Abstract：
:Microalgae have emerged as the potential source for value-added products such as polyunsaturated fatty acids (PUFAs). Metabolic engineering of multiple metabolic pathways has promoted eicosapentaenoic acid (EPA) production in microalgae, however, further improvement is warranted owing to the burgeoning demand. Here we improved the microalgal strains by adaptive evolution under hyposalinity treatment, which showed that 70% salinity potentiated the algae to enhance PUFAs. To exploit the maximal PUFA production potential of evolved strains, we subjected evolved algae to light, temperature and fulvic acid treatment. Amongst, fulvic acid (15 mg/L) enhanced growth and achieved the highest EPA content (13.9%) in the evolved diatom. Fulvic acid enhanced antioxidant potential and unprecedently governed the expression of PUFA and lipid biosynthetic genes. Collectively, this investigation demonstrates the efficacy of adaptive evolution empowered by fulvic acid and exemplifies a feasible strain improving strategy to harness the biotechnological potential of microalgae.
journal_name
Bioresour Technoljournal_title
Bioresource technologyauthors
Wang X,Luo SW,Luo W,Yang WD,Liu JS,Li HYdoi
10.1016/j.biortech.2018.12.116subject
Has Abstractpub_date
2019-04-01 00:00:00pages
204-210eissn
0960-8524issn
1873-2976pii
S0960-8524(18)31787-5journal_volume
277pub_type
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