کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
2836838 | 1570878 | 2006 | 9 صفحه PDF | دانلود رایگان |
![عکس صفحه اول مقاله: Two PR-1 loci detected in the native cultivated potato Solanum phureja appear differentially expressed upon challenge by late blight Two PR-1 loci detected in the native cultivated potato Solanum phureja appear differentially expressed upon challenge by late blight](/preview/png/2836838.png)
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.
Journal: Physiological and Molecular Plant Pathology - Volume 67, Issues 3–5, September 2005–October 2006, Pages 155–163