Morphology and ultrastructure of the mandibular gland in Camponotus japonicus

IF 1.7 3区 农林科学 Q2 ENTOMOLOGY Arthropod Structure & Development Pub Date : 2023-10-21 DOI:10.1016/j.asd.2023.101313
Wenjing Xu , Liangliang Zhang , Ruoqing Ma , Johan Billen , Hong He
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Abstract

The mandibular gland is an important exocrine gland connected to the mandibles. In ants, it plays a crucial role in alarm communication and reproduction. While the overall morphology of the mandibular gland does not vary much between ant species, significant differences exist in the ultrastructural characteristics and gland size in some reported cases. However, there have been few systematic comparative studies on this subject. In this paper, we conducted microscopic observations to analyze the morphological and ultrastructural similarities and differences of the mandibular gland in different castes of Camponotus japonicus. Our findings revealed that the mandibular glands of males were significantly larger than those of females. In terms of relative size, within the female castes the mandibular glands of minor workers were the largest. Additionally, our observations of the ultrastructure showed that secretory substances were most abundant in queens. All female castes and males showed the presence of crystalline structures in the secretory cells. The content of these biocrystals decreased from minor workers to major workers, queens, and males. In males, however, crystalline structures were rare and the most abundant substances are droplet-like secretions. The differences in morphology and ultrastructure between different castes suggest that the function of the mandibular gland varies among castes. In conclusion, our study provides insights into the morphological and ultrastructural characteristics of the mandibular gland in different castes of C. japonicus. Further research is needed to fully understand the specific functions and mechanisms of this gland in ants.

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刺参下颌腺的形态和超微结构。
下颌腺是连接下颌的重要外分泌腺。在蚂蚁身上,它在警报通信和繁殖中起着至关重要的作用。虽然下颌腺的总体形态在不同蚂蚁物种之间没有太大差异,但在一些报道的病例中,下颌腺的超微结构特征和大小存在显著差异。然而,对这一主题的系统比较研究却很少。本文通过显微观察,分析了不同种姓刺参下颌腺的形态和超微结构的异同。我们的研究结果显示,男性的下颌腺明显大于女性。就相对大小而言,在女性种姓中,未成年工人的下颌腺最大。此外,我们对超微结构的观察表明,皇后体内分泌物质最丰富。所有雌性种姓和雄性种姓的分泌细胞都显示出结晶结构。这些生物晶体的含量从次要工人下降到主要工人、王后和雄性。然而,在雄性中,晶体结构很少,最丰富的物质是液滴状分泌物。不同种姓之间的形态和超微结构差异表明,不同种姓的下颌腺功能不同。总之,我们的研究深入了解了不同种姓刺参下颌腺的形态和超微结构特征。需要进一步的研究来充分了解该腺在蚂蚁中的具体功能和机制。
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来源期刊
CiteScore
3.50
自引率
10.00%
发文量
54
审稿时长
60 days
期刊介绍: Arthropod Structure & Development is a Journal of Arthropod Structural Biology, Development, and Functional Morphology; it considers manuscripts that deal with micro- and neuroanatomy, development, biomechanics, organogenesis in particular under comparative and evolutionary aspects but not merely taxonomic papers. The aim of the journal is to publish papers in the areas of functional and comparative anatomy and development, with an emphasis on the role of cellular organization in organ function. The journal will also publish papers on organogenisis, embryonic and postembryonic development, and organ or tissue regeneration and repair. Manuscripts dealing with comparative and evolutionary aspects of microanatomy and development are encouraged.
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