Spermatogenesis in the bipolar centric diatom Plagiogrammopsis vanheurckii (Mediophyceae)

We examined gametogenesis and mating behaviour of the cymatosiroid diatom Plagiogrammopsis vanheurckii. A unique type of merogenous spermatogenesis was observed in this species, whereby each spermatid matured into a colourless sperm by detaching a residual body. Spermatogonia developed either direct...

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Bibliographic Details
Published inPhycologia (Oxford) Vol. 57; no. 3; pp. 354 - 359
Main Authors Samanta, Brajogopal, Heffell, Quentin, Ehrman, James M., Kaczmarska, Irena
Format Journal Article
LanguageEnglish
Published Abingdon Taylor & Francis 01.05.2018
Taylor & Francis Ltd
Subjects
Bacillariophyta
Cloning
Cymatosiraceae
Diatoms
Gametogenesis
Mating behavior
Mating system
Merogenous
Mitosis
Plankton
Plant reproduction
Polar centric diatoms
Reproductive behaviour
Sexual induction
Sperm
Spermatogenesis
Spermatogonia
Spermatozoa
Studies
Vegetative cells
Canada
Bay of Fundy
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Summary:We examined gametogenesis and mating behaviour of the cymatosiroid diatom Plagiogrammopsis vanheurckii. A unique type of merogenous spermatogenesis was observed in this species, whereby each spermatid matured into a colourless sperm by detaching a residual body. Spermatogonia developed either directly or by depauperating mitosis from vegetative cells. The mating behaviour observed in this species was more complex than generally reported in homothallic and self-compatible centric diatoms and suggests the existence of mechanisms facilitating out-crossing.
ISSN:0031-8884
2330-2968
DOI:10.2216/17-107.1