A new cyanobacterial genus Altericista and three species, A. lacusladogae sp. nov., A. violacea sp. nov., and A. variichlora sp. nov., described using a polyphasic approach

Research output: Contribution to journalArticlepeer-review

Abstract

Several strains of unicellular cyanobacteria from the culture collection of St. Petersburg State University, St. Petersburg, Russia (CALU), which were preliminary identified as Synechocystis sp., are reclassified in the new genus Altericista. Three new species are proposed, A. lacusladogae, A. violacea, and A. variichlora. The last species produces accessory chlorophylls d and f in cultures illuminated by far-red light, an attribute rarely observed in cyanobacteria, especially in unicellular strains. This genus is morphologically similar to Synechocysis having coccoid cells that divide in two successive planes at right angles, containing no sheath or capsule, and having the lamellar system represented by peripheral concentric thylakoids. Altericista shows ecological, biochemical, and physiological characters unlike those in Synechocystis and has the distinguishing phenotypic characters as follows: freshwater, non-halotolerant ecotype; palmitate and α-linoleate as major fatty acids; and the ability to photoacclimate, including several types of complementary chromatic adaptation. Genetic differences from Synechocystis sp. include 16S rRNA, rpoC1, and rbcL gene sequences, as well as sequence and folding of 16S-23S ITS.

Original languageEnglish
Number of pages13
JournalJournal of Phycology
Early online date9 Jun 2021
DOIs
StateE-pub ahead of print - 9 Jun 2021

Scopus subject areas

  • Aquatic Science
  • Plant Science

Keywords

  • 16S rRNA gene-based phylogeny
  • Chlorophylls d and f
  • complementary chromatic adaptation
  • cyanoprokaryotes/cyanobacteria
  • ITS
  • phycobiliproteins
  • rbcL gene
  • rpoC1 gene
  • Synechocystis
  • FATTY-ACID-COMPOSITION
  • SYNECHOCYSTIS
  • 16S-23S
  • HETEROGENEITY
  • GENETICS
  • cyanobacteria
  • SEQUENCE
  • cyanoprokaryotes
  • ARCHITECTURE
  • 16S RIBOSOMAL-RNA

Fingerprint

Dive into the research topics of 'A new cyanobacterial genus Altericista and three species, A. lacusladogae sp. nov., A. violacea sp. nov., and A. variichlora sp. nov., described using a polyphasic approach'. Together they form a unique fingerprint.

Cite this