Host and Pathogen Factors Controlling the Rice-X<i>anthomonas oryzae</i> Interaction

White, Frank F.; Yang, Bing

doi:10.1104/pp.109.139360

Cited by 180 publications

(150 citation statements)

References 77 publications

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“…Major resistance genes for Xanthomonas resistance (Xa genes) and blast resistance (Pi genes) were recently reviewed by White and Yang (2009) and Ballini et al (2008), respectively. We selected only a few examples (Pi9 and Xa21) to illustrate the use of these R genes in transgenics.…”

Section: Rice Genes Improving Disease Resistancementioning

confidence: 99%

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Potential Candidate Genes for Improving Rice Disease Resistance

Delteil

Zhang²,

Lessard³

et al. 2010

Rice

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Diseases caused by fungal and bacterial pathogens like Magnaporthe oryzae and Xanthomonas oryzae pv. oryzae are responsible for considerable yield loss. Up to now, in rice, the modification of the expression of more than 60 genes from diverse origins has shown beneficial effects with respect to disease resistance. In this paper, we review this large set of data to identify the best genes and strategies to achieve disease resistance by transgenic approaches. Altered expression of genes involved in signal transduction and transcription may lead to many unwanted side effects, like lesion mimic phenotypes. Moreover, modification of resistance to abiotic stress has been neglected and should be carefully examined in the future. Genes like resistance genes and pathogenesis-related genes can confer broad spectrum and high levels of resistance to several pathogens. Preformed expression of defense is often observed but does not necessarily lead to detrimental effects. Although examples of gene pyramiding are scarce, they suggest that this is a very promising strategy. More field evaluation of the transgenic plants is required to draw final conclusions on the usefulness of these genes for improving disease resistance.

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Section: Rice Genes Improving Disease Resistancementioning

confidence: 99%

“…Many R genes have been identified in rice and most code for NBS-LRR genes White and Yang 2009). After recognition mediated by the R gene, signal transduction occurs and requires regulators such as MAP kinases (Mishra et al 2006).…”

Section: Introductionmentioning

confidence: 99%

Potential Candidate Genes for Improving Rice Disease Resistance

Delteil

Zhang²,

Lessard³

et al. 2010

Rice

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“…Bacterial pathogens can evade or defeat effector-triggered resistance by a variety of genetic changes, which include alterations in effector structure, resulting in loss of R gene-mediated resistance; outright loss or inactivation of cognate effector genes and loss of effector recognition; and acquisition of new effector genes that mediate suppression of R gene-mediated resistance. Recent evidence in rice (Oryza sativa) and wheat (Triticum aestivum) indicate that host resistance to disease also involves genetic variability in dominant traits that are targeted by virulence effectors, which we refer to here as susceptibility (S) genes and are commonly revealed as recessive resistance genes (Liu et al, 2009;White and Yang, 2009). In contrast with the numerous examples of dominant R genemediated resistance, few genetic variations in effector-triggered susceptibility have been characterized (Deslandes et al, 2002;Piffanelli et al, 2004;Iyer-Pascuzzi and McCouch, 2007;White and Yang, 2009).…”

Section: Introductionmentioning

confidence: 99%

Rice xa13 Recessive Resistance to Bacterial Blight Is Defeated by Induction of the Disease Susceptibility Gene Os-11N3

et al. 2010

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The rice (Oryza sativa) gene xa13 is a recessive resistance allele of Os-8N3, a member of the NODULIN3 (N3) gene family, located on rice chromosome 8. Os-8N3 is a susceptibility (S) gene for Xanthomonas oryzae pv oryzae, the causal agent of bacterial blight, and the recessive allele is defeated by strains of the pathogen producing any one of the type III effectors AvrXa7, PthXo2, or PthXo3, which are all members of the transcription activator-like (TAL) effector family. Both AvrXa7 and PthXo3 induce the expression of a second member of the N3 gene family, here named Os-11N3. Insertional mutagenesis or RNA-mediated silencing of Os-11N3 resulted in plants with loss of susceptibility specifically to strains of X. oryzae pv oryzae dependent on AvrXa7 or PthXo3 for virulence. We further show that AvrXa7 drives expression of Os-11N3 and that AvrXa7 interacts and binds specifically to an effector binding element within the Os-11N3 promoter, lending support to the predictive models for TAL effector binding specificity. The result indicates that variations in the TAL effector repetitive domains are driven by selection to overcome both dominant and recessive forms of resistance to bacterial blight in rice. The finding that Os-8N3 and Os-11N3 encode closely related proteins also provides evidence that N3 proteins have a specific function in facilitating bacterial blight disease.

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“…The Xanthomonas inject TALE proteins into the host plant cell, where they enter the nucleus, bind to effector-specific DNA sequences in host gene promoters, and trigger transcription (White and Yang, 2009;Boch et al, 2009). This attribute of TALENs makes them efficient ENs for targeted gene editing.…”

Section: Dujhwhg Jhqrph Hglwlqj Xvlqj Vlwhvshflilf Hqjlqhhuhg Hqgrqxmentioning

confidence: 99%

Targeted genome editing, an alternative tool for trait improvement in horticultural crops

Subburaj

Jin

et al. 2016

Hortic. Environ. Biotechnol.

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Abstract. Improving crops through plant breeding, an important approach for sustainable agriculture, has been utilized to increase the yield and quality of foods and other biomaterials for human use. Crops, including cereals, vegetables, ornamental flowers, fruits, and trees, have long been cultivated to produce high-quality products for human consumption. Conventional breeding technologies, such as natural cross-hybridization, mutation induction through physical or chemical mutagenesis, and modern transgenic tools are often used to enhance crop production. However, these breeding methods are sometimes laborious and complicated, especially when attempting to improve desired traits without inducing pleiotropic effects. Recently, targeted genome editing (TGE) technology using engineered nucleases, including meganucleases, zinc finger nucleases (ZFNs), transcription activator-like effector nucleases (TALENs), and clustered regularly interspaced short palindromic repeat (CRISPR) nucleases, has been used to improve the traits of economically important plants. TGE has emerged as a novel plant-breeding tool that represents an alternative approach to classical breeding, but with higher mutagenic efficiency. Here, we briefly describe the basic principles of TGE and the types of engineered nucleases utilized, along with their advantages and disadvantages. We also discuss their potential use to improve the traits of horticultural crops through genome engineering.

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Host and Pathogen Factors Controlling the Rice-Xanthomonas oryzae Interaction

Cited by 180 publications

References 77 publications

Potential Candidate Genes for Improving Rice Disease Resistance

Potential Candidate Genes for Improving Rice Disease Resistance

Rice xa13 Recessive Resistance to Bacterial Blight Is Defeated by Induction of the Disease Susceptibility Gene Os-11N3

Targeted genome editing, an alternative tool for trait improvement in horticultural crops

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