ヒドラの形態形成における位置情報

概要

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A new positional information in hydra (bud forming capacity) was examined, using a new type of hydra tissue aggregate which has almost homogenious developmental gradient along its long axis. This aggregate consists of many ring-shaped tissues, which were excised from a specified position on the body column, grafted tandemly like a chain of beads. From the aggregate, head-, bud- and foot-type structures were formed and number of these structures was strongly affected by the origin of the tissue used to prepare the aggregate. Evidence was obtained which suggests that the level of bud forming capacity forms a gradient from the budding zone toward the hypostome. Evidence was also obtained which suggests that the head and foot forming mechanisms cross-react positively.
1989-02-28