Title
Two PR-1 loci detected in the native cultivated potato Solanum phureja appear differentially expressed upon challenge by late blight
Date Issued
01 September 2006
Access level
metadata only access
Resource Type
journal article
Author(s)
Evers D.
Schweitzer C.
Nicot N.
Gigliotti S.
Hausman J.
Hoffmann L.
Trognitz B.
Dommes J.
Ghislain M.
International Potato Center
Abstract
Plant pathogenesis-related proteins are toxic to invading pathogens. Among them, the subfamily PR-1 represents low-molecular weight proteins of unknown biochemical function. Here, we describe the cloning and isolation of two PR-1 genes (PR-1b1 (GenBank accession no. SPH493450) and PR-1b2 (SPH493451)) that encode predicted basic proteins. We isolated them from Solanum phureja, a native Andean potato with horizontal resistance to late blight, caused by the oomycete Phytophthora infestans. We demonstrate that the PR-1 genes belong to a small multigene family with an estimated copy number of 4-6 with one of them located on chromosome IX as determined by genetic mapping. The expression of PR-1 genes was different in late blight resistant and susceptible genotypes. Therefore, we propose that both PR-1 genes may play a role in horizontal late blight resistance of S. phureja. © 2006 Elsevier Ltd. All rights reserved.
Start page
155
End page
163
Volume
67
Issue
May 3
Language
English
OCDE Knowledge area
Ciencias de las plantas, Botánica
Biología
Subjects
Scopus EID
2-s2.0-33744519076
Source
Physiological and Molecular Plant Pathology
ISSN of the container
10961178
Sponsor(s)
The authors are grateful to Laurent Solinhac for his excellent technical help and Henry-Michel Cauchie for support in the statistical analyses. We thank Francine Govers (Wageningen, The Netherlands) for the potato PR-1 probe ( AJ250136 ) and JA van Kan (Wageningen, The Netherlands) for the tomato PR-1 probe ( M69248 ). This work was financially supported by the Ministry of Finance (Luxembourg).
Sources of information:
Directorio de Producción Científica
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