成虫 Anax imperator(昆虫纲:鸟纲)跗骨和下颌角质层在萌发过程中的鞣制过程

IF 3.6 3区 生物学 Q1 BIOLOGY Interface Focus Pub Date : 2024-04-12 DOI:10.1098/rsfs.2023.0076
Anika Preuss, Esther Appel, Stanislav N. Gorb, Sebastian Büsse
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引用次数: 0

摘要

节肢动物的角质层具有坚固、保护和轻便的特点。由于其可扩张性有限,节肢动物必须定期蜕皮才能生长。虽然蜕皮有利于寄生虫或毒素控制、生长和适应环境条件,但蜕皮需要消耗能量,而且蜕皮后的软体动物身体容易受伤和直接干燥。为了研究蜕皮过程中和蜕皮后硬化和色素沉着的时间变化,我们结合使用了显微照相、激光共聚焦扫描显微镜、扫描电子显微镜和组织学切片。我们分析了蓝帝蜻蜓的跗关节和下颌角质层,比较了在蜕皮过程中具有功能性的结构(跗关节/跗关节爪)和在蜕皮之后才具有功能性的结构(下颌)的鞣制进程。我们的研究结果表明(i)跗骨和下颌骨角质层的鞣化程度在萌发过程中不断增加;(ii)跗骨角质层的鞣化速度快于下颌骨角质层;(iii)下颌骨口侧的鞣化速度快于口侧;(iv)外侧和内侧角质层均被鞣化。跗骨和下颌角质层成分的变化反映了这些身体部位在出壳和首次行走或狩猎时抓牢基质时需要更高的机械稳定性。
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Tanning of the tarsal and mandibular cuticle in adult Anax imperator (Insecta: Odonata) during the emergence sequence

The arthropod cuticle offers strength, protection, and lightweight. Due to its limit in expandability, arthropods have to moult periodically to grow. While moulting is beneficial in terms of parasite or toxin control, growth and adaptation to environmental conditions, it costs energy and leaves the soft animal's body vulnerable to injuries and desiccation directly after ecdysis. To investigate the temporal change in sclerotization and pigmentation during and after ecdysis, we combined macrophotography, confocal laser scanning microscopy, scanning electron microscopy and histological sectioning. We analysed the tarsal and mandibular cuticle of the blue emperor dragonfly to compare the progress of tanning for structures that are functionally involved during emergence (tarsus/tarsal claws) with structures whose functionality is required much later (mandibles). Our results show that: (i) the tanning of the tarsal and mandibular cuticle increases during emergence; (ii) the tarsal cuticle tans faster than the mandibular cuticle; (iii) the mandibles tan faster on the aboral than on the oral side; and (iv) both the exo- and the endocuticle are tanned. The change in the cuticle composition of the tarsal and mandibular cuticle reflects the demand for higher mechanical stability of these body parts when holding on to the substrate during emergence and during first walking or hunting attempts.

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来源期刊
Interface Focus
Interface Focus BIOLOGY-
CiteScore
9.20
自引率
0.00%
发文量
44
审稿时长
6-12 weeks
期刊介绍: Each Interface Focus themed issue is devoted to a particular subject at the interface of the physical and life sciences. Formed of high-quality articles, they aim to facilitate cross-disciplinary research across this traditional divide by acting as a forum accessible to all. Topics may be newly emerging areas of research or dynamic aspects of more established fields. Organisers of each Interface Focus are strongly encouraged to contextualise the journal within their chosen subject.
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