双壳贝 Lucinoma aequizonata 的化能自养共生体中的硝酸盐呼吸不受氧气调节。
Nitrate Respiration in Chemoautotrophic Symbionts of the Bivalve Lucinoma aequizonata Is Not Regulated by Oxygen.
出版信息
Appl Environ Microbiol. 1995 Apr;61(4):1630-3. doi: 10.1128/aem.61.4.1630-1633.1995.
Abstract
The marine bivalve Lucinoma aequizonata has intracellular chemoautotrophic symbionts residing in the gill tissue. These bacteria are capable of nitrate respiration even under fully saturated oxygen conditions. Nitrate reductase in the symbionts of L. aequizonata appears to be constitutively expressed and without significant regulation by oxygen or nitrate. We discuss the stationary-phase growth state of the symbionts as an explanation for the lack of enzyme induction.
摘要
海洋双壳类动物 Lucinoma aequizonata 拥有栖息在鳃组织内的化能有机共生细菌。这些细菌即使在完全饱和的氧气条件下也能进行硝酸盐呼吸。L. aequizonata 共生体中的硝酸还原酶似乎是组成型表达的，不受氧气或硝酸盐的显著调节。我们讨论了共生体的静止期生长状态，以此来解释缺乏酶诱导的原因。
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