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- W2121429996 abstract "Panicle blast 1 ( Pb1 ) is a panicle blast resistance gene derived from the indica rice cultivar “Modan.” Pb1 encodes a coiled-coil–nucleotide-binding site–leucine-rich repeat (CC-NB-LRR) protein and confers durable, broad-spectrum resistance to Magnaporthe oryzae races. Here, we investigated the molecular mechanisms underlying Pb1 -mediated blast resistance. The Pb1 protein interacted with WRKY45, a transcription factor involved in induced resistance via the salicylic acid signaling pathway that is regulated by the ubiquitin proteasome system. Pb1 -mediated panicle blast resistance was largely compromised when WRKY45 was knocked down in a Pb1 -containing rice cultivar. Leaf-blast resistance by Pb1 overexpression ( Pb1 -ox) was also compromised in WRKY45 knockdown /Pb1 -ox rice. Blast infection induced higher accumulation of WRKY45 in Pb1 -ox than in control Nipponbare rice. Overexpression of Pb1-Quad , a coiled-coil domain mutant that had weak interaction with WRKY45, resulted in significantly weaker blast resistance than that of wild-type Pb1 . Overexpression of Pb1 with a nuclear export sequence failed to confer blast resistance to rice. These results suggest that the blast resistance of Pb1 depends on its interaction with WRKY45 in the nucleus. In a transient system using rice protoplasts, coexpression of Pb1 enhanced WRKY45 accumulation and increased WRKY45-dependent transactivation activity, suggesting that protection of WRKY45 from ubiquitin proteasome system degradation is possibly involved in Pb1-dependent blast resistance." @default.
- W2121429996 created "2016-06-24" @default.
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- W2121429996 date "2013-05-21" @default.
- W2121429996 modified "2023-10-15" @default.
- W2121429996 title "Blast resistance of CC-NB-LRR protein Pb1 is mediated by WRKY45 through protein–protein interaction" @default.
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- W2121429996 doi "https://doi.org/10.1073/pnas.1222155110" @default.
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