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首页> 外文期刊>Coral reefs: journal of the International Society for Reef Studies >Metamorphosis and acquisition of symbiotic algae in planula larvae and primary polyps of Acropora spp.
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Metamorphosis and acquisition of symbiotic algae in planula larvae and primary polyps of Acropora spp.

机译：浮游动物幼虫和原虫的共生藻类的变态和获得。

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摘要

Coral planulae settle, then metamorphose and form polyps. This study examined the morphological process of metamorphosis from planulae into primary polyps in the scleractinian corals Acropora nobilis and Acropora microphthalma, using the cnidarian neuropeptide Hym-248. These two species release eggs that do not contain Symbiodinium. The mode of acquisition of freshly isolated Symbiodinium (zooxanthellae) (FIZ) by the non-symbiotic polyp was also examined. Non-Hym-248 treated swimming Acropora planulae did not develop blastopore, mesenteries or coelenteron until the induction of metamorphosis 16 days after fertilization. The oral pore was formed by invagination of the epidermal layer after formation of the coelenteron in metamorphosing polyps. At 3 days after settlement and metamorphosis, primary polyps exposed to FIZ established symbioses with the Symbiodinium. Two-four days after exposure to FIZ, the distribution of Symbiodinium was limited to the gastrodermis of the pharynx and basal part of the polyps. Eight-ten days after exposure to FIZ, Symbiodinium were present in gastrodermal cells throughout the polyps.
机译：珊瑚扁平状沉淀，然后变质并形成息肉。这项研究使用了刺胞神经肽Hym-248，研究了巩膜珊瑚小角藻（Acropora nobilis）和小角藻（Acropora microphthalma）从扁平苔藓到原发性息肉的变态过程。这两个物种释放不包含共生素的卵。还研究了非共生性息肉获取新鲜分离的共生菌（动物黄藻）（FIZ）的方式。未经Hym-248治疗的游动平足纲直到受精后16天才诱发变态，才形成胚孔，肠系膜或腔肠。在变态的息肉中形成腔肠隆后，通过表皮层的内陷形成口腔。在沉降和变态后3天，暴露于FIZ的原发性息肉与Symbiodinium建立了共生体。暴露于FIZ后两到四天，共生素的分布仅限于咽部的胃真皮和息肉的基底部分。暴露于FIZ后八天，整个息肉的胃皮细胞中都存在共生素。

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