Abstract:
:A lot is known about the evolution and architecture of plastid, mitochondrial, and nuclear genomes, but surprisingly little is known about their relative rates of mutation. Most available relative-rate data come from seed plants, which, with few exceptions, have a mitochondrial mutation rate that is lower than those of the plastid and nucleus. But new findings from diverse plastid-bearing lineages have shown that for some eukaryotes the mitochondrial mutation rate is an order of magnitude greater than those of the plastid and nucleus. Here, we explore for the first time relative rates of mutation within the Glaucophyta-one of three main lineages that make up the Archaeplastida (or Plantae sensu lato). Nucleotide substitution analyses from distinct isolates of the unicellular glaucophyte Cyanophora paradoxa reveal 4-5-fold lower rates of mutation in the plastid and nucleus than the mitochondrion, which is similar to the mutational pattern observed in red algae and haptophytes, but opposite to that of seed plants. These data, together with data from previous reports, suggest that for much of the known photosynthetic eukaryotic diversity, plastid DNA mutations occur less frequently than those in mitochondrial DNA.
journal_name
Mol Phylogenet Evoljournal_title
Molecular phylogenetics and evolutionauthors
Smith DR,Jackson CJ,Reyes-Prieto Adoi
10.1016/j.ympev.2014.07.001subject
Has Abstractpub_date
2014-10-01 00:00:00pages
380-4eissn
1055-7903issn
1095-9513pii
S1055-7903(14)00243-7journal_volume
79pub_type
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