Complete chloroplast genome of Odontella aurita (Mediophyceae, Bacillariophyta).

Abstract

Odontella aurita is an oblong shaped diatom with long spines and often forming chains. This is one of ubiquitous marine planktonic species occurs from the temperate to arctic regions. The species was subject to taxonomic and ecological studies, however, there is no chloroplast genome determined yet. The water sample was collected from the Sihwaho (37˚1837.10N 126˚3619.0E the west coast of Korea) by using plankton net (10 um mash) and the Odontella aurita SH036 isolated under the microscope. We have sequenced and annotated the chloroplast genome (ptDNA) of the strain by using NGS technology. Complete ptDNA length is 120.3 kb with 31.9% of GC and a pair of inverted repeats (IR 2 X 7,725 bp). The circular ptDNA contains 167 genes, including 129 protein-coding genes, 6 rRNAs, and 30 tRNAs. The ptDNA of O. aurita was compared to that of Trieres chinensis [recorded as Odontella sinensis in Genbank NC_001713 119.7 kb, 31.8% GC, a pair of IR (2 X 7,872 bp), and 128 protein-coding genes], the closely related species from all available diatoms data. Two ptDNAs showed significant size differences in 23 CDS and intergenic regions, and number of ORF. New ptDNA data may useful for better understanding on the genetic diversity, evolution, and ecological monitoring of the diatom.ies, however, there is no chloroplast genome determined yet. The water sample was collected from the Sihwaho (37˚1837.10N 126˚3619.0E the west coast of Korea) by using plankton net (10 um mash) and the Odontella aurita SH036 isolated under the microscope. We have sequenced and annotated the chloroplast genome (ptDNA) of the strain by using NGS technology. Complete ptDNA length is 120.3 kb with 31.9% of GC and a pair of inverted repeats (IR 2 X 7,725 bp). The circular ptDNA contains 167 genes, including 129 protein-coding genes, 6 rRNAs, and 30 tRNAs. The ptDNA of O. aurita was compared to that of Trieres chinensis [recorded as Odontella sinensis in Genbank NC_001713 119.7 kb, 31.8% GC, a pair of IR (2 X 7,872 bp), and 128 protein-coding genes], the closely related species from all available diatoms data. Two ptDNAs showed significant size differences in 23 CDS and intergenic regions, and number of ORF. New ptDNA data may useful for better understanding on the genetic diversity, evolution, and ecological monitoring of the diatom.