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Comparative aggressiveness of Microdochium nivale and M-majus and evaluation of screening methods for Fusarium seedling blight resistance in wheat cultivars

文献类型： 外文期刊

作者： Ren, Runsheng 1 ; Yang, Xingping 2 ; Ray, Rumiana V. 1 ;

作者机构： 1.Univ Nottingham, Div Plant & Crop Sci, Sch Biosci, Loughborough LE12 5RD, Leics, England

2.Jiangsu Acad Agr Sci, Inst Vegetable Crops, Nanjing 210014, Jiangsu, Peoples R China

关键词： Fusarium seedling blight;Inoculation method;Aggressiveness;Microdochium spp;Cultivar resistance

期刊名称：EUROPEAN JOURNAL OF PLANT PATHOLOGY （ 影响因子：1.907； 五年影响因子：2.022 ）

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收录情况： SCI

摘要： Microdochium majus and M. nivale are the primary agents of Fusarium seedling blight (FSB) of wheat in wet and cool crop growing regions. The differential responses and plant traits (root and stem length) of eleven wheat cultivars were evaluated using three inoculation methods with M. majus or M. nivale in soil, potato dextrose agar plate or detached leaf assay to develop a reliable screening method for the identification of resistance to FSB caused by Microdochium species in wheat. Microdochium nivale was the more aggressive FSB pathogen causing 30 % higher disease severity than M. majus and impacting significantly on root length and stem length. In contrast, M. majus was more pathogenic than M. nivale on wheat leaves reducing significantly the maximum efficiency of photosystem (PS) II (Fv'/Fm'). Fv'/Fm' provides an estimate of the efficiency of PSII photochemistry (photosynthesis) at a given photosynthetically-active photon flux density defined as PSII operating efficiency if all PSII reaction centres were 'open'. Regression analysis suggested that reduction in stem and/or root length and Fv'/Fm' can be used as indicators of disease severity and for the detection of tolerance in wheat cultivars to specific diseases in the Fusarium complex. There were significant interactions between genotypes and species for the assessed disease and plant traits suggesting that resistance/tolerance mechanisms and genes maybe different to disease caused by individual Microdochium species. The most resistant cultivar to FSB identified consistently using all methods was Petrus, also known to be resistant to Fusarium head blight suggesting that this cultivar may possess useful durable resistance to more than one disease in the Fusarium disease complex.

  • 相关文献

[1]Identification of novel quantitative trait loci for resistance to Fusarium seedling blight caused by Microdochium majus and M. nivale in wheat. Ren, Runsheng,Yang, Xingping,Ren, Runsheng,Foulkes, John,Mayes, Sean,Ray, Rumiana V..

[2]Identification and Characterization of the Causal Agent of Gummy Stem Blight from Muskmelon and Watermelon in East China. Li, Ping-Fang,Ren, Run-Sheng,Yao, Xie-Feng,Xu, Jin-Hua,Yang, Xing-Ping,Babu, Binoy,Paret, Mathews L..

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