Enhancement of the Production of Bioactive Microalgal Metabolites by Ultraviolet Radiation (UVA 365 nm)
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AbstractTwo marine microalgae, Nitzschia closterium and Isochrysis zhangjiangensis, treated for 9 days with photosynthetically active radiation (PAR), were subjected to 3 days of ultraviolet light band A at 365 nm (UVA365) followed by a 3 day post-UVA PAR treatment. Compared with the control that only had PAR treatment, UVA365 treatment significantly (p < 0.05) increased the amounts of total xanthophylls in N. closterium and I. zhangjiangensis by up to 3.53- and 1.23-fold, respectively, after 3 days of UVA365 irradiation. In particular, UVA365 treatment markedly (p < 0.05) increased two major bioactive xanthophyll pigments, fucoxanthin in N. closterium and diadinoxanthin in I. zhangjiangensis, by up to 1.97- and 1.52-fold, respectively. UVA365 treatment significantly (p < 0.05) increased the accumulation of another bioactive microalgal metabolite, total mycosporine-like amino acids, in N. closterium and I. zhangjiangensis by up to 1.40- and 1.30-fold, respectively. UVA365 irradiation has potential as an efficient approach for enhancing the production of valuable microalgal metabolites.
Acceptance Date11/09/2018
All Author(s) ListHuang J.J., Lin S., Xu W., Cheung P.C.K.
Journal nameJournal of Agricultural and Food Chemistry
Volume Number66
Issue Number39
PublisherAmerican Chemical Society
Pages10215 - 10224
LanguagesEnglish-United States
Keywordscarotenoids, diadinoxanthin, fucoxanthin, marine microalgae, mycosporine-like amino acids, ultraviolet band A

Last updated on 2021-01-12 at 23:34