RRC ID 59268
Author Kim YE, Matter IA, Lee N, Jung M, Lee YC, Choi SA, Lee SY, Kim JR, Oh YK.
Title Enhancement of astaxanthin production by Haematococcus pluvialis using magnesium aminoclay nanoparticles.
Journal Bioresour Technol
Abstract Improving the content and production of high-value ketocarotenoid pigments is critical for the commercialization of microalgal biorefineries. This study reported the use of magnesium aminoclay (MgAC) nanoparticles for enhancement of astaxanthin production by Haematococcus pluvialis in photoautotrophic cultures. Addition of 1.0 g/L MgAC significantly promoted cellular astaxanthin biosynthesis (302 ± 69 pg/cell), presumably by inducing tolerable oxidative stress, corresponding to a 13.7-fold higher production compared to that in the MgAC-untreated control (22 ± 2 pg/cell). The lipid content and cell size of H. pluvialis improved by 13.6- and 2.1-fold, respectively, compared to that of the control. Despite reduced cell numbers, the overall astaxanthin production (10.3 ± 0.4 mg/L) improved by 40% compared to the control (7.3 ± 0.6 mg/L), owing to improved biomass production. However, an MgAC dosage above 1.0 g/L inhibited biomass production by inducing electrostatic cell wall destabilization and aggregation. Therefore, MgAC-induced stimulation of algae varies widely based on their morphological and physiological characteristics.
Volume 307
Pages 123270
Published 2020-7-1
DOI 10.1016/j.biortech.2020.123270
PII S0960-8524(20)30542-3
PMID 32253126
MeSH Magnesium Microalgae* Nanoparticles* Xanthophylls
IF 6.669
Algae NIES-144