与细菌的相互作用塑造了藻的形状,适应了碳度的变化.
Chenjie Li1, Wenxiu Yin1, Yufang Pan1
1Key Laboratory of Algal Biology, Institute of Hydrobiology, Chinese Academy of Sciences, Wuhan, China.
Nature communications
|December 27, 2025
概括
海洋藻和细菌形成共生关系,使藻能够间接使用葡萄糖. 这种细菌-藻类的合作关系对于碳循环和适应不断变化的碳来源至关重要.
科学领域:
- 海洋微生物学 海洋微生物学
- 共生关系的共生关系.
- 生物地质化学循环 生物地质化学循环
背景情况:
- 藻是海洋中重要的初级生产者.
- 长期的共同进化导致了复杂的藻-细菌伙伴关系.
- 了解这些共生是海洋碳循环的关键.
研究的目的:
- 为了研究Phaeodactylum tricornutum和Loktanella vestfoldensis之间的同位关系.
- 确定这种伙伴关系如何促进藻间接利用葡萄糖.
- 评估海洋环境中藻-细菌相互作用的生态相关性.
主要方法:
- 用藻和细菌进行共同培养实验.
- 基因组数据分析 (塔拉海洋).
- 对P. tricornutum的转录和代谢分析.
主要成果:
- 洛克塔内拉 vestfoldensis 能够使 菲奥达克提勒姆 tricornutum 使用葡萄糖作为唯一的碳源生长.
- 存在相互依赖,L. vestfoldensis依赖P. tricornutum,而二氧化碳是唯一的碳来源.
- 洛克塔内拉与藻 (如Chaetoceros和Thalassiosira) 的频繁共生表明了生态意义.
- 共同培养以葡萄糖支持其他藻 (Chaetoceros muelleri,Thalassiosira pseudonana) 的生长.
- P. tricornutum保持光自,而L. vestfoldensis可能提供CO2和代谢物,如英多尔-3-酸.
结论:
- 细菌-藻类共生可以促进藻适应变化的碳可用性.
- 这些相互作用在海洋碳循环中发挥着重要作用.
- 藻和细菌之间的合成是生态相关的,并影响初级生产.
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