中文摘要：本文研究了在受控条件下禾谷镰刀菌（Fusarium graminearum）和黄色镰刀菌（F.canmorumum）原发感染麦穗的部位对赤霉病（FHB）的影响。研究证实了FHB是一种原发感染麦穗部位的功能。热成像技术有助于区分感染情况，可用于FHB抗性育种。
外文摘要：The effect of the primary infection site by Fusarium graminearum and F. culmorum within wheat ears on Fusarium head blight (FHB) was investigated under controlled conditions. FHB development was assessed visually and thermographically following inoculation by: (i) spraying ears, or injecting inoculum into spikelets on (ii) tip, (iii) centre and (iv) base of the ears, separately. Fusarium infection significantly increased the temperature span within ears 6 days post inoculation (dpi), especially infections starting at the ear tip. The temperature difference between air and ear was negatively correlated to FHB severity and enabled disease detection even 29 dpi. F. culmorum caused significant higher disease severity neither reflected in the frequency of infected kernels nor in thousand kernel weight (TKW). Spray inoculations had the strongest effect on TKW, whereas tip inoculations had no effect. Centre and base inoculations had intermediate effects on TKW, although FHB levels did not differ with the same trend among inoculation scenarios. The overall low correlations among FHB severity, infected kernels and TKW are explained by the pathogen spread within ears – downwards more than upwards – and the effect on yield formation which is lower for infections of the upper parts of ears. An exponential model showed high goodness of fit for gradients of infected kernels within ears (R2 ≥ 70) except tip infection with F. culmorum. This study confirmed that FHB is a function of the primary infection site within ears. Thermography was useful to differentiate among infection scenarios and may be applied in breeding for FHB resistance.
外文关键词：Wheat；Fusarium head blight；Fusarium graminearum；Fusarium culmorum；Thermography
作者：Al Masri,A； Hau, B； Dehne, HW； Mahlein, AK； Oerke, EC
作者单位：Rhein Friedrich Wilhelms Univ Bonn
期刊名称：EUROPEAN JOURNAL OF PLANT PATHOLOGY
期刊影响因子：1.494
出版年份：2017
出版刊次：4
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