GrainGenes Reference Report: PMB-40-847
Reference
PMB-40-847
Title
Chemical induction of disease resistance in rice is correlated with the expression of a gene encoding and nucleotide binding site and leucine-rich repeats
Journal
Plant Molecular Biology
Year
2000
Pages
847-855
Author
Sakamoto AU
[ Show all 7 ]
Abstract
Probenazole (3-allyloxy-1,2-benzisothiazole-1,1-dioxide) is an agricultural chemical primarily used to prevent rice blast disease. Probenazole-treated rice acquires resistance to blast fungus irrespective of the rice variety. The chemical is applied prophylactically, and is thought to induce or bolster endogenous plant defenses. However, the mechanisms underlying this effect have not been established. To understand the mode of the chemical's action, we screened for novel probenazole-responsive genes in rice by means of differential display and identified a candidate gene, RPR1. RPR1 contains a nucleotide binding site and leucine-rich repeats, thus sharing structural similarity with known disease resistance genes. The expression of RPR1 in rice can be up-regulated by treatment with chemical inducers of systemic acquired resistance (SAR) and by inoculation with pathogens. RPR1-related sequences in rice varieties seem to be varied in sequence and/or expression, indicating that RPR1 itself is not a crucial factor for induced resistance in rice. However, Southern blot analysis revealed the existence of homologous sequences in all varieties examined. While the role of RPR1 has yet to be clarified, this is the first report of the identification of a member of this gene class and its induction during the systemic expression of induced disease resistance
Keyword
GrainGenes is a product of the Agricultural Research Service of the US Department of Agriculture.
GrainGenes Reference Report: PMB-40-847
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GrainGenes is a product of the Agricultural Research Service of the US Department of Agriculture. | |||