Abstract: Plants can defend themselves against fungal infection by natural means inducedby biotic and abiotic elicitors. Osthol is a natural compound extracted from dried fruits ofCnidii Monnieri Fructus. In this study, it has been shown to not only be a fungicide withacceptable curative properties (control efficacy of 68.72), but it also showed a significantprophylactic effect (with control efficacy of 77.36) against pumpkin powdery mildew at aconcentration of 100 μg·mL-1. In pumpkin leaves with/or without inoculation ofSphaerotheca fuliginea, osthol treatment induced the accumulation of chitinase andperoxidase and enhanced the transcription of chitinase gene in non-inoculated leaves. Thepotentiation of phenylalanine amonia-lyase activity in leaves by osthol application andfollowing inoculation was absent in that with inoculation or osthol treatment, indicatingthat induced PAL in osthol-pretreated plants was inoculation-mediated. In conclusion, thisnatural compound could induce resistance response in the plant against powdery mildew.
Keywords: Osthol; coumarinic compound; induced resistance response; Cucurbita moschata; Sphaerotheca fuliginea; chitinase; POD; PAL
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Shi, Z.; Wang, F.; Zhou, W.; Zhang, P.; Fan, Y.J. Application of Osthol Induces a Resistance Response Against Powdery Mildew in Pumpkin Leave. Int. J. Mol. Sci. 2007, 8, 1001-1012.
Shi Z, Wang F, Zhou W, Zhang P, Fan YJ. Application of Osthol Induces a Resistance Response Against Powdery Mildew in Pumpkin Leave. International Journal of Molecular Sciences. 2007; 8(9):1001-1012.
Shi, Zhiqi; Wang, Fei; Zhou, Wei; Zhang, Peng; Fan, Yong J. 2007. "Application of Osthol Induces a Resistance Response Against Powdery Mildew in Pumpkin Leave." Int. J. Mol. Sci. 8, no. 9: 1001-1012.