CELL DIVISION PERIODICITY IN 13 SPECIES OF MARINE PHYTOPLANKTON ON A LIGHT: DARK CYCLE

David M. Nelson, Larry E Brand

Research output: Contribution to journalArticle

89 Scopus citations

Abstract

The division rates of 26 clonal cultures representing 13 species of planktonic marine algae (6 diatoms, 2 flagellated chrysophytes, 2 coccolithophores, 1 cryptomonad flagellate, I dinoflagellate, 1 green alga) were determined every 2 h for 48 h during exponential growth on a 14:10 LD cycle in nutrient‐replete batch culture. Cyclic oscillations in the division rate were detectable in 22 of these clones. Of 14 diatom clones examined, four displayed nearly constant division rates throughout the LD cycle and ten showed strong periodicity favoring division during the light periods. In contrast, all other algae (12 clones) exhibited division rate maxima during periods of darkness, and clearly detectable decreases in cell number for time intervals of 4–8 h during periods of illumination. Intraspecific differences in division periodicity were found among eight clones of the diatom Thalassiosira pseudonana (Hustedt) Hasle & Heimdal and six clones of the coccolithophore Emiliania huxleyi (Lohm.) Hay & Mohler.

Original languageEnglish (US)
Pages (from-to)67-75
Number of pages9
JournalJournal of Phycology
Volume15
Issue number1
DOIs
StatePublished - 1979
Externally publishedYes

Keywords

  • cell division
  • Chaetoceros
  • Chroomonas
  • coccolithophore
  • Cyclotella
  • diatom
  • dinoflagellate
  • Dunaliella
  • Emiliania
  • Hymenomonas
  • Isochrysis
  • light
  • Pavlova
  • periodicity
  • Phaeodactylum
  • phytoplankton
  • Scrippsiella
  • Thalassiosira

ASJC Scopus subject areas

  • Aquatic Science
  • Plant Science

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