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GrainGenes Reference Report: PRT-21-390

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Reference	PRT-21-390
Title	Differential expression of disease resistance in rice lesion-mimic mutants
Journal	Plant Cell Reports
Year	2002
Volume	21
Pages	390-396
Author	Mizobuchi R [ Show all 7 ]
Abstract	Summary: Lesion-mimic mutants are useful for investigating mechanisms of disease resistance. We have characterized five lesion-mimic mutants of rice (Oryza sativa L.): spotted leaf 5-2 (spl5-2), Spl12, spl13, spl14, and Spl15, that have broad-spectrum resistance to the rice blast fungus Magnaporthe grisea and the bacterial blight pathogen Xanthomonas campestris pv. oryzae. Autofluorescence, a sign of disease resistance response, was detected in leaf-sheath cells of the spl mutants in the absence of pathogens. In addition, three pathogenesis-related genes, PBZ1, PR1, and Cht3, were expressed in spl5-2, Spl12, and Spl15 after the appearance of lesion-mimicry. In contrast, expression of these genes in spl13 and spl14 started before lesion formation. Interestingly, in spl13 and spl14, enhanced resistance to rice blast and bacterial blight was also induced before the appearance of lesion-mimicry. These results demonstrate that disease resistance is differently expressed in the spl mutants
Keyword	[ Hide all but 1 of 47 ] absence bacterial bacterial blight bacterial blight pathogen bacterial-blight blast blast fungus blight broad-spectrum resistance campestris cell chitinase differential expression disease disease resistance disease resistance response enhanced resistance food crops fungus gene gene expression histopathology hosts of plant diseases leaf sheath lesion mimic mutants lesion-mimic magnaporthe grisea messenger rna mutant nucleotide sequence oryza oryza sativa pathogen pathogenesis-related pathogenesis-related genes plant composition plant development plant diseases plant pathogenic bacteria plant pathogenic fungi plant proteins resistance rice rice blast rice blast fungus xanthomonas xanthomonas campestris pv

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