Blue-Red LED wavelength shifting strategy for enhancing beta-carotene production from halotolerant microalga, Dunaliella salina

Sang-Il Han; Sok Kim; Changsu Lee; Yoon-E Choi

doi:10.1007/s12275-019-8420-4

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Blue-Red LED wavelength shifting strategy for enhancing beta-carotene production from halotolerant microalga, Dunaliella salina: Sang-Il Han ¹, Sok Kim ¹, Changsu Lee ², Yoon-E Choi ¹; Journal of Microbiology 2019;57(2):101-106
DOI: https://doi.org/10.1007/s12275-019-8420-4
Published online: September 28, 2018

¹Division of Environmental Science and Ecological Engineering, Korea University, Seoul 02841, Republic of Korea, ²Microbiology and Functionality Research Group, World Institute of Kimchi, Gwangju 61755, Republic of Korea¹Division of Environmental Science and Ecological Engineering, Korea University, Seoul 02841, Republic of Korea, ²Microbiology and Functionality Research Group, World Institute of Kimchi, Gwangju 61755, Republic of Korea

Corresponding author: Yoon-E Choi , Tel: +82-2-3290-3042,

Received: 2 August 2018 • Revised: 17 September 2018 • Accepted: 28 September 2018

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Abstract

In the present study, to improve the photosynthetic betacarotene productivity of Dunaliella salina, a blue-red LED wavelength-shifting system (B-R system) was investigated. Dunaliella salina under the B-R system showed enhanced density and beta-carotene productivity compared to D. salina cultivated under single light-emitting diode light wavelengths (blue, white, and red light-emitting diode). Additionally, we developed blue light-adapted D. salina (ALE-D. salina) using an adaptive laboratory evolution (ALE) approach. In combination with the B-R system applied to ALE-D. salina (ALE B-R system), the beta-carotene concentration (33.94 ± 0.52 μM) was enhanced by 19.7% compared to that observed for the non-ALE-treated wild-type of D. salina (intact D. salina) under the B-R system (28.34 ± 0.24 μM).

Keywords: Dunaliella salina; beta-carotene; light-emitting diode; wavelength shift; adaptive laboratory evolution

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Blue-Red LED wavelength shifting strategy for enhancing beta-carotene production from halotolerant microalga, Dunaliella salina

J. Microbiol. 2019;57(2):101-106. Published online September 28, 2018

DOI: https://doi.org/10.1007/s12275-019-8420-4

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