Hypersensitive response of near-isogenic wheat carrying the temperature-sensitive Sr6 allele for resistance to stem rust

Mayama, Shigeyuki; Daly, J.M.; Rehfeld, Dwayne W.; Daly, Cecilia

doi:10.1016/0048-4059(75)90057-0

Cited by 42 publications

(9 citation statements)

References 20 publications

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“…In the wheat-stem rust system, evidence favouring the idea of hypersensitive cell death as the cause of resistance (30,31,(87)(88)(89)(90) contrasts to results suggesting cell collapse as being a mere consequence of a yet unknown preceding resistance mechanism (90)(91)(92)(93)(94)(95)(96)(97).…”

Section: Lignification As a Causal Factor In Resistancementioning

confidence: 75%

Lignin Biosynthesis in Stem Rust Infected Wheat

Moerschbacher

1989

ACS Symposium Series

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Highly resistant wheat varieties exhibit a typical hypersensitive response when infected with an avirulent race of the stem rust fungus. Host cells which are penetrated by a fungal haustorium undergo rapid necrotization, thus depriving the biotrophic parasite of its nutritional basis. This rapid cell death is correlated with the deposition of lignin or lignin-like material in the host cell walls and protoplasts. Inhibition of lignin biosynthesis delays necrotization of penetrated host cells and partially breaks resistance of wheat to stem rust. In resistant plants, an increase in the activities of the general phenylpropanoid pathway and of the specific branch pathway of lignin biosynthesis can be detected at the time of the hypersensitive cell death, contrasting to decreased activities in susceptible near-isogenic plants. The participation of both an elicitor and a suppressor in the signal exchange between host and parasite has been suggested. An elicitor of lignification could be isolated from fungal cell walls. An endogenous suppressor of the resistance reaction was found in wheat cell walls.Lignin, the second most abundant organic compound on earth, is extremely resistant to microbial degradation (1,2) and thus constitutes one of the most effective mechanical barriers against pathogenic invasion (3,4). Consequently, the lignin content of higher plants has long been recognized as an important factor in the resistance against the attack by a myriad of potential pathogens.In addition to its role as a preformed resistance factor, Hijwegen (5) has also proposed active induction of lignification as a defense mechanism of cucumber against Cladosporium.Subsequently, in a number of hostpathogen interactions, induced lignification has been proposed as the active

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Section: Lignification As a Causal Factor In Resistancementioning

confidence: 75%

Lignin Biosynthesis in Stem Rust Infected Wheat

Moerschbacher

1989

ACS Symposium Series

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“…Brown et al (1966) and Ogle & Brown (1971) observed that in some wheat varieties with partial resistance to Puccinia graminis, there was no relationship between host necrosis and the extent of colony development. Previous studies (Mayama et al, 1975) with lines carrying the same gene also showed that cellular response, as indicated by autofluorescence, varied ind~pendently from fungal growth when this was assessed using an assay for glucosamine. Previous studies (Mayama et al, 1975) with lines carrying the same gene also showed that cellular response, as indicated by autofluorescence, varied ind~pendently from fungal growth when this was assessed using an assay for glucosamine.…”

Section: Active Resistance Mechanismsmentioning

confidence: 95%

Mechanisms by Which Genetically Controlled Resistance and Virulence Influence Host Colonization by Fungal and Bacterial Parasites

Crute¹,

Wit²,

Wade³

1985

Mechanisms of Resistance to Plant Diseases

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“…Une autre objection à l'importance de la réac-tion hypersensible dans la résistance provient d'auteurs ayant observé que cette réaction ne provoque pas toujours la mort du parasite ou que le parasite réussit à se développer au-delà de la nécrose réactionnelle avant d'être (ou non) inhibé (Chakravarti, 1966;Mayama et al, 1975;Gousseau et Deverall, 1987;Johal et Rahe, 1988). De même, certains auteurs n'ont pas trouvé de corrélation entre la nécrose et la présence ou l'étendue du développement du parasite (Brown et al, 1966;Ogle et Brown, 1971;Harder et al, 1979aHarder et al, , 1979bRohringer et al, 1979 (Smith, 1982 (Bailey, 1982b (Yoshikawa et al, 1978a(Yoshikawa et al, , 1978bKeen et al, 1981; Long et al, 1985;Rouxel, 1988).…”

Section: Déterminisme Génétiqueunclassified

Les phytoalexines et leur intervention dans la résistance hypersensible aux champignons phytopathogènes

Rouxel¹

1989

Agronomie

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Hypersensitive response of near-isogenic wheat carrying the temperature-sensitive Sr6 allele for resistance to stem rust

Cited by 42 publications

References 20 publications

Lignin Biosynthesis in Stem Rust Infected Wheat

Lignin Biosynthesis in Stem Rust Infected Wheat

Mechanisms by Which Genetically Controlled Resistance and Virulence Influence Host Colonization by Fungal and Bacterial Parasites

Les phytoalexines et leur intervention dans la résistance hypersensible aux champignons phytopathogènes

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