在低温条件下,指小米中的化塑料排列在低温条件下
Eri Maai1, Mikiko Kojima2, Yumiko Takebayashi2
1Faculty of International Agriculture and Food Studies, Tokyo University of Agriculture, Tokyo 156-8502, Japan.
Biochimica et biophysica acta. General subjects
|January 8, 2025
概括
低温诱导通过蓝光和actin. 在手指小米中质聚合物安排. 这种对应激适应至关重要的反应,可以在凉爽的早晨保护幼苗免受光阻.
科学领域:
- 植物生物学 植物生物学
- 光合作用 光合作用
- 环境压力生理学环境压力生理学
背景情况:
- 指小米 (一种C4植物) 在高海拔,有压力的环境中壮成长.
- 环境压力,如强光和干旱,触发了指小米中细胞中的质细胞聚合的安排.
研究的目的:
- 为了研究低温对手指小米中美索菲尔 хлоропласт结构的影响.
- 了解温度诱导的叶绿体运动的潜在机制和生理后果.
主要方法:
- 在不同温度和光线条件下对叶子组织的显微观测.
- 光化学效率测量 (例如,光系统II量子效率).
- 酸 (ABA) 水平的量化和药物抑制剂的使用.
主要成果:
- 低温 (5°C) 诱导的叶绿体聚合物以光和活性依赖的方式排列.
- 与中等温度相比,在低温下蓝光强度要求较低.
- 低温降低了光系统II的效率,增加了ABA含量,而当聚合物运动被阻碍时,会出现"甜甜圈般"的排列.
结论:
- 米半烯基质体利用蓝光和依赖于活性素的机制在低温下进行聚合运动.
- 类似甜甜圈的布置是当聚合运动受到抑制时的备用机制.
- 叶绿体聚合的安排是一种应激反应,可以在凉爽的条件下保护幼苗免受光抑制.
相关概念视频
Responses to Heat and Cold Stress
13.3K
Every organism has an optimum temperature range within which healthy growth and physiological functioning can occur. At the ends of this range, there will be a minimum and maximum temperature that interrupt biological processes.
13.3K
Anatomy of Chloroplasts
108.4K
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.
108.4K
Light as Energy
78.0K
The energy required to carry out photosynthesis is light— typically electromagnetic radiation from the sun. The range of all possible wavelengths is known as the electromagnetic spectrum.
Photons
A photon is a discrete electromagnetic particle or bundle of energy. Photons are characterized by their frequency, wavelength, and amplitude, similar to the properties of a wave. Waves with higher frequencies transmit more energy and have shorter wavelengths than longer wavelengths that transmit...
Photons
A photon is a discrete electromagnetic particle or bundle of energy. Photons are characterized by their frequency, wavelength, and amplitude, similar to the properties of a wave. Waves with higher frequencies transmit more energy and have shorter wavelengths than longer wavelengths that transmit...
78.0K
Photosystem II
69.7K
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...
69.7K
The Anatomy of Chloroplasts
5.0K
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...
5.0K
C4 Pathway and CAM
45.2K
Most plants use the C3 pathway for carbon fixation. However, some plants, such as sugar cane, corn, and cacti that grow in hot conditions, use alternative pathways to fix carbon and conserve energy loss due to photorespiration. Photorespiration is the process that occurs when the oxygen concentration is high. Under such conditions, the rubisco enzyme in the Calvin cycle binds O2 instead of CO2, which halts photosynthesis and consumes energy.
C4 Pathway
The C4 pathway is used by plants such as...
C4 Pathway
The C4 pathway is used by plants such as...
45.2K


