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

ABSTRACT: The complete chloroplast genome of the microalgae Dunaliella salina strain SQ was determined in this study. The total length of the chloroplast genome is 243,635 bp with 29.73% GC content. The genome is composed by a small single copy (SSC) region of 101,527 bp and a large single-copy region of 107,815 bp separated by two inverted repeats (IR) regions of 17,145 bp. A total of 98 genes were annotated, including 66 coding genes, 3 rRNAs, and 29 tRNAs. This complete plastid genome can be used to elucidate genetic variations in organellar genomes between D. salina strains.

SUBMITTER: Lopez H

PROVIDER: S-EPMC7800116 | biostudies-literature | 2017 Apr

REPOSITORIES: biostudies-literature

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

Lopez Haydee H Magdaleno Dante D Stephano Jose J

Mitochondrial DNA. Part B, Resources 20170413 1

The complete chloroplast genome of the microalgae <i>Dunaliella salina</i> strain SQ was determined in this study. The total length of the chloroplast genome is 243,635 bp with 29.73% GC content. The genome is composed by a small single copy (SSC) region of 101,527 bp and a large single-copy region of 107,815 bp separated by two inverted repeats (IR) regions of 17,145 bp. A total of 98 genes were annotated, including 66 coding genes, 3 rRNAs, and 29 tRNAs. This complete plastid genome can be use ...[more]

PMID: 33473777

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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 chloroplast genome of the green microalgae Dunaliella salina strain SQ.

Publications

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

Similar Datasets

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