在C4 Gynandropsis gynandra中的等离子体连接是由光引起的,并且依赖光合作用
Tina B Schreier1, Karin H Müller2, Simona Eicke3
1Department of Plant Sciences, University of Cambridge, Downing Street, Cambridge, CB1 3EA, UK.
The New phytologist
|October 26, 2023
概括
在C4植物中,增强的等离子体形成连接了美索菲尔和捆绑层细胞,以实现高效的光合作用. 这种由光引起的过程对C4光合作用至关重要,如Gynandropsis gynandra所见.
科学领域:
- 植物生物学 植物生物学
- 光合作用研究研究 光合作用研究
- 细胞解剖学 细胞解剖学
背景情况:
- C4光合作用在空间上将碳固定分离为中粒细胞 (M) 和束细胞 (BS).
- 在C4草中已知通过等离子体增强细胞对细胞的连接性,但在C4双叶草中没有得到证实.
- 在C4植物中调节M-BS细胞连接的机制尚不清楚.
研究的目的:
- 为了研究C4双体是否表现出M细胞和BS细胞之间的增强的等离子体连接性.
- 要确定这种增强的连接性是否是C4光合作用的一般要求.
- 阐明C4叶子中M-BS细胞连接背后的机制.
主要方法:
- 利用3D和2D电子显微镜对C4双色球Gynandropsis gynandra和相关的C3物种进行研究.
- 研究了光线和光合作用扰乱剂对等离子体形成的影响.
- 评估了外源糖对等离子体细胞数量的影响.
主要成果:
- 与C3亲属相比,C4 Gynandropsis gynandra在M-BS接口上显示出更高的等离子体频率.
- 形成等离子体是由光引起的,并被光合作用破坏剂抑制的.
- 对等离子体的抑制作用是可逆的与外源的糖糖应用.
结论:
- 在M细胞和BS细胞之间增强的等离子体形成与Gynandropsis gynandra中C4光合作用诱导有关.
- 这表明,在不同植物群体的C4光合作用中,细胞连接的机制被保留了下来.
- 光和光合作用活动在建立M-BS细胞连接方面起着调节作用.
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