Complete mitochondrial genome and phylogenetic analysis of the marine microalga Symbiochlorum hainanensis (Ulvophyceae, Chlorophyta)

Abstract

Symbiochlorum hainanensis Gong et al. (2018). is a unicellular green alga belonging to Ulvophyceae, Chlorophyta, and considered as an important species in coral-algae symbiont areas. In this study, we revealed firstly the mitochondrial genome sequence of the S. hainanensis. This mitochondrial genome was a circular DNA molecule of 59,508 bp, including 24 transfer RNA genes, 3 ribosomal RNA genes, and 31 protein-coding genes. The GC content of the genome was 35.4%. The phylogenetic tree suggested that S. hainandiae was a sister to the OUU clade within the class Ulvophyceae. The mitochondrial genome structure and gene content of S. hainanensis supported that S. hainanensis was a new unidentified green alga in Ulvophyceae.

Keywords:

• Symbiochlorium hainandiae
• mitochondrial genome
• phylogenetic analysis

Ethical approval

The material involved in this paper does not involve endangered or protected species. It requires no specific permissions or licenses. The collection of microalga specimen is legal and reasonable.

Authors’ contribution

Fangfang Yang was involved in the design, acquisition and the drafting of the paper. Lijuan Long was involved in the revision and proving of the paper.

Disclosure statement

No potential conflict of interest was reported by the author(s).

Data availability statement

The genome sequence data that support the findings of this study are openly available in GenBank of NCBI at (https://www.ncbi.nlm.nih.gov/) under the accession no. ON897766. The associated BioProject, SRA, and Bio-Sample numbers are PRJNA844566, SRR19521163, and SAMN28834016, respectively.

Additional information

Funding

This work was supported by National Key R&D Program of China (2022YFC3102002), National Natural Science Foundation of China (42176157), and the GuangDong Basic and Applied Basic Research Foundation (2023A1515011689).