Ocean Acidification and Warming Lead to Increased Growth and Altered Chloroplast Morphology in the Thermo-Tolerant Alga Symbiochlorum hainanensis.
Ocean Acidification and Warming Lead to Increased Growth and Altered Chloroplast Morphology in the Thermo-Tolerant Alga Symbiochlorum hainanensis.
复制标题
海洋酸化和变暖导致耐热藻类海南共生绿藻生长加快并改变叶绿体形态
DOI：
10.3389/fpls.2020.585202
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发表时间：
2020
影响因子：
5.6
通讯作者：
Li Z
中科院分区：
文献类型：
--
作者：
Gong S;Jin X;Xiao Y;Li Z
海洋酸化和气候变暖影响着藻类的生长和优势。然而，海洋酸化和变暖对耐热藻类生长和基因转录的影响还知之甚少。本文研究了高温(H)和酸化(A)对最近发现的一种与珊瑚相关的耐热藻海南共生氯藻的影响，方法是在两种温度(26.0℃和32.0℃)和两种pH水平(8.16和7.81)下进行培养。结果表明，H、A及其组合处理(AH)对海南链霉菌的生长有正向影响。然而，在高温下，H和A对海南链霉菌的生长没有影响。对海南链霉叶绿体荧光、色素含量和亚细胞形态的分析表明，随着海南链霉叶绿体荧光和色素含量的增加，叶绿体形态发生(放大)可能是促进海南链霉菌生长的普遍机制。转录谱显示，温度升高对海南链霉菌对酸化的反应的影响涉及光合作用和碳水化合物代谢相关基因的下调，而不是抗氧化剂和泛素化过程相关基因的上调。总体而言，本研究首次报道了耐热藻类海南链霉菌的生长、形态和分子响应对未来气候变化的响应，表明海南链球菌在未来与其伴生的珊瑚和/或珊瑚礁中占主导地位。
Ocean acidification and warming affect the growth and predominance of algae. However, the effects of ocean acidification and warming on the growth and gene transcription of thermo-tolerant algae are poorly understood. Here we determined the effects of elevated temperature (H) and acidification (A) on a recently discovered coral-associated thermo-tolerant alga Symbiochlorum hainanensis by culturing it under two temperature settings (26.0 and 32.0°C) crossed with two pH levels (8.16 and 7.81). The results showed that the growth of S. hainanensis was positively affected by H, A, and the combined treatment (AH). However, no superimposition effect of H and A on the growth of S. hainanensis was observed under AH. The analysis of chlorophyll fluorescence, pigment content, and subcellular morphology indicated that the chloroplast morphogenesis (enlargement) along with the increase of chlorophyll fluorescence and pigment content of S. hainanensis might be a universal mechanism for promoting the growth of S. hainanensis. Transcriptomic profiles revealed the effect of elevated temperature on the response of S. hainanensis to acidification involved in the down-regulation of photosynthesis- and carbohydrate metabolism-related genes but not the up-regulation of genes related to antioxidant and ubiquitination processes. Overall, this study firstly reports the growth, morphology, and molecular response of the thermo-tolerant alga S. hainanensis to future climate changes, suggesting the predominance of S. hainanensis in its associated corals and/or coral reefs in the future.
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影响因子：
3.7
作者：
Cornwall, Christopher E.;Revill, Andrew T.;Hurd, Catriona L.
通讯作者：
Hurd, Catriona L.
影响因子：
2.9
作者：
Gong, Sanqiang;Li, Zhiyong;Cheng, Hao
通讯作者：
Cheng, Hao
影响因子：
2.9
作者：
Fu, Fei-Xue;Warner, Mark E.;Hutchins, David A.
通讯作者：
Hutchins, David A.
影响因子：
2.4
作者：
GAO, K;ARUGA, Y;KIYOHARA, M
通讯作者：
KIYOHARA, M
影响因子：
5.8
作者：
Gao, Guang;Clare, Anthony S.;Caldwell, Gary S.
通讯作者：
Caldwell, Gary S.