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Slanted centriole and transient anchoring apparatus during spermiogenesis of an Oligochaete (Annelida)
Author(s) -
Ferraguti M.
Publication year - 1985
Publication title -
biology of the cell
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.543
H-Index - 85
eISSN - 1768-322X
pISSN - 0248-4900
DOI - 10.1111/j.1768-322x.1985.tb00334.x
Subject(s) - spermiogenesis , centriole , biology , spermatozoon , axoneme , oligochaeta (plant) , anatomy , microbiology and biotechnology , organelle , ultrastructure , flagellum , zoology , genetics , gene
An electron microscopic analysis of Tubifex tubifex (Annelida, Oligochaeta) spermiogenesis has revealed the presence of a slanted basal body during the early stages: the centriole has the shape of a cylinder obliquely cut at one extremity. In these stages an anchoring apparatus is also present, similar to the one of primitive spermatozoa, and disappearing in the mature sperm. The slanted centriole in cross section gives images of “incomplete” centrioles similar to the ones reported in the literature and interpreted as images of centriologenesis. The transient anchoring apparatus is interpreted as a rudimentary organelle used during spermiogenesis to maintain the centriole in a correct position. This function in the mature spermatozoon is performed by the mitochondria.