Carotenoid Production by Dunaliella salina under Red Light

摘要: The halotolerant photoautotrophic marine microalga Dunaliella salina is one of the richest sources natural carotenoids. Here we investigated effects high intensity blue, red and white light from emitting diodes (LED) on production carotenoids by strains D. under nutrient sufficiency strict temperature control favouring growth. Growth in was associated with carotenoid accumulation a rate oxygen uptake. On transfer to blue light, massive drop content recorded along very rates photo-oxidation. In growth maintained at same as or but without accumulation; stimulated small increase content. data support chlorophyll absorption photons reduce plastoquinone photosystem II, coupled phytoene desaturation plastoquinol:oxygen oxidoreductase, electron acceptor. Partitioning electrons between photosynthesis biosynthesis would depend both photon flux synthase upregulation photoreceptor, phytochrome. Red reduces formation reactive species (ROS) well increases pool size anti-oxidant.