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乙烯通过改变根结构和诱导玉米幼苗中的aerenchyma形成,提高了浸水耐受性

Shiying Geng¹, Ziqing Lin¹, Shipeng Xie¹

¹Engineering Research Center of Plant Growth Regulator, Ministry of Education & College of Agronomy and Biotechnology, China Agricultural University, No. 2 Yuanmingyuan Xi Lu, Haidian District, Beijing, 100193, China; State Key Laboratory of Plant Environmental Resilience, China Agricultural University, No. 2 Yuanmingyuan Xi Lu, Haidian District, Beijing, 100193, China.

Journal of plant physiology

|June 22, 2023

概括

乙烯 (ET) 通过改善根结构和诱导空气基质的形成,增强了玉米幼苗适应浸水的能力. 用ET预处理玉米可以提高浸水耐受性和弹性.

科学领域:

植物生理学植物生理学
农业学是一种农业学.
压力生物学压力生物学

背景情况:

浸水严重损害了玉米的生长和产量.
乙烯 (ET) 与植物对环境压力的反应有关.

研究的目的:

研究乙烯在玉米适应水浸压力的作用.
阐明乙烯增强玉米浸水耐受性的机制.

主要方法:

在水浸下分析根结构和侧向根形成.
内源性乙烯水平的量化和水浸感性的评估.
用显微镜检查由乙烯诱导的空气酶形成.
调查转录因子EREB90在乙烯信号传递和aerenchyma发展中的作用.

主要成果:

乙烯处理促进了42.1%的横向根形成,并改善了水浸下的苗木生长.
具有高内源性乙烯的植物对浸水压力的敏感性降低.
乙烯在根的中间皮层中诱导了空气基因的形成,与浸水诱导的空气基因不同,并且不太容易腐烂.
由乙烯信号激活的转录因子EREB90通过编程细胞死亡增强了aerenchyma的形成.
过度表达EREB90增加了玉米的浸水耐受性.

结论:

乙烯通过调节根部发育和气体交换,在玉米适应浸水方面发挥着至关重要的作用.
乙烯诱导的空气酶形成,由EREB90和编程细胞死亡介导,在压力下增强根功能.
用乙烯进行预处理可以提高玉米的抗浸水能力,为作物管理提供了潜在的策略.

关键词:

一个空气化症.乙烯乙烯是一种玉米玉米玉米是一种在水中浸泡,使水淹没.

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