Enhanced coproduction of astaxanthin and lipids by the green microalga Chromochloris zofingiensis: Selected phytohormones as positive stimulators

Chen, Junhui and Wei, Dong and Lim, Phaik Eem (2020) Enhanced coproduction of astaxanthin and lipids by the green microalga Chromochloris zofingiensis: Selected phytohormones as positive stimulators. Bioresource Technology, 295. p. 122242. ISSN 0960-8524

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Official URL: https://doi.org/10.1016/j.biortech.2019.122242

Abstract

Phytohormones comprise a variety of trace bioactive compounds that can stimulate cell growth and promote metabolic shifts. In the present work, a two-stage screening strategy was innovatively established to identify positive phytohormones for enhancement of astaxanthin and lipid coproduction in microplate-based cultures of mixotrophic Chromochloris zofingiensis. The results showed that auxins were the most efficient stimulators for astaxanthin accumulation. The maximum content of 13.1 mg/g and yield of 89.9 mg/L were obtained using indole propionic acid (10 mg/L) and indoleacetic acid (7.8 mg/L), representing the highest levels of astaxanthin in this microalga reported to date. Total lipids with the highest content (64.5% DW) and productivity (445.7 mg/L/d) were coproduced with astaxanthin using indoleacetic acid. Statistical analysis revealed close relations between phytohormones and astaxanthin and lipid biosynthesis. This study provides a novel original strategy for improving astaxanthin and lipid coproduction in C. zofingiensis using the selected phytohormones as positive stimulators. © 2019 Elsevier Ltd

Item Type: Article
Uncontrolled Keywords: Chromochloris zofingiensis; Astaxanthin; Lipids; Phytohormones; Induction
Subjects: Q Science > Q Science (General)
Q Science > QH Natural history
T Technology > T Technology (General)
Divisions: Deputy Vice Chancellor (Research & Innovation) Office > Institute of Ocean and Earth Sciences
Depositing User: MR Faizal II H
Date Deposited: 23 Dec 2015 02:33
Last Modified: 11 Nov 2019 02:28
URI: http://eprints.um.edu.my/id/eprint/15239

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