Key Laboratory of Tropical Marine Bio-Resources and Ecology, South China Sea Institute of Oceanology, Chinese Academy of Sciences, Guangzhou 510301, China; Southern Marine Science and Engineering Guangdong Laboratory, Guangzhou 511458, China.
Key Laboratory of Tropical Marine Bio-Resources and Ecology, South China Sea Institute of Oceanology, Chinese Academy of Sciences, Guangzhou 510301, China.
Mar Pollut Bull. 2022 Sep;182:114032. doi: 10.1016/j.marpolbul.2022.114032. Epub 2022 Aug 12.
Ocean warming is an extreme environment event that has profound and lasting impacts on Symbiodiniaceae. However, their response mechanisms to elevated temperature exposure are poorly understood. In this study, the physiological and transcriptional responses of Effrenium voratum (Symbiodiniaceae) to ocean warming were examined. After exposure to 30 °C, no significant variations in growth, chlorophyll a, or photosynthetic and respiration rates were observed, while a higher temperature (34 °C) significantly reduced these physiological measurements. Meanwhile, lipid content and fatty acid composition were altered at high temperature (i.e., elevated degree of fatty acid saturation). Such biochemical constituents likely contributed to the mitigation of the negative effects of elevated temperatures. Furthermore, higher expression levels of genes related to the synthesis and elongation of fatty acids were detected at high temperature. The adjustment of lipids and fatty acid composition may be a potential mechanism by which E. voratum may survive under future global warming. ONE SENTENCE SUMMARY: The adjustment of lipids and fatty acid composition may be a potential mechanism by which E. voratum acclimate to future global warming.
海洋变暖是一种极端环境事件，对共生藻有深远而持久的影响。然而，它们对高温暴露的反应机制还知之甚少。在这项研究中，研究了 Effrenium voratum（共生藻）对海洋变暖的生理和转录反应。在暴露于 30°C 后，生长、叶绿素 a 或光合作用和呼吸速率没有显著变化，而更高的温度（34°C）则显著降低了这些生理测量值。同时，在高温下（即脂肪酸饱和度升高），脂质含量和脂肪酸组成发生了变化。这些生化成分可能有助于减轻高温的负面影响。此外，在高温下检测到与脂肪酸合成和伸长相关的基因表达水平升高。脂质和脂肪酸组成的调节可能是 E. voratum 在未来全球变暖下适应的潜在机制。
