Fottea 9(2): 307-316, 2009 | DOI: 10.5507/fot.2009.030

Morphometric study of Navicula morphospecies (Bacillariophyta) with respect to diatom life cycle.

Jana Veselá1*, Jiří Neustupa1, Martina Pichrtová1, Aloisie Poulíčková2
1 Department of Botany, Faculty of Science, Charles University, Benátská 2, CZ-128 01 Prague 2, Czech Republic
2 Department of Botany, Faculty of Science, Palacký University, Svobody 26, CZ-771 46 Olomouc, Czech Republic

Quantitative and qualitative variation in valve morphology in strains of Navicula cryptocephala and N. trivialis were examined using conventional valve measurements (length, width, striae density) and landmark-based geometric morphometric method. The ability of morphometric techniques to distinguish individual strains on the basis of postinitial and/or sexually competent cells was assessed by multivariate analyses and permutation tests. The data showed that each strain had unique valve characters, which were shared by both large postinitial and small sexually competent cells. Landmarks representing central area and apical ends of the valves were primarily the most useful for discrimination between strains. The geometric morphometric techniques appeared to be enough sensitive to distinguish subtle morphological differences between Navicula morphospecies clonal cultures withouth any interference of diatom life cycle stage.

Keywords: canonical variate analysis, geometric morphometry, life cycle, Navicula cryptocephala, Navicula trivialis, sliding landmarks

Received: April 20, 2009; Accepted: May 21, 2009; Published: September 1, 2009  Show citation

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Veselá, J., Neustupa, J., Pichrtová, M., & Poulíčková, A. (2009). Morphometric study of Navicula morphospecies (Bacillariophyta) with respect to diatom life cycle. Fottea, 9(2), 307-316. doi: 10.5507/fot.2009.030
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