclusion, probably by retrieving Na+ from xylem sap. ZmHAK4 orthologues were identified in other plant species, and the orthologues of ZmHAK4 in rice and wheat show identical expression patterns and ion transport properties, suggesting that ZmHAK4 orthologues mediate an evolutionarily conserved salt-tolerance mechanism. Finally, we show that ZmHAK4 and ZmHKT1 (a HKT1 family Na+-selective transporter) confer distinct roles in promoting shoot Na+ exclusion and salt tolerance, indicating that the combination of the favourable alleles of ZmHKT1 and ZmHAK4 can facilitate the development of salt-tolerant maize varieties.

中文翻译：

HAK 家族 Na+ 转运蛋白赋予玉米耐盐性的自然变异。

耕地中过量的钠离子 (Na+) 浓度会影响全球作物的产量和质量。先前的研究表明，在大多数作物中，芽中 Na+ 的排除对于耐盐性至关重要。在这里，我们通过全基因组关联研究表明，编码 HAK 家族离子转运蛋白 ZmHAK4 的 Zea may L. Na+ content 2 (ZmNC2) 赋予玉米芽 Na+ 排斥和耐盐性的自然变异。ZmHAK4 基因座占枝条 Na+ 变异的约 11%，天然 ZmHAK4 缺陷等位基因显示出 ZmHAK4 表达水平降低和枝条 Na+ 含量增加。ZmHAK4 优先在根中表达，编码一种新的膜定位 Na+ 选择性转运蛋白，它可能通过从木质部汁液中提取 Na+ 介导芽中 Na+ 的排斥。在其他植物物种中鉴定出 ZmHAK4 直系同源物，ZmHAK4 在水稻和小麦中的直系同源物表现出相同的表达模式和离子转运特性，表明 ZmHAK4 直系同源物介导了进化上保守的耐盐机制。最后，我们表明 ZmHAK4 和 ZmHKT1（HKT1 家族 Na+ 选择性转运蛋白）在促进芽 Na+ 排斥和耐盐性方面具有不同的作用，表明 ZmHKT1 和 ZmHAK4 的有利等位基因的组合可以促进耐盐玉米的发育品种。

更新日期：2019-12-11

点击分享查看原文

点击收藏

阅读更多本刊最新论文本刊介绍/投稿指南11