巻号一覧
16 巻 (2002)
- 4 号 p. 242-
- 2 号 p. 41-
- 1 号 p. 3-
16 巻, 2 号
選択された号の論文の2件中1～2を表示しています
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Shinji Komazaki2002 年 16 巻 2 号 p. 41-46
発行日: 2002年
公開日: 2006/01/31
ジャーナル フリーThe effects of simulated microgravity on blastopore (Bp) formation were analysed in Xenopus laevis and Cynops pyrrhogaster embryos. Simulated microgravity produced by clinostat rotation shifted the Bp-forming region toward the vegetal pole, more markedly in Cynops embryos than in Xenopus embryos. The simulated microgravity induced aggregation of endoderm cells at the center of the embryo and separation between the endoderm and presumptive mesoderm (PM). These findings suggest that clinostat treatment disrupts cell-to-cell interaction between endoderm and PM by increasing the separation between them and, as a result, Bp formation may be shifted towards the vegetal pole.抄録全体を表示PDF形式でダウンロード (986K) -
井尻 憲一2002 年 16 巻 2 号 p. 47-55
発行日: 2002年
公開日: 2006/01/31
ジャーナル フリーIn this review paper, organismal and also cellular mechanisms for perception of gravity are explained. A statolith and a number of hair cells which surround the statolith is a basic structure of statocysts for detecting the direction of gravity or tilting of the body in various animals. The vestibular system of vertebrate was explained, especially on the process from the body-tilting to impulse frequencies which travel to brain. For the cellular responses to gravity, contribution of various organella(??) and cytoskeleton are introduced. Such cellular responses may change when the gravity values become less or null. Gravity perception mechanisms of plants are also explained.抄録全体を表示PDF形式でダウンロード (4326K)
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