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The family of Peps and their precursors in Arabidopsis : differential expression and localization but similar induction of pattern-triggered immune responses
JournalArticle (Originalarbeit in einer wissenschaftlichen Zeitschrift)
 
ID 2283665
Author(s) Bartels, Sebastian; Lori, Martina; Mbengue, Malick; van Verk, Marcel; Klauser, Dominik; Hander, Tim; Böni, Rainer; Robatzek, Silke; Boller, Thomas
Author(s) at UniBasel Merker, Sebastian
Year 2013
Title The family of Peps and their precursors in Arabidopsis : differential expression and localization but similar induction of pattern-triggered immune responses
Journal Journal of experimental botany
Volume 64
Number 17
Pages / Article-Number 5309-21
Keywords Arabidopsis, AtPep, DAMP, danger peptide, endogenous elicitor, PROPEP, PTI
Abstract

In Arabidopsis thaliana, the endogenous danger peptides, AtPeps, have been associated with plant defences reminiscent of those induced in pattern-triggered immunity. AtPeps are perceived by two homologous receptor kinases, PEPR1 and PEPR2, and are encoded in the C termini of the PROPEP precursors. Here, we report that, contrary to the seemingly redundant AtPeps, the PROPEPs fall at least into two distinct groups. As revealed by promoter-β-glucuronidase studies, expression patterns of PROPEP1-3, -5, and -8 partially overlapped and correlated with those of the PEPR1 and -2 receptors, whereas those of PROPEP4 and -7 did not share any similarities with the former. Moreover, bi-clustering analysis indicated an association of PROPEP1, -2, and -3 with plant defence, whereas PROPEP5 expression was related to patterns of plant reproduction. In addition, at the protein level, PROPEPs appeared to be distinct. PROPEP3::YFP (fused to yellow fluorescent protein) was present in the cytosol, but, in contrast to previous predictions, PROPEP1::YFP and PROPEP6::YFP localized to the tonoplast. Together with the expression patterns, this could point to potentially non-redundant roles among the members of the PROPEP family. By contrast, their derived AtPeps, including the newly reported AtPep8, when applied exogenously, provoked activation of defence-related responses in a similar manner, suggesting a high level of functional redundancy between the AtPeps. Taken together, our findings reveal an apparent antagonism between AtPep redundancy and PROPEP variability, and indicate new roles for PROPEPs besides plant immunity.

Publisher Oxford University Press
ISSN/ISBN 0022-0957
edoc-URL http://edoc.unibas.ch/dok/A6205507
Full Text on edoc No
Digital Object Identifier DOI 10.1093/jxb/ert330
PubMed ID http://www.ncbi.nlm.nih.gov/pubmed/24151300
ISI-Number WOS:000327510900009
Document type (ISI) Journal Article
 
   

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