The humoral and cellular defenses are crtitical in insects’ immunity. In the present study we focused on individual haemocyt types of mulberry pyralid, Glyphodes pyloalis Walker (Lep.; Pyralidae ) and examined them for the first time by light, differential interference contrast, scanning and transmission electron microscopy. Like many lepidopterous insects five types of haemocytes were identified; prohaemocytes, plasmatocytes, granulocytes, oenocytoids and spherulocytes. The small, rounded to ovoid cells with homogenous cytoplasm and large nuclei compared to cytoplasm were designated as prohaemocyts. The plasmatocytes were polymorphic and variable in sizes. The oval to spherical cells, with plenty of rough endoplasmic reticula, mitochondria, and microtubules in the cytoplasm were designated as the granulocytes. The oenocytoids were round or spherical with elongated eccentric nucleus and cytoplasm with small mitochondria and few rough endoplasmic reticula. Total haemocyte counts in different larval instars showed that THC increases as the larval age increase. Differential counts of haemocytes revealed the plasmatocytes and granulocytes as the most abundant haemocyte types in comparison with other types.

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桑葚血细胞，结构和功能研究

体液和细胞防御对昆虫的免疫至关重要。在本研究中，我们专注于桑葚的单个血细胞类型，Glyphodes pyloalis Walker (Lep.; Pyralidae) 并首次通过光、微分干涉对比、扫描和透射电子显微镜检查它们。像许多鳞翅目昆虫一样，鉴定了五种类型的血细胞；原血细胞、浆细胞、粒细胞、类胞细胞和球状细胞。与细胞质相比，具有同质细胞质和大细胞核的小、圆形至卵形细胞被指定为原血细胞。浆细胞是多态的，大小不一。卵圆形至球形的细胞，细胞质中含有大量粗面内质网、线粒体和微管，称为粒细胞。卵形胞体呈圆形或球形，细胞核偏心细长，胞质细长，线粒体小，粗面内质网少。不同幼虫龄期的总血细胞计数表明，THC随着幼虫年龄的增加而增加。血细胞的差异计数显示，与其他类型相比，浆母细胞和粒细胞是最丰富的血细胞类型。