CYTOLOGICAL CHANGES IN THE FAT-BODY OF THE AMERICAN COCKROACH, PERIPLANETA-AMERICANA, (DICTYOPTERA, BLATTIDAE) IN RELATION TO DIETARY NITROGEN LEVELS
CYTOLOGICAL CHANGES IN THE FAT-BODY OF THE AMERICAN COCKROACH, PERIPLANETA-AMERICANA, (DICTYOPTERA, BLATTIDAE) IN RELATION TO DIETARY NITROGEN LEVELS
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DOI：
10.1093/aesa/72.2.197
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发表时间：
1979-01-01
影响因子：
2.3
通讯作者：
MULLINS, KJ
中科院分区：
文献类型：
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作者：
COCHRAN, DG;MULLINS, DE;MULLINS, KJ
光镜和电子显微镜观察证实脂肪体中有3种细胞类型。人们的注意力集中在与饲料氮有关的尿酸盐细胞上。这些细胞通常与真菌细胞联系在一起，当饲料氮较低时，基本上没有尿酸盐小球(固结)，当变弱时，有深色的包裹体。随着膳食氮的增加，尿酸盐细胞逐渐增加尿酸盐小球的负荷。如果饮食中的氮含量很高，或者饮食中含有纤维素，那么体内的脂肪就会因尿酸盐储存而超负荷，这往往会使细胞结构变得模糊。对尿酸盐球的详细检查显示，它们有深色染色中心，并始终与一个离散的细胞质实体联系在一起，而细胞质实体又被一个膜限制的液泡所包围。包括尿酸盐球体在内的整个结构称为尿酸盐结构单位。它的存在暗示了一系列与尿酸盐沉积和/或动员有关的复杂事件。
Light and transmission electron microscopic studies confirmed 3 cell types in fat body. Attention was focused on the urate cells in relation to dietary N. These cells are usually associated with mycetocytes, are essentially devoid of urate spherules (concretions) when dietary nitrogen is low, and have darkly-staining inclusions when attenuated. As dietary nitrogen increases the urate cells become progressively more loaded with urate spherules. At very high levels of dietary N or on a diet consisting of cellulose, the fat body may become overloaded by urate stores which tend to obscure cellular structure. Detailed examination of the urate spherules revealed that they have darkly-staining centers and are consistently associated with a discrete cytoplasmic entity which, in turn, is surrounded by a membrane-limited vacuole. This entire structure, including the urate spherule, is termed the urate structural unit. Its existence suggests a series of complex events associated with urate deposition and/or mobilization.