Worldwide Occurrence and Activity of the Reef-Building Coral Symbiont Symbiodinium in the Open Ocean

被引:41
|
作者
Decelle, Johan [1 ,2 ,3 ]
Carradec, Quentin [3 ,4 ]
Pochon, Xavier [5 ,6 ]
Henry, Nicolas [1 ,3 ]
Romac, Sarah [1 ,3 ]
Mahe, Frederic [7 ]
Dunthorn, Micah [8 ]
Kourlaiev, Artem [9 ]
Voolstra, Christian R. [10 ]
Wincker, Patrick [3 ,4 ]
de Vargas, Colomban [1 ,3 ]
机构
[1] Sorbonne Univ, CNRS, Stn Biol Roscoff, AD2M,UMR 7144, F-29680 Roscoff, France
[2] Univ Grenoble Alpes, Cell & Plant Physiol Lab UMR 5168, CNRS, CEA,INRA, F-38054 Grenoble 9, France
[3] Res Federat Study Global Ocean Syst Ecol & Evolut, GOSEE FR2022, 3 Rue Michel Ange, F-75016 Paris, France
[4] Univ Paris Saclay, Univ Evry, Genom Metab, Genoscope,Inst Francois Jacob,CEA,CNRS, F-91057 Evry, France
[5] Cawthron Inst, Coastal & Freshwater Grp, Private Bag 2, Nelson 7042, New Zealand
[6] Univ Auckland, Inst Marine Sci, Private Bag 349, Warkworth 0941, New Zealand
[7] CIRAD, UMR LSTM, F-34398 Montpellier, France
[8] Tech Univ Kaiserslautern, Dept Ecol, Kaiserslautern, Germany
[9] CEA, Inst Francois Jacob, Genoscope, F-91057 Evry, France
[10] KAUST, Red Sea Res Ctr, Div Biol & Environm Sci & Engn BESE, Thuwal 239556900, Saudi Arabia
基金
欧盟地平线“2020”;
关键词
FREE-LIVING SYMBIODINIUM; MOLECULAR PHYLOGENY; GENETIC DIVERSITY; DINOPHYCEAE; PHOTOSYMBIOSIS; POPULATIONS; DIVERGENCE; EVOLUTION; SERVICES;
D O I
10.1016/j.cub.2018.09.024
中图分类号
Q5 [生物化学]; Q7 [分子生物学];
学科分类号
071010 ; 081704 ;
摘要
The dinoflagellate microalga Symbiodinium sustains coral reefs, one of the most diverse ecosystems of the biosphere, through mutualistic endosymbioses with a wide diversity of benthic hosts [1]. Despite its ecological and economic importance, the presence of Symbiodinium in open oceanic waters remains unknown, which represents a significant knowledge gap to fully understand the eco-evolutionary trajectory and resilience of endangered Symbiodinium-based symbioses. Here, we document the existence of Symbiodinium (i.e., now the family Symbiodiniaceae [2]) in tropical- and temperate-surface oceans using DNA and RNA metabarcoding of size-fractionated plankton samples collected at 109 stations across the globe. Symbiodinium from clades A and C were, by far, the most prevalent and widely distributed lineages (representing 0.1% of phytoplankton reads), while other lineages (clades B, D, E, F, and G) were present but rare. Concurrent metatranscriptomics analyses using the Tara Oceans gene catalog [3] revealed that Symbiodinium clades A and C were transcriptionally active in the open ocean and expressed core metabolic pathways (e.g., photosynthesis, carbon fixation, glycolysis, and ammonium uptake). Metabarcodes and expressed genes of clades A and C were detected in small and large plankton size fractions, suggesting the existence of a free-living population and a symbiotic lifestyle within planktonic hosts, respectively. However, high-resolution genetic markers and microscopy are required to confirm the life history of oceanic Symbiodinium. Overall, the previously unknown, metabolically active presence of Symbiodinium in oceanic waters opens up new avenues for investigating the potential of this oceanic reservoir to repopulate coral reefs following stres-induced bleaching.
引用
收藏
页码:3625 / +
页数:12
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