期刊
BIORESOURCE TECHNOLOGY
卷 232, 期 -, 页码 44-52出版社
ELSEVIER SCI LTD
DOI: 10.1016/j.biortech.2017.02.004
关键词
Chlorella vulgaris; 1-Naphthaleneacetic acid (NAA); Lipid; Endogenous hormones; Economic and ecological estimation
资金
- National Natural Science Foundation of China [21676228]
- Scientific Research Fund of Hunan Provincial Education Department [16B254]
- Collaborative Innovation Center of New Chemical Technologies for Environmental Benignity and Efficient Resource Utilization
This study attempted at maximizing biomass and lipid accumulation in Chlorella vulgaris by supplementation of natural abscisic acid (ABA) or synthetic 2,4-dichlorophenoxyacetic acid (2,4-D) and 1-naphthaleneacetic acid (NAA) hormone analogs. Amongst three tested additives, NAA-treatment performed remarkable promoting effect on cell growth and lipid biosynthesis. The favorable lipid productivity (418.6 mg/L/d) of NAA-treated cells showed 1.48 and 2.24 times more than that of 2,4-D and ABA. NAA-treatment also positively modified the proportions of saturated (C16:0 and C18:0) and monounsaturated fatty acids (C18: 1) which were prone to high-quality biofuels-making. Further, NAA-treatment manipulated endogenous phytohormones metabolism leading to the elevated levels of indole-3-acetic acid, jasmonic acid, and salicylic acid and such hormone accumulation might be indispensable for signal transduction in regulating cell growth and lipid biosynthesis in microalgae. In addition, the economic-feasibility and eco-friendly estimation of NAA additive indicated the higher possibilities in developing affordable and scalable microalgal lipids for biofuels. (C) 2017 Elsevier Ltd. All rights reserved.
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