Chemoautotrophic Symbiosis in a Hydrothermal Vent Gastropod
Chemoautotrophic Symbiosis in a Hydrothermal Vent Gastropod
复制标题
热液喷口腹足动物的化能自养共生
DOI：
10.2307/1541963
复制
发表时间：
1988
期刊：
影响因子：
--
通讯作者：
J. Childress
中科院分区：
文献类型：
--
作者：
J. Stein;S. Cary;R. Hessler;R. Vetter;H. Felbeck;S. Ohta;J. Childress
从最近在西太平洋发现的深海热液喷口收集到的一种未被描述的腹足类物种，在专门的鳃细胞中含有内共生细菌。蜗牛栖息在岩石的通风口，在那里它们直接暴露在从通风口排放的温暖(2-25°C)富硫化物(750微米)水中。这种蜗牛的鳃含有元素硫和高活性的催化硫化物代谢(硫化物氧化酶、三磷酸腺苷-硫基酶、APS-还原酶、罗丹宁)和自养二氧化碳固定(核酮糖二磷酸羧基酶)的酶，这表明这种细菌的功能是硫氧化的化学自养内共生体--这种共生关系以前只在Vstientiferan和Pongophoran管虫、寡丝虫和双壳软体动物中描述过。这是在众多腹足类物种中发现的第一个关于化学自养潜力的文献，这些物种生活在还原和氧化环境的交界处。
An undescribed gastropod species collected from recently discovered deep-sea hydrothermal vents in the western Pacific contains endosymbiotic bacteria within specialized gill cells. The snails inhabit rocky vent openings where they are exposed directly to warm (2-25°C) sulfide-rich (750 µM) water emitted from the vents. The gills of this snail contain elemental sulfur and high activities of enzymes catalyzing sulfide metabolism (sulfide oxidase, ATP-sulfurylase, APS-reductase, rhodanese) and autotrophic CO2 fixation (ribulose bisphosphate carboxylase) indicating that the bacteria function as sulfur oxidizing Chemoautotrophic endosymbionts—a symbiosis described previously only in vestimentiferan and pogonophoran tubeworms, oligocheate worms, and bivalve molluscs. This represents the first documentation of Chemoautotrophic potential among the numerous gastropod species found inhabiting the interface of reducing and oxidizing environments.