Izquierdo-García Luisa Fernanda, Carmona-Gutiérrez Sandra Lorena, Moreno-Velandia Carlos Andrés, Villarreal-Navarrete Andrea Del Pilar, Burbano-David Diana Marcela, Quiroga-Mateus Ruth Yesenia, Gómez-Marroquín Magda Rocío, Rodríguez-Yzquierdo Gustavo Adolfo, Betancourt-Vásquez Mónica
Corporación Colombiana de Investigación Agropecuaria, AGROSAVIA, Centro de Investigación Tibaitatá, Km 14 vía Bogotá a Mosquera, Mosquera, Cundinamarca 250047, Colombia.
J Fungi (Basel). 2024 Jun 12;10(6):419. doi: 10.3390/jof10060419.
Fusarium wilt of banana (FWB) is the most limiting disease in this crop. The phytosanitary emergency caused by FWB since 2019 in Colombia has required the development of ecofriendly control methods. The aim of this study was to test the effectiveness of microbial-based biofungicides against FWB caused by f. sp. race 1 (Foc R1) and correlate such effect with plant physiological parameters. Five (T1 to T4 and T9) and four (T5 to T8)-based biofungicides were evaluated in pot experiments. In vitro, dual confrontation tests were also carried out to test whether the in vitro effects on Foc growth were consistent with the in vivo effects. While -based T3, T4, and T9, and -based T8, significantly reduced the growth of Foc R1 in vitro, -based T1, T3, T4, and T9 temporarily reduced the Foc population in the soil. However, the incidence progress of FWB was significantly reduced by Bacterial-based T7 (74% efficacy) and -based T2 (50% efficacy). The molecular analysis showed that T7 prevented the inner tissue colonization by Foc R1 in 80% of inoculated plants. The T2, T4, T7, and T9 treatments mitigated the negative effects caused by Foc R1 on plant physiology and growth. Our data allowed us to identify three promising treatments to control FWB, reducing the progress of the disease, delaying the colonization of inner tissue, and mitigating physiological damages. Further studies should be addressed to determine the modes of action of the biocontrol agents against Foc and validate the utilization in the field.
香蕉枯萎病(FWB)是这种作物最具限制性的病害。自2019年以来,哥伦比亚由香蕉枯萎病引起的植物检疫紧急情况要求开发生态友好型防治方法。本研究的目的是测试基于微生物的生物杀菌剂对尖孢镰刀菌古巴专化型1号生理小种(Foc R1)引起的香蕉枯萎病的有效性,并将这种效果与植物生理参数相关联。在盆栽试验中评估了五种(T1至T4和T9)和四种(T5至T8)基于微生物的生物杀菌剂。在体外,还进行了双对峙试验,以测试对Foc生长的体外影响是否与体内影响一致。虽然基于微生物的T3、T4和T9以及基于微生物的T8在体外显著降低了Foc R1的生长,但基于微生物的T1、T3、T4和T9暂时减少了土壤中Foc的数量。然而,基于细菌的T7(74%的防效)和基于微生物的T2(50%的防效)显著降低了香蕉枯萎病的发病进程。分子分析表明,T7在80%的接种植物中阻止了Foc R1对内组织的定殖。T2、T4、T7和T9处理减轻了Foc R1对植物生理和生长造成的负面影响。我们的数据使我们能够确定三种有前景的防治香蕉枯萎病的处理方法,即减少病害进程、延迟内组织定殖并减轻生理损害。应开展进一步研究以确定生物防治剂对Foc的作用方式,并验证其在田间的应用。