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DMSP biosynthesis by an animal and its role in coral thermal stress response

机译:DMSP由动物生物合成及其在珊瑚热应激反应中的作用

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摘要

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 dimethylsulphide. 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.%二甲基巯基丙酸(DMSP)是一种广泛分布的代 谢物,被海洋细菌转化成挥发性气体二甲基硫 化物(DMS),后者是大气中硫的一个主要来 源,有助于云的形成,从而影响气候。Jean Baptiste Raina等人在本文中报告了DMSP由两 种常见造礁珊瑚Acropora millepora和Acropora tenuis的形成。这一发现是个意外__人们 以前认为,DMSP是完全由藻类(包括珊瑚中 的共生藻类)和一些植物产生的。DMSP的生 物合成也许可帮助珊瑚虫耐受"热应激"条 件。这一发现可能有助于了解DMSP的生成怎 样响应全球变化对珊瑚及其共生体所产生的 影响。
机译:在全球范围内,造礁珊瑚是最多产的二甲基磺丙酸二甲酯(DMSP)的生产者,DMSP是海洋硫循环中的核心分子,是具有气候活性的二甲基硫气体的前体。目前,珊瑚产生的DMSP完全归因于藻类共生菌Symbiodinium2。结合化学,基因组学和分子学方法,我们表明,在没有藻类共生体的情况下,珊瑚类幼体产生DMSP。在没有藻类内共生子的新近定居的珊瑚中,DMSP水平随时间增加高达54%,当青少年受到热应激时,DMSP的水平进一步上升,高达76%。我们发现了最近在DMSP生物合成中发现的两个藻类基因的珊瑚直向同源物,强烈表明珊瑚具有生产DMSP所必需的酶机制。我们的结果颠覆了光合生物是DMSP唯一生物来源的范例,并强调了全球珊瑚覆盖率下降所代表的双重危险,因为通过珊瑚生产的DMSP缓解热应激的潜力相应下降。 (DMSP)是一种广泛分布的代谢物,被海洋细菌转化成挥发性气体二甲基硫磺化物(DMS),只是大气中硫的一个主要来源,有助于云的形成,从而让·巴蒂斯特·雷纳(Jean Baptiste Raina)等人在这里中报告了DMSP由两种常见造礁珊瑚Acropora millepora和Acropora tenuis的形成。这一发现是个意外__人们以前认为,DMSP是完全由藻类(包括珊瑚中的DMSP的生物合成也允许帮助珊瑚虫耐受“热应力”条件。这一发现可能有助于了解DMSP的生成怎样响应全球变化对珊瑚及其共生体。所产生的影响。

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  • 来源
    《Nature》 |2013年第7473期|677-680a1|共5页
  • 作者单位

    AIMS@JCU, and School of Marine and Tropical Biology, James Cook University, Townsville, Queensland 4811, Australia,Australian Institute of Marine Science, PMB3, Townsville MC, Townsville,Queensland 4810, Australia,ARC Centre of Excellence for Coral Reef Studies, School of Marine and Tropical Biology, James Cook University, Townsville, Queensland 4811, Australia;

    Australian Institute of Marine Science, PMB3, Townsville MC, Townsville,Queensland 4810, Australia;

    ARC Centre of Excellence for Coral Reef Studies, School of Marine and Tropical Biology, James Cook University, Townsville, Queensland 4811, Australia,Australian National University, Canberra, Australian Capital Territory 2601, Australia;

    Australian Institute of Marine Science, PMB3, Townsville MC, Townsville,Queensland 4810, Australia,ARC Centre of Excellence for Coral Reef Studies, School of Marine and Tropical Biology, James Cook University, Townsville, Queensland 4811, Australia,AIMS@JCU, and School of Pharmacy and Molecular Sciences,James Cook University, Townsville, Queensland 4811, Australia;

    Australian Institute of Marine Science, PMB3, Townsville MC, Townsville,Queensland 4810, Australia;

    School of Biological Sciences and Biotechnology, Murdoch University, Perth, Western Australia 6050, Australia;

    AIMS@JCU, and School of Marine and Tropical Biology, James Cook University, Townsville, Queensland 4811, Australia,Australian Institute of Marine Science, PMB3, Townsville MC, Townsville,Queensland 4810, Australia;

    Centre for Microscopy, Characterisation and Analysis, The University of Western Australia, 35 Stirling Highway, Crawley, Western Australia 6009, Australia;

    0ceans Institute, the University of Western Australia, 35 Stirling Highway, Crawley, Western Australia 6009, Australia. Present addresses: Natural Science and Public Health, Zayed University, PO Box 144534, Abu Dhabi, United Arab Emirates (D.A.);

    Kewalo Marine Lab, University of Hawaii at Manoa, 41 Ahui Street, Honolulu, Hawai'I 96813, USA(F.O.S.);

    Australian Institute of Marine Science, PMB3, Townsville MC, Townsville,Queensland 4810, Australia;

  • 收录信息 美国《科学引文索引》(SCI);美国《工程索引》(EI);美国《生物学医学文摘》(MEDLINE);美国《化学文摘》(CA);
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