相关实验视频
Updated: Jul 26, 2025

03:54
Observation of Photobehavior in Chlamydomonas reinhardtii
Published on: May 6, 2022
4.0K
血膜 - 叶绿体相互作用通过characean细胞的超极化反应激活
Alexander A Bulychev1, Natalia A Krupenina1, Stepan Yu Shapiguzov1
1Faculty of Biology, Lomonosov Moscow State University, Moscow, Russia.
Plant physiology and biochemistry : PPB
|June 17, 2023
概括
植物细胞超极化,一个独特的电信号,影响叶绿体活动和光合作用光. 这种电反应可以用于研究离子运输和质体相互作用 in vivo.
科学领域:
- 植物生理学 植物生理学
- 生物电力是一种生物电力.
- 光合作用研究研究 光合作用研究
背景情况:
- 植物信号涉及到等离子体膜的电现象,影响光合作用.
- 藻表现出动作潜力和独特的超极化对电流的反应.
- 血超极化与植物中的各种生理事件有关.
研究的目的:
- 为了研究超极化反应对Chara australis中的光细胞光效应的影响.
- 探索超极化作为一种工具的潜力,以研究活体中等离子体膜-质体相互作用.
- 阐明将等离子体膜电状态与叶绿体功能联系起来的机制.
主要方法:
- 通过应用电流,诱导Chara australis内部节的超极化反应.
- 将等离子lemma转换为一个K+导电状态.
- 测量最大 (Fm') 和实际 (F') 叶绿素光产量的短暂变化.
- 分析依赖光的光瞬态和H+流入.
主要成果:
- 超极化反应诱导了质体光 (Fm'和F') 的短暂变化.
- 这些光变化依赖于光,表明与光合作用电子和H+运输有联系.
- 细胞超极化促进了H+的流入,这种流入在单次刺激后是暂时的,并且被禁用.
- 结果表明,超极化通过细胞质离子变化和包膜载体间接影响质细胞层的pH值.
结论:
- 血超极化驱动跨膜离子流,改变细胞质离子组成.
- 这种变化通过信封载体间接影响质细胞层的pH值和叶绿素的光.
- 这项研究证明了短期超极化实验在体内揭示外离子输送器功能的实用性.
相关概念视频
Anatomy of Chloroplasts
110.1K
Green algae and plants, including green stems and unripe fruit, harbor chloroplasts—the vital organelles where photosynthesis takes place. In plants, the highest density of chloroplasts is found in the mesophyll cells of leaves.
110.1K
The Anatomy of Chloroplasts
5.3K
Green algae and plants, including green stems and unripe fruit, harbor specialized organelles called chloroplasts to carry out photosynthesis. They coordinate both stages of photosynthesis — the light-dependent reactions and the light-independent reactions. The light-dependent reactions use sunlight to release oxygen and produce chemical energy in the form of ATP and NADPH, and the light-independent reactions capture CO2 and use ATP and NADPH to produce sugar.
Structure of...
Structure of...
5.3K
Photosystem II
71.4K
The multi-protein complex photosystem II (PS II) harvests photons and transfers their energy through its bound pigments to its reaction center, and ultimately to photosystem I (PSI) through the electron transport chain. The pigments responsible for caputirng the light energy in photosystems include chlorophyll a, chlorophyll b, and carotenoids.
The pigment molecules are arranged across two photosystem domains — the antenna complex and the reaction center. The main aim of the pigment...
The pigment molecules are arranged across two photosystem domains — the antenna complex and the reaction center. The main aim of the pigment...
71.4K
Plasmodesmata
32.8K
The organs in a multicellular organism’s body are made up of tissues formed by cells. To work together cohesively, cells must communicate. One way that cells communicate is through direct contact with other cells. The points of contact that connect adjacent cells are called intercellular junctions.
32.8K
Tonicity in Plants
53.7K
Tonicity describes the capacity of a cell to lose or gain water. It depends on the quantity of solute that does not penetrate the membrane. Tonicity delimits the magnitude and direction of osmosis and results in three possible scenarios that alter the volume of a cell: hypertonicity, hypotonicity, and isotonicity. Due to differences in structure and physiology, tonicity of plant cells is different from that of animal cells in some scenarios.
53.7K
Cell Signaling in Plants
5.7K
Plant cells communicate to coordinate their cycle of growth, flowering and fruiting, and activities in roots, shoots, and leaves in response to the changing environmental conditions. Plant signaling is distinct from animal signaling. Plants primarily utilize enzyme-linked receptors, whereas the largest class of cell-surface receptors in animals are G-protein coupled receptors (GPCRs). Unlike animals, receptor tyrosine kinases are rare in plants. Instead, plants have a diverse class of...
5.7K

