在休眠感应过程中,中国松树针和根的不同昼夜转录模块的日间动态
Junhe Yang1, Kai Qu1, Huili Wang1
1State Key Laboratory of Tree Genetics and Breeding, College of Biological Sciences and Technology, Beijing Forestry University, Beijing, 100083, China.
BMC plant biology
|April 1, 2025
概括
松树通过短日子和低温开始冬季休眠. 这项研究揭示了针和根的节奏基因表达,确定了共享的调节者,这些调节者对中国松 (Pinus tabuliformis) 的休眠状态至关重要.
科学领域:
- 植物生物学 植物生物学
- 分子生态学分子生态学
- 林业科学 林业科学
背景情况:
- 在温带地区的针叶树依靠冬季休眠来维持生存和弹性.
- 短日和低温引发了北半球针叶树的休眠期.
- 已知TFL2是树休眠期间芽和增长停止的调节者.
研究的目的:
- 在休眠诱导过程中调查中国松 (Pinus tabuliformis) 针和根的日间转录组动态.
- 为了确定秋季休眠启动的关键时间节点.
- 揭示了松树休眠的基础分子调节机制.
主要方法:
- 在Pinus tabuliformis.中对PtTFL2的年度表达特征分析.
- 在自然条件下,在24小时内连续12个时间点进行RNA测序 (RNA-seq).
- 权重基因共同表达网络分析 (WGCNA) 以确定基因模块和共享的转录调节器.
主要成果:
- 根据PtTFL2表达,确定了秋季休眠开始的关键时间节点.
- 发现了针和根的节奏振荡基因表达,尽管根缺乏直接的光信号.
- WGCNA揭示了针和根中的高度相关的基因模块,共享35个相同的转录调节器.
结论:
- 松针和根在休眠诱导过程中都表现出节奏基因表达模式.
- 共享的转录调节器在不同松树组织中休眠的分子调节中发挥着重要作用.
- 研究结果提供了对控制松树休眠的复杂调节途径的洞察力,并为进一步的功能基因挖掘提供了目标.
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