Acibenzolar-S-methyl induced resistance to Phytophthora capsici in pepper leaves
Baysal, O.(Turkish Ministry of Agriculture and Rural Affairs, Antalya (Turkey))E-mail:[email protected] | Turgut, C.(University of Aydin Menderes (Turkey). Faculty of Agriculture) | Mao, G.(The University of Tennesse Knoxville (USA))
The leaves of Capsicum annuum were inoculated with Phytophthora capsici 3 days after treatment with acibenzolar-S-methylbenzo [1,2,3]thiadiazole-7-carbothioic acid-S-methyl ester (ASM) and resistance to Phytophthora blight disease was investigated. P. capsici was significantly inhibited by ASM treatment by up to 45% in planta. The pepper plants responded to ASM treatments by rapid and transient induction of L-phenylalanine ammonia-lyase (PAL), increase in total phenol content and activities of chitinase and beta-1,3-glucanase. No significant increases in enzyme activities were observed in water-treated control plants compared with the ASM-treated plants. Therefore, it may by suggested that ASM induces defense-related enzymes, PAL activity, PR proteins and phenol accumulation in ASM-treated plants and contribute to enhance resistance against P. capsici.
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