One step closer to eliminating the nomenclatural problems of minute coccoid green algae

Pseudochloris wilhelmii, gen. et sp. nov. (Trebouxiophyceae, Chlorophyta)

Boglárka Somogyi, Tamás Felföldi, K. Solymosi, Kerstin Flieger, K. Márialigeti, B. Böddi, Lajos Vörös

Research output: Contribution to journalArticle

13 Citations (Scopus)

Abstract

'Chlorella' and 'Nannochloris' were traditional genera of minute coccoid green algae with numerous species described in the past century, including isolates used as experimental test organisms. In the last few years, the introduction of DNA-based phylogenetic analyses resulted in a large number of taxonomic revisions. We investigated and reclassified a taxonomically problematic group within the Trebouxiophyceae (comprising 'Nannochloris eucaryotum' UTEX 2502, 'N. eucaryotum' SAG 55.87 and 'Chlorella minutissima' SAG 1.80), distantly related to the recently described Chloroparva isolates (97.5-97.9 % 18S rRNA gene pairwise similarity). Cryopreserved material of SAG 55.87 was selected as holotype for a novel species - Pseudochloris wilhelmii Somogyi, Felföldi & Vörös - whose phylogenetic position confirmed the proposal of a new genus. Pseudochloris wilhelmii had spherical to oval cells with an average diameter of 2.6 × 2.8 μm and a simple ultrastructure characteristic of small green algae. Vegetative cells sometimes contained several lipid droplets occupying a large portion of the cells. The cell wall consisted of an outer trilaminar layer and an inner microfibrillar sheet. Cells divided by autosporulation, forming two or four daughter cells per autosporangium. The pigment composition was typical of green algae, with chlorophylls a and b, and lutein as the dominant carotenoid.

Original languageEnglish
Pages (from-to)427-436
Number of pages10
JournalEuropean Journal of Phycology
Volume48
Issue number4
DOIs
Publication statusPublished - 2013

Fingerprint

green alga
Chlorophyta
Nannochloris
new species
phylogenetics
Chlorella minutissima
cells
ultrastructure
carotenoid
chlorophyll
droplet
new genus
pigment
vegetative cells
phylogeny
Chlorella
chlorophyll a
holotypes
taxonomic revisions
lipid

Keywords

  • 18S rRNA gene analysis
  • brackish
  • Chlorella
  • coccoid chlorophytes
  • green algae
  • marine
  • Nannochloris
  • picoeukaryote
  • Pseudochloris wilhelmii
  • taxonomic revision

ASJC Scopus subject areas

  • Aquatic Science
  • Plant Science

Cite this

One step closer to eliminating the nomenclatural problems of minute coccoid green algae : Pseudochloris wilhelmii, gen. et sp. nov. (Trebouxiophyceae, Chlorophyta). / Somogyi, Boglárka; Felföldi, Tamás; Solymosi, K.; Flieger, Kerstin; Márialigeti, K.; Böddi, B.; Vörös, Lajos.

In: European Journal of Phycology, Vol. 48, No. 4, 2013, p. 427-436.

Research output: Contribution to journalArticle

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