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首页> 外文期刊>Physiological Zoology >Carbon release from purified chemoautotrophic bacterial symbionts of the hydrothermal vent tubeworm Riftia pachyptila
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Carbon release from purified chemoautotrophic bacterial symbionts of the hydrothermal vent tubeworm Riftia pachyptila

机译：从热液喷管虫Riftia pachyptila的纯化的化学自养细菌共生体释放碳

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摘要

The gutless hydrothermal tubeworm Riftia pachyptila Jones relies mainly on its chemoautotrophic bacterial symbionts to supply nutrients in the form of secreted organic compounds resulting from fixation and incorporation of CO_2. In this study, symbionts were purified, tested for viability, and incubated in the presence of labeled CO_2. We demonstrated that purified symbionts can be used as a viable alternative to experiments with bacterial cultures. Several organic acids, sugars, and amino acids were labeled, but their fraction of the total label stayed generally constant during the incubation times used. However, increasing fractions of succinate and, to a lesser degree, glutamate were excreted into the incubation medium, indicating that these are probably the main carbon-containing compounds transferred from the symbionts to the host. Glutamate could also account for the transport of nitrogen from the symbionts to the host.
机译：无肠的热液虫Riftia pachyptila Jones主要依靠其化学自养细菌共生体以通过固定和掺入CO_2产生的分泌有机化合物的形式提供营养。在这项研究中，共生体被纯化，测试其生存力，并在标记的CO_2存在下孵育。我们证明了纯化的共生体可以用作细菌培养实验的可行替代品。标记了几种有机酸，糖和氨基酸，但在使用的孵育时间内，它们在总标记中所占的比例通常保持恒定。然而，越来越多的琥珀酸盐和较小程度的谷氨酸被排入培养液，这表明这些可能是从共生体转移到宿主的主要含碳化合物。谷氨酸还可以解释氮从共生体向宿主的运输。

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