Martínez Luis Carlos, Plata-Rueda Angelica, Zanuncio José Cola, Tavares Wagner de Souza, Serrão José Eduardo
Departamento de Biologia Geral, Universidade Federal de Viçosa, Avenida Peter Henry Rolfs, Campus Universitário Viçosa, Minas Gerais, 36570-000, Brazil.
Departamento de Entomologia, Universidade Federal de Viçosa, Viçosa, Minas Gerais, 36570-000, Brazil.
Protoplasma. 2017 Sep;254(5):1965-1972. doi: 10.1007/s00709-017-1087-y. Epub 2017 Feb 25.
The metathoracic scent system in Heteroptera produces and releases defensive volatile compounds. The odor produced by predatory stink bugs differs from phytophagous bugs, suggesting a variation between the structure and function of the metathoracic scent system. The anatomy and ultrastructure of the external thoracic efferent system, scent gland, and reservoir in the stink bug predators Brontocoris tabidus, Podisus nigrispinus, and Supputius cincticeps (Heteroptera: Pentatomidae: Asopinae) were studied. External thoracic efferent systems of B. tabidus, P. nigrispinus, and S. cincticeps have anatomical differences in ostiole, peritreme, and evaporatorium. Scent glands have a secretory portion and a reservoir. The reservoir has irregular projections, and in B. tabidus, it is enlarged and heart shaped, whereas in P. nigrispinus and S. cincticeps it is flattened and semicircular. The secretory tissue of the scent gland has well-developed globular secretory cells that produce odorous compounds, and the reservoir has a single layer of cubical cells lined by a cuticular intima. Secretory cells are type III with an intracellular end apparatus, well-developed nucleus with decondensed chromatin, and cytoplasm rich in mitochondria, lysosomes, granules, and smooth endoplasmic reticulum. These findings suggest that there are differences in physiological function of the odoriferous system and the volatile compounds produced by the secretory cells, which may indicate variation in defensive behavior of these species.
异翅目昆虫的后胸气味系统会产生并释放防御性挥发性化合物。捕食性椿象产生的气味与植食性椿象不同，这表明后胸气味系统的结构和功能存在差异。对捕食性椿象Brontocoris tabidus、Podisus nigrispinus和Supputius cincticeps（异翅目：蝽科：益蝽亚科）的胸部外部传出系统、气味腺和储液囊的解剖结构和超微结构进行了研究。Brontocoris tabidus、Podisus nigrispinus和Supputius cincticeps的胸部外部传出系统在气门、围气门片和蒸发域存在解剖学差异。气味腺有一个分泌部分和一个储液囊。储液囊有不规则的突起，在Brontocoris tabidus中，它扩大且呈心形，而在Podisus nigrispinus和Supputius cincticeps中，它扁平且呈半圆形。气味腺的分泌组织有发育良好的球状分泌细胞，这些细胞产生有气味的化合物，储液囊有一层由角质内膜衬里的立方体细胞。分泌细胞为III型，具有细胞内终末装置、发育良好且染色质解聚的细胞核，以及富含线粒体、溶酶体、颗粒和滑面内质网的细胞质。这些发现表明，气味系统的生理功能以及分泌细胞产生的挥发性化合物存在差异，这可能表明这些物种在防御行为上存在差异。
