The plant defence activator acibenzolar-S-methyl primes cowpea [ Vigna unguiculata(L.) Walp.] seedlings for rapid induction of resistance

doi:10.1006/pmpp.2001.0327

Physiological and Molecular Plant Pathology

Volume 58, Issue 5, May 2001, Pages 199-208

https://doi.org/10.1006/pmpp.2001.0327 Get rights and content

Abstract

Cowpea [ Vigna unguiculata(L.) Walp.] seedlings, raised from seeds treated with acibenzolar-S-methyl [benzo(1,2,3)thiadiazole-7-carbothioic acid S-methyl ester; BTH], were inoculated at 7 days old withColletotrichum destructivum . Tissue penetration was reduced markedly and intracellular infection vesicles were invariably restricted to the initially-infected epidermal cells of treated hypocotyls and leaves. The destructive necrotrophic phase of disease development was effectively blocked by a hypersensitive response in these cells, thereby protecting seedlings against damping-off. The enhanced resistance of BTH-treated tissues was associated with rapid, transient increases in the activities of two key enzymes of the phenylpropanoid/flavonoid pathway, phenylalanine ammonia-lyase (PAL) and chalcone isomerase (CHI). Subsequently, there was an early, accelerated accumulation of the isoflavonoid phytoalexins kievitone and phaseollidin in treated hypocotyls. In addition, several protein bands, in the low-molecular weight range, developed in these treated challenged tissues. These responses occurred following inoculation of a normally susceptible cultivar (IT82E-60) with the pathogen, and were not observed in induced, uninoculated tissues. These results suggest that BTH protects cowpea seedlings by potentiating an early defence response rather than by altering the constitutive resistance of tissues.

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Regular ArticleThe plant defence activator acibenzolar-S-methyl primes cowpea [ Vigna unguiculata(L.) Walp.] seedlings for rapid induction of resistance

Abstract

Analytical Biochemistry

Cell

Trends in Plant Science

Physiological and Molecular Plant Pathology

Physiological Plant Pathology

Mycological Research

Tetrahedron Letters

Physiological Plant Pathology

Analytical Biochemistry

Physiological and Molecular Plant Pathology

Trends in Microbiology

Physiological and Molecular Plant Pathology

Salicylic acid in the machinery of hypersensitive cell death and disease resistance

Plant Molecular Biology

Infection process and host specificity of a Colletotrichum species causing anthracnose disease of cowpea,Vigna unguiculata

Mycological Research

Induction and expression of systemic resistance to the anthracnose disease in bean

Plant Pathology

Genetic dissection of acquired resistance to disease

Plant Physiology

The Arabidopsis NPR1/NIM1 protein enhances the DNA binding activity of a subgroup of the TGA family of bZIP transcription factors

The Plant Cell

A comparative study of the development of compatible, incompatible and induced incompatible interactions betweenColletotrichum spp. and Phaseolus vulgaris

Phytopathologische Zeitschrift

Relationship of phytoalexin accumulation to local and systemic protection of bean against anthracnose

Phytopathologische Zeitschrift

A benzothiadiazole derivative induces systemic acquired resistance in tobacco

The Plant Journal

Requirement of salicylic acid for induction of systemic acquired resistance

Science

Benzothiadiazole, a novel class of inducers of systemic acquired resistance, activates gene expression and disease resistance in wheat

The Plant Cell

Protection of Brassica seedlings against downy mildew and damping-off by seed treatment with CGA245704, an activator of systemic acquired resistance

Pesticide Science

A benzothiadiazole primes parsley cells for augmented elicitation of defence responses

Plant Physiology

Influence of salicylic acid on the induction of competence for H2O2elicitation

Plant Physiology

Regular Article
The plant defence activator acibenzolar-S-methyl primes cowpea [ Vigna unguiculata(L.) Walp.] seedlings for rapid induction of resistance

Influence of salicylic acid on the induction of competence for H₂O₂elicitation