SYSTEMIC ACQUIRED RESISTANCE AS A STRATEGY FOR DISEASE MANAGEMENT IN ROCKMELON (CUCUMIS MELO VAR. RETICULATUS)

2007 ◽  
pp. 205-210 ◽  
Author(s):  
R. McConchie ◽  
K. McDonald ◽  
B. Anwaral ◽  
S.C. Morris
Keyword(s):  
Disease Management ◽  
Cucumis Melo ◽  
Systemic Acquired Resistance ◽  
Acquired Resistance

Salicylic Acid And Acibenzolar-s-methyl Induced Resistance Against Toxic Effect Of Juglone, A Toxin Of Mycosphaerella Fijiensis Causal Agent Of Banana Black Leaf Streak Disease

2014 ◽  
Vol 3 (3) ◽  
pp. 204-217
Author(s):  
AMARI Ler-N'Ogn Dadé Georges Elisée ◽  
CHERIF Mamadou ◽  
Hilaire Tanoh Kouakou ◽  
CAMARA Brahima ◽  
KONÉ Daouda
Keyword(s):  
Salicylic Acid ◽  
Disease Management ◽  
Toxic Effect ◽  
Systemic Acquired Resistance ◽  
Acquired Resistance ◽  
Mycosphaerella Fijiensis ◽  
Low Concentrations ◽  
Black Leaf Streak ◽  
Black Leaf Streak Disease ◽  
Banana Leaves

Salicylic acid and its analogues are considered the most important compounds which can be activated a systemic acquired resistance (SAR) in plants. The disadvantages and limits related to the usual methods in particular fungicide spray to the control of black leaf streak disease (BLSD) require research of approaches more respectful of the environment for this disease management such as the use of SAR inducers. The effects of Salicylic acid (SA) and Acibenzolar-S-methyl (ASM) on the interaction of two susceptible cultivars of banana (Orishele and Corne 1) with the hemibiotrophic fungal Mycosphaerella fijiensis and his toxin (juglone) were investigated. The results showed that SA and ASM at low concentrations (25 and 50 µg/ml) did not affect M. fijiensis development but have the capacity to induce protection into sensitive banana against juglone toxic effect. These SAR inducers reduced the intensity of the necrosis due to the juglone and lengthened the incubation period of M. fijiensis after inoculation of banana leaves. The expression of the resistance induced was related to the variety of banana. More significant effectiveness of protection was obtained with ASM in particular on Corne 1. A total protection against the induction of necrosis was kept up to 100 µg/ml of juglone 2 to 3 weeks after application of ASM on the soil and on the leaves of banana. ASM constitutes a viable and noncontaminant option in the fight against to BLSD because of his non-inhibiting action on M. fijiensis and excellent protection into banana when roots and leaves were treated.

scholarly journals Induction of Antiviral Responses by Acibenzolar-S-Methyl Against Cucurbit chlorotic yellows virus in Melon

2013 ◽  
Vol 103 (9) ◽  
pp. 960-965 ◽  
Author(s):  
Minoru Takeshita ◽  
Mitsuru Okuda ◽  
Shiori Okuda ◽  
Ayaka Hyodo ◽  
Kaori Hamano ◽  
...  
Keyword(s):  
Cucumis Melo ◽  
Systemic Acquired Resistance ◽  
Marker Gene ◽  
Acquired Resistance ◽  
Disease Symptoms ◽  
Antiviral Responses ◽  
Pathogenesis Related ◽  
Emerging Virus ◽  
Systemic Symptoms ◽  
Cucurbit Chlorotic Yellows Virus

Cucurbit chlorotic yellows virus (CCYV) (family Closteroviridae, genus Crinivirus) is an emerging virus which causes severe diseases on melon (Cucumis melo) plants. CCYV-infected melon plants display yellowing, mottling, chlorosis, or chlorotic spots on leaves. To develop a new control strategy, the potential for 1,2,3-benzothiadiazole-7-thiocarboxylic acid-S-methyl-ester (ASM) to suppress CCYV infection was evaluated. ASM treatment on melon plants greatly increased the expression levels of pathogenesis-related 1a gene, a marker gene for systemic acquired resistance. ASM treatment on melon plants before inoculation of CCYV suppressed systemic symptoms and decreased CCYV accumulation. ASM treatment on melon even after inoculation of CCYV reduced disease severity and accumulation levels of CCYV. The results show the potential for ASM treatment on attenuation of the CCYV disease symptoms.

scholarly journals Studies on biochemical mechanism of resistance for the management of Marssonina leaf blotch of apple caused by Marssonina coronaria (Ellis & J. J. Davis) J. J. Davis

2015 ◽  
Vol 7 (2) ◽  
pp. 719-724
Author(s):  
S. Phurailatpam ◽  
J. N. Sharma
Keyword(s):  
Disease Management ◽  
Plant Disease Resistance ◽  
Systemic Acquired Resistance ◽  
Management Practices ◽  
Acquired Resistance ◽  
Reducing Sugar ◽  
Mechanism Of Resistance ◽  
Marssonina Coronaria ◽  
Sampling Intervals ◽  
Induce Resistance

To study the mechanism of resistance developed in three different cultivars of apple viz; Starking Delicious, Tydeman’s Early Worcester and Granny Smith against Marssonina coronaria , after treatment with SAR inducing chemicals salicylic acid (SA), dipotassium phosphate (K2HPO4) and acibenzolar-S-methyl (ASM) contents of total phenol, reducing sugar, non -reducing sugar and activities of polyphenol oxidase (PPO), and peroxidase (POD) were assayed at three sampling periods (48,72 and 96 hours). The results revealed that SA treated leaves of cultivar Granny Smith recorded highest amount of phenol (49,53.66,57.33 mg/g), reducing sugar (16,16.33,17.66 mg/g), non-reducing sugar (2.90,3.13,3.53 mg/g) content, peroxidase (30,29.33,36) and polyphenol (26,30,34) activity in all the sampling intervals followed ASM and K2HPO4 treated plants. When compared among the cultivars maximum production was observed highest in cultivar Granny Smith which was followed by cultivars Tydeman’s Early Worcester and Starking Delicious. The present study showed that application of systemic acquired resistance (SAR) chemical can induce resistance in apple plants against Marssonina blotch caused by M. coronaria showing strong correlation between the ability of elicitors to enhanced plant disease resistance and elicitation of defence related enzymes. Thus, using SAR chemicals to induce resistance to apple against Marssonina blotch caused by M. coronaria, may provide a practical supplement to an environmentally friendly disease management when it is combined with appropriate integrated disease management practices.

Probenazole induces systemic acquired resistance in Arabidopsis with a novel type of action

2001 ◽  
Vol 25 (2) ◽  
pp. 149-157 ◽  
Author(s):  
Keiko Yoshioka ◽  
Hideo Nakashita ◽  
Daniel F. Klessig ◽  
Isamu Yamaguchi
Keyword(s):  
Systemic Acquired Resistance ◽  
Acquired Resistance

Isolation and Characterization of Broad-Spectrum Disease-Resistant Arabidopsis Mutants

Genetics ◽  
2002 ◽  
Vol 160 (4) ◽  
pp. 1661-1671
Author(s):  
Klaus Maleck ◽  
Urs Neuenschwander ◽  
Rebecca M Cade ◽  
Robert A Dietrich ◽  
Jeffery L Dangl ◽  
...  
Keyword(s):  
Pseudomonas Syringae ◽  
Systemic Acquired Resistance ◽  
Acquired Resistance ◽  
Constitutive Expression ◽  
Firefly Luciferase ◽  
Marker Genes ◽  
Arabidopsis Mutants ◽  
Isolation And Characterization ◽  
Firefly Luciferase Gene

Abstract To identify Arabidopsis mutants that constitutively express systemic acquired resistance (SAR), we constructed reporter lines expressing the firefly luciferase gene under the control of the SAR-inducible PR-1 promoter (PR-1/luc). After EMS mutagenesis of a well-characterized transgenic line, we screened 250,000 M2 plants for constitutive expression of the reporter gene in vivo. From a mutant collection containing several hundred putative mutants, we concentrated on 16 mutants lacking spontaneous hypersensitive response (HR) cell death. We mapped 4 of these constitutive immunity (cim) mutants to chromosome arms. Constitutive expression of disease resistance was established by analyzing responses to virulent Peronospora parasitica and Pseudomonas syringae strains, by RNA blot analysis for endogenous marker genes, and by determination of salicylic acid levels in the mutants. The variety of the cim phenotypes allowed us to define distinct steps in both the canonical SAR signaling pathway and a separate pathway for resistance to Erysiphe cichoracearum, active in only a subset of the mutants.

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