Zhan Fangfang, Xie Yiekun, Zhu Wen, Sun Danli, McDonald Bruce A, Zhan Jiasui
First, second, third, and fourth authors: Fujian Key Lab of Plant Virology, Institute of Plant Virology, Fujian Agriculture and Forestry University, Fuzhou, 350002, China; fifth author: Plant Pathology Group, Institute of Integrative Biology, ETH Zurich, LFW, Zurich, CH-8092, Switzerland; and sixth author: Key Lab for Biopesticide and Chemical Biology, Ministry of Education, Fujian Agriculture and Forestry University, Fuzhou.
Phytopathology. 2016 Nov;106(11):1255-1261. doi: 10.1094/PHYTO-12-15-0338-R. Epub 2016 Aug 18.
Zymoseptoria tritici is a globally distributed plant-pathogenic fungus causing Septoria tritici blotch of wheat. In this study, the in vitro growth rates and aggressiveness of 141 genetically distinct isolates sampled from four wheat fields on three continents were assessed to determine the association of these two ecological parameters. Aggressiveness was assessed on two spring wheat cultivars ('Toronit' and 'Greina') in a greenhouse using percentages of leaf area covered by lesions and pycnidia. We found a positive correlation between aggressiveness of pathogen strains on the two cultivars, consistent with a quantitative and host-nonspecific interaction in this pathosystem. We also found a positive correlation between aggressiveness and average growth rate at two temperatures, suggesting that in vitro pathogen growth rate may make a significant contribution to pathogen aggressiveness.
小麦黄斑叶枯病菌是一种全球分布的植物病原真菌，可引起小麦黄斑叶枯病。在本研究中，对从三大洲四个麦田采集的141个遗传上不同的分离株的体外生长速率和致病力进行了评估，以确定这两个生态参数之间的关联。在温室中，使用病斑和分生孢子器覆盖的叶面积百分比，对两个春小麦品种（“Toronit”和“Greina”）的致病力进行了评估。我们发现病原菌菌株在两个品种上的致病力之间存在正相关，这与该病害系统中的定量和寄主非特异性相互作用一致。我们还发现致病力与两个温度下的平均生长速率之间存在正相关，这表明体外病原菌生长速率可能对病原菌致病力有显著贡献。
