Journal article

DEFECTIVE KERNEL 1 promotes and maintains plant epidermal differentiation

Roberta Galletti, Kim L Johnson, Simon Scofield, Rita San-Bento, Andrea M Watt, James AH Murray, Gwyneth C Ingram

DEVELOPMENT | COMPANY OF BIOLOGISTS LTD | Published : 2015

Abstract

During plant epidermal development, many cell types are generated from protodermal cells, a process requiring complex co-ordination of cell division, growth, endoreduplication and the acquisition of differentiated cellular morphologies. Here we show that the Arabidopsis phytocalpain DEFECTIVE KERNEL 1 (DEK1) promotes the differentiated epidermal state. Plants with reduced DEK1 activity produce cotyledon epidermis with protodermal characteristics, despite showing normal growth and endoreduplication. Furthermore, in non-embryonic tissues (true leaves, sepals), DEK1 is required for epidermis differentiation maintenance. We show that the HD-ZIP IV family of epidermis-specific differentiation-pro..

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University of Melbourne Researchers