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Photoinhibition and β-carotene production from Dunaliellasp.isolated from salt pans of Goa

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العنوان: Photoinhibition and β-carotene production from Dunaliellasp.isolated from salt pans of Goa
المؤلفون: Joseph, Steffy, Ramadoss, Dineshram, Chellandi, Mohandass
المصدر: Biomass Conversion and Biorefinery; 20220101, Issue: Preprints p1-14, 14p
مستخلص: The microalgae Dunaliellais a commercially viable species and is well known for its extreme environmental tolerance and β-carotene production under stressful conditions. We examined the effect of salinity and light intensity on the growth and β-carotene production, respectively, in two different species of Dunaliella: Dunaliellasp. and D. salina, isolated from the salt pans of Goa. Both the species were cultured in growth media with different salinity levels to establish the optimum salinity favouring maximum cell growth. Thereafter, the cells were cultured under optimum NaCl concentration, exposed to a range of light intensity and monitored for β-carotene production. The two species, identified based on their molecular characteristics, displayed a significant difference in growth and β-carotene production. Both D. salinaand Dunaliellasp. achieved a maximum of 11.82 × 106cells mL−1(0.613 µd−1) and 18.76 × 106cells mL−1(0.731 µd−1) at 0.75 M and 0.5 M salinity, respectively. D. salinaaccumulated a large amount of total carotenoid (36.95 pg. cell−1) when cultured at 0.75 M salinity and exposed to high light intensity (1000 µmol m−2S−1). In contrast, the carotenoid content per cell was low in Dunaliellasp. (3.07 pg. cell−1) when cultured under optimal salinity (0.5 M) and high light intensity, indicating photoinhibition. We found that different Dunaliellaspecies exhibit different photo-physiological properties that need further evaluation to identify the right candidate for industrial applications.
قاعدة البيانات: Supplemental Index
الوصف
تدمد:21906815
21906823
DOI:10.1007/s13399-022-03327-x