二甲基巰基丙酸(DMSP)是一種廣泛分布的代謝物,，被海洋細菌轉化成揮發(fā)性氣體二甲基硫化物(DMS),，后者是大氣中硫的一個主要來源,，有助于云的形成,，從而影響氣候,。
Jean-Baptiste Raina等人在本文中報告了DMSP由兩種常見造礁珊瑚Acropora millepora 和 Acropora tenuis的形成,。這一發(fā)現(xiàn)是個意外——人們以前認為,，DMSP是完全由藻類（包括珊瑚中的共生藻類）和一些植物產(chǎn)生的。
DMSP的生物合成也許可幫助珊瑚蟲耐受“熱應激”條件,。這一發(fā)現(xiàn)可能有助于了解DMSP的生成怎樣響應全球變化對珊瑚及其共生體所產(chǎn)生的影響,。（生物谷Bioon.com）
生物谷推薦的英文摘要
Nature doi:10.1038/nature12677
DMSP biosynthesis by an animal and its role in coral thermal stress response
Jean-Baptiste Raina，Dianne M. Tapiolas,，Sylvain Forêt,，Adrian Lutz，David Abrego,，Janja Ceh,，F(xiàn)ranois O. Seneca，Peta L. Clode,，David G. Bourne,，Bette L. Willis & Cherie A. Motti
Globally， reef-building corals are the most prolific producers of dimethylsulphoniopropionate (DMSP),， a central molecule in the marine sulphur cycle and precursor of the climate-active gas dimethylsulphide3,， 4. At present,， DMSP production by corals is attributed entirely to their algal endosymbiont， Symbiodinium2. Combining chemical,， genomic and molecular approaches,， we show that coral juveniles produce DMSP in the absence of algal symbionts. DMSP levels increased up to 54% over time in newly settled coral juveniles lacking algal endosymbionts， and further increases,， up to 76%,， were recorded when juveniles were subjected to thermal stress. We uncovered coral orthologues of two algal genes recently identified in DMSP biosynthesis， strongly indicating that corals possess the enzymatic machinery necessary for DMSP production. Our results overturn the paradigm that photosynthetic organisms are the sole biological source of DMSP,， and highlight the double jeopardy represented by worldwide declining coral cover,， as the potential to alleviate thermal stress through coral-produced DMSP declines correspondingly.
