Basic pattern of fluctuation in hemolymph PTTH titers during larval-pupal and pupal-adult development of the silkworm, Bombyx mori
Basic pattern of fluctuation in hemolymph PTTH titers during larval-pupal and pupal-adult development of the silkworm, Bombyx mori
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DOI：
10.1016/s0016-6480(02)00043-6
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发表时间：
2002-06-15
影响因子：
2.7
通讯作者：
Kataoka, H
中科院分区：
文献类型：
--
作者：
Mizoguchi, A;Dedos, SG;Kataoka, H
通过家蚕不同小种间和不同环境条件下饲养家蚕的血淋巴PTTH滴度变化规律的比较，分析了家蚕幼虫-蛹和蛹-成虫发育过程中血淋巴PTTH滴度变化的一般特征。与所有类型的家蚕一样，我们观察到PTTH滴度在末龄的吞食期较低，在游荡前一天略有上升，在游走期和预蛹阶段有两个中等大小的滴度高峰，在蛹-成虫发育早期，PTTH滴度较高，成虫羽化前不久滴度逐渐增加。血淋巴PTTH滴度的增加与蜕皮类固醇滴度的增加密切相关，并与随后发生的以变态开始或进展为特征的形态和行为变化密切相关。游荡当天血淋巴PTTH滴度升高的时间受光周期控制，但后期的时间似乎不受明暗周期的影响。(C)2002年埃尔塞维尔科学公司(美国)。版权所有。
General features of the changes in hemolymph PTTH titers during larval-pupal and pupal-adult development of the silkworm Bombyx mori were analyzed by comparing the patterns of the titer changes between different races and between silkworms reared under different environmental conditions. In common to all types of the silkworms tested, we observed low PTTH titers during the phagoperiod of the final instar, a small rise in PTTH titer on the day before wandering, two middle-sized peaks of the titer at the wandering and prepupal stages, high PTTH titers during early pupal-adult development, and a gradual titer increase shortly before adult eclosion. Increases in hemolymph PTTH titer were closely correlated with increases in ecdysteroid titers and with subsequent occurrences of morphological and behavioral changes characteristic of the initiation or progression of metamorphosis. The timing of the increase in hemolymph PTTH titer on the day of wandering was photoperiodically controlled, but that timing at the later stages seemed not to be influenced by the light-dark cycle. (C) 2002 Elsevier Science (USA). All rights reserved.