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The complete mitochondrial genome of the green microalgae Dunaliella salina strain SQ.

ABSTRACT: The complete mitochondrial genome of the microalgae Dunaliella salina strain SQ (GenBank accession number: KX641170) was de novo assembled and annotated using Illumina MiSeq sequencing data. The mitochondrial genome is 41,904 bp long with 31.85% GC content and contains 7 protein-coding genes, 16 introns, 3 ribosomal RNA genes and 3 transfer RNA genes. To date, only two complete mitochondrial genomes of Dunaliella salina strains have been reported, and this genome provides knowledge to the study of genetic variations and evolution of mitochondrial genomes of Dunaliella salina strains.

SUBMITTER: Magdaleno D

PROVIDER: S-EPMC7799956 | biostudies-literature | 2017 May

REPOSITORIES: biostudies-literature

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The complete mitochondrial genome of the green microalgae Dunaliella salina strain SQ.

Magdaleno Dante D Lopez Haydee H Stephano Hornedo Jose Luis JL

Mitochondrial DNA. Part B, Resources 20170527 1

The complete mitochondrial genome of the microalgae Dunaliella salina strain SQ (GenBank accession number: KX641170) was de novo assembled and annotated using Illumina MiSeq sequencing data. The mitochondrial genome is 41,904 bp long with 31.85% GC content and contains 7 protein-coding genes, 16 introns, 3 ribosomal RNA genes and 3 transfer RNA genes. To date, only two complete mitochondrial genomes of Dunaliella salina strains have been reported, and this genome provides kn ...[more]

PMID: 33473810

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Project description:BACKGROUND: Recent years have witnessed a rising trend in exploring microalgae for valuable carotenoid products as the demand for lutein and many other carotenoids in global markets has increased significantly. In green microalgae lutein is a major carotenoid protecting cellular components from damage incurred by reactive oxygen species under stress conditions. In this study, we investigated the effects of abiotic stressors on lutein accumulation in a strain of the marine microalga D. salina which had been selected for growth under stress conditions of combined blue and red lights by adaptive laboratory evolution. RESULTS: Nitrate concentration, salinity and light quality were selected as three representative influencing factors and their impact on lutein production in batch cultures of D. salina was evaluated using response surface analysis. D. salina was found to be more tolerant to hyper-osmotic stress than to hypo-osmotic stress which caused serious cell damage and death in a high proportion of cells while hyper-osmotic stress increased the average cell size of D. salina only slightly. Two models were developed to explain how lutein productivity depends on the stress factors and for predicting the optimal conditions for lutein productivity. Among the three stress variables for lutein production, stronger interactions were found between nitrate concentration and salinity than between light quality and the other two. The predicted optimal conditions for lutein production were close to the original conditions used for adaptive evolution of D. salina. This suggests that the conditions imposed during adaptive evolution may have selected for the growth optima arrived at. CONCLUSIONS: This study shows that systematic evaluation of the relationship between abiotic environmental stresses and lutein biosynthesis can help to decipher the key parameters in obtaining high levels of lutein productivity in D. salina. This study may benefit future stress-driven adaptive laboratory evolution experiments and a strategy of applying stress in a step-wise manner can be suggested for a rational design of experiments.

Dataset Information

The complete mitochondrial genome of the green microalgae Dunaliella salina strain SQ.

Publications

The complete mitochondrial genome of the green microalgae <i>Dunaliella salina</i> strain SQ.

Similar Datasets

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