Suitability of Phytosterols Alongside Fatty Acids as Chemotaxonomic Biomarkers for Phytoplankton
Taipale, S. J., Hiltunen, M., Vuorio, K., & Peltomaa, E. (2016). Suitability of Phytosterols Alongside Fatty Acids as Chemotaxonomic Biomarkers for Phytoplankton. Frontiers in Plant Science, 7, Article 212. https://doi.org/10.3389/fpls.2016.00212
Julkaistu sarjassa
Frontiers in Plant SciencePäivämäärä
2016Tekijänoikeudet
© 2016 Taipale, Hiltunen, Vuorio and Peltomaa. This is an open-access article distributed under the terms of the Creative Commons Attribution License (CC BY).
The composition and abundance of phytoplankton is an important factor defining
ecological status of marine and freshwater ecosystems. Chemotaxonomic markers
(e.g., pigments and fatty acids) are needed for monitoring changes in a phytoplankton
community and to know the nutritional quality of seston for herbivorous zooplankton.
Here we investigated the suitability of sterols along with fatty acids as chemotaxonomic
markers using multivariate statistics, by analyzing the sterol and fatty acid composition
of 10 different phytoplankton classes including altogether 37 strains isolated from
freshwater lakes. We were able to detect a total of 47 fatty acids and 29
sterols in our phytoplankton samples, which both differed statistically significantly
between phytoplankton classes. Due to the high variation of fatty acid composition
among Cyanophyceae, taxonomical differentiation increased when Cyanophyceae were
excluded from statistical analysis. Sterol composition was more heterogeneous within
class than fatty acids and did not improve separation of phytoplankton classes when
used alongside fatty acids. However, we conclude that sterols can provide additional
information on the abundance of specific genera within a class which can be generated
by using fatty acids. For example, whereas high C16 ω-3 PUFA (polyunsaturated fatty
acid) indicates the presence of Chlorophyceae, a simultaneous high amount of ergosterol
could specify the presence of Chlamydomonas spp. (Chlorophyceae). Additionally,
we found specific 4α-methyl sterols for distinct Dinophyceae genera, suggesting that
4α-methyl sterols can potentially separate freshwater dinoflagellates from each other.
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Julkaisija
Frontiers Research FoundationISSN Hae Julkaisufoorumista
1664-462XJulkaisu tutkimustietojärjestelmässä
https://converis.jyu.fi/converis/portal/detail/Publication/25610567
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