蓖麻蚕五龄幼虫整体及几个主要器官DNA和RNA含量的变化

CHANGES OF DNA AND RNA IN THE WHOLE BODY AND SEVERAL ORGANS OF THE ERI-SILKWORM ATTACUS CYNTHIA RICINI DURING THE FIFTH LARVAL INSTAR

朱洗教授从国外引进蓖麻蚕,为我国蚕业生产做出了巨大贡献。为了更好的发展蓖麻蚕丝的生产,目前对改善蓖麻蚕经济性状的研究,逐渐引起人们的重视。我们(1981)曾将家蚕DNA注射给五龄蓖麻蚕,引起了蓖麻蚕某些遗传性状发生了变异。为了探索外源DNA诱导变异的适宜条件,有必要对这一发育时期的核酸代谢情况进行研究。Tashiro等(1968)和Shigematsu等(1978)对家蚕核酸进行研究。辜祥荣等(1981)对蓖麻蚕后部丝腺核酸含量变化进行过研究。本文研究了五龄蓖麻蚕整体和几个主要器官DNA和RNA含量的变化,同时也研究了^(3)H-胸腺嘧啶及^(3)H-尿嘧啶在不同时间对不同组织DNA和RNA的参入,现将结果报告如下。

The changes of DNA and RNA have been determined in the whole body and in several organs of the Eri-silkworm Attacus cynthia ricini.Both DNA and RNA increased rapidly from forth-fifth instar ecdysis to 4 or 5 days of the fifth instar,especially in integument and silkgland.The incorporation of radioactive precursors (3H-thymidine and 3H-uridine) into the nucleic acids of whole body and different organs has been described.