Fusarium Head Blight is the most important disease of cereals worldwide. Studies of interactions between different flower/grain pathogenic Fusarium species have been carried out, using the host and tissue from which the fungus was isolated. The aim of the present study was to assess the root responses of Brachypodium distachyon genotypes to Fusarium spp. to provide information about differences in host resistance and/or fungal aggressiveness. A total of 10 isolates of four Fusarium species were selected: F. graminearum, F. pseudograminearum, F. cerealis, and F. poae. A total of seven genotypes of B. distachyon were used: Afghanistan, Iran, Israel, Pakistan, South Africa, Uruguay and Bd genotype 21. Roots were inoculated and the necrosis root length was measured at 2, 4, 6, and 8 days post-inoculation. The results showed that F. graminearum and F. pseudograminearum were the species with the highest AUDPC values followed by F. cerealis that showed an intermediate value of AUDPC. F. poae was the least aggressive species. Regarding Brachypodium, the least affected genotype was Bd 21 and Pakistan, while the remaining genotypes showed differences in susceptibility. To our knowledge, this is the first report showing interaction between F. pseudograminearum, F. cerealis and F. poae with Brachypodium roots. Moreover, variability in susceptibility among Brachypodium genotypes and in Fusarium species aggressiveness was reported. We concluded that B. distachyon roots offer an efficient tissue system model to evaluate interaction with Fusarium spp.

枯萎病是世界范围内最重要的谷物疾病。已经使用分离真菌的宿主和组织进行了不同花/谷粒致病性镰刀菌种之间相互作用的研究。本研究的目的是评估短枝曲霉基因型对镰刀菌的根响应。提供有关宿主抗性和/或真菌侵袭性差异的信息。总共选择了四种镰刀菌属的10种分离株：禾本科镰刀菌，假镰刀菌，谷类镰刀菌和po。poae。共有7个B. distachyon基因型分别使用：阿富汗，伊朗，以色列，巴基斯坦，南非，乌拉圭和Bd基因型21。接种根，并在接种后第2、4、6和8天测量坏死根的长度。结果表明，禾谷镰刀菌和F. pseudograminearum是具有最高值AUDPC其次是物种F.禾谷该显示AUDPC的中间值。F. poae是侵略性最低的物种。关于短足动物，受影响最小的基因型是Bd 21和巴基斯坦，而其余基因型在药敏性上存在差异。据我们所知，这是展示交流的第一报告F. pseudograminearum，F.禾谷和F. poae带有Brachypodium根。此外，据报道，短孢子虫基因型之间的易感性以及镰刀菌属物种的侵略性也有差异。我们得出的结论是，B。distachyon根提供了一种有效的组织系统模型来评估与镰刀菌的相互作用。