The pigment composition, the absorption and fluorescence spectra of Haematococcus in different growth phases was measured in this study. The result showed that the wavelength is excitated at 490nm, two fluorescence emission at 710nm and 730nm in the stage of green cells were observed, while in the stage of red cells, a fluorescence emission only at 730nm was observed. The results suggested there are significant differences in PSI structure, constitute and distribution of chromoprotein in different stage of Haematococcus.
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