Effects of light intensity and temperature on photoautotrophic growth of a green microalga, Chlorococcum littorale

Masaki Ota, Motohiro Takenaka, Yoshiyuki Sato, Richard Lee Smith, Hiroshi Inomata

Research output: Contribution to journalArticlepeer-review

26 Citations (Scopus)

Abstract

Abstract A highly CO2-tolerant green alga, Chlorococcum littorale, was investigated at temperatures ranging from 8 to 28 °C, light intensities from 30 to 170 μmol m-2 s-1, a constant CO2 concentration of 5% (v/v) and atmospheric pressure. The experimental results showed that a specific growth rate μ, defined in terms of cell growth rate under a logarithmic growth phase, increased with temperature up to the maximum value (ca. 22 °C), while the μ decreased at higher temperatures. These promotion and inhibition of the cell growth rate were expressed by both a multiple linear regression and a mathematical model taking account of the Arrhenius activation/deactivation energies. Light intensity affected on the cell growth was independently treated in the mathematical model. The proposed growth model agreed well with the experimental data to within 6.6 %, which provides good correlation for both temperature and light intensity effects on the microalgal cell growth.

Original languageEnglish
Article number92
Pages (from-to)24-29
Number of pages6
JournalBiotechnology Reports
Volume7
DOIs
Publication statusPublished - 2015 Sep 1

Keywords

  • Algal growth
  • Chlorococcum littorale
  • Microalgae

ASJC Scopus subject areas

  • Biotechnology
  • Applied Microbiology and Biotechnology

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