Metathoracic Glands ofScaptocoris castaneaPerty, 1833 (Heteroptera: Cydnidae): Morphology and Volatilomic
Source abstract
Abstract
Abstract The characteristic odor of Heteroptera is produced by metathoracic glands, which is poorly evaluated in the brown stink bug Scaptocoris castanea Perty, 1833 (Heteroptera: Cydnidae), an important agricultural pest. This study describes the anatomy, histology, and ultrastructure of the external scent efferent system, associated metathoracic gland, and volatile compounds produced. The external scent efferent system of S. castanea is ventrally located in the thorax, with an ovoid ostiole, a small and protruded peritreme, and an evaporatory area (evaporatorium) rich in mycoid microsculptures. The metathoracic glands have a secretory region with irregular tubules that open into a large reservoir. The secretory epithelium of the metathoracic gland has bicellular secretory units with globular and canaliculus cells. The globular cells are rich in rough endoplasmic reticulum, mitochondria, and secretory vesicles. The reservoir has a single layered cubic epithelium with apical surface lined by a thin cuticular intima, and cytoplasm rich in mitochondria, lysosomes, and secretory vesicles. The secretion of the metathoracic glands of S. castanea has 11 components, including aldehydes, alcohols, and hydrocarbons, with abundant (E)-2-decenal, 2-octenal, 2-hexenal, and 1-octen-3-yl acetate. This study fills an important gap in understanding defensive strategy in this agricultural pest.
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Research context
OpenAlex topics: Hemiptera Insect Studies · Insect-Plant Interactions and Control · Entomopathogenic Microorganisms in Pest Control
SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.
Affiliations
Departamento de Biologia Geral, Universidade Federal de Viçosa , Viçosa, Minas Gerais 36570-000 , Brazil
Curso de Agronomia, Universidade do Estado de Mato Grosso , Tangará da Serra, Mato Grosso 78300-000 , Brazil
Fundação de Apoio a Pesquisa Agropecuária de Mato Grosso , Rondonópolis, Mato Grosso 78750-360 , Brazil
Departamento de Química, Universidade Federal de Viçosa , Viçosa, Minas Gerais 36570-000 , Brazil
Institute of Plant Protection, MNS University of Agriculture Multan , Multan 60000 , Pakistan
Departamento de Entomologia, Universidade Federal de Viçosa , Viçosa, Minas Gerais 36570-000 , Brazil
Programa de Pós-graduação em Ambientes e Sistema de Produção Agrícola – PPGASP, Universidade do Estado de Mato Grosso , Tangará da Serra, Mato Grosso 78300-000 , Brazil
Funding
Conselho Nacional de Desenvolvimento Científico e Tecnológico · Fundação de Amparo à Pesquisa do Estado de Minas Gerais · Coordenação de Aperfeiçoamento de Pessoal de Nível Superior
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