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Application of Osthol Induces a Resistance Response Against Powdery Mildew in Pumpkin Leaves

ABSTRACT: Plants can defend themselves against fungal infection by natural means induced by biotic and abiotic elicitors. Osthol is a natural compound extracted from dried fruits of Cnidii Monnieri Fructus. In this study, it has been shown to not only be a fungicide with acceptable curative properties (control efficacy of 68.72), but it also showed a significant prophylactic effect (with control efficacy of 77.36) against pumpkin powdery mildew at a concentration of 100 ?g·mL?1. In pumpkin leaves with/or without inoculation of Sphaerotheca fuliginea, osthol treatment induced the accumulation of chitinase and peroxidase and enhanced the transcription of chitinase gene in non-inoculated leaves. The potentiation of phenylalanine amonia-lyase activity in leaves by osthol application and following inoculation was absent in that with inoculation or osthol treatment, indicating that induced PAL in osthol-pretreated plants was inoculation-mediated. In conclusion, this natural compound could induce resistance response in the plant against powdery mildew.


PROVIDER: S-EPMC3871898 | BioStudies | 2007-01-01

REPOSITORIES: biostudies

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