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转录基因和生理学研究揭示,布拉西诺利德在低温压力下维持玉米多重代谢的平衡

Xiaoqiang Zhao¹, Fuqiang He¹, Guoxiang Qi¹

¹State Key Laboratory of Aridland Crop Science, College of Agronomy, Gansu Agricultural University, Lanzhou 730070, China.

International journal of molecular sciences

|September 14, 2024

概括

外源素 (BRs) 通过增强抗氧化活性和调节植物激素,改善玉米幼苗的低温耐受性 (LT). 这项研究揭示了玉米中BR介导的抗寒应激的关键分子机制.

科学领域:

植物科学植物科学
分子生物学分子生物学
农业科学农业科学

背景情况:

低温 (LT) 压力显著阻碍了玉米苗的生长和发展.
众所周知,青铜化物 (BRs) 在植物中增强了LT耐受性,但玉米的潜在机制在很大程度上仍未被描述.

研究的目的:

阐明外源性2,4-epibrassinolide (EBR) 增强玉米幼苗低温耐受性的生理和分子机制.
为了确定关键的基因和途径,涉及到玉米的BR介导的LT应激反应.

主要方法:

使用高性能液态色谱进行生理分析,以评估抗氧化酶活性,细胞膜稳定性和荷尔蒙水平.
RNA测序用于进行转录组分析和识别差异表达基因 (DEG).
权重基因共同表达网络分析 (WGCNA) 以确定与LT耐受性相关的枢纽基因.

主要成果:

在LT压力下EBR的应用改善了生理特征,包括增加了抗氧化酶活性,增强了细胞膜稳定性,减少了甲和活性氧物种 (ROS) 的积累.
EBR调节了植物激素水平,增加了英多尔-3-酸和吉伯雷林3,同时降低了酸.
转录组分析确定了332个DEG参与ROS稳态,植物激素信号转导和MAPK信号通路,形成了一个复杂的LT耐受性网络.
WGCNA确定了109个核心基因,这些基因对LT压力调节至关重要.

结论:

外源性BRs通过改善生理弹性和关键分子通路的调制,显著提高玉米苗中的LT耐受性.
这项研究为玉米中BR介导的冷应激反应背后的复杂基因调节网络提供了新的见解.
这些发现为培育对低温压力的耐受性提高的玉米品种提供了潜在的策略.

关键词:

2,4-epibrassinolide 的使用情况.通过RNA测序来测序RNA序列.在WGCNA中,WGCNA是WGCNA.高性能液体色谱学高性能液体色谱学低温压力压力低温压力压力玉米玉米玉米是一种实时PCR定量的实时PCR.

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