Photoacclimation of Dunaliella tertiolecta (Chlorophyceae) Under Fluctuating Irradiance
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- Havelková-Doušová, H., Prášil, O. & Behrenfeld, M. Photosynthetica (2004) 42: 273. doi:10.1023/B:PHOT.0000040600.04502.32
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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.