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首页> 外文期刊>Comparative biochemistry and physiology, Part C. Pharmacology, toxicology and endocrinology: An international journal >Role of juvenile hormone in the synthesis and sequestration of vitellogenins in the red cotton stainer, Dysdercus koenigii (Heteroptera : Pyrrhocoridae)
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Role of juvenile hormone in the synthesis and sequestration of vitellogenins in the red cotton stainer, Dysdercus koenigii (Heteroptera : Pyrrhocoridae)

机译：幼年激素在红色棉染色剂Dysdercus koenigii（异翅目：Pyrrhocoridae）中卵黄蛋白原的合成和螯合中的作用

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Investigations were carried out to determine the role of juvenile hormone (JH) and 20-hydroxy ecdysone in the synthesis and uptake of vitellogenins, which were earlier identified, purified and characterised, in Dysdercus koenigii. The concentration(s) of vitellogenin(s) in fat body, haemolymph and that of vitellin(s) in ovary were significantly lower after chemical allatectomy at eclosion. In addition, at 70 h after emergence, chemical allatectomy reduced ovarian vitellin concentration, but vitellogenin levels remained normal in the fat body and haemolymph. The haemolymph vitellogenins were not incorporated into oocytes in such insects. Administration of JH-III at 20 h after allatectomy restored vitellogenin levels in the fat body and haemolymph, but the ovary failed to incorporate the available vitellogenins from haemolymph in such insects. However, when JH-III was administered twice, one at 20 h and then at 70 h after allatectomy, vitellogenin concentrations in fat body and haemolymph and also vitellin concentrations in ovary approached control levels. It is suggested that JH has two separate roles, one in vitellogenin synthesis and the other in uptake. 20-hydroxy ecdysone had no apparent role in either vitellogenin synthesis or uptake in D. koenigii. (C) 2000 Elsevier Science Inc. All rights reserved. [References: 52]
机译：进行了调查以确定幼年激素（JH）和20-羟基蜕皮激素在黄Dy中早期鉴定，纯化和表征的黄体素合成和摄取中的作用。脱垂化学脱脂后，脂肪体，血淋巴中卵黄蛋白原的浓度和卵巢中卵黄蛋白的浓度均显着降低。此外，在出苗后70小时，化学异体切除术降低了卵巢中卵黄蛋白的浓度，但卵黄蛋白原水平在脂肪体和血淋巴中保持正常。血淋巴卵黄蛋白原没有掺入此类昆虫的卵母细胞中。异体切除术后20 h施用JH-III可恢复脂肪体内和血淋巴中的卵黄蛋白原水平，但卵巢无法将此类昆虫中来自血淋巴的卵黄蛋白原结合到体内。然而，当两次施用JH-III时，一次在异体切除术后20小时再在70小时后一次，脂肪体和血淋巴中的卵黄蛋白原浓度以及卵巢中的卵黄蛋白浓度也达到了对照水平。建议JH具有两个独立的作用，一个在卵黄蛋白原合成中，另一个在摄取中。 20-羟基蜕皮激素在卵黄蛋白原合成或摄取中无明显作用。 （C）2000 Elsevier Science Inc.保留所有权利。 [参考：52]

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