光解/蓝光受体2通过弥补 gibberellin 的感知来调节花的开花
Xin Zhao1,2, Wenwen Liu1, Palinuer Aiwaili1
1Beijing Key Laboratory of Development and Quality Control of Ornamental Crops, Department of Ornamental Horticulture, China Agricultural University, Beijing 100193, China.
Plant physiology
|September 18, 2023
概括
吉伯雷林 (GA) 通过影响GA无敏矮人1 (GID1) 受体来调节花的开花. 短日激活GID1,加速植物衰老,促进花朵的发育.
科学领域:
- 植物生物学 植物生物学
- 分子遗传学 分子遗传学
- 发育生物学是发展生物学.
背景情况:
- 吉伯雷林 (GAs) 是关键的植物激素,调节生长和发育.
- 花 (Chrysanthemum morifolium) 的开花是由光周期和老化控制的.
- 草甘在光周期和年龄相关的花期调节中的GAs的作用尚不清楚.
研究的目的:
- 调查气体及其受体GA无敏矮子1 (GID1) 在花开花中的作用.
- 为了阐明分子机制连接光周期,衰老和GA信号在.
主要方法:
- 在不同的光周期和GA治疗下对CmGID1B的基因表达分析.
- 使用酵母双杂交或共同免疫沉来识别与CmGID1B相互作用的蛋白质.
- 对CmGID1B进行基因沉默 (knockdown),以评估其对GA水平和与开花相关的基因表达的影响.
主要成果:
- 光周期影响CmGID1B表达,该表达对GA和植物年龄有反应.
- 光解/蓝光受体2在短短几天内与加密染色体交互的bHLH1相互作用,激活CmGID1B转录.
- 降低CmGID1B会增加内源生物活性GA和GA信号,影响与衰老相关的基因 (MicroRNA156,SPL3).
结论:
- 短暂的一天暴露加速了花从幼儿到成年阶段的过渡.
- 这种加速是由内源性GA水平的增加和增强的GA反应介导的.
- 通过GID1传递GA信号,在整合光周期和花过渡的衰老线索方面发挥着关键作用.
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