Cell type–specific cytonuclear coevolution in three allopolyploid plant species

570 Solitary Nucleus allopolyploids cytonuclear coevolution Cell Differentiation Plastids Biological Sciences DegreeDisciplines::Life Sciences::Plant Sciences::Plant Biology Problem Solving single cell Mitochondria
DOI: 10.1073/pnas.2310881120 Publication Date: 2023-09-25T19:10:33Z
ABSTRACT
Cytonuclear disruption may accompany allopolyploid evolution as a consequence of the merger of different nuclear genomes in a cellular environment having only one set of progenitor organellar genomes. One path to reconcile potential cytonuclear mismatch is biased expression for maternal gene duplicates (homoeologs) encoding proteins that target to plastids and/or mitochondria. Assessment of this transcriptional form of cytonuclear coevolution at the level of individual cells or cell types remains unexplored. Using single-cell (sc-) and single-nucleus (sn-) RNAseq data from eight tissues in three allopolyploid species, we characterized cell type–specific variations of cytonuclear coevolutionary homoeologous expression and demonstrated the temporal dynamics of expression patterns across development stages during cotton fiber development. Our results provide unique insights into transcriptional cytonuclear coevolution in plant allopolyploids at the single-cell level.
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