通过协同细胞的花粉管吸引力
T Higashiyama1, S Yabe, N Sasaki
1Department of Biological Sciences, Graduate School of Science, University of Tokyo, Hongo, Tokyo 113-0033, Japan. higashi@biol.s.u-tokyo.ac.jp
Science (New York, N.Y.)
|August 25, 2001
概括
开花植物中的两个协同细胞引导花粉管到胚胎囊中进行受精. 这种吸引信号在受精后停止,可能会防止多精子症.
科学领域:
- 植物繁殖 植物繁殖
- 生殖生物学 生殖生物学
- 开花植物施肥 施肥 花开植物施肥
背景情况:
- 将花粉管引导到胚胎囊中对于开花植物的成功受精至关重要.
- 假设胚胎囊吸引了花粉管在最后的指导阶段在pistil.
研究的目的:
- 为了研究协同细胞在吸引花粉管到胚胎囊中的作用.
- 为了确定协同细胞是否是花粉管吸引信号的来源.
主要方法:
- 激光细胞切除用于去除特定的协同作用细胞.
- 观察到协同细胞去除对花粉管指导的影响.
主要成果:
- 两个与卵细胞相邻的协同细胞被确定为花粉管吸引的来源.
- 一个单独的协同细胞可以产生一个吸引信号,两个细胞可以增强这个信号.
- 在受精后,花粉管的吸引力停止了,即使只剩下一个协同细胞.
结论:
- 协同细胞在受精期间吸引花粉管中起着至关重要的作用.
- 受精后的吸引力停止可能是防止多精子症的机制.
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