证明硫酸信号在植物发育中的早期进化
Devin V Tulio1, Alexandra M Shigenaga2,3, Shu-Zon Wu1
1Department of Biological Sciences, Dartmouth College, Hanover, NH 03755.
bioRxiv : the preprint server for biology
|November 24, 2025
概括
铁蛋白硫转移酶 (TPST) 酶对植物发育和器官生长至关重要. 由TPST介导的硫酸信号传递在植物物种中保持,影响细胞扩张.
科学领域:
- 植物生物学 植物生物学
- 发展生物学 发展生物学
- 分子植物科学 分子植物科学
背景情况:
- 植物的发育依赖于细胞的增殖和扩张,以形成组织和器官.
- 细胞间通信协调扩张至关重要,但尚未完全理解.
- 硫酸信号调节种子植物的器官生长.
研究的目的:
- 研究TYROSYL蛋白硫转移酶 (TPST) 在非血管植物发育中的作用.
- 确定TPST活动对*Physcomitrium patens*细胞扩张和器官形成的必要性.
- 探索植物中硫酸信号的保存和功能.
主要方法:
- 在 * Physcomitrium patens * 中生成一个零突变 (Δtpst) 来研究 TPST 功能.
- 对 *P.patens* TPST 进行突变分析,以确定关键的功能残留物.
- 通过应用来自不同植物物种的硫酸信号 (PSY1) 来评估发育缺陷的救援.
主要成果:
- *Δtpst*突变体表现出缩小的尺寸,并且未能完全扩展性质细胞.
- 在 *P. patens* TPST 中,histidine 124 被确定为其催化功能必不可少的.
- 来自P. patens和Arabidopsis thaliana的PSY1的应用挽救了突变者中的所有发育缺陷.
结论:
- 在非血管植物 (Physcomitrium patens) 中,TPST对于细胞扩张和发育至关重要.
- 对于PSY的硫化,TPST活动是必要的,这是植物生长的关键步骤.
- PSY信号在进化过程中得到保护,在各种物种的植物发育中起着至关重要的作用.
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