The marine bacterium Alteromonas espejiana induces metamorphosis of the hydroid Hydractinia echinata
The marine bacterium Alteromonas espejiana induces metamorphosis of the hydroid Hydractinia echinata
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DOI：
10.1007/bf00346332
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发表时间：
1993-02
期刊：
影响因子：
2.4
通讯作者：
T. Leitz;T. Wagner
中科院分区：
文献类型：
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作者：
T. Leitz;T. Wagner
海产棘球水蚤从浮萍幼虫阶段发育成原生息肉。浮游生物在无菌过滤海水中不会变态。变态通常是由某些细菌引起的，这些细菌通常发生在寄居蟹属Eupagurus的软体动物的贝壳上。从H。并筛选出诱导浮萍幼虫变态能力较强的细菌克隆。其中一个克隆被进一步亚克隆，以获得较强的变态诱导能力，最后对其诱导特性和鉴定目的进行了研究。这种细菌是一种能动的、产气的革兰氏阴性杆菌，带有极地鞭毛。根据几个生理特性，该菌株被鉴定为一株赤链霉菌属的菌株。诱导变态的能力可能并不局限于A。埃斯佩贾纳。蛋白激酶C抑制剂鞘氨醇可抑制BYA诱导的变态反应。埃斯佩贾纳。变态诱导的原理可能是脂类，因为在硅胶-氨丙基柱上提取和分离不同种类的脂类后，得到了变态诱导组分。
The marine hydroidHydractinia echinatadevelops into a primary polyp from a planula larva stage. The planula does not undergo metamorphosis in sterile filtered seawater. Metamorphosis is induced by certain bacteria occurring, as a rule, on the shells of molluscs inhabited by hermit crabs of the genusEupagurus. Bacteria were isolated from shells occupied byH. echinata, and bacterial clones were selected which had a strong potency for inducing metamorphosis in planula larvae. One such clone was further subcloned for strong metamorphosis-inducing potency and finally investigated for inductive characteristics and for identification purposes. The bacterium is a motile, aerogen, gram-negative rod with a polar flagellum. It was identified on the basis of several physiological characteristics as a strain of the genusAlteromonas espejiana. The ability to induce metamorphosis might not be restricted toA. espejiana. The inhibitor of protein kinase C, sphingosine, inhibited metamorphosis induced byA. espejiana. The metamorphosis-inducing principle is likely to be a lipid, since upon lipid extraction and separation of different lipid classes by solid phase extraction on silica-aminopropyl columns a metamorphosis-inducing fraction was obtained.