Identification of resistance sources in wild species of rice against two recently evolved pathotypes ofXanthomonas oryzaepvoryzae

2016 ◽  
Vol 15 (6) ◽  
pp. 558-562 ◽  
Author(s):  
Kumari Neelam ◽  
Jagjeet Singh Lore ◽  
Karminderbir Kaur ◽  
Shivali Pathania ◽  
Kishor Kumar ◽  
...  
Keyword(s):  
Resistance Gene ◽  
Wild Species ◽  
Partial Resistance ◽  
Bacterial Blight ◽  
Immune Reaction ◽  
Rice Production ◽  
Xanthomonas Oryzae ◽  
Oryza Glaberrima ◽  
A Genome ◽  
The Individual

AbstractBacterial blight (BB) of rice caused byXanthomonas oryzaepv.oryzae(Xoo) is a major biotic constraint of rice production in all the major irrigated/lowland rice growing regions of Asia, including Punjab and its adjoining states in India. None of the individual BB resistantXa/xagenes is effective against Punjab pathotypes. In the present study, we have screened 1176 accessions, comprising 1007 accessions of A genome speciesOryza glaberrima, O. barthii, O. nivara, O. rufipogon, O. longistaminata, O. meridionalis, O. glumaepatulaand 169 accessions from ten other wild species having CC, FF, EE, BBCC and CCDD genomes against two most recently evolvedXoopathotypes viz. PbXo-10 and PbXo-8 in Punjab state of India, for two constitutive years 2014 and 2015. Based on 2 years of data, four accessions ofO. glaberrima(IRGC102206, IRGC1022445, IRGC102512 and IRGC102520) and two of theO. longistaminataaccessions (IRGC92624 and IRGC101754) were identified with immune reaction against PbXo-8. For PbXo-10,O. longistaminatashowed large number of accessions with complete to partial resistance followed byO. rufipogon(8),O. nivara(2),O. punctata(2) andO. officinalis(1). Two of theO. longistaminataaccessions IRGC92624 and IRGC92644 from Mali were found to have resistance against both theXoopathotypes indicating presence of BB resistance gene other thanXa21. These can be transferred to elite cultivars ofO. sativafor better management of BB.

Identification and Molecular Mapping of Xa32(t), a Novel Resistance Gene for Bacterial Blight (Xanthomonas oryzae pv. oryzae) in Rice

2009 ◽  
Vol 35 (7) ◽  
pp. 1173-1180 ◽  
Author(s):  
Chong-Ke ZHENG ◽  
Chun-Lian WANG ◽  
Yuan-Jie YU ◽  
Yun-Tao LIANG ◽  
Kai-Jun ZHAO
Keyword(s):  
Resistance Gene ◽  
Bacterial Blight ◽  
Molecular Mapping ◽  
Xanthomonas Oryzae

scholarly journals Cloning of the rice Xo1 resistance gene and interaction of the Xo1 protein with the defense-suppressing Xanthomonas effector Tal2h

2020 ◽  
Author(s):  
Andrew C. Read ◽  
Mathilde Hutin ◽  
Matthew J. Moscou ◽  
Fabio C. Rinaldi ◽  
Adam J. Bogdanove
Keyword(s):  
Resistance Gene ◽  
Resistance Genes ◽  
Bacterial Blight ◽  
Rice Variety ◽  
Susceptible Variety ◽  
Xanthomonas Oryzae ◽  
Physical Interaction ◽  
Bacterial Leaf Streak ◽  
Transcription Activator ◽  
Rice Leaves

AbstractThe Xo1 locus in the heirloom rice variety Carolina Gold Select confers resistance to bacterial leaf streak and bacterial blight, caused by Xanthomonas oryzae pvs. oryzicola and oryzae, respectively. Resistance is triggered by pathogen-delivered transcription activator-like effectors (TALEs) independent of their ability to activate transcription, and is suppressed by variants called truncTALEs common among Asian strains. By transformation of the susceptible variety Nipponbare, we show that one of 14 nucleotide-binding, leucine-rich repeat (NLR) protein genes at the locus, with a zfBED domain, is the Xo1 gene. Analyses of published transcriptomes revealed that the Xo1-mediated response is similar to those of NLR resistance genes Pia and Rxo1 and distinct from that associated with induction of the executor resistance gene Xa23, and that a truncTALE dampens or abolishes activation of defense-associated genes by Xo1. In Nicotiana benthamiana leaves, fluorescently-tagged Xo1 protein, like TALEs and truncTALEs, localized to the nucleus. And, endogenous Xo1 specifically co-immunoprecipitated from rice leaves with a pathogen-delivered, epitope-tagged truncTALE. These observations suggest that suppression of Xo1-function by truncTALEs occurs through direct or indirect physical interaction. They further suggest that effector co-immunoprecipitation may be effective for identifying or characterizing other resistance genes.

scholarly journals Use of Partial Host Resistance in the Management of Bacterial Blight of Rice

Plant Disease ◽  
1999 ◽  
Vol 83 (10) ◽  
pp. 896-901 ◽  
Author(s):  
Tika B. Adhikari ◽  
Anil Shrestha ◽  
Ram Chandra Basnyat ◽  
T. W. Mew
Keyword(s):  
Partial Resistance ◽  
Bacterial Blight ◽  
Yield Loss ◽  
Severe Disease ◽  
Rice Production ◽  
Lowland Rice ◽  
Rice Cultivars ◽  
Production Environment ◽  
Pooled Data ◽  
Progress Curve

The progress of bacterial blight epidemics, caused by Xanthomonas oryzae pv. oryzae, varies with environment. The irrigated lowland rice production environment in central Terai (plain) is less conducive to the disease than the irrigated lowland rice production environment in eastern Terai in Nepal. The effect of partial resistance on bacterial blight was studied in central Terai during the wet seasons of 1994, 1995, and 1996. Three partially resistant rice cultivars, Sabitri, Laxmi, and IR54 (possessing the Xa4 gene), and susceptible check IR24 were included in this study. Analysis of pooled data from the 3 years of experiments indicated that rice cultivars differed in resistance based on three epidemiological parameters: disease severity (DS), area under the disease progress curve (AUDPC), and rate of disease increase (r). Estimates of DS, AUDPC, and r were reduced and yield loss was negligible in the partially resistant cultivar Laxmi compared with the susceptible check IR24. IR54, which has partial resistance to X. oryzae pv. oryzae, also showed low DS, AUDPC, and r, which prevented yield loss due to bacterial blight. The locally adapted cultivar Sabitri showed intermediate estimates of DS, AUDPC, r, and yield loss. Earlier and more severe disease developed in the susceptible check IR24, resulting in a yield loss of 22%. Yield losses were mainly due to reductions in number of tillers, number of grains per panicle, and 1,000-grain weight. These data indicate that the use of rice cultivars with high levels of partial resistance will be an effective tool for the management of bacterial blight in central Terai and similar environments in Nepal.

scholarly journals Resistance Genes and their Interactions with Bacterial Blight/Leaf Streak Pathogens (Xanthomonas oryzae) in Rice (Oryza sativa L.)—an Updated Review

Rice ◽  
2020 ◽  
Vol 13 (1) ◽  
Author(s):  
Nan Jiang ◽  
Jun Yan ◽  
Yi Liang ◽  
Yanlong Shi ◽  
Zhizhou He ◽  
...  
Keyword(s):  
Oryza Sativa ◽  
Bacterial Blight ◽  
Oryza Sativa L ◽  
Rice Production ◽  
Xanthomonas Oryzae ◽  
Bacterial Leaf Streak ◽  
Viral Pathogens ◽  
Effector Genes ◽  
Broad Spectrum Resistance ◽  
Genomic Studies

AbstractRice (Oryza sativa L.) is a staple food crop, feeding more than 50% of the world’s population. Diseases caused by bacterial, fungal, and viral pathogens constantly threaten the rice production and lead to enormous yield losses. Bacterial blight (BB) and bacterial leaf streak (BLS), caused respectively by gram-negative bacteria Xanthomonas oryzae pv. oryzae (Xoo) and Xanthomonas oryzae pv. oryzicola (Xoc), are two important diseases affecting rice production worldwide. Due to the economic importance, extensive genetic and genomic studies have been conducted to elucidate the molecular mechanism of rice response to Xoo and Xoc in the last two decades. A series of resistance (R) genes and their cognate avirulence and virulence effector genes have been characterized. Here, we summarize the recent advances in studies on interactions between rice and the two pathogens through these R genes or their products and effectors. Breeding strategies to develop varieties with durable and broad-spectrum resistance to Xanthomonas oryzae based on the published studies are also discussed.

Identification and Molecular Mapping of Xa32(t), a Novel Resistance Gene for Bacterial Blight (Xanthomonas oryzae pv. oryzae) in Rice

2009 ◽  
Vol 35 (7) ◽  
pp. 1173-1180 ◽  
Author(s):  
Chong-Ke ZHENG ◽  
Chun-Lian WANG ◽  
Yuan-Jie YU ◽  
Yun-Tao LIANG ◽  
Kai-Jun ZHAO
Keyword(s):  
Resistance Gene ◽  
Bacterial Blight ◽  
Molecular Mapping ◽  
Xanthomonas Oryzae
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