ウスイタボヤ群体の血管出芽能力

概要

論文の詳細を見る
In botryllid ascidian, Botryllus and Botrylloides, an unique budding called "vascular budding" is well known. In Botryllus primingenus it occure in intact colony. However, in Botryllus schlosseri or Botrylloides simodensis it does not occur in intact colony, but it occurs when all zooids and buds are removed from the colony. Why does it occur only in zooid-freecolony in Botryllus schlosseri? First of all, we investigated the condition under which vascular budding could occur. Not only in the case without any zooids and any buds, but also in that with some zooids and no buds, vascular budding occurred. In the latter case, vascular budding occurs after physiological regression of functional zooids. Next, we investigated the ability of vascular budding during the development of the colony from the oozooid. Colony with one functional zooid (oozzooid or first blastozooid) did not have an ability of vascular budding. While, that with two or more functional zooids could produce vascular buds when all zooids and buds were removed. Ability of vascular budding may be aquired between the colony with one functional blastozooid and that with two functional zooids.
横浜国立大学の論文
1998-03-31