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Trichoderma species show biocontrol potential against Ceratocystis wilt in mango plants
European Journal of Plant Pathology ( IF 1.8 ) Pub Date : 2020-08-13 , DOI: 10.1007/s10658-020-02095-6
R. A. S. Brito , G. P. Cavalcante , V. M. Stock , A. A. Colman , D. P. dos Santos , R. A. Sermarini , L. A. Maffia

Ceratocystis wilt, caused by Ceratocystis fimbriata, is an important disease that causes the decline and death of mango trees. Root infection by soil inoculum is common, and in such cases, the use of resistant plants is recommended. Because many commonly used cultivars are susceptible to the pathogen, an alternative method to manage the disease is needed, such as the use of Trichoderma spp. as a biological control agent. This study evaluated the potential of Trichoderma spp. to control C. fimbriata in the soil. Eight strains of Trichoderma were isolated from the rhizosphere of mango trees. Three known species were identified: Trichoderma harzianum (TF10 and TF12), Trichoderma longibrachiatum (TF1, TF2, TF5, and TF7) and Trichoderma asperelloides (TF4 and TF6). All eight strains inhibited C. fimbriata in dual culture assays. Trichoderma harzianum and T. asperelloides produced thermostable soluble metabolites that inhibited 100% of the pathogen’s mycelial growth while for T. longibrachiatum the inhibition ranged between 44 to 65%. These eight strains were also tested under greenhouse conditions. Trichoderma asperelloides strain TF6 reduced the incidence of the disease in the roots by 88%; TF12 by 52%, TF2, TF4, and TF7 by 40%; and TF1 by only 31%. This is the first report on the antagonistic potential of Trichoderma spp. against C. fimbriata in mango plants. Biocontrol using species of Trichoderma could be a sustainable, economically, and viable alternative for the management of Ceratocystis wilt.



中文翻译:

木霉菌种对芒果植物中的角藻枯萎病具有生物防治潜力

毛囊孢子虫引起的毛囊孢子枯萎是引起芒果树衰亡的重要疾病。土壤接种物的根系感染很常见,在这种情况下,建议使用抗性植物。由于许多常用品种对病原体敏感,因此需要一种替代方法来控制疾病,例如使用木霉属。作为生物防治剂。这项研究评估了木霉属菌的潜力。来控制土壤中的纤毛衣藻。从芒果树的根际中分离出八株木霉。确定了三个已知物种:哈茨木霉(TF10和TF12),长木霉菌(TF1,TF2,TF5和TF7)和木霉曲霉(TF4和TF6)。在双重培养测定中,所有八种菌株均抑制纤毛衣原体哈茨木霉阿斯雷德氏木霉产生热稳定的可溶性代谢产物,可抑制病原体菌丝体生长的100%,而木霉的抑制作用介于44%至65%之间。还在温室条件下测试了这八种菌株。Asperelloides木霉菌株TF6将根部疾病的发生率降低了88%;TF12增加52%,TF2,TF4和TF7增加40%;而TF1仅降低31%。这是关于木霉菌具有拮抗潜力的第一份报告spp。反对芒果植物中的纤毛衣藻。使用木霉属物种进行生物防治可能是一种可持续的,经济的,可行的替代方法,用于治疗青枯病。

更新日期:2020-08-14
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