Effects of pre-overwintering conditions on eupyrene and apyrene spermatogenesis after overwintering in Polygonia c-aureum (Lepidoptera:Nymphalidae)
Effects of pre-overwintering conditions on eupyrene and apyrene spermatogenesis after overwintering in Polygonia c-aureum (Lepidoptera:Nymphalidae)
复制标题
越冬前条件对金蓼（鳞翅目：蛱蝶科）越冬后丁芘和蝌蚪精子发生的影响
DOI：
10.1016/j.jinsphys.2017.04.008
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发表时间：
2017
影响因子：
2.2
通讯作者：
Jun Mitsuhashi
中科院分区：
文献类型：
--
作者：
Satoshi Hiroyoshia;Jin Yoshimura;Kikuo Iwabuchi,Gadi V.P. Reddy;Jun Mitsuhashi
精子多态性在无脊椎动物中是众所周知的。在昆虫中，鳞翅目有两种精子：有核的正核精子（可育精子）和无核的正核精子（不可育精子）。这些精子类型是在胚胎发生后产生的，真丝精子发生在真丝精子发生之前。在越冬期间，精子发生停止，一部分未分化阶段的精母细胞退化。越冬后，未受影响的精原细胞重新开始精子发生。然而，鳞翅目昆虫在越冬后如何在成年睾丸中产生新的精子尚不清楚。在本研究中，我们研究了雌雄蛱蝶在不同环境条件下越冬后的精子发生事件。我们的研究结果表明，正炔和无炔精子发生在任何停止阶段重新开始，这两种类型的精子在成虫越冬后没有特定的顺序再生。这表明越冬后发生的精子发生过程没有与发育顺序相关的胚胎发生限制。
Sperm polymorphism is widely known in invertebrates. In insects, Lepidoptera has two types of sperm: nucleated eupyrene (fertile) sperm and anucleated apyrene (unfertile) sperm. These sperm types are produced during post-embryogenesis, and eupyrene spermatogenesis precedes apyrene spermatogenesis. During overwintering, spermatogenesis stops and a portion of undifferentiated-stage spermatocytes degenerate. After overwintering, spermatogenesis restarts with unaffected spermatogonia. However, how new spermatozoa arise in the adult testes after overwintering is not known in Lepidoptera. In this study, we investigated the spermatogenesis events in the nymphalid butterflyPolygonia c-aureumafter overwintering under various environmental conditions. Our results indicate that both eupyrene and apyrene spermatogenesis restart at any stopping stage and sperm of these types are regenerated in no particular order after adult insect overwintering. This suggests that the spermatogenesis occurring after overwintering proceeds without embryogenetic restrictions related to the developmental sequence.