Chemical and biological inducers of systemic resistance to pathogens protect cucumber and tobacco plants from damage caused by paraquat and cupric chloride

Oxidative damage has been implicated in the necrotization of plant tissues by incompatible pathogens, including those that induce systemic acquired resistance (SAR). In this study, prooxidant chemicals were employed to evaluate the hypotheses that i) localized oxidative damage that culminates in nec...

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Bibliographic Details
Published in:Phytopathology 1995-10, Vol.85 (10), p.1306-1310
Main Authors: Strobel, N.E. (University of Kentucky, Lexington, KY.), Kuc, J.A
Format: Article
Language:English
Subjects:
ACIFLUORFEN
ACIFLUORFENE
Agrochemicals products
Biological and medical sciences
CHLORATE DE SODIUM
CHLORURE
CLORATO SODICO
CLORUROS
COBRE
COLLETOTRICHUM
CUCUMIS SATIVUS
CUIVRE
FEUILLE
Fundamental and applied biological sciences. Psychology
HOJAS
NECROSE
NECROSIS
NICOTIANA TABACUM
Other agrochemicals used in plant protection (herbicides, fungicides, etc.)
OXIDANTES
OXYDANT
PARACUAT
PARAQUAT
PATOGENICIDAD
Phytopathology. Animal pests. Plant and forest protection
Pollution effects and side effects of agrochemicals on crop plants and forest trees. Other anthropogenic factors
Pollution effects. Side effects of agrochemicals
POUVOIR PATHOGENE
RESISTANCE AUX MALADIES
RESISTANCE INDUITE
RESISTENCIA A LA ENFERMEDAD
RESISTENCIA INDUCIDA
SINTOMAS
SYMPTOME
TOBAMOVIRUS DEL MOSAICO DEL TABACO
TOBAMOVIRUS MOSAIQUE DU TABAC
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Summary:Oxidative damage has been implicated in the necrotization of plant tissues by incompatible pathogens, including those that induce systemic acquired resistance (SAR). In this study, prooxidant chemicals were employed to evaluate the hypotheses that i) localized oxidative damage that culminates in necrosis can induce SAR and ii) SAR can protect tissues from oxidative damage. Paraquat (PQ), acifluorfen (AF), and sodium chlorate (SC) induced SAR to Colletotrichum lagenarium in cucumber. PQ and SC, but not AF also induced SAR to tobacco mosaic virus (local lesions) and Peronospora tabacina in tobacco. Pathogens and chemicals that triggered SAR to pathogens also systemically enhanced resistance to damage by PQ and CuCl2. Local protection from PQ was afforded by salicylate and a synthetic cytokinin known to induce local resistance to pathogens
ISSN:0031-949X
1943-7684
DOI:10.1094/Phyto-85-1306