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
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..View full abstract
Awarded by Agence Nationale de la Recherche (France) Chaire D' Excellence
R.G. was supported by an Agence Nationale de la Recherche (France) Chaire D' Excellence [ANR-10-CHEX-0011 - 01 to G.C.I.], R.S.-B. by the Marie Curie ITN SIREN, and A.M.W. by a Victorian Government postdoctoral training fellowship.