Phylogenetic re-evaluation of previously identified Chlamydomonas (Chlorophyta, Chlamydomonadaceae) strains from The Mosonmagyaróvár Algal Culture Collection, Hungary, using molecular data

Katona, Szabina and Horváth, Nándor and Berthold, D. E. and Molnár, Zoltán and Bálint, Péter and Ördög, Vince and Pap, Bernadett and Maróti, Gergely and Bánáti, Ferenc and Szenthe, Kálmán and Vörös, Lajos and Kilgore, C. and Laughinghouse IV, H. D. (2019) Phylogenetic re-evaluation of previously identified Chlamydomonas (Chlorophyta, Chlamydomonadaceae) strains from The Mosonmagyaróvár Algal Culture Collection, Hungary, using molecular data. SOUTH AFRICAN JOURNAL OF BOTANY, 125. pp. 16-23. ISSN 0254-6299

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Abstract

Systematic studies on 70 MACC isolates previously identified as ‘Chlamydomonas’, a unicellular flagellate, were carried out based on partial 18S rRNA. The aim of this study was to determine the phylogenetic affiliations of Chlamydomonas strains in the MACC collection. The study found that most of the strains were not Chlamydomonas. Nine clusters of phylogenetically similar taxa were identified. The previous determinations were completedwith their newphylogenetic affiliations (partly due to changes in green algae classification).Molecular data revealed that 3 of the 70 strains are from Arenicolinia, 14 are members of the phylogroup Stephanosphaerinia, 11 are Oogamochlamydinia, 1 is Chloromonadinia, 19 are Reinhardtinia, 2 are Polytominia, 9 are Scenedesmaceae, 5 areMoewusinia, and 6 are Chlorella. Cladeswere established by 18S rRNA similarity and p-distances. This study reveals the need to revise established culture collections whose isolates are solely identified with morphology.

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