Photosynthetica

, Volume 42, Issue 2, pp 273–281

Photoacclimation of Dunaliella tertiolecta (Chlorophyceae) Under Fluctuating Irradiance

  • H. Havelková-Doušová
  • O. Prášil
  • M.J. Behrenfeld
Article

DOI: 10.1023/B:PHOT.0000040600.04502.32

Cite this article as:
Havelková-Doušová, H., Prášil, O. & Behrenfeld, M. Photosynthetica (2004) 42: 273. doi:10.1023/B:PHOT.0000040600.04502.32

Abstract

We investigated photoacclimation of Dunaliella tertiolecta (Butcher) in irradiance (I) regimes simulating mixed layer conditions of turbid estuarine waters or lakes. D. tertiolecta was exposed to a range of fixed I regimes to establish baseline physiology-I relationships that were compared with subsequent photoacclimation to a simulated mixed layer. Measured indices of photoacclimation included cellular pigmentation, chlorophyll variable fluorescence, and effective photosystem 2 antenna size. While D. tertiolecta grown under fluctuating I maintained division rates comparable to cells grown at high I, the cells exhibited characteristics of photoacclimation consistent with cells grown under a stable regimes at irradiances considerably lower than the average I of the simulated mixed layer.

absorption and fluorescence excitation spectra carotenoids chlorophylls diurnal course fluorescence induction growth rate photosystem 2 antenna size phytoplankton vertical mixing xanthophyll cycle pigments 

Copyright information

© Kluwer Academic Publishers 2004

Authors and Affiliations

  • H. Havelková-Doušová
    • 1
  • O. Prášil
    • 1
  • M.J. Behrenfeld
    • 2
  1. 1.Institute of MicrobiologyAcademy of Sciences of the Czech Republic, Opatovický mlýn, Třeboň 37981, Czech Republic; Biological Faculty and Institute of Physical Biology, University of South Bohemia, České BudějoviceCzech Republic
  2. 2.NASA Goddard Space Flight CenterGreenbeltUSA