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A single-cell Arabidopsis root atlas reveals developmental trajectories in wild-type and cell identity mutants

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Item Type:Article
Title:A single-cell Arabidopsis root atlas reveals developmental trajectories in wild-type and cell identity mutants
Creators Name:Shahan, R. and Hsu, C.W. and Nolan, T.M. and Cole, B.J. and Taylor, I.W. and Greenstreet, L. and Zhang, S. and Afanassiev, A. and Vlot, A.H.C. and Schiebinger, G. and Benfey, P.N. and Ohler, U.
Abstract:In all multicellular organisms, transcriptional networks orchestrate organ development. The Arabidopsis root, with its simple structure and indeterminate growth, is an ideal model for investigating the spatiotemporal transcriptional signatures underlying developmental trajectories. To map gene expression dynamics across root cell types and developmental time, we built a comprehensive, organ-scale atlas at single-cell resolution. In addition to estimating developmental progressions in pseudotime, we employed the mathematical concept of optimal transport to infer developmental trajectories and identify their underlying regulators. To demonstrate the utility of the atlas to interpret new datasets, we profiled mutants for two key transcriptional regulators at single-cell resolution, shortroot and scarecrow. We report transcriptomic and in vivo evidence for tissue trans-differentiation underlying a mixed cell identity phenotype in scarecrow. Our results support the atlas as a rich community resource for unraveling the transcriptional programs that specify and maintain cell identity to regulate spatiotemporal organ development.
Keywords:Transcriptomics, Arabidopsis, Root, scRNA-seq, Development, Cell Fate, SHORTROOT, SCARECROW
Source:Developmental Cell
Publisher:Cell Press
Page Range:543-560
Date:28 February 2022
Official Publication:https://doi.org/10.1016/j.devcel.2022.01.008
PubMed:View item in PubMed
Related to:
https://edoc.mdc-berlin.de/19092/Preprint version

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