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- W2388638082 abstract "Cell growth, astaxanthin accumulation, photo-adaptive capacity, photochemical properties, and energy distribution models of the cells at different developmental stages of three strains of Haematococcus pluvialis were studied with continuous chlorophyll fluorescence and other techniques. The results showed that photo requirement for photosynthesis varied significantly in green motile cells, green non-motile cells and red non-motile cells. The light saturation points for the motile cells of strain H_0, H_2 and H_3 were 750, 1 000 and 750 μmol /(m~2·s), respectively. The light saturation points for the green non-motile cells of strain H_0, H_2 and H_3 were 750, 750, and 500 μmol/ (m~2·s), respectively. Meanwhile, the light saturation points for astaxanthin enriched non-motile cells of strains H_0, H_2 and H_3 were 500, 750, and 500 μmol /(m~2·s), respectively. Therefore, the sequence of illumination required for maximal photosynthesis in H. pluvialis was strain H_2 strain H_0 strain H_3. The green motile cells required the strongest illumination for their maximal photosynthesis, followed sequentially by the green non-motile cells and the red non-motile cells. The year-round data of specific cell growth rates indicated that Strain H_0 grew fastest in most culture seasons (in September and the period of November to May). The cell growth rates of H_0 in April and November were 2.2 times higher than those of H_3. Strain H_2 grew fast in the period of June to August and in October, although the variation was not so significant. As for astaxanthin accumulation, strain H_0 had high content in January, February, June, September, November and December. Strain H_3 accumulated more astaxanthin in March and May, while Strain H_2 had more in July, August and October. To achieve a high yield of the mass culture in Yunnan, based on the combined the effects of fast cell growth and high cell astaxanthin content, we suggest that strain H_0 should be selected in fall, winter, spring and early summer, when temperature is moderate and light intensity fluctuates relative smoothly. In contrast, strain of H_2 should be selected in hot summer and early fall, when high temperature and abrupt light variation occur. Based on the energy pipe models, we also discussed the possible eco-physiological functions of astaxanthin accumulation in the non-motile cells." @default.
- W2388638082 created "2016-06-24" @default.
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- W2388638082 date "2010-01-01" @default.
- W2388638082 modified "2023-09-25" @default.
- W2388638082 title "Photo-adaptation of three stains of Haematococcus pluvialis and their application" @default.
- W2388638082 hasPublicationYear "2010" @default.
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