Changes in the role of the thyroid axis during the metamorphosis of the Japanese eel, Anguilla japonica.
Changes in the role of the thyroid axis during the metamorphosis of the Japanese eel, Anguilla japonica.
复制标题
日本鳗鲡变态过程中甲状腺轴作用的变化。
DOI：
10.1002/jez.1862
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发表时间：
2014
影响因子：
--
通讯作者：
Tsukamoto K.
中科院分区：
文献类型：
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作者：
Sudo R;Okamura A;Kuroki M;Tsukamoto K.
若虫科蝴蝶Araschnia austajana和凤蝶科蝴蝶Papilio xuthus表现出季节性二型性，包括从滞育蛹发育的春季型和从非滞育蛹发育的夏季型。季节性形态的发育在A. longjanana是由分泌蜕皮类固醇的时间来调节的，而在P. xuthus是由分泌夏季形态产生激素来调节的，该激素存在于大脑中并受光周期的控制。我们研究了是否有一种来自大脑的大脑因子在调节A.使用外科手术治疗。将在4°C下冷冻超过3个月的冷冻滞育蛹对通过手术彼此连接，然后发育成春季型或类春季型成虫。将低温滞育蛹与1日龄非滞育蛹结合，发育成夏型或类夏型成虫。当非滞育蛹的大脑在化蛹后6-8小时在注射和不注射20-羟基蜕皮激素的情况下被手术切除时，它们中的大部分分别发育成春季型或春季型成虫。此外，90%的非滞育蛹在化蛹后5分钟内颈部结扎时发育成弹簧型或弹簧状型成虫。这些结果表明，除了用于成虫发育的20-羟基蜕皮激素外，在蛹早期从大脑分泌的显示夏季形态产生激素活性的大脑因子在确定非滞育蛹的夏季形态发育中起着重要作用。J. Exp. Zool.321A：276-282，2014.© 2014 Wiley Periodicals，Inc.
The nymphalid butterflyAraschnia burejanaand the papilionid butterflyPapilio xuthusexhibit seasonal diphenism comprising spring‐morphs that develop from diapause pupae and summer‐morphs that develop from non‐diapause pupae. The development of seasonal morphs inA.burejanais regulated by the timing of secretion of ecdysteroids for adult development, whereas that inP.xuthusis regulated by the secretion of summer‐morph‐producing hormone, which is present in the brains and is under control of the photoperiod. We investigated whether a cerebral factor derived from brains plays a significant role in the regulation of seasonal morph development inA. burejanausing surgical operations. Pairs of chilled diapause pupae that had been chilled for more than 3 months at 4°C were joined surgically to each other and then developed into spring‐morph or spring‐like‐morph adults. Chilled diapause pupae that were joined with 1‐day‐old non‐diapause pupae developed into summer‐morph or summer‐like‐morph adults. When the brains of non‐diapause pupae were removed surgically 6–8 hr after pupation with and without injection of 20‐hydroxyecdysone, a large portion of them developed into spring‐morph or spring‐like‐morph adults, respectively. Furthermore, 90% of non‐diapause pupae developed into spring‐morph or spring‐like‐morph adults when the neck was ligated within 5 min after pupation. These results indicated that a cerebral factor showing summer‐morph‐producing hormone activity, which is secreted from the brain in the early pupal stage, in addition to 20‐hydroxyecdysone for adult development, play a significant role in the determination of summer‐morph development in non‐diapause pupae ofA. burejana.J. Exp. Zool. 321A:276–282, 2014. © 2014 Wiley Periodicals, Inc.