We found a match
Your institution may have access to this item. Find your institution then sign in to continue.
- Title
Large Diversity of Nonstandard Genes and Dynamic Evolution of Chloroplast Genomes in Siphonous Green Algae (Bryopsidales, Chlorophyta).
- Authors
Cremen, Ma Chiela M.; Leliaert, Frederik; Marcelino, Vanessa R.; Verbruggen, Heroen
- Abstract
Chloroplast genomes have undergone tremendous alterations through the evolutionary history of the green algae (Chloroplastida). This study focuses on the evolution of chloroplast genomes in the siphonous green algae (order Bryopsidales). We present five new chloroplast genomes, which along with existing sequences, yield a data set representing all but one families of the order. Using comparative phylogeneticmethods, we investigated the evolutionary dynamics of genomic features in the order. Our results show extensive variation in chloroplast genome architecture and intron content. Variation in genome size is accounted for by the amount of intergenic space and freestanding open reading frames that do not show significant homology to standard plastid genes. We show the diversity of these nonstandard genes based on their conserved protein domains, which are often associated with mobile functions (reverse transcriptase/intron maturase, integrases, phage- or plasmid-DNA primases, transposases, integrases, ligases). Investigation of the introns showed proliferation of group II introns in the early evolution of the order and their subsequent loss in the core Halimedineae, possibly through RT-mediated intron loss.
- Subjects
GREEN algae; CHLOROPLAST DNA; GENETICS; BIOLOGICAL evolution; GENOME size; PROTEIN domains
- Publication
Genome Biology & Evolution, 2018, Vol 10, Issue 4, p1048
- ISSN
1759-6653
- Publication type
Article
- DOI
10.1093/gbe/evy063