Diatom fucan polysaccharide precipitates carbon during algal blooms.
Diatom fucan polysaccharide precipitates carbon during algal blooms.
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DOI：
10.1038/s41467-021-21009-6
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发表时间：
2021-02-19
影响因子：
16.6
通讯作者：
Hehemann JH
中科院分区：
文献类型：
--
作者：
Vidal-Melgosa S;Sichert A;Francis TB;Bartosik D;Niggemann J;Wichels A;Willats WGT;Fuchs BM;Teeling H;Becher D;Schweder T;Amann R;Hehemann JH
海洋中下沉颗粒的形成促进了碳固存到更深的水和沉积物中，涉及藻类多糖作为粘合剂，将分子、细胞和矿物质结合在一起。这些尚未鉴定的粘性多糖必须抵抗细菌酶的降解，否则它们在排出碳之前溶解和颗粒分解。在这里，使用单克隆抗体作为分析工具，我们在北海的一系列硅藻水华期间，追踪溶解和颗粒有机物中27个多糖表位的丰度，并发现了一种含岩藻糖的硫酸多糖（FCSP），它能抵抗酶促降解，积累和聚集。以前只知道作为一种大型藻类多糖，我们发现FCSP分泌的几个全球丰富的硅藻物种，包括属角毛藻和海链藻。这些发现为一种新的多糖候选物提供了证据，有助于海洋中的碳封存。海洋碳的命运取决于初级生产力和光合产物的异养分解之间的平衡。在这里，作者表明，硅藻产生一种多糖，抵抗细菌降解，积累，聚集和储存碳在春季开花。
The formation of sinking particles in the ocean, which promote carbon sequestration into deeper water and sediments, involves algal polysaccharides acting as an adhesive, binding together molecules, cells and minerals. These as yet unidentified adhesive polysaccharides must resist degradation by bacterial enzymes or else they dissolve and particles disassemble before exporting carbon. Here, using monoclonal antibodies as analytical tools, we trace the abundance of 27 polysaccharide epitopes in dissolved and particulate organic matter during a series of diatom blooms in the North Sea, and discover a fucose-containing sulphated polysaccharide (FCSP) that resists enzymatic degradation, accumulates and aggregates. Previously only known as a macroalgal polysaccharide, we find FCSP to be secreted by several globally abundant diatom species including the genera Chaetoceros and Thalassiosira. These findings provide evidence for a novel polysaccharide candidate to contribute to carbon sequestration in the ocean. The fate of ocean carbon is determined by the balance between primary productivity and heterotrophic breakdown of that photosynthate. Here the authors show that diatoms produce a polysaccharide that resists bacterial degradation, accumulates, aggregates and stores carbon during spring blooms.
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DOI：
10.1073/pnas.1917001117
发表时间：
2020-03-24
影响因子：
11.1
作者：
Becker, Stefan;Tebben, Jan;Hehemann, Jan-Hendrik
通讯作者：
Hehemann, Jan-Hendrik
DOI：
10.1016/0198-0149(89)90131-3
发表时间：
1989-02-01
期刊：
DEEP-SEA RESEARCH PART A-OCEANOGRAPHIC RESEARCH PAPERS
影响因子：
--
作者：
ALLDREDGE, AL;GOTSCHALK, CC
通讯作者：
GOTSCHALK, CC
影响因子：
4.4
作者：
Bennke, Christin M.;Reintjes, Greta;Fuchs, Bernhard M.
通讯作者：
Fuchs, Bernhard M.
影响因子：
11
作者：
Gaerdes, Astrid;Iversen, Morten H.;Ullrich, Matthias S.
通讯作者：
Ullrich, Matthias S.
影响因子：
64.8
作者：
Chin, WC;Orellana, MV;Verdugo, P
通讯作者：
Verdugo, P