高温胁迫下虫黄藻与珊瑚共生菌的热适应研究
张丽

广西大学 资源环境与材料学院，广西南宁，530004；

摘要：本研究探讨了高温（32℃）胁迫下，两种虫黄藻（Cladocopium goreaui（C. goreaui）和Durusdinium trenchii（D. trenchii））及其共培养体系的生长、色素浓度和光化学效率的变化。结果表明，C. goreaui在共培养体系中表现出显著的热适应优势，CPT组的细胞密度和比生长率显著高于对照组（P<0.05），且色素浓度恢复较好。相反，D. trenchii的共培养组在高温下细胞密度下降，光合色素显著衰退。光化学效率（Fv/Fm）显示，C. goreaui在高温初期受抑制，而D. trenchii在高温后期光化学效率有所恢复。研究表明，珊瑚共生菌对虫黄藻的热适应具有菌株和宿主依赖性，为优化珊瑚共生功能、提升珊瑚礁耐热性提供了理论依据。

关键词：高温胁迫；Cladocopium goreaui；Durusdinium trenchii；共培养体系；光化学效率；色素浓度

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