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Published on April 23, 2008; 10.1104/pp.108.119487

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Received March 20, 2008
Accepted April 11, 2008

A genome-wide functional investigation into the roles s of receptor-like proteins in Arabidopsis

Guodong Wang , Ursula Ellendorff , Ben Kemp , John W. Mansfield , Alec Forsyth , Kathy Mitchell , Kubilay Bastas , Chun-Ming Liu , Alison Woods-Tor , Cyril Zipfel , Pierre J. G. M. de Wit , Jonathan D. G. Jones , Mahmut Tor , and Bart P. H. J. Thomma *

Plant Research International, B.V., Business Unit of Bioscience, P.O. Box 16, 6700 AA Wageningen, The Netherlands; Laboratory of Phytopathology, Wageningen University, Binnenhaven 5, 6709 PD Wageningen, The Netherlands; University of Warwick, Wellesbourne, Warwick CV35 9EF, United Kingdom; Imperial College London, Division of Biology, Wye Campus, Wye, Ashford, Kent, TN25 5AH, United Kingdom; Center for Signal Transduction & Metabolomics, Institute of Botany, Chinese Academy of Sciences, Nanxincun 20, Fragrance Hill, Beijing 100093, China; Sainsbury Laboratory, John Innes Centre, Norwich Research Park, Norwich NR4 7UH, United Kingdom

* Corresponding author; email: bart.thomma{at}wur.nl.

Receptor-like proteins (RLPs) are cell surface receptors that typically consist of an extracellular LRR-domain, a transmembrane domain and a short cytoplasmatic tail. In several plant species RLPs have been found to play a role in disease resistance, such as the tomato Cf and Ve proteins, and the apple HcrVf2 protein that mediate resistance against the fungal pathogens Cladosporium fulvum, Verticillium spp. and Venturia inaequalis, respectively. In addition, RLPs play a role in plant development; Arabidopsis TMM regulates stomatal distribution, while Arabidopsis CLV2 and its functional maize ortholog FEA2 regulate meristem maintenance. In total, 57 RLP genes have been identified in the Arabidopsis genome and a genome-wide collection of T-DNA insertion lines was assembled. This collection was functionally analyzed with respect to plant growth and development and sensitivity to various stress responses including susceptibility towards pathogens. A number of novel developmental phenotypes were revealed for our CLV2 and TMM insertion mutants. In addition, one AtRLP gene was found to mediate ABA sensitivity and another AtRLP gene was found to influence non-host resistance towards Pseudomonas syringae pv. phaseolicola. This genome-wide collection of Arabidopsis RLP gene T-DNA insertion mutants provides a tool for future investigations into the biological roles of RLPs.






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