Development of planulae within a mesogleal coat in the soft coral Heteroxenia fuscescens
Development of planulae within a mesogleal coat in the soft coral Heteroxenia fuscescens
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软珊瑚 Heteroxenia fuscescens 中胶层内浮浪的发育
DOI：
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发表时间：
1989
期刊：
影响因子：
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通讯作者：
Y. Achituv
中科院分区：
文献类型：
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作者：
Y. Benayahu;T. Berner;Y. Achituv
本文用扫描电镜和光学显微镜对两性二形的软蟹类Heteroxenia fuscescens的胚胎学进行了研究。最初的胚胎发育在这个珊瑚发生，而胚胎迁移自由内的anthocodiae和触角。未成熟的浮板被挤出外部到管间的空间，在那里它们成熟。当胚胎被来自母体群体的原始卵中胶层覆盖时，从卵到浮浪的浮浪形态发生的所有阶段都发生了。从这层中胶层被膜孵化的时间晚于着床前。H. fuscescens展示了高度专业化的育雏护理，包括将胚胎保留在内部息肉腔以及外部空间中。这种高度专业化的育雏护理，加上胚胎涂层，可以为胚胎提供更好的保护，并为殖民地提供更大的繁殖力。
Embryology of the hermaphroditic and dimorphic alcyonacean Heteroxenia fuscescens has been examined by scanning electron microscopy and light microcopy. Initial embryonic development in this octocoral occurs while the embryos migrate freely inside the anthocodiae and the tentacles. Immature planulae are extruded externally into intersiphonozooid spaces, where they mature. All stages of planular morphogenesis, from egg to planula, occur while the embryo is coated by the original egg mesogleal coat derived from the parent colony. Hatching from this mesogleal coat occurs as late as immediately prior to planulation. H. fuscescens demonstrates highly specialized brood care involving the retention of embryos in internal polyp cavities as well as in external spaces. This highly specialized brood care, coupled with the embryo coating, may provide better protection for the embryo and greater fecundity for the colony.