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Conservation and Divergence of YODA MAPKKK Function in Regulation of Grass Epidermal Patterning

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Journal Development
Specialty Biology
Date 2018 Jun 28
PMID 29945871
Citations 18
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Abstract

All multicellular organisms must properly pattern cell types to generate functional tissues and organs. The organized and predictable cell lineages of the leaf enabled us to characterize the role of the MAPK kinase kinase gene in regulating asymmetric cell divisions. We find that YODA genes promote normal stomatal spacing patterns in both and , despite species-specific differences in those patterns. Using lineage tracing and cell fate markers, we show that, unexpectedly, patterning defects in 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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