硫化物矿物中的非线性频率翻倍向上转换使深海的氧化光合作用成为可能
Yan Li1,2, Jiaqi Zhu1,2, Qi Li3
1State Key Laboratory of Deep Earth and Mineral Exploration, School of Earth and Space Sciences, Peking University, Beijing 100871, China.
National science review
|June 30, 2025
概括
深海的通风口通过矿物质对红外辐射的向上转换发出可见光. 这种光线可以被蓝藻细菌用于深层生物圈的光合作用.
科学领域:
- 地质化学 地质化学
- 生物物理学的生物物理.
- 矿物物理 矿物物理
背景情况:
- 深海的热水喷口表现出超出热辐射的可见光辐射.
- 这种光产生背后的机制在很大程度上仍然无法解释.
研究的目的:
- 研究水热喷口中可见光产生的矿物介导机制.
- 确定这种光能否支持微生物生命,特别是光合作用.
主要方法:
- 在硫化物矿物中研究了非线性频率翻倍向上转换,使用红外辐射.
- 在不同压力下测量光辐射光谱和光子流量.
- 通过光谱学研究矿物质发射光与蓝藻细菌的相互作用.
- 进行了元基因组学分析,以将微生物群落与矿物成分相关联.
主要成果:
- 硫化物矿物质,特别是石灰矿,通过第二波生成有效地将地热红外辐射转化为可见光.
- 哈尔科皮里特的光辐射在高压下被放大,超过了黑体辐射的三倍.
- 在 *Synechococcus* sp. 中,从石墨烯酸诱导的光中向上转换的光 (532 nm) PCC 7002,表示光系统II的吸收由植物体.
- 其他硫化物矿物质也在可见光谱中表现出向上转换.
- 蓝藻细菌和高温,富含甲酸盐的喷口之间存在着强烈的相关性.
结论:
- 一种新的矿物介导光子机制在深海水热喷口产生生物相关的可见光.
- 这种光可以被深层生物圈中的有氧光合作用蓝藻细菌利用.
- 这些发现表明,在外星环境中可能存在类似的发光和生命支持机制.
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