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小地老虎蜕皮腺的形态和结构 被引量:1

MORPHOLOGY AND STRUCTURE OF MOULTING GLANDS IN THE BLACK CUTWORM AGROTIS YPSILON
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摘要 用电镜和光镜以及组织化学方法研究了小地老虎(Agrotis ypsilon)幼虫蜕皮腺的形态与结构,及其在5龄—6龄幼虫的蜕皮期和预蛹—蛹的变态期的变化,并对蜕皮腺分泌的蜕皮液进行了组织化学分析。结果表明:(1)幼虫期的蜕皮腺共有15对,其中12对位于胸部1—3节和腹部1—9节的背侧面,其余3对位于前、中、后胸基节窝的外侧,至化蛹30小时后逐渐解体;(2)蜕皮腺的分泌细胞均为“液泡型”,在幼虫每次蜕皮期间出现周期性变化,随着蜕皮过程的结束,细胞由分泌状态进入静止状态,体积逐渐变小,色泽由乳白色趋向透明,液泡变小或消失,内质网数量溅少,液泡内含物对PAS反应减弱;(3)蜕皮前蜕皮腺分泌细胞的内含物PAS强阳性,表明蜕皮液是粘多糖或糖蛋白性质的,它通过导管分泌到新旧表皮层之间。 The morphology and structure of moulting glands in the black cutworm Agrotis ypsilon were studied with light and electron microscopes. Attention has been paid on their histologi-cal and cytological changes in larvae from fifth to sixth instar, prepupae to pupae, and pupae to eclosion. The results are summarized as follows:1.There are 15 pairs of moulting glands in the larva, of which 12 pairs are located in the dorso-pleural regions from prothorax to nineth abdominal segment, and 3 pairs are located latero-ventrally just next to the coxal cavities of the three thoracic segments. These glands all begin to degenerate at 30 hours after pupation.2.The secretory cells of the moulting glands all belong to the vesicular type. They undergo periodic changes during moult as follows: decrease of cell size→loss of the opalescent color→ emptiness of the vesicles→marked decrease of rough endoplasmic reticula→weakening of PAS reaction of cell contents.3.It was also observed that the gland's contents were secreted into the space between the old and new cuticular layers and showed sugar-protein property. It is possible that the secretion has a lubriant action for ecdysis.
出处 《昆虫学报》 CAS CSCD 北大核心 1992年第2期142-147,共6页 Acta Entomologica Sinica
基金 国家自然科学基金
关键词 蜕皮腺 小地老虎 Agrotis ypsilon-moulting gland
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  • 1芮菊生,组织化学染色法,1980年

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