Phylogenetic analysis of the ‘Nannochloris-like’ algae and diagnoses of Picochlorum oklahomensis gen. et sp. nov. (Trebouxiophyceae, Chlorophyta)
| Autor: | Mark A. Buchheim, Marvin W. Fawley, Janice L. Hironaka, Laure Guillou, William J. Henley, K. P. Fawley, Julie A. Buchheim |
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| Rok vydání: | 2004 |
| Předmět: | |
| Zdroj: | Phycologia. 43:641-652 |
| ISSN: | 2330-2968 0031-8884 |
| Popis: | A broadly halotolerant new isolate of a small asexual coccoid chlorophyte and six new, related freshwater isolates provided the impetus for a phylogenetic analysis of the so-called ‘Nannochloris-like’ algae within the Trebouxiophyceae. Previous taxonomic disagreements concerning this group had not been rigorously tested with molecular phylogenetic analyses. We show with 1 8S ribosomal DNA (rDNA) sequence phylogeny that 19 of 22 isolates previously assigned to either Nannochloris or Nanochlorum fall within a diverse sister clade to a clade including the four ‘true’ Chlorella species sensu lato. In addition, Marvania geminata, Gloeotila contorta, Chlorella sp. Yanaqocha RA1, Koliella spiculiformis, ‘Chlorella minutissima’ C-1. 1.9, and new Koliella, Gloeotila and Marvania isolates were included in the Nannochloris-like clade. Distinct freshwater and marine or saline lineages comprise at least three major subclades, generally corresponding to cell division pattern. Seven of 14 marine or saline isola... |
| Databáze: | OpenAIRE |
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