尖端局部受体控制花粉管的生长和LURE感应
Hidenori Takeuchi1,2, Tetsuya Higashiyama1,2,3
1Division of Biological Science, Graduate School of Science, Nagoya University, Furo-cho, Chikusa-ku, Nagoya, Aichi 464-8602, Japan.
Nature
|March 11, 2016
概括
授粉管的生长是由雌性吸引物引导的. 研究人员发现花粉特异性受体类激酶6 (PRK6) 感知LURE1,将花粉管的生长指向植物繁殖的卵子.
科学领域:
- 植物繁殖
- 细胞信号传输
- 分子生物学
背景情况:
- 细胞的定向生长对于组织和组织沟通至关重要.
- 在开花的植物中,花粉管的生长是由雌性受精指导的.
- 雌性分泌的作为对花粉管的特定吸引剂.
研究的目的:
- 确定负责感知雌性吸引物和指导花粉管生长的受体.
- 阐明花粉管对特定物种指导信号的反应机制.
主要方法:
- 在Arabidopsis thaliana中进行半活体实验.
- 对花粉特定受体类激酶6 (PRK6) 的基因分析.
- 在PRK6, ROPGEF和ROP1 GTPase之间进行相互作用研究.
主要成果:
- PRK6对于感知LURE1吸引性和卵子向至关重要.
- PRK6 与 ROPGEFs 相互作用,激活花粉管生长的 ROP1 GTPase.
- 在相关物种中,PRK6对AtLURE1产生反应,并与其他PRK受体合作.
- 在花粉管重定向之前,PRK6对AtLURE1进行非对称的积累.
结论:
- PRK6作为AtLURE1吸引剂的关键膜受体.
- PRK6调用了尖端生长机制,包括ROP信号蛋白.
- 这项研究揭示了通过多个受体对花粉管生长和物种特定吸引力的洞察力.
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