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首页> 外文期刊>Coral reefs: journal of the International Society for Reef Studies >Developmentally regulated localization of endosymbiotic dinoflagellates in different tissue layers of coral larvae
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Developmentally regulated localization of endosymbiotic dinoflagellates in different tissue layers of coral larvae

机译：内生共生鞭毛虫在珊瑚幼虫不同组织层中的发育调控定位

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摘要

In adult cnidarians, symbiotic dinoflagellate Symbiodinium are usually located in the gastrodermis. However, the onset of this endosymbiotic association and its regulation during larval development are unclear. This study examined the distribution of the Symbiodinium population in tissue layers of planula larvae released from the stony coral Euphyllia glabrescens. Symbiodinium were redistributed from the epidermis to the gastrodermis, at a rate that was fastest during early planulation and then decreased prior to metamorphosis. This process indicates that the endosymbiotic activity of coral tissues is developmentally regulated. During the early larval stage, both the epidermis and gastrodermis contained Symbiodinium; then, as the larvae developed toward metamorphosis, the numbers in the epidermis gradually diminished until they were only found in the gastrodermis. The mechanism of redistribution remains unknown, but may be due to a direct translocation and/or change in the proliferation of symbionts in different tissue layers.
机译：在成年的刺胞动物中，共鞭毛鞭毛共生菌通常位于胃真皮中。但是，尚不清楚这种内共生关联的发生及其在幼虫发育过程中的调控。这项研究检查了共生菌种群在石质珊瑚Euphyllia glabrescens释放的扁平幼虫组织层中的分布。共生素从表皮重新分布到胃真皮，其速率在早期计划期间最快，然后在变态之前降低。此过程表明珊瑚组织的共生共生活性受到发育调节。在幼虫早期，表皮和胃皮均含有共生素;然后，随着幼虫向变态的发展，表皮中的数量逐渐减少，直到仅在胃真皮中发现。重新分布的机制仍是未知的，但可能是由于不同组织层中共生体的直接移位和/或增殖变化所致。

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