TRNA functional signatures classify plastids as late-branching cyanobacteria.

ABSTRACT:

Background

Eukaryotes acquired the trait of oxygenic photosynthesis through endosymbiosis of the cyanobacterial progenitor of plastid organelles. Despite recent advances in the phylogenomics of Cyanobacteria, the phylogenetic root of plastids remains controversial. Although a single origin of plastids by endosymbiosis is broadly supported, recent phylogenomic studies are contradictory on whether plastids branch early or late within Cyanobacteria. One underlying cause may be poor fit of evolutionary models to complex phylogenomic data.

Results

Using Posterior Predictive Analysis, we show that recently applied evolutionary models poorly fit three phylogenomic datasets curated from cyanobacteria and plastid genomes because of heterogeneities in both substitution processes acros

SUBMITTER: Lawrence TJ 

PROVIDER: S-EPMC6902448 | biostudies-literature | 2019 Dec

REPOSITORIES: biostudies-literature