Selection for Resistance to Rice Sheath Blight Through Number of Infection Cushions and Lesion Type

Groth, D. E.; Nowick, Elaine Maytag

doi:10.1094/pd-76-0721

Cited by 57 publications

(43 citation statements)

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“…Extensive browning could be a defensive strategy by the host to restrict pathogen invasion. Previous reports suggested that browning may be due to the production of oxidized phenolics around the infection court (Groth and Nowick, 1992), hypersensitive reaction (Yamamoto et al 2000, Maruthasalam et al 2007, and rapid cell death mediated by the expression of defense genes upon pathogen invasion (Heath 2000). Similar results were obtained for transgenic rice plants expressing chi11 in detached leaf assay and intact leaf sheath assay by our group earlier Maruthasalam et al 2007.…”

Section: Discussionsupporting

confidence: 82%

Stability of sheath blight resistance in transgenic ASD16 rice lines expressing a rice chi11 gene encoding chitinase

Rajesh¹,

Maruthasalam²,

Kalpana³

et al. 2016

Biologia plant.

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Development of transgenic plants by introducing defense genes is one of the strategies to engineer disease resistance. Transgenic ASD16 rice plants harbouring rice chitinase chi11 gene, belonging to a PR-3 group of defense gene conferring sheath blight (Rhizoctonia solani Kuhn) resistance, were used in this study. Three T 2 homozygous lines (ASD16-4-1-1, 5-1-1, and 6-1-1) were identified from seven putative (T 0 ) transgenic lines expressing chi11 using Western blotting analysis. The inheritance of sheath blight resistance in those lines was studied over generations. The stability of chi11 expression up to T 4 generation in all the three homozygous lines was proved by Western blot and the stability of sheath blight resistance in the homozygous lines was proved up to T 4 generation using detached leaf and intact leaf sheath assays. Among the three homozygous lines tested, ASD16-4-1-1 showed consistent results in all the generations and gave a better protection against the sheath blight pathogen than the other two lines.

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Section: Discussionsupporting

confidence: 82%

Stability of sheath blight resistance in transgenic ASD16 rice lines expressing a rice chi11 gene encoding chitinase

Rajesh¹,

Maruthasalam²,

Kalpana³

et al. 2016

Biologia plant.

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“…Infection cushions of R. solani form most frequently along the edges of the vascular bundles or over stomata. The infection cushions are involved in enzymatic degradation and physical penetration of the leaf surface, providing entrance into the plant for the pathogen (Groth and Nowick 1992).…”

Section: Life Cycle and Epidemiologymentioning

confidence: 99%

Cytomolecular aspects of rice sheath blight caused by Rhizoctonia solani

Taheri

Tarighi

2010

Eur J Plant Pathol

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Sheath blight, caused by anastomosis group 1-IA of Rhizoctonia solani Kühn (teleomorph Thanatephorus cucumeris (Frank) Donk), is one of the most destructive rice diseases worldwide. The pathogen is able to infect plants belonging to more than 27 families, including many economically important monocots and dicots such as rice, wheat, alfalfa, bean, peanut, soybean, cucumber, papaya, corn, potato, tomato and sugar beet. It is a soil borne necrotrophic fungus that survives in plant debris as sclerotia, which are small brown-to-black, rocklike reproductive structures. The sclerotia can survive in the soil for several years and infect rice plants at the water-plant interface in the flooded field by producing mycelia. Management of rice sheath blight requires an integrated approach based on the knowledge of each stage of the disease and cytomolecular aspects of rice defence responses against R. solani. This review summarizes current knowledge on molecular aspects of R. solani pathogenicity, genetic structure of the pathogen populations, and the rice-R. solani interaction with emphasis on cellular and molecular defence components such as signal transduction pathways, various plant hormones, host defence genes and production of defence-related proteins involved in basal and induced resistance in rice against sheath blight disease.

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“…The association between disease development and several morphological plant properties, such as culm length and heading date, has been frequently observed (Hori 1991). In the last 2 decades, transgenic rice lines resistant to sheath blight have been developed (Datta et al 2000, Zhang et al 2001) and significant differences in resistance among rice varieties and lines were confirmed (Pan et al 1999, Wasano et al 1983, Groth and Nowick 1992, Li et al 1995, Zou et al 2000, Kunihiro et al 2002, Han et al 2002, Xie et al 1990). The quantitative resistance in one of the most resistant varieties, Tetep offers excellent protection against the pathogen under field conditions (Wasano et al 1983, Groth andNowick 1992) and this variety shows fewer and smaller lesions, suggesting the presence of physiological mechanisms of resistance (Groth and Nowick 1992).…”

Section: Introductionmentioning

confidence: 99%

Mapping QTLs for Sheath Blight Resistance in the Rice Line WSS2

et al. 2004

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The rice line WSS2 which was derived from the Vietnamese indica variety Tetep, displays a high partial resistance to sheath blight. Quantitative trait locus (QTL) analysis of the resistance using simple sequence repeat (SSR) and sequence-tagged site (STS) markers was conducted in a BC 1 F 1 population derived from the cross Hinohikari/WSS2//Hinohikari. Sheath blight resistance in this population and its cross-parents was studied using syringe inoculation. Two QTLs for sheath blight resistance (qSB-3 and qSB-12) were identified on chromosomes 3 and 12. Their resistance alleles were derived from the resistant parent WSS2. These QTLs totally explained 29.6 % of the phenotypic variation. Sheath blight resistance was significantly correlated with culm length and heading date. Among the QTLs for culm length and heading date, qCL-3 for culm length was located in the same region as qSB-3, and the remaining QTLs were not linked to qSB-12. Thus, it was reasonable to assume that qSB-12 would enable to breed a rice variety resistant to sheath blight.

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Selection for Resistance to Rice Sheath Blight Through Number of Infection Cushions and Lesion Type

Cited by 57 publications

References 0 publications

Stability of sheath blight resistance in transgenic ASD16 rice lines expressing a rice chi11 gene encoding chitinase

Stability of sheath blight resistance in transgenic ASD16 rice lines expressing a rice chi11 gene encoding chitinase

Cytomolecular aspects of rice sheath blight caused by Rhizoctonia solani

Mapping QTLs for Sheath Blight Resistance in the Rice Line WSS2

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