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新型核局部化GRAM蛋白编码的OsGRAM57基因通过ABA依赖的途径和调节的碳水化合物代谢增强了盐耐受性

Harshita Joshi¹, Shalini Tiwari², Kenneth Berendzen³

¹Microbial Technologies Division, Council of Scientific and Industrial Research-National Botanical Research Institute (CSIR-NBRI), Rana Pratap Marg, Lucknow 226001, India; Department of Botany, University of Lucknow, Lucknow 226007, India.

International journal of biological macromolecules

|May 27, 2024

概括

这项研究确定了OsGRAM57,一种新的核局部化蛋白质,可显著提高植物的盐分耐受性. OsGRAM57通过调节酸 (ABA) 途径和碳水化合物代谢来提高植物的弹性.

科学领域:

植物分子生物学植物分子生物学
无生物压力生理学生物压力生理学
植物遗传学植物遗传学

背景情况:

众所周知,编码GRAM域的蛋白质在植物生长和生物应激反应中的作用.
在非生物应激中GRAM蛋白的功能,特别是盐耐受性,仍然在很大程度上未被探索.
了解新型调节剂对于提高作物弹性至关重要.

研究的目的:

研究核局部GRAM蛋白,OsGRAM57在植物对盐应激反应中的作用.
为了阐明OsGRAM57赋予盐分耐受性的分子机制.
评估OsGRAM57在增强植物对不利环境条件的抵抗力方面的潜力.

主要方法:

产生和分析OsGRAM57-过度表达的Arabidopsis thaliana (OsGRAM57-OEX) 系列.
在盐应力下测量生理,生化和离子含量 (K+/Na+比).
亚酸 (ABA) 量化,植物激素分析和代谢分析 (碳水化合物代谢).
分析与ABA信号传递和应激反应相关的基因表达,包括交换活化试验.

主要成果:

与野生类型 (WT) 植物相比,OsGRAM57-OEX系列表现出明显增强的盐耐受性.
过度表达OsGRAM57调节了关键的生理和生化指数,改善了离子稳态.
在OsGRAM57-OEX苗木中观察到内源性ABA水平的增加和碳水化合物代谢的改变.
OsGRAM57被确定为ABA信号传递的中央调节器,影响应激反应和代谢基因.

结论:

OsGRAM57在提高沙盐应激耐受性方面发挥着至关重要的积极作用.
由OsGRAM57赋予的盐分耐受性通过一种ABA-依赖的途径进行介导.
OsGRAM57微调碳水化合物代谢和ABA信号,以改善植物对盐的抗性.
OsGRAM57代表了基因工程的一个有希望的目标,以提高作物对非生物压力的耐受性.

关键词:

在 ABA 信号传输中.无生物应激应激是一种非生物应激.在BIFC中,BIFC是指BIFC.代谢学代谢学代谢学盐分盐分盐分盐分盐分盐的耐受性盐的耐受性

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