Different Tolerance in Bread Wheat, Durum Wheat and Barley to Fusarium Crown Rot Disease Caused by Fusarium pseudograminearum
文献类型: 外文期刊
作者: Liu, Yaxi 1 ; Ma, Jun 2 ; Yan, Wei 2 ; Yan, Guijun 3 ; Zhou, Meixue 5 ; Wei, Yuming 1 ; Zheng, Youliang 1 ; Liu, Chunji 2 ;
作者机构: 1.Sichuan Agr Univ, Triticeae Res Inst, Yaan 625014, Peoples R China
2.CSIRO Plant Ind, St Lucia, Qld 4067, Australia
3.Univ Western Australia, Sch Plant Biol, Perth, WA 6009, Australia
4.Jiangsu Acad Agr Sci, Food Crop Inst, Nanjing 210014, Jiangsu, Peoples R China
5.Univ Tasmania, Tasmanian Inst Agr Res, Kings Meadows, Tas 7250, Australia
6.Univ Tasmania, Sch Agr Sci, Kings Meadows, Tas 7250, Australia
关键词: Fusarium crown rot;wheat;barley;real-time quantitative PCR;fungal biomass
期刊名称:JOURNAL OF PHYTOPATHOLOGY ( 影响因子:1.789; 五年影响因子:1.574 )
ISSN: 0931-1785
年卷期: 2012 年 160 卷 7-8 期
页码:
收录情况: SCI
摘要: Fusarium crown rot (FCR) is a major disease of wheat and barley, and stem-base browning has been routinely used to measure resistance. Compared with barley (Hordeum vulgare L.), bread wheat (Triticum aestivum L.) shows less severe FCR stem-base browning symptoms (indicative of greater resistance or tolerance) but suffers higher yield loss (indicative of greater susceptibility), whereas durum wheat (T. durum Desf.) shows similar FCR severity but suffers much worse yield loss. To understand these differences, fungal biomass in bread and durum wheats and barley was estimated by real-time quantitative PCR at different stages of FCR disease development. Similar to a previous report on bread wheat infection by Fusarium graminearum, FCR infection caused by Fusarium pseudograminearum also showed three distinct phases in each of the three crop species analysed. During all stages of FCR disease development, barley varieties invariably displayed earlier and faster fungal accumulation compared with either bread or durum wheat. Although suffering much greater yield loss than barley, durum wheat appears to accumulate significantly lower levels of F. pseodugraminearum during infection. These results demonstrate that bread wheat varieties are more resistant to FCR infection and pathogen accumulation than barley varieties, and the less yield loss of the latter is likely due to its better tolerance to this disease. If also existing among different sources of resistance within a given species, these different features of disease resistance and tolerance could be exploited to minimize yield loss of new varieties.
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