Galletti, Roberta, Johnson, Kim L., Scofield, Simon, San-Bento, Rita, Watt, Andrea M., Murray, James A. H. and Ingram, Gwyneth C.
2015.
DEFECTIVE KERNEL 1 promotes and maintains plant epidermal differentiation.
Development
142
(11)
, pp. 1978-1983.
10.1242/dev.122325
|
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-promoting transcription factors are key, albeit indirect, targets of DEK1 activity. We propose a model in which DEK1 influences HD-ZIP IV gene expression, and thus epidermis differentiation, by promoting cell adhesion and communication in the epidermis.
Item Type: |
Article
|
Date Type: |
Publication |
Status: |
Published |
Schools: |
Biosciences |
Subjects: |
Q Science > QK Botany |
Publisher: |
Company of Biologists |
ISSN: |
0950-1991 |
Date of First Compliant Deposit: |
30 March 2016 |
Date of Acceptance: |
7 April 2015 |
Last Modified: |
17 Nov 2020 12:30 |
URI: |
http://orca.cf.ac.uk/id/eprint/80768 |
Citation Data
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