Journal
DEVELOPMENT
Volume 145, Issue 14, Pages -Publisher
COMPANY BIOLOGISTS LTD
DOI: 10.1242/dev.165860
Keywords
Asymmetric cell division; MAPK pathway; Stomata; Brachypodium; Comparative development
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Funding
- National Science Foundation graduate research fellowship
- Stanford graduate fellowship
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All multicellular organisms must properly pattern cell types to generate functional tissues and organs. The organized and predictable cell lineages of the Brachypodium leaf enabled us to characterize the role of the MAPK kinase kinase gene BdYODA1 in regulating asymmetric cell divisions. We find that YODA genes promote normal stomatal spacing patterns in both Arabidopsis and Brachypodium, despite species-specific differences in those patterns. Using lineage tracing and cell fate markers, we show that, unexpectedly, patterning defects in bdyoda1 mutants do not arise from faulty physical asymmetry in cell divisions but rather from improper enforcement of alternative cellular fates after division. These cross-species comparisons allow us to refine our understanding of MAPK activities during plant asymmetric cell divisions.
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