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(Reference retrieved automatically from Web of Science through information on FAPESP grant and its corresponding number as mentioned in the publication by the authors.)

Salivary glands in workers of Ruptitermes spp. (Blattaria, Isoptera, Termitidae, Apicotermitinae): a morphological and preoteomic approach

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Costa-Leonardo, Ana Maria [1, 2] ; da Silva, Iago Bueno [1] ; Janei, Vanelize [1] ; Poiani, Silvana Beani [2] ; dos Santos-Pinto, Jose Roberto Aparecido [2] ; Esteves, Franciele Grego [2] ; Palma, Mario Sergio [2]
Total Authors: 7
[1] Univ Estadual Paulista, Inst Biociencias, Dept Biol Geral & Aplicada, Lab Cupins, UNESP, Campus Rio Claro, Ave 24A, 1515, BR-13506900 Rio Claro, SP - Brazil
[2] Univ Estadual Paulista, Inst Biociencias, Ctr Estudos Insetos Sociais CEIS, UNESP, Campus Rio Claro, Ave 24A, 1515, BR-13506900 Rio Claro, SP - Brazil
Total Affiliations: 2
Document type: Journal article
Source: Cell and Tissue Research; v. 385, n. 3, p. 603-621, SEP 2021.
Web of Science Citations: 1

Salivary glands are omnipresent in termites and occur in all developmental stages and castes. They function to produce, store, and secrete compounds, ranging from a feeding function to defensive mechanisms. Here, we provide a complete morphological overview of the salivary glands in the soldierless species Ruptitermes reconditus and R. xanthochiton, and the first proteomic profile of the salivary glands in a Neotropical Apicotermitinae representative, R. reconditus. Salivary glands from both species were composed of several acini, roughly spherical structures composed of two types of central cells (type I and II) and peripheral parietal cells, as well as transporting ducts and two salivary reservoirs. Central cells were richly supplied with electron-lucent secretory vesicles and rough endoplasmic reticulum, a feature of protein-secreting cells. Parietal cells of Ruptitermes spp. had conspicuous characteristics such as electron-lucent secretory vesicles surrounded by mitochondria and well-developed microvilli. Moreover, different individuals showed variation in the secretory cycle of salivary acini, which may be related to polyethism. Ultrastructural analysis evidenced a high synthesis of secretion and also the occurrence of lysosomes and autophagic structures in central cells. Proteomic analysis of the salivary glands revealed 483 proteins divided into functional groups, highlighting toxins/defensins and compounds related to alarm communication and colony asepsis. Soldierless termites are quite successful, especially due to morphological adaptations of the workers, including unknown modifications of exocrine glands. Thus, according to our morphological and proteomic findings, we discuss the potential roles of the salivary gland secretion in different social aspects of the sampled species. (AU)

FAPESP's process: 17/10373-0 - Profiling the peptidomic and structural-functional characterization of lipid vesicles present in the Nephila clavipes web spider
Grantee:Franciele Grego Esteves
Support type: Scholarships in Brazil - Doctorate
FAPESP's process: 16/16212-5 - Natural proteopeptides from the Brazilian fauna, flora and microbiota as potential models for the rational development of new drugs of therapeutic use: isolation, structure elucidation, chemical synthesis and functional activity assays
Grantee:Mario Sergio Palma
Support type: BIOTA-FAPESP Program - Thematic Grants