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硫代谢和对光的反应在Ulva prolifera绿色潮中的绿色潮

Lu Han¹, Yu Xin², Jinyan Wang¹

¹Frontiers Science Center for Deep Ocean Multispheres and Earth System, Key Laboratory of Marine Chemistry Theory and Technology, Ministry of Education, and College of Chemistry and Chemical Engineering, Ocean University of China, Qingdao, 266100, China; Laboratory for Marine Ecology and Environmental Science, Qingdao Marine Science and Technology Center, Qingdao, 266237, China.

Environmental pollution (Barking, Essex : 1987)

|December 14, 2024

概括

乌尔瓦繁殖的开花显著改变了沿海的硫循环. 增加的光线增加了硫酸盐的吸收和二甲基硫化物 (DMS) 的释放,影响了气候.

科学领域:

海洋生物学海洋生物学
生物地质化学生物地质化学
藻类开花的动力学

背景情况:

乌尔瓦繁殖花朵通过二甲基硫烯酸盐 (DMSP) 和二甲基硫化物 (DMS) 生产显著影响沿海硫循环.
在U. prolifera中精确的硫代谢机制仍然不完全理解.

研究的目的:

在不同的光强度下研究U. prolifera的硫代谢.
分析光线对硫酸盐,DMSP和DMS水平以及基因表达的影响.
建立硫酸盐代谢途径,并识别U. prolifera中的关键基因.

主要方法:

在不同的光条件下 (54,108,162μmol光子m−2s−1) 在U. prolifera中量化细胞内/细胞外硫酸盐,总硫,DMSP和DMS.
转录组分析以探索硫的吸收和代谢途径.
在开花期间估计每日DMS和碳释放量.

主要成果:

光强度增加50% (108到162μmol光子m−2s−1) 导致硫酸盐吸收增加3.5倍,DMS释放增加136%.
尽管硫循环增加,但硫酸盐转运器和同化基因表达没有显著变化,这表明在DMSP合成中未识别的基因.
硫酸盐代谢途径被阐明,确定了四个Alma基因,包括DMSP溶酶.

结论:

U. prolifera 的硫代谢依赖于光线,增加的光线增强了硫酸盐的吸收和DMS的排放.
该研究确定了U. prolifera硫代谢中的关键基因,并估计了在开花期间每天显著的DMS释放.
这些发现凸显了U. prolifera的繁殖可能通过生物硫排放影响区域气候和环境的潜力.

关键词:

甲基二硫化二甲基硫化物甲基硫氨酸二甲基硫氨酸二甲基硫氨酸二甲基硫氨酸二甲基硫氨酸二甲基硫氨酸光的强度光的强度.硫的新陈代谢硫的新陈代谢乌尔瓦的繁殖速度很快.

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