Physiological and endocrine changes associated with polydnavirus/venom in the parasitoid-host system Chelonus inanitus-Spodoptera littoralis.
Physiological and endocrine changes associated with polydnavirus/venom in the parasitoid-host system Chelonus inanitus-Spodoptera littoralis.
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寄生物-宿主系统Chelonus inanitus-Spodoptera littoralis中与多DNA病毒/毒液相关的生理和内分泌变化。
DOI：
10.1016/s0022-1910(97)00144-3
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发表时间：
1998
影响因子：
2.2
通讯作者：
C. Grossniklaus
中科院分区：
文献类型：
--
作者：
B. Lanzrein;K. Treiblmayr;V. Meyer;R. Pfister;C. Grossniklaus
如前所述，卵幼虫寄生蜂C。inanitus在其寄主中引起5龄变态的早熟开始，随后在预蛹阶段发育停滞。多脱氧核糖核酸病毒/毒液被证明是负责的发育停滞。我们调查了多脱氧核糖核酸病毒/毒液如何影响宿主幼虫的生长，发现头囊宽度从第4至第6体育场和重量较低的第6体育场在多脱氧核糖核酸病毒/毒液的幼虫比非寄生的幼虫。在试图确定内分泌参数，修改多DNA病毒/毒液，可能是负责在预蛹的发育停滞，我们比较了保幼激素，保幼激素酯酶和蜕皮激素之间的非寄生和多DNA病毒/毒液的幼虫从4龄，直到化蛹或发育停滞。明显的差异变得明显，只有在第6龄的蛹细胞形成阶段，即12天后进入的多DNA病毒/毒液到宿主卵。然后，含多DNA病毒/毒液的幼虫的前胸腺释放较少的蜕皮类固醇和蜕皮类固醇滴度低于非寄生幼虫，这是其次是延迟，减少和despersized增加prepupal保幼激素和保幼激素酯酶和蜕皮激素的代谢略有修改。这表明多DNA病毒/毒液仅在蛹承诺后影响宿主的内分泌系统，并且抑制前胸腺活性是第一个可检测到的效果。
As shown earlier, parasitization by the egg–larval parasitoid C. inanitus causes in its host the precocious onset of metamorphosis in the 5th instar followed by developmental arrest in the prepupal stage. Polydnavirus/venom were shown to be responsible for the developmental arrest. We investigated how polydnavirus/venom affect growth of the host larvae and found that head capsule widths were smaller from the 4th to 6th stadium and weights were lower in the 6th stadium in polydnavirus/venom-containing larvae than in non-parasitized larvae. In an attempt to identify endocrine parameters that are modified by polydnavirus/venom and might be responsible for the developmental arrest in the prepupa, we compared juvenile hormones, juvenile hormone esterase and ecdysteroids between non-parasitized and polydnavirus/venom-containing larvae from the 4th instar until pupation or developmental arrest, respectively. Obvious differences became manifest only in the 6th instar at the pupal cell formation stage, i.e. 12 days after entry of polydnavirus/venom into the host egg. Then, prothoracic glands of polydnavirus/venom-containing larvae released less ecdysteroids and ecdysteroid titres were lower than in non-parasitized larvae; this was followed by a delayed, reduced and desynchronized increase in prepupal juvenile hormones and juvenile hormone esterase and a slightly modified metabolism of ecdysone. This indicates that polydnavirus/venom affects the endocrine system of the host only after pupal commitment and that inhibition of prothoracic gland activity is the first detectable effect.
最后幼虫龄期间天蛾前胸腺细胞变化的调节和后果：综述。
DOI：
10.1002/arch.940300214
发表时间：
1995
期刊：
Archives of insect biochemistry and physiology.
影响因子：
--
作者：
Smith,WA
通讯作者：
Smith,WA