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RAVL1 Activates IDD3 to Negatively Regulate Rice Resistance to Sheath Blight Disease 被引量:2
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作者 SUN Qian YANG Shuo +4 位作者 GUO Xiaofan WANG Siting JIA Xintong LI Shuang XUAN Yuanhu 《Rice science》 SCIE CSCD 2021年第2期146-155,共10页
Sheath blight disease (ShB) has a severe impact on the production of rice. ABI3/VP1-like 1(RAVL1) negatively regulated the rice defense mechanism against ShB, however, this regulatorymechanism is not clearly understoo... Sheath blight disease (ShB) has a severe impact on the production of rice. ABI3/VP1-like 1(RAVL1) negatively regulated the rice defense mechanism against ShB, however, this regulatorymechanism is not clearly understood. In this study, we identified that indeterminate domain 3 (IDD3) waspositively regulated by RAVL1. Further, chromatin immunoprecipitation (ChIP) assay, yeast one-hybridassay and transient expression assay indicated a direct binding between RAVL1 and the IDD3 promoterregion. IDD3 was ubiquitously expressed in different tissues and at different stages, and its expressionwas significantly enhanced by Rhizoctonia solani infection. IDD3 exhibited transcription activation activityin yeast and IDD3-GFP was found to be localized in the nucleus. IDD3 mutants exhibited no significantdifferences in response to ShB, while IDD3 overexpressors were more susceptible to ShB compared withwild type (WT) plants. Furthermore, IDD3 repressors were less susceptible to R. solani than WT plants.Interestingly, the expression of brassinosteroid-related genes (D2, D11 and BRI1) was lower in IDD3repressors and higher in IDD3 overexpressors compared with WT. However, the ChIP assay revealedthat IDD3 did not directly bind to the D2 and D11 promoters. Overexpression of IDD3 in BRI1 mutantd61-1 inhibited the activity of IDD3, reducing its susceptibility to ShB compared with IDD3 overexpressorand WT plants, indicating that IDD3 negatively regulated the rice defense mechanism against ShB by activatingthe BR signaling pathway. Thus, our analyses provided information to enhance the understanding of therice defense mechanism against ShB. 展开更多
关键词 sheath blight disease AB13/VP1-like 1 indeterminate domain 3 RICE promoter
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Weedy red rice has novel sources of resistance to biotic stress 被引量:2
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作者 Yulin Jia David Gealy 《The Crop Journal》 SCIE CAS CSCD 2018年第5期443-450,共8页
Weedy red rice(Oryza sativa;WRR),a close relative of cultivated rice,is a highly competitive weed that commonly infests rice fields and can also naturally interbreed with rice.Useful genes for biotic stress have been ... Weedy red rice(Oryza sativa;WRR),a close relative of cultivated rice,is a highly competitive weed that commonly infests rice fields and can also naturally interbreed with rice.Useful genes for biotic stress have been maintained in WRR and can be explored for breeding.Here we describe genetic and physiological traits of WRR that can be beneficial in preventing major rice diseases.Rice blast,caused by the hemibiotrophic fungal pathogen Magnaporthe oryzae,and sheath blight disease,caused by the necrotrophic pathogen Rhizoctonia solani,are the two most damaging biotic stresses of rice.Many major and minor resistance genes and QTL have been identified in cultivated and wild rice relatives.However,novel QTL were recently found in the two major U.S.biotypes of WRR,blackhull-awned(BH)and strawhullawnless(SH),suggesting that WRR has evolved novel genetic mechanisms to cope with these biotic stresses.Twenty-eight accessions of WRR(PI 653412–PI 653439)from the southern USA were characterized and placed in the National Small Grains Collection,and are available for identification of novel genetic factors to prevent biotic stress. 展开更多
关键词 Weedy red rice Oryza sativa Geng Aus Blast disease sheath blight disease
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