Journal
SCIENTIFIC REPORTS
Volume 10, Issue 1, Pages -Publisher
NATURE PORTFOLIO
DOI: 10.1038/s41598-020-58817-7
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Funding
- Collaborative Genome Program of the Korea Institute of Marine Science and Technology Promotion (KIMST) - Ministry of Oceans and Fisheries (MOF) [20180430]
- Next-generation BioGreen21 Program from the RDA (Rural Development Administration) of the Korean government [PJ01389003]
- National Research Foundation of Korea [NRF-2017R1A2B3001923, NRF-2018 H1A2A1059783]
- project IDEALG (France) [ANR-10BTBR-04]
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Among the brown algal lineages, Ectocarpales species have isogamous fertilization in which male and female gametes are morphologically similar. In contrast, female gametes are much larger than male gametes in the oogamous species found in many other brown algal lineages. It has been reported that the plastids of isogamous species are biparentally inherited whereas the plastids of oogamous species are maternally inherited. In contrast, in both isogamous and oogamous species, the mitochondria are usually inherited maternally. To investigate whether there is any relationship between the modes of inheritance and organellar genome architecture, we sequenced six plastid genomes (ptDNA) and two mitochondrial genomes (mtDNA) of isogamous species from the Ectocarpales and compared them with previously sequenced organellar genomes. We found that the biparentally inherited ptDNAs of isogamous species presented distinctive structural rearrangements whereas maternally inherited ptDNAs of oogamous species showed no rearrangements. Our analysis permits the hypothesis that structural rearrangements in ptDNAs may be a consequence of the mode of inheritance.
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