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Revision of Coelastrella (Scenedesmaceae, Chlorophyta) and first register of this green coccoid microalga for continental Norway

Authors
  • Goecke, F.1
  • Noda, J.2
  • Paliocha, M.1
  • Gislerød, H. R.1
  • 1 Norwegian University of Life Sciences, Ås, 1432, Norway , Ås (Norway)
  • 2 The Czech Academy of Sciences (CAS), Třeboň, Czech Republic , Třeboň (Czechia)
Type
Published Article
Journal
World Journal of Microbiology and Biotechnology
Publisher
Springer Netherlands
Publication Date
Sep 11, 2020
Volume
36
Issue
10
Identifiers
DOI: 10.1007/s11274-020-02897-0
Source
Springer Nature
Keywords
License
Green

Abstract

A terrestrial green microalga was isolated at Ås, in Akershus County, Norway. The strain corresponded to a coccoid chlorophyte. Morphological characteristics by light and electron microscopy, in conjunction with DNA amplification and sequencing of the 18 s rDNA gene and ITS sequences, were used to identify the microalgae. The characteristics agree with those of the genus Coelastrella defined by Chodat, and formed a sister group with the recently described C. thermophila var. globulina. Coelastrella is a relatively small numbered genus that has not been observed in continental Norway before; there are no previous cultures available in collections of Norwegian strains. Gas chromatography analyses of the FAME-derivatives showed a high percentage of polyunsaturated fatty acids (44–45%) especially linolenic acid (C18:3n3; 30–34%). After the stationary phase, the cultures were able to accumulate several carotenoids as neoxanthin, pheophytin a, astaxanthin, canthaxanthin, lutein, and violaxanthin. Due to the scarcity of visual characters suitable for diagnostic purposes and the lack of DNA sequence information, there is a high possibility that species of this genus have been neglected in local environmental studies, even though it showed interesting properties for algal biotechnology.

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