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

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

*Bijbehorende auteur voor dit werk

    OnderzoeksoutputAcademicpeer review

    42 Citaten (Scopus)


    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.

    Originele taal-2English
    Pagina's (van-tot)354-358
    Aantal pagina's5
    TijdschriftJournal of Phycology
    Nummer van het tijdschrift2
    StatusPublished - apr.-2005

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