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首页> 外文期刊>Marine ecology progress series >Comparison of Symbiodinium dinoflagellate flora in sea slug populations of the Pteraeolidia ianthina complex
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Comparison of Symbiodinium dinoflagellate flora in sea slug populations of the Pteraeolidia ianthina complex

机译：翼龙翼龙复杂海sea种群共生鞭毛藻菌群的比较

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摘要

Symbiotic dinoflagellates of the genus Symbiodinium (zooxanthellae) harbored by a nudibranch mollusk, Pteraeolidia ianthina complex, were investigated from host individuals collected at 10 locations in the tropic to temperate waters of the northwestern Pacific. The P. ianthina complex is widely distributed throughout the Indo-Pacific Ocean and, in the northwestern Pacific, contains 2 genetically highly diverged cryptic species with variable genetic structuring. Information on such genetic composition and structuring of the host is useful for assessing whether the relationship between the host and symbiont flora is determined by the genotype of host organisms or by environmental factors. The diversity of the harbored Symbiodinium was analyzed using the sequence differences of internal transcribed spacer region 2 in the nuclear ribosomal gene, chloroplast ribosomal gene large subunit 23S Domain V, and mitochondrial cytochrome b gene. Symbionts of clades A, C, and D were detected in this nudibranch host. Among them, 6 types were identified (1 clade A, 3 clade C, and 2 clade D types); 2 of them are suggested to be novel. The occurrence of each Symbiodinium type differed among the geographical locations, and hence the co-occurrence pattern (i.e. composition) of the symbionts also varied geographically. The geographical pattern of symbiont composition was correlated with the genetic structuring of the host as well as climatic environmental factors. Therefore, these results suggest that both environmental conditions and the host mollusk's genetics affect the symbiont composition.
机译：研究了从热带10个地点收集的温带西北太平洋温带水域的寄主个体调查的一个裸udi软体动物翼手蕨（Pteraeolidia ianthina）复合体所藏的共生菌属（zooxanthellae）共生鞭毛藻。 P. ianthina复合体广泛分布在整个印度洋-太平洋中，在西北太平洋中，包含2个遗传高度分化的隐性物种，具有可变的遗传结构。关于宿主的这种遗传组成和结构的信息对于评估宿主和共生菌群之间的关系是由宿主生物的基因型还是由环境因素决定是有用的。利用核糖体基因，叶绿体核糖体基因大亚基23S域V和线粒体细胞色素b基因内部转录间隔区2的序列差异分析了所藏共生菌的多样性。在此裸udi分枝宿主中检测到进化枝A，C和D的共生体。其中，鉴定出6种类型（1种进化枝A，3种进化枝C和2种进化枝D）。建议其中的2个是新颖的。每种共生素类型的发生在地理位置之间是不同的，因此共生体的共现模式（即组成）在地理上也有所不同。共生体组成的地理格局与寄主的遗传结构以及气候环境因素有关。因此，这些结果表明环境条件和宿主软体动物的遗传学都影响共生体组成。

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