沙漠绿藻奥哈地小球藻干湿转换过程中外溢和激发能耗散的增加。

IF 2.7 2区生物学 Q2 BIOCHEMISTRY & MOLECULAR BIOLOGY

Biochimica et Biophysica Acta-Bioenergetics Pub Date : 2025-09-17 DOI:10.1016/j.bbabio.2025.149573

Soma Kawamura , Makio Yokono , Chiyo Noda , Jun Minagawa

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引用次数: 0

摘要

•在干旱情况下，缺乏电子源（水）会降低进化氧气的光合作用的能力。•因此，即使在弱光下，也可能产生多余的激发能，这是有害的，因为它会导致活性氧的产生。•沙漠绿藻小球藻（Chlorella ohadii）在干燥过程中，首先光系统II通过LHCII与光系统I结合，建立能量传递途径，然后启动猝灭剂诱导的激发能量耗散。•这种策略可以在干燥的早期阶段为整个光合机构提供有效的保护，此时可用的猝灭剂可能不足。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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Increase in spillover and excitation energy dissipation during wet–dry transitions in the desert green alga Chlorella ohadii

•
Under drought, lack of an electron source (water) reduces the capacity of oxygen-evolving photosynthesis.
•
Consequently, even under low light, excess excitation energy may be generated, which is harmful as it leads to generation of reactive oxygen species.
•
When the desert green alga Chlorella ohadii undergoes desiccation, first photosystem II binds to photosystem I via LHCII to establish energy transfer pathways, and then excitation energy dissipation induced by a quencher is initiated.
•
This strategy may provide efficient protection of the entire photosynthetic apparatus during early stages of desiccation, when the available quencher may be insufficient.

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来源期刊

Biochimica et Biophysica Acta-Bioenergetics 生物-生化与分子生物学

CiteScore

9.50

自引率

7.00%

发文量

363

审稿时长

92 days

期刊介绍： BBA Bioenergetics covers the area of biological membranes involved in energy transfer and conversion. In particular, it focuses on the structures obtained by X-ray crystallography and other approaches, and molecular mechanisms of the components of photosynthesis, mitochondrial and bacterial respiration, oxidative phosphorylation, motility and transport. It spans applications of structural biology, molecular modeling, spectroscopy and biophysics in these systems, through bioenergetic aspects of mitochondrial biology including biomedicine aspects of energy metabolism in mitochondrial disorders, neurodegenerative diseases like Parkinson''s and Alzheimer''s, aging, diabetes and even cancer.