The ability of endophytic fungi isolated from cucurbit plants to suppress soilborne diseases and the relationship between antagonism and disease suppression were studied. In dual culture tests of 1044 strains of 90 genera and three pathogenic fungi, 47.1 % of the endophytic fungal strains showed antagonistic effects on at least one pathogen; 186 strains against Rhizoctonia solani, 371 strains against Sclerotinia sclerotiorum, and 403 strains against Fusarium oxysporum f. sp. cucumerinum. The main antagonistic type of the strains of one genus generally was identical to one pathogen. In the pot experiment of cucumber inoculated with R. solani and endophytic fungi, 74.3 % and 33.3 % of 288 strains showed control efficacy of more than 50 % and more than 80 % on cucumber Rhizoctonia root rot respectively. These strains were mostly distributed in Fusarium, Chaetomium, Colletotrichum and Acrocalymma. There were some differences in the proportion of strains with better disease suppressive effects between strain sources. No significant correlation existed between the disease suppression of a strain in vivo and its antagonism against the pathogen in vitro. Most growth-promoting strains had good suppressive effects on cucumber Rhizoctonia root rot. In this study, 82 endophytic fungal strains had good disease suppressive effects and no obvious adverse effects on cucumber growth, and 35 of them showed obvious growth-promoting effects, which suggested that endophytic fungi from cucurbit plants have excellent potential for plant disease control.

研究了从葫芦科植物中分离出的内生真菌抑制土壤传播疾病的能力以及拮抗作用与疾病抑制之间的关系。在90属的1044株菌株和3种致病真菌的双重培养试验中，47.1％的内生真菌菌株对至少一种病原体表现出拮抗作用。抗茄枯萎菌186株，菌核菌371株，尖孢镰刀菌403株。sp。黄瓜。一个属的菌株的主要拮抗类型通常与一种病原体相同。在黄瓜的盆栽实验中，接种了R. solani和内生真菌，74.3％和288个菌株33.3％，表现出超过50％的防治效力和对黄瓜超过80％丝核菌分别腐根。这些菌株大多分布在镰刀菌，毛壳菌属，炭疽菌和顶伞菌中。在菌株来源之间，具有更好的疾病抑制效果的菌株比例存在一些差异。体内菌株的疾病抑制与其在体外对病原体的拮抗作用之间不存在显着相关性。大多数促生长的菌株对黄瓜良好的抑制作用纹枯病根腐。在本研究中，82株内生真菌菌株对黄瓜的生长具有良好的抑病作用，且无明显的不利影响，其中35株具有明显的促生作用，这表明葫芦科植物的内生真菌具有很好的防治植物病害的潜力。