细胞因素促进雅斯蒙酸积累,控制玉米叶的生长
Aimee N Uyehara1, Angel R Del Valle-Echevarria1, Charles T Hunter2
1Department of Tropical Plant and Soil Sciences, University of Hawai'i at Mānoa, Honolulu, HI 96822, USA.
Plants (Basel, Switzerland)
|August 26, 2023
概括
玉米突变体中的细胞因素 (CK) 超信号减少了叶子的生长,通过减少细胞分裂. 这与斯蒙酸 (JA) 的增加有关,斯蒙酸是一种抑制细胞分裂的激素,这表明CK促进了JA的积累.
科学领域:
- 植物生物学 植物生物学
- 激素信号传递 激素信号传递
- 遗传学 遗传学 是一个
背景情况:
- 植物器官的大小是由细胞分裂和扩张的协调作用决定的,由激素相互作用调节.
- 细胞因素 (CK) 和素酸 (JA) 是影响生长过程的关键植物激素.
研究的目的:
- 调查细胞因素 (CK) 超信号传递在调节玉米叶子生长中的作用.
- 阐明CK和莉酸 (JA) 在控制细胞分裂和器官大小方面的关系.
主要方法:
- 使用了半主导的毛Frayed1 (Hsf1) 玉米突变体,表现出CK超信号.
- 在野生型和突变型玉米上进行了外源性激素治疗 (CK和JA).
- 分析了对CK治疗的反应中JA通路组件的基因表达.
主要成果:
- 在HSF1突变体中CK超信号,通过减少细胞分裂,减少了叶子大小和生长速度.
- Hsf1突变体显示斯蒙酸 (JA) 水平增加,与抑制细胞分裂相关.
- 外源JA应用减少了玉米叶的生长,而JA缺乏增加了它.
- 在玉米芽中,CK治疗诱导了JA生物合成基因表达,这表明存在信号链接.
结论:
- 细胞因素 (CK) 可以通过抑制细胞分裂来抑制玉米叶的生长,可能通过促进斯酸 (JA) 积累来调解.
- CK可能增强JA生物合成基因表达,突出了植物激素信号传递中影响器官发育的新型交叉交谈机制.
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