动物的DMSP生物合成及其在珊瑚热应激反应中的作用
Jean-Baptiste Raina1, Dianne M Tapiolas, Sylvain Forêt
11] AIMS@JCU, and School of Marine and Tropical Biology, James Cook University, Townsville, Queensland 4811, Australia [2] Australian Institute of Marine Science, PMB3, Townsville MC, Townsville, Queensland 4810, Australia [3] ARC Centre of Excellence for Coral Reef Studies, School of Marine and Tropical Biology, James Cook University, Townsville, Queensland 4811, Australia.
Nature
|October 25, 2013
概括
珊瑚幼虫在没有藻类共生体的情况下产生二甲基硫 propionate (DMSP),挑战了以前的假设. 这种来自珊瑚的DMSP可能有助于减轻热应激,但珊瑚覆盖面的减少会降低这种保护能力.
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
- 珊瑚礁生态 珊瑚礁生态
背景情况:
- 在海洋硫循环和气候调节中,二甲基硫烯酸盐 (DMSP) 是至关重要的.
- 以前,珊瑚的DMSP产量仅归因于它们的藻类内共生体 (Symbiodinium).
研究的目的:
- 调查独立于藻类共生体的珊瑚幼虫中DMSP的产生.
- 为了确定珊瑚是否拥有DMSP生物合成的遗传机制.
- 评估珊瑚衍生DMSP在热应激反应中的作用.
主要方法:
- 在珊瑚幼虫中对DMSP水平的化学分析.
- 基因组分析以确定珊瑚中的DMSP生物合成基因.
- 确认基因存在和功能的分子技术.
主要成果:
- 缺乏Symbiodinium的珊瑚幼虫产生了DMSP,随着时间的推移,它的水平会增加.
- 在非共生性青少年中,DMSP的产生在热应激下显著增加 (高达76%).
- 确定了关键藻类DMSP生物合成基因的珊瑚基因,表明珊瑚的内在能力.
结论:
- 珊瑚,不仅仅是它们的共生体,可以产生DMSP,颠覆了长期以来的科学范式.
- 珊瑚产生的DMSP可能提供一种应对热应激的机制.
- 珊瑚覆盖面的减少减少了这种自然弹性,加剧了气候变化的影响.
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