ON THE CYTOLOGY AND LIFE-CYCLE OF COUGOURDELLA-POLYCENTROPI WEISER, 1965, WITH COMMENTS ON THE TAXONOMY OF THE GENUS COUGOURDELLA HESSE, 1935 (MICROSPORA, COUGOURDELLIDAE)

作     者：LARSSON, JIR 

作者机构：Department of Zoology University of Lund Sweden. 

出 版 物：《EUROPEAN JOURNAL OF PROTISTOLOGY》 (欧洲原生生物学杂志)

年 卷 期：1989年第25卷第1期

页      面：33-44页

核心收录：

学科分类：0710[理学-生物学] 07[理学] 09[农学] 

主　　题：Cougourdella polycentropi Pyrotheca Ultrastructure Development Taxonomy A anchoring disc AS attachment section D double-layer E envelope of the sporophorous vesicle EN endospore ER endoplasmic reticulum EX exospore F polar filament M1 merozoite of the first generation N nucleus NL nucleolus P plasma membrane PO polar sac PP polaroplast PS posterosome R ribosome S sporont wall T tubulus V vacuole 

摘      要：The cytology and life cycle of a microsporidium identified as Cougourdella polycentropi, with provenance from southern Sweden, is described using light and electron microscopy methods. The life cycle is comprised of two merogonial cycles followed by tetrasporoblastic sporogony in sporophorous vesicles. The lageniform, 7.0-7.7 .mu.m long spores have an anisofilar polar filament arranged in 6-7 coils, a layered exospore and chambered/lamellar polaroplast of unusual construction. The sporophorous vesicles have fibrillar, and temporarily, tubular inclusions. The vesicles were fragile and the tetrasporoblastic condition was not prominent in squash preparations. The microsporidium is compared to microsporidia with lageniform spores from caddis fly hosts, and the identification is discussed. The taxonomic problems with the genera Pyrotheca and Cougourdella are discussed.