树木季节性基因表达的分子机制
Xian Chu1,2, Minyan Wang1, Zhengqi Fan1
1State Key Laboratory of Tree Genetics and Breeding, Research Institute of Subtropical Forestry, Chinese Academy of Forestry, Hangzhou 311400, China.
International journal of molecular sciences
|February 10, 2024
概括
环境因素调节树周期,影响生存和生产力. 分子路径和基因表达的表观遗传变化是森林树木季节性适应的关键,特别是在气候变化下.
科学领域:
- 植物生物学 植物生物学
- 分子生态学分子生态学
- 林业林业 林业 林业 林业
背景情况:
- 树循环 (活跃/休眠状态) 对于生产力和生存至关重要,受日长和温度等环境线索的影响.
- 保存的周期性基因表达模式来自于对环境因素作出反应的分子途径的并行或融合进化.
- 每年基因表达节奏的变化越来越多地被认为是森林树木适应性进化的驱动因素.
研究的目的:
- 审查调节树木季节性过程的分子机制 (芽生长,芽休眠,芽断裂).
- 专注于季节性基因表达模式和与芽休眠相关的表观遗传修饰.
- 提供气候变化下的树木生长研究前景.
主要方法:
- 关于树木生长和休眠的季节性调节研究的文献综述.
- 在休眠相关基因中对基因表达模式和表观遗传修饰 (DNA甲基化,基因素乙化/甲基化) 的研究分析.
- 综合了关于环境因素反应 (日长,温度) 的研究结果.
主要成果:
- 发芽生长,芽休眠和芽休息的季节性调节是由响应日长和温度的分子机制调节的.
- 表观遗传修饰,包括DNA甲基化和基因素修饰,显示休眠相关位点的季节性变化,影响基因调节.
- 年度节律基因表达模式与木质植物的适应性进化有关.
结论:
- 了解季节性基因表达和表观遗传调节对于理解树木适应至关重要.
- 未来的研究应该解决气候变化对树木生长年周期的影响.
- 对芽休眠期的分子洞察力为改善森林树木生产力和弹性提供了基础.
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