Pathogenesis-related gene expression in rice is correlated with developmentally controlled Xa21-mediated resistance against Xanthomonas oryzae pv. oryzae |
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| Authors: | Grisel Ponciano Masayasu Yoshikawa Jamie L Lee Pamela C Ronald Maureen C Whalen |
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| Institution: | aDepartment of Biology, San Francisco State University, 1600 Holloway Avenue, San Francisco, CA 94132, USA;bDepartment of Plant Pathology, 1 Shields Avenue, University of California, Davis, CA 95616, USA;cUSDA Western Regional Research Center, 800 Buchanan Street, Albany, CA 94710, USA |
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| Abstract: | Disease resistance mediated by the resistance gene Xa21 is developmentally controlled in rice. We examined the relationship between Pathogenesis Related (PR) defense gene expression and Xa21-mediated developmental disease resistance induced by Xanthomonas oryzae pv. oryzae (Xoo). OsPR1a, OsPR1b, and OsPR1c genes were cloned and their induction was analyzed, in addition to the OsPR10a gene, at the juvenile and adult stages in response to a wildtype Xoo strain that induces a resistance response (incompatible interaction) and an isogenic mutant Xoo strain that does not (compatible interaction). We found that the adult stage leaves are more competent to express these OsPR1 genes and that the Xa21 locus is required for the highest levels of induction. |
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| Keywords: | Oryza sativa var indica Xanthomonas oryzae pv oryzae Pathogenesis-related proteins Developmental disease resistance Adult plant resistance Quantitative real time PCR |
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