Journal of Applied Phycology

, Volume 8, Issue 2, pp 131–137

Effect of blue-green light on growth rate and chemical composition of three diatoms

Authors

  • María del Pilar Sánchez-Saavedra
    • Departamento de AcuiculturaCentro de Investigación Cientifica y de Educación Superior de Ensenada
  • Domenico Voltolina
    • Departamento de AcuiculturaCentro de Investigación Cientifica y de Educación Superior de Ensenada
Article

DOI: 10.1007/BF02186316

Cite this article as:
del Pilar Sánchez-Saavedra, M. & Voltolina, D. J Appl Phycol (1996) 8: 131. doi:10.1007/BF02186316

Abstract

The diatomsChaetoceros sp.,Skeletonema costatum andThalassiosira pseudonana were grown with different irradiances of white and of blue-green light, and with a mixture of blue-green plus 6.5 μmol m−2 s−1 of white light. Exponential growth rates were higher in mixed blue for the first two, whileT. pseudonana grew faster in white light but, in all cases, mean cell division rates did not differ with increasing irradiances. Harvesting in stationary, rather than in late exponential growth phase, resulted in higher protein contents forChaetoceros sp. andS. costatum, but forT. pseudonana the highest value was in the exponential phase. The highest protein content was in blue-green light for the three species and it increased with irradiance. As to other fractions, the three strains showed different responses, related to quality and quantity, as well as to culture ages.

Key words

diatom cultures light quality irradiance growth rate chemical composition Chaetoceros sp. Skeletonema costatum Thalassiosira pseudonana

Copyright information

© Kluwer Academic Publishers 1996