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转录因子PsLBD42促进了树中低诱导的酸生物合成

Zimao Feng¹, Zhaoyou Yu¹, Mingjun Li²

¹College of Forestry, Northwest A&F University, Yangling 712100, China.

Tree physiology

|March 13, 2026

概括

一种涉及PsLBD42转录因子和安东生物合成的新机制增强了木对低压力的耐受性. 这一途径通过调节营养缺乏下的安托西亚宁积累来提高植物的弹性.

科学领域:

植物生物学植物生物学
分子遗传学分子遗传学
生物化学生物化学

背景情况:

植物通过复杂的机制适应的波动,包括对氨酸生物合成的调节.
侧面器官边界域 (LBD) 转录因子在低条件下调节安素生物合成中的作用尚不清楚.

研究的目的:

为了研究Populus simonii LBD转录因子,PsLBD42的功能,以应对低应激.
阐明PsLBD42对抗生素生物合成的调节机制及其对树压力耐受性的贡献.

主要方法:

使用过度表达和抑制转基因木线的PsLBD42的功能性表征.
分析生理特征,包括光合作用速率,光氧化和含量.
包括酵母单杂交,双化酶和ChIP-qPCR在内的分子试验证实了PsLBD42与基因促进体 (PsUGT78D2和PsUGT79B3) 的直接结合.

主要成果:

PsLBD42的过度表达增强了低应激抵抗力,增加了光合作用和减少了光氧化,显著增加了素积累.
PsLBD42 直接结合到安托素通路基因 PsUGT78D2 和 PsUGT79B3.3 的促进者.
过度表达PsUGT78D2和PsUGT79B3增加了抗素含量,而它们的抑制降低了它,并恢复了PsLBD42-抑制的线条中的抗素含量.

结论:

该PsLBD42-PsUGT78D2/PsUGT79B3模块代表了一种新的机制,用于调节树叶中的安托素积累.
这种调节模块通过调节素水平来提高树对低压力的耐受性.

关键词:

PsUGT78D2 在线阅读 PsUGT79B3 在线阅读侧面器官的边界域域是侧面器官的边界域.叶子叶子叶子监管机制监管机制监管机制

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