@article {Houdan_etal2005,
	title = {{Comparison of photosynthetic responses in diploid and haploid life cycle phases of Emiliania huxleyi (Prymnesiophyceae)}},
	journal = {Marine Ecology Progress series},
	volume = {292},
	year = {2005},
	pages = {139{\textendash}146},
	abstract = {Emiliania huxleyi is a ubiquitous coccolithophore, capable of forming large blooms. This species presents a digenetic heteromorphic life cycle, the non-motile diploid phase typically bearing coccoliths and the flagellated haploid phase being non-calcified. Oxygen production rates at different irradiances of both phases were studied in mid-exponential and transitional growth phases in cultures grown under identical conditions. There were no significant differences in basic photosynthetic parameters ($\alpha$chl a , maximum light utilization coefficient; Pchl amax, the light-saturated maximal rate of photosynthesis; Ek, the light-saturation parameter) between the 2 life-cycle phases; however, whereas the diploid phase did not exhibit photoinhibition at irradiances up to 1000 {\textmu}mol photons m{\textendash}2 s{\textendash}1, photoinhibition was recorded in the haploid phase above 400 to 500 {\textmu}mol photons m{\textendash}2 s{\textendash}1 and photosynthetic rate decreased to ca. 75\% of Pmax at 1400 {\textmu}mol photons m{\textendash}2 s{\textendash}1. The 2 phases cultured under identical (non-saturating in terms of light) conditions did not present any significant differences in pigment content. These results are discussed in an ecological context. The lack of photoinhibition could confer a competitive advantage on the diploid stage, notably in a turbulent environment. For the haploid stage, the occurrence of photoinhibition may indicate niche separation (spatial and/or temporal) relative to the diploid phase.},
	author = {Houdan, A and Probert, Ian and Van Lenning, K and S{\'e}bastien Lefebvre}
}
