在玉米耳中,受精和未受精的卵巢之间的兄弟杀戮
Cheng Huang1, Zhi-Wei Wang1, Yi-Hsuan Lin1
1College of Agronomy and Biotechnology, China Agricultural University, 100193, Beijing, China.
Communications biology
|March 31, 2025
概括
玉米粒积极抑制未受精的卵巢,减少对资源的竞争. 这种兄弟竞争涉及荷尔蒙和信号通路,影响植物发育和产量.
科学领域:
- 植物生物学 植物生物学
- 农业科学 农业科学
- 发展生物学 发展生物学
背景情况:
- 植物经常过度生产卵巢,但选择性地消除不太可行的卵巢,以确保后代的质量.
- 这种"兄弟竞争"的自然过程可以通过减少谷物数量来对作物产量产生负面影响.
- 顺序授粉植物中受精和未受精卵巢之间的特定相互作用仍然不太清楚.
研究的目的:
- 调查玉米中受精和未受精卵巢之间的相互作用.
- 了解如何在谷物发育过程中调节资源分配,以应对卵巢竞争.
主要方法:
- 玉米耳部分受精 (HP),留下一些未受精的卵巢.
- 用C-同位素标记来追踪卵巢之间的资源移动.
- 对受精和未受精的卵巢进行了转录分析和激素水平测量.
主要成果:
- 部分受精的玉米耳显示未受精的卵巢的生长减少,受精的谷物的增强发展.
- 13C同位素标记证实了资源从未受精的卵巢转移到受精的卵巢.
- 未受精的卵巢表现出细胞壁退化和衰老,与改变的辅酶,斯蒙酸和MAPK信号通路.
- 受精的谷物显示激活了MAPK信号,增加了糖的利用,并促进了细胞的增殖.
结论:
- 发展的玉米粒积极抑制邻近未受精的卵巢的生长.
- 这种抑制是由荷尔蒙信号 (auxin,雅斯蒙酸) 和信号通路 (MAPK) 介导的.
- 谷物优先分配资源,以确保自己的发展,可能通过提高糖的利用和细胞的增殖.
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