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OsNAC10通过抑制OsHKT1;5的表达和减少Na⁺从芽到米根的循环,从而负面调节盐分耐受性

Liangbo Fu¹, Xincheng Zhang², Yishan Tu³

¹College of Advanced Agricultural Sciences, Zhejiang A&F University, Hangzhou 311300, China.

Plant communications

|February 11, 2026

概括

米植物通过控制芽中的 (Na+) 水平来保持盐分耐受性. 一项新的研究显示,OsNAC10基因抑制了OsHKT1;5载体,对盐分耐受性产生负面影响. 针对OsNAC10可以提高作物弹性.

科学领域:

植物生物学植物生物学
分子遗传学分子遗传学
农业科学农业科学

背景情况:

保持低射量 (Na+) 对于谷物盐耐受性至关重要.
OsHKT1;5载体调节长距离Na+运输,但其在盐应激下的转录控制不清楚.

研究的目的:

为了识别和描述在盐应激下调节OsHKT1;5的水转录因子.
阐明OsNAC10在调节米盐耐受性的分子机制.

主要方法:

在盐应激下对野生型和突变型大米进行基因表达分析 (OsNAC10,OsHKT1;5).
产生和分析OsNAC10淘汰赛和过度表达线.
亚细胞局部化,分子相互作用试验和促进体结合分析.
对双重突变的遗传分析 (nac10/hkt1;5).
在盐土条件下进行实地试验,以评估谷物产量.

主要成果:

OsNAC10 作为 OsHKT1 的转录抑制剂;5.5.
OsNAC10淘汰突变体表现出增强的盐分耐受性,降低了喷射Na+和减少了根到喷射Na+运输.
OsNAC10直接与OsHKT1;5促进体结合,抑制其表达.
在 nac10 突变体中,盐耐受性取决于 OsHKT1;5 功能.
在盐土中,OsNAC10淘汰线表现出更好的谷物产量.

结论:

OsNAC10通过抑制OsHKT1;5表达来负面调节米盐耐受性.
OsNAC10代表了培育耐盐谷物作物的潜在目标.
了解这种调节机制对于改善盐水环境中的作物产量至关重要.

关键词:

5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 6 6 6 6 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 8 8 8 8 8 8 8 8 8 8 8 8 8 9 9 9 9 9 9 9 9 9 9 9 9 9 9 9 9 9 9 9 9 9 9 9 9 9 9 9 9 9 9 9 9 9 9 9 9 9 9 9 9 9 9 9 9 9 9 9 9 9 9 9 9 9 9 9 9 9 9 9 9 9 9 9 9 9 9 9 9 9 9 9 9 9 9 9 9 9 9 9 9 9 9 including including including including including including Na(+) 的运输方式.这就是OsHKT1的原因.在 OsNAC10 中,我们可以使用 OsNAC10 大米大米大米大米大米盐的耐受性盐的耐受性转录规则转录规则转录规则

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