一种由乙烯诱导的NAC转录因子作为针叶树中的多重非生物应激反应体起作用
Fangxu Han1, Peiyi Wang1, Xi Chen1
1National Engineering Research Center of Tree Breeding and Ecological Restoration, College of Biological Sciences and Technology, Beijing Forestry University, Beijing 100083, China.
Horticulture research
|August 10, 2023
概括
这项研究确定了针叶植物对多种非生物压力的反应中的关键转录因子PtNAC3和PtZFP30. 乙烯信号介导它们的表达,形成一个具有增强植物应力耐受性的潜在调节级联.
科学领域:
- 植物生物学 植物生物学
- 分子生物学分子生物学
- 遗传学 是一个遗传学.
背景情况:
- 植物需要强大的非生物应激反应才能生存,特别是长寿的针叶树.
- 在针叶树中协调多种非生物应激反应的分子机制尚不清楚.
研究的目的:
- 为了研究Pinus tabuliformis.各种非生物压力的转录组反应.
- 确定关键的分子参与者和涉及针叶树应激适应的调节途径.
主要方法:
- 在盐,寒冷,干旱,热冲击和透应激下对Pinus tabuliformis幼苗的转录组分析.
- 外源和内源激素水平测定,包括乙烯前体 (ACC) 处理.
- 基因表达分析,促进体结合试验,以及在Arabidopsis中的过度表达研究.
主要成果:
- 所有测试的压力通常会诱导四个转录因子.
- PtNAC3和PtZFP30高度上调和共同表达,其上调由乙烯介导.
- PtNAC3直接与PtZFP30促进体结合,形成一个调节级联.
- 过度表达PtNAC3增强了在Arabidopsis中统一的非生物应激耐受性,而不会影响生长.
结论:
- PtNAC3和PtZFP30在针叶树的非生物应激反应网络中充当枢纽节点.
- 乙烯信号在调解这些转录因子的反应中起着至关重要的作用.
- PtNAC3具有作为植物育种工具的潜力,可以增强非生物应激耐受性.
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