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OBSERVATIONS ON THE CENTRIOLES OF THE SEA URCHIN SPERMATOZOON
Author(s) -
MARSHALL ROBERT D.,
LUYKX PETER
Publication year - 1973
Publication title -
development, growth and differentiation
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.864
H-Index - 66
eISSN - 1440-169X
pISSN - 0012-1592
DOI - 10.1111/j.1440-169x.1973.00311.x
Subject(s) - centriole , spermatozoon , flagellum , basal body , axoneme , anatomy , sea urchin , biology , tubule , microbiology and biotechnology , nucleus , spermatid , cilium , ultrastructure , sperm , paleontology , botany , genetics , bacteria , kidney
The spermatozoon of Lytechinus variegatus has two parallel centrioles. The basal body of the flagellum consists of the proximal centriole (a short cylinder of nine tubule‐triplets) and its distal extension of nine tubule‐doublets. The distal centriole lies near the distal end of the basal body, between the nucleus and the mitochondrion. The observations suggest that both the proximal and the distal centrioles are polarized structures, their tubule‐triplets pitched in the same direction and their distal ends associated with the flagellar axoneme and with the mitochondrion, respectively. The distal centriole in different spermatozoa occupies different positions around the basal body‐flagellum complex.