Comparisons of flowering plant genomes reveal multiple rounds of ancient polyploidy characterized by large intra-genomic syntenic blocks. Three such whole genome duplication (WGD) events, designated as rho (ρ), sigma (σ), and tau (τ), have been identified in the genomes of cereal grasses. Precise dating of these WGD events is necessary to investigate how they have influenced diversification rates, evolutionary innovations, and genomic characteristics such as the GC profile of protein coding sequences. The timing of...
Data from: Gα and regulator of G-protein signaling (RGS) protein pairs maintain functional compatibility and conserved interaction interfaces throughout evolution despite frequent loss of RGS proteins in plantsDieter Hackenberg, Michael McKain, Soon-Goo Lee, Swarup Roy Choudhury, Tyler McCann, Spencer Schreier, Alex Harkess, J. Chris Pires, Gane Ka-Shu Wong, Joseph Jez, Elizabeth Kellogg, Sona Pandey, Soon Goo Lee, Joseph M. Jez, Michael R. McKain & Elizabeth A. Kellogg
Signaling pathways regulated by heterotrimeric G-proteins exist in all eukaryotes. The regulator of G-protein signaling (RGS) proteins are key interactors and critical modulators of the Gα protein of the heterotrimer. However, while G-proteins are widespread in plants, RGS proteins have been reported to be missing from the entire monocot lineage, with two exceptions. A single amino acid substitution-based adaptive coevolution of the Gα:RGS proteins was proposed to enable the loss of RGS in monocots. We...
Data from: Timing of rapid diversification and convergent origins of active pollination within Agavoideae (Asparagaceae)Michael R. McKain, Joel R. McNeal, P. Roxanne Kellar, Luis E. Eguiarte, J. Chris Pires, James Leebens-Mack & Jim Leebens-Mack
PREMISE OF THE STUDY: Yucca species are ideal candidates for the study of coevolution due to the obligate mutualism they form with yucca moth pollinators (genera Tegeticula and Parategeticula). Yuccas are not the only species to exhibit a mutualism with yucca moths; the genus Hesperoyucca is pollinated by the California yucca moth (Tegeticula maculata). Relationships among yuccas, Hesperoyucca, and other members of subfamily Agavoideae are necessary to understand the evolution of this unique pollination syndrome....
Current phylogenetic sampling reveals that dioecy and an XY sex chromosome pair evolved once or possibly twice in the genus Asparagus. Although there appear to be some lineage-specific polyploidization events, the base chromosome number of 2n=2x=20 is relatively conserved across the Asparagus genus. Regardless, dioecious species tend to have larger genomes than hermaphroditic species. Here we test whether this genome size expansion in dioecious species is related to a polyploidization and subsequent chromosome fusion or...
Data from: Comprehensive identification and clustering of CLV3/ESR-related (CLE) genes in plants finds groups with potentially shared functionDavid M. Goad, Chuanmei Zhu & Elizabeth A. Kellogg
CLV3/ESR (CLE) proteins are important signaling peptides in plants. The short CLE peptide (12–13 amino acids) is cleaved from a larger pre-propeptide and functions as an extracellular ligand. The CLE family is large and has resisted attempts at classification because the CLE domain is too short for reliable phylogenetic analysis and the pre-propeptide is too variable. We used a model-based search for CLE domains from 57 plant genomes and used the entire pre-propeptide for comprehensive...
Donald Danforth Plant Science Center5
University of Georgia4
University of Missouri4
Washington University in St. Louis2
University of Alberta1
National Autonomous University of Mexico1
University of Wisconsin-Madison1
Agricultural Research Council1
New York Botanical Garden1
University of Reggio Calabria1