The complete mitochondrial genome and phylogenetic analysis of Coscinodiscus wailesii (Coscinodiscophyceae, Bacillariophyta)

Abstract

Coscinodiscus is a species-rich genus with about 400 species described, many of which are harmful algal bloom species with significant negative ecological impact. Despite of their importance in primary production and as harmful algal bloom species, genome data for species in this genus is limited. No mitochondrial genome (mtDNA) of any species in this genus has been reported. Here, the complete mtDNA sequence of the Coscinodiscus wailesii Gran & Angst 1931 was constructed and analyzed. The circular mtDNA was 36,071 bp in length, encoding 64 genes, including 34 protein coding genes (PCGs), 24 transfer RNA (tRNA) genes, 2 ribosomal RNA (rRNA) genes and 4 conserved open reading frames (orfs). The overall AT content of C. wailesii mtDNA was 75.00%, which was slightly lower than that of Melosira undulate (78.40%). Maximum likelihood (ML) phylogenetic analysis using 29 shared proteincoding genes revealed that C. wailesii clustered well with M. undulata, which was the only species of class Coscinodiscophyceae whose mtDNA has been fully constructed. The complete mtDNAs of more Coscinodiscus species will be valuable for studying the evolutionary relationships among species in the genus Coscinodiscus and in the Class of Coscinodiscophyceae.

Interaction of Some Environmental Gradients with Bloom Forming Coscinodiscus Species (Kützing, 1844) in the Upper reaches of Bonny Estuary Rivers State, Niger Delta

“…According to Van Landingham (1968), approximately 400 Cosinodiscus species names are properly published with priority. Coscinodiscus (Coscinodiscophyceae, Bacillariophyta) is a species-rich genus with 174 taxonomically accepted species, among which 49 species have been identified in various coastal regions in China (Huang, et al,2021). Some Coscinodiscus species can form red tides that may cause serious damage to aquaculture through competitive utilization of nutrients or by causing extensive clogging of fishing nets and other equipment (Tetsuya et al,2000;Nishikawa et al,2010) and can cause hypoxia and bring substantial losses to fishery by generating a large amount of sediments (Laing and Gollasch, 2022).…”

Genetic Diversity and Geographical Distribution of the Red Tide Species Coscinodiscus granii Revealed Using a High-Resolution Molecular Marker

“…Diatoms are the most species-rich group of algae, with more than 200,000 estimated species, contributing up to 20% of global primary productivity [ 1 , 2 , 3 ]. Coscinodiscus (Coscinodiscophyceae, Bacillariophyta) is a species-rich genus with 174 taxonomically accepted species (Guiry and Guiry 2022), among which 49 species have been identified in various coastal regions in China [ 4 ]. Some Coscinodiscus species can form red tides that may cause serious damage to aquaculture through competitive utilization of nutrients or by causing extensive clogging of fishing nets and other equipment [ 5 , 6 ] and can cause hypoxia and bring substantial losses to fishery by generating a large amount of sediments [ 7 ].…”

Complete mitochondrial genome of Coscinodiscus granii (Coscinodiscophyceae, Bacillariophyta)

“…The mtDNAs of Mediophyceae and Coscinodiscophyceae each formed a paraphyletic assemblage ( Figure 1(A) ). Coscinodiscus granii (MW435847) was found sister to C. wailesii (Huang et al 2021 ) in a highly supported clade ( Figure 1(A) ). Comparative analysis of mtDNAs revealed many rearrangement events.…”