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.
Original language | English |
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Pages (from-to) | 155-163 |
Number of pages | 9 |
Journal | Physiological and Molecular Plant Pathology |
Volume | 67 |
Issue number | 3-5 |
DOIs | |
Publication status | Published - Sept 2006 |
Externally published | Yes |
Keywords
- Late blight resistance
- PR-1 genes
- Pathogenesis-related proteins
- Phytophthora infestans
- Potato
- Solanum phureja