Carotenoid biosynthetic gene expression, pigment and n-3 fatty acid contents in carotenoid-rich Tetraselmis striata CTP4 strains under heat stress combined with high light

被引：25

作者：

Schuler, Lisa M. ^{[1
]}

Bombo, Gabriel ^{[1
,2
]}

Duarte, Paulo ^{[1
]}

Santos, Tamara F. ^{[1
]}

Maia, Ines B. ^{[1
]}

Pinheiro, Filipa ^{[1
]}

Marques, Jose ^{[1
]}

Jacinto, Rita ^{[2
]}

Schulze, Peter S. C. ^{[2
]}

Pereira, Hugo ^{[2
]}

Barreira, Luisa ^{[1
,2
]}

Varela, Joao C. S. ^{[1
,2
]}

机构：

[1] Univ Algarve, Ctr Marine Sci, Marine Biotechnol Grp, Campus Gambelas, P-8005139 Faro, Portugal

[2] Univ Algarve, Green Colab Assoc Oceano Verde, Campus Gambelas, P-8005139 Faro, Portugal

来源：

BIORESOURCE TECHNOLOGY | 2021年 / 337卷

关键词：

Microalgae; Random mutagenesis; Flow cytometry; Lutein; EPA; PHYTOENE DESATURASE; MICROALGAE; LUTEIN; FLUORESCENCE; NITROGEN; PATHWAY;

D O I：

10.1016/j.biortech.2021.125385

中图分类号：

S2 [农业工程];

学科分类号：

0828 ;

摘要：

In this study, two carotenoid-rich strains of the euryhaline microalga Tetraselmis striata CTP4 were isolated by random mutagenesis combined with selection via fluorescence activated cell sorting and growth on norflurazon. Both strains, ED5 and B11, showed an up to 1.5-fold increase in carotenoid contents as compared with the wildtype, independent of the growth conditions. More specifically, violaxanthin, beta-carotene and lutein contents reached as high as 1.63, 4.20 and 3.81 mg g-1 DW, respectively. Genes coding for phytoene synthase, phytoene desaturase, lycopene-beta-cyclase and epsilon-ring hydroxylase involved in carotenoid biosynthesis were found to be upregulated in ED5 and B11 cells as compared to the wildtype. Both strains showed higher contents of eicosapentaenoic acid as compared with those of the wildtype, reaching up to 4.41 and 2.88 mg g-1 DW, respectively. Overall, these results highlight the complexity of changes in carotenoid biosynthesis regulation that are required to improve pigment contents in microalgae.

引用

页数：11