Monitoring rapid valve formation in the pennate diatom Navicula salinarum (Bacillariophyceae)

S Hazelaar*, HJ van der Strate, WWC Gieskes, EG Vrieling

*Corresponding author for this work

    Research output: Contribution to journalArticleAcademicpeer-review

    43 Citations (Scopus)

    Abstract

    After each division of a diatom cell, a new siliceous hypovalve is formed inside the silica deposition vesicle (SDV). We present the sequence of this early formation of the new valve in the pennate marine diatom Navicula salinarum (Grunow) Hustedt, visualized by using the fluorescent probe 2-(4-pyridyl)-5-((4-(2-dimethylaminoethylamino-carbamoyl)methoxy)phenyl)oxazole (PDMPO). Our observations confirm that two-dimensional expansion of the growing valve is a rapid process of no more than 15 min; three-dimensional completion of the valve appears to be slower, lasting most of the time valve formation takes. The results are relevant to studies of the timing of molecular processes involved in valve formation (i.e. the bio- and morphogenesis of the SDV) in relation to uptake and transport of silicic acid. Use of this probe helps us to identify specific developmental stages for further detail analysis of diatom basilica formation, which eventually could lead to obtaining enriched SDV fractions.

    Original languageEnglish
    Pages (from-to)354-358
    Number of pages5
    JournalJournal of Phycology
    Volume41
    Issue number2
    DOIs
    Publication statusPublished - Apr-2005

    Keywords

    • diatoms
    • fluorescence
    • Navicula salinarum
    • PDMPO
    • silica deposition vesicle
    • SDV
    • valve formation
    • SILICA-SHELL FORMATION
    • CYLINDROTHECA-FUSIFORMIS
    • FINE-STRUCTURE
    • CELL-CYCLE
    • PELLICULOSA
    • BIOMINERALIZATION
    • BIOCHEMISTRY
    • DEPOSITION
    • EXPRESSION
    • TRANSPORT

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