Progression of Deoxynivalenol Concentrations in Spikes and Kernels of Winter Wheat Cultivars after Inoculation with Fusarium culmorum

Jana Chrpová, Václav Šíp, Eva Matějová and Světlana Sýkorová
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Jana Chrpová: Research Institute of Crop Production, Prague-Ruzyně, Czech Republic
Václav Šíp: Research Institute of Crop Production, Prague-Ruzyně, Czech Republic
Eva Matějová: Research Institute of Crop Production, Prague-Ruzyně, Czech Republic
Světlana Sýkorová: Research Institute of Crop Production, Prague-Ruzyně, Czech Republic

Czech Journal of Genetics and Plant Breeding, 2006, vol. 42, issue 4, 137-141

Abstract: Progression of deoxynivalenol (DON) concentrations in spikes and kernels was studied in relation to Fusarium head blight (FHB) symptoms in five winter wheat cultivars, differing in resistance to FHB, after single floret inoculation with an aggressive isolate of Fusarium culmorum. After inoculation in field conditions the spikes were detached from the plant and kept in the greenhouse under controlled conditions. High concentrations of DON were detected in susceptible cultivars at an early stage of pathogenesis (7 days after inoculation). Over the whole examined 21-day period and also at maturity spikes contained more DON than kernels. While differences between cultivars in the accumulation of DON were highly expressed already 7 days after inoculation, differences in symptomatic reactions were not clear until day 21. Owing to the reported crucial role of DON at early stages of pathogenesis, the importance of appropriate timing of fungicide application is highly stressed.

Keywords: Fusarium head blight; symptoms; accumulation of deoxynivalenol; resistance; winter wheat (search for similar items in EconPapers)
Date: 2006
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Persistent link: https://EconPapers.repec.org/RePEc:caa:jnlcjg:v:42:y:2006:i:4:id:3644-cjgpb

DOI: 10.17221/3644-CJGPB

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