期刊
JOURNAL OF APPLIED PHYCOLOGY
卷 32, 期 3, 页码 1559-1567出版社
SPRINGER
DOI: 10.1007/s10811-020-02081-9
关键词
Chlorella saccharophila; Ethyl methyl sulfonate; Antenna size; Chlorophyll fluorescence; Flow cytometry
资金
- Department of Biotechnology, Ministry of Science and Technology, Government of India
The efficiency of light utilisation through photosynthesis is the most critical factor for microalgal growth. Microalgae face photo-damage at higher light irradiance due to over absorption of light energy. Photosynthesis becomes light-saturated with the increase in light intensity, primarily due to larger antenna size. The strain improvement with reduced antenna size is thus desirable for the optimum conversion of sunlight to algal biomass. The present work describes the generation of reduced chlorophyll antenna mutants of Chlorella saccharophila by EMS mutagenesis. A high light-acclimated mutant exhibited a 21% reduction in total chlorophyll fluorescence, 37% and 15% reduction in PSII and PSI antenna size respectively, with increased biomass productivity and non-photochemical quenching. All these improved photosynthetic parameters led to a 27% increase in biomass productivity under >= 1200 mu mol photons m(-2) s(-1) light irradiance. The high light tolerance and biomass productivity establish the Chlorella saccharophila as promising algal species to be grown at large scale for biofuels.
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