Chlamydomonas neoplanoconvexa nom. nov. and its unique phylogenetic position within Volvocales (Chlorophyceae)

Takashi Nakada, Masaru Tomita

Research output: Contribution to journalArticle

3 Citations (Scopus)

Abstract

Chlamydomonas Ehrenb. is a unicellular volvocalean genus consisting of 400-600 species, most of which are known solely based on microscopy. In this study, a newly isolated strain of Chlamydomonas neoplanoconvexa (M. O. P. Iyengar) Nakada nom. nov. (≡Chlamydomonas planoconvexa M. O. P. Iyengar non J. W. G. Lund) was examined using light microscopy and combined 18S rRNA, rbcL and psaB gene phylogeny. The C. neoplanoconvexa strain was quite similar to Chlamydomonas perpusilla (Korshikov) Gerloff in terms of its small fusiform vegetative cells (∼10μm in length), parietal chloroplast containing a single pyrenoid, and nucleus posterior to the pyrenoid. However, C. neoplanoconvexa was distinguished from C. perpusilla based on the morphology of the papillae and pyrenoids. The two species belong to the clade Caudivolvoxa in the order Volvocales, but are distantly related to each other. Chlamydomonas perpusilla was shown to be sister to Chlorogonium Ehrenb. (clade Chlorogonia, within Caudivolvoxa), while C. neoplanoconvexa represented a second basal lineage within Caudivolvoxa, next to the clade Characiosiphonia. Although the morphology of C. neoplanoconvexa was not particularly outstanding, its unique phylogenetic position will encourage further investigation of this species and its uncultivated relatives.

Original languageEnglish
Pages (from-to)194-199
Number of pages6
JournalPhycological Research
Volume59
Issue number3
DOIs
Publication statusPublished - 2011 Jul

Fingerprint

Chlamydomonas
Chlorophyceae
phylogenetics
microscopy
phylogeny
Microscopy
Chlorogonium
chloroplast
vegetative cells
Chloroplasts
Phylogeny
gene
light microscopy
chloroplasts
Chlamydomonadales
ribosomal RNA
Light
Genes
genes

Keywords

  • Caudivolvoxa
  • Chlamydomonas neoplanoconvexa nom. nov
  • Molecular phylogeny
  • Morphology
  • Pyrenoid
  • Volvocales

ASJC Scopus subject areas

  • Ecology, Evolution, Behavior and Systematics
  • Physiology

Cite this

Chlamydomonas neoplanoconvexa nom. nov. and its unique phylogenetic position within Volvocales (Chlorophyceae). / Nakada, Takashi; Tomita, Masaru.

In: Phycological Research, Vol. 59, No. 3, 07.2011, p. 194-199.

Research output: Contribution to journalArticle

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