Potential of veg2 Blastomeres to Induce Endoderm Differentiation in Sea Urchin Embryos(Developmental Biology)
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概要
- 論文の詳細を見る
Two different modes of gastrulation in sea urchin embryos have been reported. The first mode, reported in Hemicentrotus pulcherrimus and some other species, consists of two phases : a primary and a secondary invagination. The second mode involves gastrulation with a continuous convolution of cells near the blastopore ; this mode has been reported to occur in the embryos of the sand dollar, Scaphechinus mirabilis. The rudimentary gut is comprised of fewer cells in the embryos of the former species than in the latter. We assumed that the differences in gastrulation modes could be related to the different potentials of the veg2 layer to induce endoderm differentiation in the upper layer. In the present study, we produced chimeric embryos consisting of an animal cap recombined with veg2 layer blastomere (s) to compare the inductive effect of the veg2 layer and/or the blastomere (s) in H. pulcherrimus and S. mirabilis embryos. Our results showed that the inductive effect of the veg2 layer is stronger in S. mirabilis embryos than in H. pulcherrimus embryos. Moreover, it was suggested that the difference in the strength of inductive effects of veg2 layers is related to the difference in gastrulation modes.
- 社団法人日本動物学会の論文
- 2002-01-25
著者
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Amemiya Shonan
Department Of Biological Sciences Graduate School Of Science University Of Tokyo:department Of Integ
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Iijima Minoru
Department Of Biological Sciences Graduate School Of Science University Of Tokyo
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Iijima Minoru
Department Of Applied Chemistry Faculty Of Engineering Tohoku University
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Amemiya Shonan
Department Of Biological Sciences And Misaki Marine Biological Station University Of Tokyo
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Amemiya Shonan
Department Integrated Biosciences Graduate School Of Frontier Sciences University Of Tokyo
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