Aims The causal agent of Fusarium wilt in faba bean is Fusarium oxysporum f. sp. fabae (FOF), which significantly reduces the yield in continuous cropping systems. We aimed to evaluate the role of wheat in alleviating Fusarium wilt in faba bean. Methods We assessed the effect of wheat on the occurrence of Fusarium wilt in faba bean and analyzed the differences in the root exudates produced by faba bean in monocropping and intercropping systems before and after infection by FOF. Results Treatment with FOF increased the incidence and disease index of Fusarium wilt and significantly increased the number of rhizosphere pathogens. Phenolic acids, organic acids, amino acids and sugars exuded from the roots of faba bean increased by 39.1%, 329.0%, 921.7% and 1195.7%, respectively, while intercropping reduced them by 28.04%, 55.69%, 79.10% and 78.75%, respectively. The rhizosphere pathogens of faba bean decreased significantly following intercropping, and the incidence of Fusarium wilt dropped to tolerable levels. Conclusions This study suggests that the inoculation with FOF stimulated the exudation of phenolic acids, organic acids, amino acids and sugars from faba bean roots. These compounds were closely related to the changes in the disease resistance of faba bean and could also be used as nutrients to promote pathogen proliferation. After intercropping with wheat, the exudates of faba bean decreased significantly, which may imply that the faba bean recovered from stress, reduced the amount of nutrients needed for pathogen growth, limited the proliferation of pathogens and contributed to the alleviation of Fusarium wilt.

中文翻译：

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与小麦间作抑制蚕豆枯萎病并调节根系分泌物的组成

目的 蚕豆枯萎病的病原体是尖孢镰刀菌Fusarium oxysporum f。sp. fabae (FOF)，这会显着降低连作系统的产量。我们旨在评估小麦在减轻蚕豆枯萎病中的作用。方法评估小麦对蚕豆枯萎病发生的影响，分析单作和间作系统蚕豆根系分泌物在FOF感染前后的差异。结果FOF处理增加了枯萎病的发病率和发病指数，显着增加了根际病原菌的数量。蚕豆根部渗出的酚酸、有机酸、氨基酸和糖分分别增加了39.1%、329.0%、921.7%和1195.7%，而间作减少了28.04%、55.69%、79.10%和78.75%。分别。间作蚕豆根际病原菌显着减少，枯萎病发病率下降到可耐受水平。结论 本研究表明，FOF 的接种刺激了蚕豆根中酚酸、有机酸、氨基酸和糖的渗出。这些化合物与蚕豆抗病能力的变化密切相关，也可作为营养物质促进病原菌增殖。与小麦间作后，蚕豆分泌物显着减少，这可能意味着蚕豆从逆境中恢复，减少了病原菌生长所需的养分量，限制了病原菌的增殖，有助于缓解枯萎病。间作蚕豆根际病原菌显着减少，枯萎病发病率下降到可耐受水平。结论 本研究表明，FOF 的接种刺激了蚕豆根中酚酸、有机酸、氨基酸和糖的渗出。这些化合物与蚕豆抗病能力的变化密切相关，也可作为营养物质促进病原菌增殖。与小麦间作后，蚕豆分泌物显着减少，这可能意味着蚕豆从逆境中恢复，减少了病原菌生长所需的养分量，限制了病原菌的增殖，有助于缓解枯萎病。间作蚕豆根际病原菌显着减少，枯萎病发病率下降到可耐受水平。结论 本研究表明，FOF 的接种刺激了蚕豆根中酚酸、有机酸、氨基酸和糖的渗出。这些化合物与蚕豆抗病能力的变化密切相关，也可作为营养物质促进病原菌增殖。与小麦间作后，蚕豆分泌物显着减少，这可能意味着蚕豆从逆境中恢复，减少了病原菌生长所需的养分量，限制了病原菌的增殖，有助于缓解枯萎病。枯萎病的发生率下降到可以忍受的水平。结论 本研究表明，FOF 的接种刺激了蚕豆根中酚酸、有机酸、氨基酸和糖的渗出。这些化合物与蚕豆抗病能力的变化密切相关，也可作为营养物质促进病原菌增殖。与小麦间作后，蚕豆分泌物显着减少，这可能意味着蚕豆从逆境中恢复，减少了病原菌生长所需的养分量，限制了病原菌的增殖，有助于缓解枯萎病。枯萎病的发生率下降到可以忍受的水平。结论 本研究表明，FOF 的接种刺激了蚕豆根中酚酸、有机酸、氨基酸和糖的渗出。这些化合物与蚕豆抗病能力的变化密切相关，也可作为营养物质促进病原菌增殖。与小麦间作后，蚕豆分泌物显着减少，这可能意味着蚕豆从逆境中恢复，减少了病原菌生长所需的养分量，限制了病原菌的增殖，有助于缓解枯萎病。这些化合物与蚕豆抗病能力的变化密切相关，也可作为营养物质促进病原菌增殖。与小麦间作后，蚕豆分泌物显着减少，这可能意味着蚕豆从逆境中恢复，减少了病原菌生长所需的养分量，限制了病原菌的增殖，有助于缓解枯萎病。这些化合物与蚕豆抗病能力的变化密切相关，也可作为营养物质促进病原菌增殖。与小麦间作后，蚕豆分泌物显着减少，这可能意味着蚕豆从逆境中恢复，减少了病原菌生长所需的养分量，限制了病原菌的增殖，有助于缓解枯萎病。