The Role of Pisatin Tolerance and Degradation in the Virulence of<i>Nectria haematococca</i>on Peas: A Genetic Analysis

Tegtmeier, K. J.

doi:10.1094/phyto-72-608

Cited by 76 publications

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“…It seems probable therefore, that many of the strains tested in this study possess the capability of degrading the cuticle and penetrating the epidermal cell walls of peas. In addition to cutindegrading capability, strains of MPVI which are moderate or strong pathogens on pea have been shown to posse~s moderate to high levels of pisatin demethylating activity which protects them from this phytoalexin which is produced within the pea tissue (VanEtten et al 1980;Tegtmeier & VanEtten 1982).…”

Section: Discussionmentioning

confidence: 99%

Mating behaviour and pathogenicity of New Zealand isolates ofNectria haematococca (Fusarium solani)

Hawthorne¹,

Rees‐George²,

Broadhurst³

1992

New Zealand Journal of Crop and Horticultural Science

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Section: Discussionmentioning

confidence: 99%

Mating behaviour and pathogenicity of New Zealand isolates ofNectria haematococca (Fusarium solani)

Hawthorne¹,

Rees‐George²,

Broadhurst³

1992

New Zealand Journal of Crop and Horticultural Science

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“…The isolates of F. reticulaturn were not tested for pathogenicity. All pea isolates used in this study were tested for pathogenicity on pea, as previously described [16,29]; those that proved to be non-pathogenic are noted in Table 1. Isolates 30-36 were also tested and found to be non-pathogenic on pea.…”

Section: Methodsmentioning

confidence: 99%

Differential toxicity of enantiomers of maackiain and pisatin to phytopathogenic fungi

1992

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“…Phytoalexins have been demonstrated to accumulate rapidly at the site of attempted infection in sufficient quantities to inhibit the in vitro growth of fungi (18,30) and bacteria (9). Virulence of the fungus Nectria haematococca on pea is correlated with the ability to detoxify the phytoalexin pisatin (28 (20). These observations suggest that phytoalexins contribute to disease resistance.…”

mentioning

confidence: 99%

Phytoalexin Accumulation in Arabidopsis thaliana during the Hypersensitive Reaction to Pseudomonas syringae pv syringae

et al. 1992

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Inoculation of leaves of Arabidopsis thaliana (L.) Heynh. with the wheat pathogen, Pseudomonas syringae pv syringae, resulted in the expression of the hypersensitive reaction and in phytoalexin accumulation. No phytoalexin accumulation was detected after infiltration of leaves with a mutant of P. s. syringae deficient in the ability to elicit a hypersensitive reaction; with the crucifer pathogen, Xanthomonas campestris pv campestris; or with 10 milimolar potassium phosphate buffer (pH 6.9). Phytoalexin accumulation was correlated with the restricted in vivo growth of P. s. syringae. A phytoalexin was purified by a combination of reverse phase flash chromatography, thin layer chromatography, followed by reverse phase high performance liquid chromatography. The Arabidopsis phytoalexin was identified as 3-thiazol-2'-yl-indole on the basis of ultraviolet, infrared, mass spectral, 1H-nuclear magnetic resonance, and '3C-nuclear magnetic resonance data.Phytoalexins are low mol wt, antimicrobial compounds of plant origin that accumulate after inoculation with a plant pathogen (14). A number of observations support the hypothesis that phytoalexins play a role in the defense response of plants to pathogens. Phytoalexins are absent in healthy tissues and accumulate after infection by fungal (18,24,30) or bacterial (9, 1 1) pathogens in monocotyledonous plants (24) as well as in dicotyledonous plants (9,18,30). Phytoalexins have been demonstrated to accumulate rapidly at the site of attempted infection in sufficient quantities to inhibit the in vitro growth of fungi (18,30) and bacteria (9). Virulence of the fungus Nectria haematococca on pea is correlated with the ability to detoxify the phytoalexin pisatin (28). Furthermore, transformation of Cochliobolus heterostrophus with the gene encoding pisatin demethylase allowed this maize patho-

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The Role of Pisatin Tolerance and Degradation in the Virulence ofNectria haematococcaon Peas: A Genetic Analysis

Cited by 76 publications

References 0 publications

Mating behaviour and pathogenicity of New Zealand isolates ofNectria haematococca (Fusarium solani)

Mating behaviour and pathogenicity of New Zealand isolates ofNectria haematococca (Fusarium solani)

Differential toxicity of enantiomers of maackiain and pisatin to phytopathogenic fungi

Phytoalexin Accumulation in Arabidopsis thaliana during the Hypersensitive Reaction to Pseudomonas syringae pv syringae

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