胡卜素能否保护与植物相关的细菌免受氧化应激的影响?
Gwénola Simon1, Laurie Casalot1, Corinne Valette1
1Aix Marseille Univ, Université de Toulon, CNRS, IRD, MIO, Marseille, France.
概括
细菌性胡卜素可以保护植物浮游生物产生的单片氧和紫外线损伤. 颜色细菌表现出增强的保护,解释了它们在藻类繁殖中的流行.
科学领域:
- 微生物学 微生物学
- 海洋生物学 海洋生物学
- 生物化学 生物化学
背景情况:
- 植物浮游生物的开花在衰老过程中产生反应性氧物种.
- 与植物浮游生物相关的细菌面临来自单片氧和紫外线辐射的氧化应激.
- 胡卜素颜料是众所周知的抗氧化剂.
研究的目的:
- 为了研究细菌类胡卜素对植物浮游生物产生的单片氧的保护作用.
- 为了比较单分子氧对非颜色和颜色细菌的影响.
- 了解胡卜素对植物浮游植物相关环境中的细菌生存的贡献.
主要方法:
- 研究了两种细菌物种:非颜色的*Pseudomonas stutzeri*和颜色的*Dinoroseobacter shibae*.
- 暴露在藻*Thalassiosira* sp.产生的单片氧气中的细菌. 在照明下.
- 分析了细菌膜脂质光氧化 (单不和脂肪酸) 和DNA修复系统的激活.
- 评估了"D. shibae"中spheroidenone的作用.
主要成果:
- 非颜色的 *P. stutzeri* 经历了显著的细胞质单点氧暴露,导致快速的DNA修复激活.
- 染色体D. shibae的单片氧透率减少,原因是膜清除和球状腺灭,导致DNA修复延迟.
- 细菌膜MUFA和胡卜素有效地减轻了单点氧和紫外线损伤.
结论:
- 细菌类胡卜素,特别是球胺,在保护来自植物浮游生物的单片氧和紫外线辐射方面发挥着至关重要的作用.
- 这些保护机制有助于胡卜素产生的细菌,如 Rhodobacteriales,在与藻类繁殖相关的细菌浮游生物群落中占主导地位.
- 这突显了微生物光保护在海洋环境中的生态意义.
相关概念视频
Cancer Prevention
6.0K
Several factors can increase the risk of cancer in an individual. About 50% of cancer cases can be prevented by adopting a healthy lifestyle, regular exercise, eating healthy, and following a modest cancer prevention diet. Epidemiological studies have consistently shown that populations with vegetable and fruit-rich diets have reduced the incidence of cancer. On the other hand, populations who have a diet rich in animal fat, red meat, junk food, or high calories are predisposed to cancer.
Some...
Some...
6.0K
Defenses Against Pathogens and Herbivores
22.4K
Plants present a rich source of nutrients for many organisms, making it a target for herbivores and infectious agents. Plants, though lacking a proper immune system, have developed an array of constitutive and inducible defenses to fend off these attacks.
22.4K
Photoreceptors and Plant Responses to Light
19.9K
Light plays a significant role in regulating the growth and development of plants. In addition to providing energy for photosynthesis, light provides other important cues to regulate a range of developmental and physiological responses in plants.
19.9K
Defense Against Bacterial Pathogens
1.3K
The human immune system is a complex network of cells, tissues, and organs that work together to defend the body against bacterial infections. It consists of various immune cells, each playing a specific role in the defense mechanism.
Phagocytes
Phagocytes are the frontline soldiers of the immune system. They include neutrophils and macrophages. Neutrophils are the most abundant type of white blood cell and are quickly mobilized to the site of infection. Macrophages are larger cells that patrol...
Phagocytes
Phagocytes are the frontline soldiers of the immune system. They include neutrophils and macrophages. Neutrophils are the most abundant type of white blood cell and are quickly mobilized to the site of infection. Macrophages are larger cells that patrol...
1.3K
Defense Mechanism Against Infection
5.7K
Natural flora, body system defenses, and inflammation are natural barriers of the body against infectious agents regardless of previous exposure. Normal floras of the human body refer to the microbial population that colonizes the skin and mucous membranes.
In addition, many body organ systems have unique defenses against infection. The skin is an intact, multilayered surface preventing invasion by microorganisms unless impaired. Mucous membranes lining the mouth, nose, and eyelids are barriers...
In addition, many body organ systems have unique defenses against infection. The skin is an intact, multilayered surface preventing invasion by microorganisms unless impaired. Mucous membranes lining the mouth, nose, and eyelids are barriers...
5.7K
Photosystem II
69.5K
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...
69.5K


