Induced Resistance to Fusarium Wilt Diseases

Matta, A.

doi:10.1007/978-3-642-73166-2_13

Cited by 27 publications

(13 citation statements)

References 29 publications

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“…Increases in aromatic compounds, enzymes, amino acids, and proteins are ubiquitous responses in plants to pathogenic invasion (Goodman et al 1986Matta 1989van Andel 1966: van Loon 1986. Protein accumulation in fluid containing toxin is reflected in part by (Clark et al 1986).…”

Section: Discussionmentioning

confidence: 99%

Stress-related compounds in xylem fluid of blight-diseased citrus containingFusarium solaninaphthazarin toxins and their effects on the host

Nemec¹

1995

Can. J. Microbiol.

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Naphthazarin toxins of Flksarium solani were detected and quantified by con~petitive enzymelinked immunosorbent assay (ELISA) in xylem fluid of scaffold roots from blight-diseased trees. These toxins alter plant metabolic activity; this study examined their effects an xylem health by measuring physiological components in xylem fluid. Protein concentration in fluid was positively correlated with increases in toxin concentration. In fluid containing about 100 pg . L-I toxin, total amino acids reached levels 2.5 to 3.0 times greater than those in fluid containing no detectable toxin; asparaghe, glutamic acid, proline, glycine, and arginine were the most abundant. Levels of phenylalanine ammonia-lyase, polyphenol oxidase, chlorogenic acid oxidase, and superoxide dismutase activity did not increase in xylem fluid containing toxin, which may be a reason why vascular discoloration did not occur. Xylem fluid containing about 20 pg L-I toxin was associated with a 9-fold increase in total phenolics and a 15-fold increase in peroxidase. Peroxidases were predominantly anionic and may function in defense. Some of these peroxidases may function as lignases. releasing phenolic and other constituents from cells and cell walls. These toxins are known to enhance membrane permeability, which may be the main reason for the accumulation of these stress metabolites in xylem fluid. These data explain the disruption of hydraulic conductivity in blight tree roots and the eventual physiological breakdown of roots on diseased trees.

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Section: Discussionmentioning

confidence: 99%

Stress-related compounds in xylem fluid of blight-diseased citrus containingFusarium solaninaphthazarin toxins and their effects on the host

Nemec¹

1995

Can. J. Microbiol.

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“…It is well established that preinoculation of a plant with an incompatible strain of F. oxysporum (either a nonpathogenic strain or a pathogenic strain belonging to another forma specialis ) results in the mitigation of symptoms when the plant is later inoculated with a compatible pathogen (Matta, 1989). This phenomenon is considered as an expression of induced systemic resistance, a general plant defence response to microbial infection or various stresses.…”

Section: Modes Of Action Of Nonpathogenic F Oxysporummentioning

confidence: 99%

Fusarium oxysporum and its biocontrol

Fravel

Olivain²,

Alabouvette³

2003

New Phytologist

461

282

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Summary Fusarium oxysporum is well represented among the rhizosphere microflora. While all strains exist saprophytically, some are well‐known for inducing wilt or root rots on plants whereas others are considered as nonpathogenic. Several methods based on phenotypic and genetic traits have been developed to characterize F. oxysporum strains. Results showed the great diversity affecting the soil‐borne populations of F. oxysporum. In suppressive soils, interactions between pathogenic and nonpathogenic strains result in the control of the disease. Therefore nonpathogenic strains are developed as biocontrol agents. The nonpathogenic F. oxysporum strains show several modes of action contributing to their biocontrol capacity. They are able to compete for nutrients in the soil, affecting the rate of chlamydospore germination of the pathogen. They can also compete for infection sites on the root, and can trigger plant defence reactions, inducing systemic resistance. These mechanisms are more or less important depending on the strain. The nonpathogenic F. oxysporum are easy to mass produce and formulate, but application conditions for biocontrol efficacy under field conditions have still to be determined.

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“…Although physiological races of this pathogen have not been reported, however, only one vegetative compatibility group (VCG) has been identified (KATAN 1999, ALTINOK andCAN 2010). A pathogenic strain applied to a non-host plant is able to protect it against further infection by its specific formae speciales, which is a well-established phenomenon and has been described as cross-protection or premonition (MATTA 1989). This phenomenon is known as an expression of induced systemic resistance (ISR), a defense mechanism of plant response to microbial infections.…”

Section: Introductionmentioning

confidence: 99%

“…ASM as a potential plant activator has no antimicrobial activity but it activates the SAR signal transduction pathway against a broad spectrum of fungal, bacterial and viral pathogens in many plants (ISHII et al 1999). Induced resistance needs an inducer prior to the pathogen attack; however, the time between the inducer and challenger inoculation is an important factor for the development of induced resistance; it ranges from one to three days for Fusarium wilt diseases (MATTA 1989).…”

Section: Introductionmentioning

confidence: 99%