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TaCLE24b信号级联调节小麦的横向根部发育和干旱耐受性

Wen Yang¹, Man Feng¹, Kuohai Yu¹

¹Frontiers scientific center for molecular design breeding, China Agricultural University, Beijing, 100193, China.

Nature communications

|February 25, 2025

概括

小麦根的发育受到TaCLE24b和TaCLV1受体的微调,影响横向根的生长和耐旱性. 一种GSK3蛋白TaSG-D1也是这个过程中的关键.

科学领域:

植物分子生物学植物分子生物学
植物生理学植物生理学
农业科学农业科学

背景情况:

植物激素对根部发育和应激适应至关重要.
侧根形成是一个复杂的过程,受到各种信号通路的影响.

研究的目的:

识别和描述调节小麦侧根发育的新型信号元件.
阐明TaCLE24b,TaCLV1和TaSG-D1在小麦根架构和干旱应对中的作用.

主要方法:

识别编码CLE和LRR受体类激酶的小麦基因.
通过功能丧失突变分析基因功能.
蛋白质与蛋白质相互作用和酸化试验.
在正常和干旱条件下对根部发育的表型分析.

主要成果:

在小麦中,TaCLE24b和TaCLV1被确定为侧面根原始形成和外生长的关键调节者.
在TaSG-D1 (一种Ser/Thr蛋白激酶糖原合成激酶3) 的功能丧失突变也促进了横向根部的发育.
TaCLV1与TaSG-D1相互作用并酸化,导致其降解.
TaCLE24b增强了TaSG-D1的TaCLV1结合和酸化,积极调节横向根部发育和耐旱性.

结论:

在小麦中,TaCLE24b-TaCLV1-TaSG-D1信号通路在微调横向根部发育中起着重要作用.
这一途径有助于小麦适应干旱压力.
这些发现提供了关于根生长和应激反应中的信号的新见解.

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