カイコの翅原基における蛹化後のDNA合成と細胞分裂

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書誌事項

タイトル別名
  • カイコのし原基におけるよう化後のＤＮＡ合成と細胞分裂
  • DNA synthesis and mitosis after pupation in the wing disc of the silkworm, <i>Bombyx mori</i>
  • カイコ ノ シゲンキ ニ オケル ヨウカゴ ノ DNA ゴウセイ ト サイボウ

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抄録

The differentiating wing discs during the early pupal stage were studied by means of histological and autoradiographic observations. The number of mitosis in the wing was the largest 28 hours after pupation. The mitosis of scale stem cell-1 lasted for 28 to 44 hours after pupation, and that of scale stem cell-2 was detected for 32 to 44 hours after pupation. Scale forming was observed 60 hours after pupation. The rate of 3H-thymidine incorporation became lower in prepupae, but about 10% of the cells incorporated 3H-thymidine during 1st and 2nd days after pupation. On the 3rd day 3H-thymidine was specifically incorporated into scale forming cells. The present study suggests that scale stem cell-1 is formed after pupation, and then mitosis takes place, followed by scale forming and polyploidization of scale forming cells.

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