Bacterial Blight Resistance in Rice

Kou, Yanjun; Wang, Shiping

doi:10.1002/9781118728475.ch2

Cited by 13 publications

(11 citation statements)

References 111 publications

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“…The recessive xa5 gene encodes TFIIA γ , one of several general transcription factors required for RNA polymerase II. It provides resistance to races of Xoo expressing the cognate TAL effector gene avrxa5 (Kou and Wang ). By analysing Xoo strains from seven countries in Asia, Adhikari et al.…”

Section: Discussionmentioning

confidence: 99%

“…The recessive xa5 gene encodes TFIIAc, one of several general transcription factors required for RNA polymerase II. It provides resistance to races of Xoo expressing the cognate TAL effector gene avrxa5 (Kou and Wang 2013). By analysing Xoo strains from seven countries in Asia, Adhikari et al (1999) showed that most strains from India and Nepal were virulent to xa5, whereas those from China, Indonesia, Korea, Malaysia, and the Philippines were generally avirulent to xa5.…”

Section: Discussionmentioning

confidence: 99%

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Genotypic and Pathotypic Diversity of Xanthomonas oryzae pv. oryzae Strains in Taiwan

Deng

Lin

Shih

et al. 2016

Journal of Phytopathology

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Rice bacterial leaf blight, caused by Xanthomonas oryzae pv. oryzae [(Ishiyama) Swings et al. 1990] (Xoo), is a major rice disease of the second crop season in Taiwan. A total of 88 Xoo strains collected from 10 major rice cultivating areas in Taiwan from 1986, 1997, 2000, 2004, and 2011 were characterized by repetitive‐element PCR (REP‐PCR) fingerprinting and virulence analyses. Among the five genetic clusters identified by the pJEL1/pJEL2 (IS1112‐based) and REP1R‐Dt/REP2‐D [repetitive extragenic palindromic (REP)‐based] primer sets, clusters A, C and D contained Xoo strains from geographically distant regions, which suggests a high frequency of Xoo dispersal in Taiwan. The 88 Xoo strains were evaluated by inoculations on IRBB near‐isogenic lines and five Taiwan rice cultivars. A subset of 45 moderately or highly virulent strains were classified into 15 pathotypes by their compatible or incompatible reactions on IR24 and 12 IRBB near‐isogenic lines, each containing a single resistance gene. Analysis of molecular haplotypes and pathotypes revealed a partial relationship. IRBB5, IRBB21 and IRBB4 were incompatible with 96%, 96% and 73% of the strains, so xa5, Xa21 and Xa4 can recognize most of the Xoo strains in Taiwan and elicit resistance. In contrast, IRBB3 (Xa3), IRBB8 (xa8), IRBB10 (Xa10), IRBB11 (Xa11), IRBB13 (xa13) and IRBB14 (Xa14) were susceptible to almost all of the 45 Xoo strains. Inoculation trials revealed significant differences in the susceptibility of five Taiwan cultivars to Xoo (from high to low susceptibility: Taichung Sen 10 > IR24, Taichung Native 1 > Taichung 192, Taikeng 9, Tainan 11). This study provides useful information for resistance breeding and the development of disease management strategies against bacterial blight disease of rice.

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Section: Discussionmentioning

confidence: 99%

Section: Discussionmentioning

confidence: 99%

Genotypic and Pathotypic Diversity of Xanthomonas oryzae pv. oryzae Strains in Taiwan

Deng

Lin

Shih

et al. 2016

Journal of Phytopathology

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“…xa42 Japanese Xoo races XM14, a mutant of IR24 3 [18] Revised and updated from Ref. [147]. While studying the inheritance of resistance to Xoo isolate PXO61 in five rice cultivars, Sidhu and Khush [47] observed that the same gene conferred resistance in all the cultivars.…”

Section: Resistance To Xoo Race Donor Cultivar Chromosome Referencementioning

confidence: 99%

Genetics and Genomics of Bacterial Blight Resistance in Rice

Vikal¹,

Bhatia²

2017

Advances in International Rice Research

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Rice is an important food crop for half the world's population and has been in cultivation for over 10,000 years. During the last few decades, rice has evolved intricate relationships with associated pathogens and pests, bacterial blight (BB) being one of the most important among them. Utilization of resistant varieties with agricultural management practices is a more effective way to control BB. Of the 42 different resistance (R) genes identified to confer BB resistance, 9 have been isolated and cloned, whereas a few of the avirulence genes and a large number of candidate pathogenicity genes have been isolated from Xanthomonas oryzae pv. oryzae. The complete genome sequences of two different rice subspecies japonica and indica and three different races of BB pathogen are available. Therefore, the interaction between rice-Xoo could be deciphered and pave a way to study the molecular aspects of bacterial pathogenesis and host counter measures like innate immunity and R gene-mediated immunity. Although several of the type III effectors of Xoo have been characterized and the host targets of a few of them identified, a relatively large number of candidate effectors remain to be studied and their functional analysis may provide key for developing broad spectrum and durable resistance to BB.

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“…AtPAD4 as a positive regulator modulates Arabidopsis resistance to biotrophic pathogens in an SA-dependent manner, but as a negative regulator it mediates Arabidopsis resistance to necrotrophic pathogen in a JA-dependent pathway (Glazebrook et al, 1997;Zhou et al, 1998;Brodersen et al, 2006). Xoo is a biotrophic bacterium (Kou and Wang, 2013). These results show that suppressing OsPAD4 compromised Xoo-induced JA accumulation and JAZ8 expression, which is a marker of JA-dependent signaling (Yamada et al, 2012), in local tissues and wound-induced JA accumulation in unwounded systemic tissues ( Figure 5).…”

Section: Ospad4 Is Required For Wound-induced Systemic Resistancementioning

confidence: 99%

Rice OsPAD4 functions differently from Arabidopsis AtPAD4 in host‐pathogen interactions

Liu

et al. 2014

The Plant Journal

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SUMMARYThe extensively studied Arabidopsis phytoalexin deficient 4 (AtPAD4) gene plays an important role in Arabidopsis disease resistance; however, the function of its sequence ortholog in rice is unknown. Here, we show that rice OsPAD4 appears not to be the functional ortholog of AtPAD4 in host-pathogen interactions, and that the OsPAD4 encodes a plasma membrane protein but that AtPAD4 encodes a cytoplasmic and nuclear protein. Suppression of OsPAD4 by RNA interference (RNAi) increased rice susceptibility to the biotrophic pathogen Xanthomonas oryzae pv. oryzae (Xoo), which causes bacteria blight disease in local tissue. OsPAD4-RNAi plants also show compromised wound-induced systemic resistance to Xoo. The increased susceptibility to Xoo was associated with reduced accumulation of jasmonic acid (JA) and phytoalexin momilactone A (MOA). Exogenous application of JA complemented the phenotype of OsPAD4-RNAi plants in response to Xoo. The following results suggest that OsPAD4 functions differently than AtPAD4 in response to pathogen infection. First, OsPAD4 plays an important role in wound-induced systemic resistance, whereas AtPAD4 mediates systemic acquired resistance. Second, OsPAD4-involved defense signaling against Xoo is JA-dependent, but AtPAD4-involved defense signaling against biotrophic pathogens is salicylic acid-dependent. Finally, OsPAD4 is required for the accumulation of terpenoid-type phytoalexin MOA in rice-bacterium interactions, but AtPAD4-mediated resistance is associated with the accumulation of indole-type phytoalexin camalexin.

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Bacterial Blight Resistance in Rice

Cited by 13 publications

References 111 publications

Genotypic and Pathotypic Diversity of Xanthomonas oryzae pv. oryzae Strains in Taiwan

Genotypic and Pathotypic Diversity of Xanthomonas oryzae pv. oryzae Strains in Taiwan

Genetics and Genomics of Bacterial Blight Resistance in Rice

Rice OsPAD4 functions differently from Arabidopsis AtPAD4 in host‐pathogen interactions

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