Next SOL Seminar Online will be presented by Lidor Shaar-Moshe on Are homologous cell types translationally conserved across plant species? Lessons from tomato, rice, and Arabidopsis root atlases
Abstract. All vascular plant roots are arranged with a stem cell niche at the root tip and cell types that form concentric cylinders at the radial axis. Based on morphological and expression data, many plant cell type populations are considered homologous (i.e., derived from a common ancestor). However, the degree to which root cell type developmental programs are molecularly or functionally conserved across plant species is, as of yet, unknown. Here, we generated translatome profiles of the meristematic cortex, endodermis (which includes the quiescent center), vasculature and meristematic zone of tomato (S. lycopersicum) and rice (O. sativa) roots and compared these with previously published translatome profiles of A. thaliana roots. Principal component analyses show that the translatome profiles of the meristematic zone from all three species group together and are distinct from the other cell populations. To identify similarities between homologous tissues, we focused on genes with conserved cell/tissue-enriched expression among the three species. Using expressologs (homologs with correlated expression profiles), we found a subset of genes that showed conserved enriched expression in the root meristem. Furthermore, the meristem had the highest number of overlapping enriched ontology terms compared with the other cell populations demonstrating conserved function. Finally, genes with low expression variation across cell/tissue types are enriched for housekeeping genes as previously reported for animals. Collectively, our results demonstrate cases in which higher-order organizational properties that determine similarities in the expression profile of homologous tissues likely reside in the “architecture” of their associated networks.
When? Friday 5th February 3 pm (GMT+1)
The zoom link to join the meeting is https://cuboulder.zoom.us/j/94333146166 Meeting ID: 943 3314 6166, password: Solanaceae
Watch this talk again here: https://youtu.be/cN8yB4tD0AU