Dual "Bacterial-Fungal" Symbiosis in Deltocephalinae Leafhoppers (Insecta, Hemiptera, Cicadomorpha: Cicadellidae).
Dual "Bacterial-Fungal" Symbiosis in Deltocephalinae Leafhoppers (Insecta, Hemiptera, Cicadomorpha: Cicadellidae).
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DOI：
10.1007/s00248-017-1075-y
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发表时间：
2018-04
影响因子：
3.6
通讯作者：
Szklarzewicz T
中科院分区：
文献类型：
--
作者：
Kobiałka M;Michalik A;Walczak M;Szklarzewicz T
本文采用组织学、超微结构和分子技术研究了四种三角叶蝉的共生系统（共生类型、在寄主虫体中的分布和代际间的跨卵巢传播）。在所有四个物种中，存在两种类型的共生体：细菌Sulcia（拟杆菌门）和与昆虫病原真菌（子囊菌门，sordariomycates纲）密切相关的酵母样共生体。细菌总是隐藏在巨大的细菌细胞中，这些细菌细胞被分成称为“细菌组”的大器官。在F. septentrionalis、G. ventralis和O. ishidae中，许多酵母样微生物定位于脂肪体细胞中，而在C. quadrinotata中，它们大量占据中肠上皮细胞。此外，在C. quadrinotata中，少量酵母样微生物出现在脂肪体细胞内和细胞外的血淋巴中。七毛螺旋体、腹腹螺旋体、石竹螺旋体和四棱螺旋体中的Sulcia细菌，以及存在于七毛螺旋体、腹腹螺旋体和石竹螺旋体脂肪体中的酵母菌样共生体均经卵巢传播；也就是说，它们感染构成卵巢的卵巢。
The symbiotic systems (types of symbionts, their distribution in the host insect body, and their transovarial transmission between generations) of four Deltocephalinae leafhoppers: Fieberiella septentrionalis, Graphocraerus ventralis, Orientus ishidae, and Cicadula quadrinotata have been examined by means of histological, ultrastructural, and molecular techniques. In all four species, two types of symbionts are present: bacterium Sulcia (phylum Bacteroidetes) and yeast-like symbionts closely related to the entomopathogenic fungi (phylum Ascomycota, class Sordariomycetes). Sulcia bacteria are always harbored in giant bacteriocytes, which are grouped into large organs termed “bacteriomes.” In F. septentrionalis, G. ventralis, and O. ishidae, numerous yeast-like microorganisms are localized in cells of the fat body, whereas in C. quadrinotata, they occupy the cells of midgut epithelium in large number. Additionally, in C. quadrinotata, a small amount of yeast-like microorganisms occurs intracellularly in the fat body cells and, extracellularly, in the hemolymph. Sulcia bacteria in F. septentrionalis, G. ventralis, O. ishidae, and C. quadrinotata, and the yeast-like symbionts residing in the fat body of F. septentrionalis, G. ventralis, and O. ishidae are transovarially transmitted; i.e., they infect the ovarioles which constitute the ovaries.
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