- 期刊
Budding Cycle and Bud Morphology of the Globe-shaped Sponge Cinachyra australiensis
澳洲球形海綿芽體生殖週期與芽體形態結構
摘要
自1987至1989年間，我們在南臺灣恆春半島萬里桐岩岸潮間帶區，研究調查澳洲球形海綿Cinachyra australiensis（Carter, 1886）芽體生殖週期。澳洲球形海綿會產生無性生殖的黃色小芽體；每一個小芽體是由突起的大骨針，將其突出於海綿成體砂質表面。一般而言，澳洲球形海綿的芽體最早出現於晚春，最多見於晚夏初秋之際，入冬之後，則逐漸消失。芽體略呈卵圓狀，沉性，並未如芽球（gemmule）為海綿纖維所包圍，但含有與成體相似的骨針種類。在電子顯微鏡的觀察下，芽體由四種主要細胞所組成：原始細胞（archaeocyte）、含有許多細胞內涵物的特殊細胞（special cell）、介於特殊細胞與原始細胞之間的中間型細胞（intermediate cell）和卵形細胞（oval-shaped cell）。前三種細胞多分佈於芽體的中央，而卵形細胞則較分佈在外圍。
並列摘要
The asexual budding cycles of the globe-shaped sponge Cinachyra australiensis (Carter, 1886) were studied from 1987 to 1989 in the rocky intertidal area at Wanlitung, Hengchun Peninsula, southern Taiwan (22°00'N, 120040'E). The small yellow buds are protruded by megascleres and are scattered over the entire surface of adults. The budding period generally started in late spring, peaked between late summer and early fall, and ended in early winter. Detached buds are oval in shape and negatively buoyant. Buds contain megascleres and microscleres similar to those of adults. At the ultrastructural level, 4 principal cell types can be identified within the buds: archaeocytes, special cells with numerous small cell inclusions, oval-shaped cells, and intermediate cells. The intermediate cells are characterized by intermediate numbers of cell inclusions and phagosomes as in archaeocytes and special cells. The oval-shaped cells are distributed more peripherally within buds than are the other 3 cell types.