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抑制SlDREB3增加了叶子ABA反应,并促进转基因番茄植物的干旱耐受性

Rakhi Prabhakar¹, Asmita Gupta², Rambir Singh³

¹Plant Gene Expression Lab, CSIR-National Botanical Research Institute (Council of Scientific and Industrial Research), Lucknow, 226001, India; Department of Biotechnology, Bundelkhand University, Jhansi, 284128, India.

Biochemical and biophysical research communications

|September 29, 2023

概括

在番茄中操纵SlDREB3基因会影响干旱耐受性. 抑制SlDREB3通过改善ABA反应和保持水分,这对作物产量至关重要,从而提高抗干旱能力.

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:

干旱易感性显著限制了作物产量,特别是在高产品种中.
了解控制植物对干旱压力的反应的遗传机制对于提高作物弹性至关重要.

研究的目的:

研究西红 (Solanum lycopersicum) 中的SlDREB3基因在调节酸 (ABA) 反应和耐旱性方面的作用.
确定SlDREB3表达的操纵如何影响口腔关闭,水损失和干旱条件下的整体植物生存.

主要方法:

在番茄中对SlDREB3表达的基因操纵,产生抑制和过度表达的线条.
评估ABA敏感性,口腔关闭,相对含水量 (RWC),反应性氧物种 (ROS) 水平,以及在水和干旱压力条件下的膜损伤.
分析与SlDREB3操纵有关的ABA信号通路基因的表达.

主要成果:

抑制SlDREB3的线路表现出ABA过敏,快速的口腔关闭,增强的干旱耐受性,更高的RWC,减少的ROS,并在10天的水应激后几乎完全存活.
过度表达 (OEx) 线显示ABA敏感性降低,口腔持续开放,快速流失水分,增加ROS,膜损伤,即使在水条件下也减少RWC,并大大降低生存率.
抑制线显示ABA信号基因的表达更高,而OEx线显示表达减少.

结论:

SlDREB3基因在调节番茄中的ABA信号通路方面发挥着至关重要的作用.
通过SlDREB3操纵控制ABA信号提供了一个有希望的策略,可以提高作物对干旱的耐受性,从而减轻产量损失.
准SlDREB3可以导致开发更有弹性的农业品种,能够承受严重干旱条件.

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