The plastid genome of mycoheterotrophic monocot petrosavia stellaris exhibits both gene losses and multiple rearrangements

Maria D. Logacheva, Mikhail I. Schelkunov, Maxim S. Nuraliev, Tagir H. Samigullin, Aleksey A. Penin

Research output: Contribution to journalArticlepeer-review

60 Citations (Scopus)

Abstract

Plastid genomes of nonphotosynthetic plants represent a perfect model for studying evolution under relaxed selection pressure. However, the information on their sequences is still limited. We sequenced and assembled plastidgenome of Petrosavia stellaris, a rare mycoheterotrophic monocot plant. After orchids, Petrosavia represents only the second family of nonphotosynthetic monocots to have its plastidgenome examined. Several unusual features were found: retention of the ATP synthasegenes and rbcL gene; extensive gene order rearrangement despite a relative lack of repeat sequences; an unusually short inverted repeat region that excludes most of the rDNA operon; and a lack of evidence for accelerated sequence evolution. Plastome of photosynthetic relative of P. stellaris, Japonolirion osense, has standard gene order and does not have the predisposition to inversions. Thus, the rearrangements in the P. stellaris plastome are the most likely associated with transition to heterotrophic way of life.

Original languageEnglish
Pages (from-to)238-246
Number of pages9
JournalGenome Biology and Evolution
Volume6
Issue number1
DOIs
Publication statusPublished - 2014
Externally publishedYes

Keywords

  • Gene loss
  • Genome rearrangements
  • Mycoheterotrophy
  • Petrosaviales
  • Plastid genome

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