Mizuno Takashi, Watanabe Kunio, Ohnishi Eiji
Biological Institute, Faculty of Science, Nagoya University, Furo-cho, Chikusa-ku, Nagoya, 464, Japan.
Dev Growth Differ. 1981;23(5):543-552. doi: 10.1111/j.1440-169X.1981.00543.x.
Ecdysteroids were studied in relation to embryonic development and diapause of the silkworm, Bombyx mori. The majority of the ecdysteroids was found to be in the conjugated form, and minor part, in the free form. In the developing eggs, 2-deoxyecdysone, 2-deoxy-20-hydroxy-ecdysone and 3-epi-ecdysone were found to have the free ecdysteroid form as well as the conjugated ecdysteroid form. Ecdysone and 20-hydroxyecdysone almost exclusively had the conjugated form. The concentration of ecdysteroids in the embryo was higher than that in yolkplasm in the early embryonic stages. During the embryonic diapause, the concentration of free ecdysteroids decreased to a low level while the conjugated form maintained the original level.
研究了蜕皮甾体与家蚕胚胎发育及滞育的关系。发现大多数蜕皮甾体呈结合形式，少数呈游离形式。在发育中的卵中，2-脱氧蜕皮酮、2-脱氧-20-羟基蜕皮酮和3-表蜕皮酮既有游离蜕皮甾体形式，也有结合蜕皮甾体形式。蜕皮酮和20-羟基蜕皮酮几乎完全呈结合形式。在胚胎发育早期，胚胎中蜕皮甾体的浓度高于卵黄质中的浓度。在胚胎滞育期间，游离蜕皮甾体的浓度降至低水平，而结合形式则维持原来的水平。
