Journal of Oceanology and Limnology

, Volume 36, Issue 4, pp 1315–1328 | Cite as

The first complete organellar genomes of an Antarctic red alga, Pyropia endiviifolia: insights into its genome architecture and phylogenetic position within genus Pyropia (Bangiales, Rhodophyta)

  • Kuipeng Xu (徐奎鹏)
  • Xianghai Tang (唐祥海)
  • Guiqi Bi (毕桂萁)
  • Min Cao (曹敏)
  • Lu Wang (王璐)
  • Yunxiang Mao (茅云翔)


Pyropia species grow in the intertidal zone and are cold-water adapted. To date, most of the information about the whole plastid and mitochondrial genomes (ptDNA and mtDNA) of this genus is limited to Northern Hemisphere species. Here, we report the sequencing of the ptDNA and mtDNA of the Antarctic red alga Pyropia endiviifolia using the Illumina platform. The plastid genome (195 784 bp, 33.28% GC content) contains 210 protein-coding genes, 37 tRNA genes and 6 rRNA genes. The mitochondrial genome (34 603 bp, 30.5% GC content) contains 26 protein-coding genes, 25 tRNA genes and 2 rRNA genes. Our results suggest that the organellar genomes of Py. endiviifolia have a compact organization. Although the collinearity of these genomes is conserved compared with other Pyropia species, the genome sizes show significant differences, mainly because of the different copy numbers of rDNA operons in the ptDNA and group II introns in the mtDNA. The other Pyropia species have 2–3 distinct intronic ORFs in their cox 1 genes, but Py. endiviifolia has no introns in its cox 1 gene. This has led to a smaller mtDNA than in other Pyropia species. The phylogenetic relationships within Pyropia were examined using concatenated gene sets from most of the available organellar genomes with both the maximum likelihood and Bayesian methods. The analysis revealed a sister taxa affiliation between the Antarctic species Py. endiviifolia and the North American species Py. kanakaensis.


Antarctic Pyropia endiviifolia plastid and mitochondrial genomes genome structure phylogenetic 


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Copyright information

© Chinese Society for Oceanology and Limnology, Science Press and Springer-Verlag GmbH Germany, part of Springer Nature 2018

Authors and Affiliations

  • Kuipeng Xu (徐奎鹏)
    • 1
  • Xianghai Tang (唐祥海)
    • 1
  • Guiqi Bi (毕桂萁)
    • 1
  • Min Cao (曹敏)
    • 1
  • Lu Wang (王璐)
    • 1
  • Yunxiang Mao (茅云翔)
    • 1
    • 2
  1. 1.Key Laboratory of Marine Genetics and Breeding (Ocean University of China)Ministry of EducationQingdaoChina
  2. 2.Laboratory for Marine Biology and BiotechnologyQingdao National Laboratory for Marine Science and TechnologyQingdaoChina

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