THE POLYMORPHIC DIATOMPHAEODACTYLUM TRICORNUTUM: ULTRASTRUCTURE OF ITS MORPHOTYPES1,2
作者:
Michael A. Borowitzka,
Benjamin E. Volcani,
期刊:
Journal of Phycology
(WILEY Available online 1978)
卷期:
Volume 14,
issue 1
页码: 10-21
ISSN:0022-3646
年代: 1978
DOI:10.1111/j.1529-8817.1978.tb00625.x
出版商: Blackwell Publishing Inc
关键词: cell morphology;cell wall;diatom;frustule;Phaeodactylum;silica deposition;wall formation
数据来源: WILEY
摘要:
ABSTRACTThe ultrastructure of the oval, fusiform and triradiate morphotypes ofPhaeodactylum tricornutum Bohlin is described. The organization and structure of the cytoplasmic organelles is similar in all three morphotypes, except that the vacuoles occupy the extra volume created by the arms of the fusiform and triradiate cells. The frustule in fusiform and triradiate cells is organic; in the oval type it may be organic or one of the valves may have a silica frustule surrounded by an organic wall. In all cells, the organic cell wall has up to 10 silica bands (13 nm wide) embedded in its surface in the girdle region, lacks girdle bands, and has an outer corrugated cell wall layer, except in the girdle region. Cell division, organic wall formation and silica deposition are described in detail. Four types of oval cells are also described. The relation to other diatoms is discussed.
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