防风枯萎病拮抗真菌的筛选鉴定及防效评价  

Screening, identification and biological control effect of antagonistic fungus against fusarium wilt of Saposhnikovia divaricata

作　　者：王妍[1] 张福军 孙卓[1] 马锋敏 韩忠明[1] 赵淑杰[1] 王云贺[1] 韩梅[1] 杨利民[1] WANG Yan;ZHANG Fujun;SUN Zhuo;MA Fengmin;HAN Zhongming;ZHAO Shujie;WANG Yunhe;HAN Mei;YANG Limin(College of Chinese Medicinal Materials,Jilin Agricultural University/Cultivation Base of Provincial Joint Construction of the State Key Laboratory for Ecological Restoration and Ecosystem Management,Changchun 130118,China;Forestry Working Station of Taiwang Town in Ji’an,Ji’an 134200,China;Chagan Lake National Nature Reserve Administration in Jilin,Songyuan 131111,China)

机构地区：[1]吉林农业大学中药材学院/省部共建生态恢复和生态系统管理国家重点实验室培育基地,吉林长春130118 [2]集安市太王镇林业工作站,吉林集安134200 [3]吉林查干湖国家级自然保护区管理局,吉林松原131111

出　　处：《华南农业大学学报》2023年第2期263-269,共7页Journal of South China Agricultural University

基　　金：国家重点研发计划(2019YFC1710700,2019YFC1710702);吉林省科技发展计划(20200404010YY,20210204011YY,20200402104NC);中央财政林业科技推广示范项目(JLT2020-22,JLT2021-03);国家现代农业产业技术体系建设专项(CARS-21)。

摘　　要：【目的】从防风根际土中分离筛选出对防风枯萎病具有较强防治效果的生防真菌。【方法】采用对峙培养法从根际土壤中筛选出1株可拮抗尖孢镰刀菌的真菌菌株MR-97,并测定其抑菌谱;根据真菌菌落特征、显微特征,结合ITS序列分析等方法对拮抗菌株进行鉴定;通过显微观察MR-97对尖孢镰刀菌菌丝生长的影响;采用抗生素标记法测定拮抗菌株在土壤中的定殖能力;进行田间盆栽试验,检验MR-97对防风枯萎病的防治效果。【结果】本研究筛选出1株对尖孢镰刀菌抑菌效果为64.44%的拮抗菌株MR-97,其对木贼镰刀菌、灰葡萄孢等8种常见病原菌具有较强的抑菌效果,经鉴定菌株MR-97为土曲霉Aspergillus terreus。MR-97与尖孢镰刀菌对峙培养可使病原菌菌丝产生膨大、畸形、菌丝破损、内含物凝集等现象;在土壤中具有良好的定殖效果,土壤含菌量最高为9.8×106CFU/g。盆栽试验中,MR-97对防风枯萎病防效为67.86%,防治效果较好。【结论】土曲霉MR-97可有效抑制尖孢镰刀菌等多种病原菌菌丝生长,可在土壤中较快定殖并发挥生防效力。作为优质的生防菌源,MR-97具有一定的开发应用潜力。【Objective】The present study aimed to screen and isolate the antagonistic fungal strains with strong control effect against fusarium wilt from rhizosphere soil of Saposhnikovia divaricata.【Method】The strain MR-97, which was antagonistic to Fusarium oxysporum, was isolated from the rhizosphere soil of S.divaricata by confrontation culture method, and its bacteriostatic spectrum was determined. The strain was identified by fungal colony characteristics, microscopic characteristics and ITS sequence analysis. The effect of strain MR-97 on hyphae growth of pathogenic fungus were recorded by microscopic examination. The colonization ability of strain MR-97 in the soil was evaluated by antibiotic marker method. The control effect of strain MR-97 on fusarium wilt of S. divaricata were evaluated by pot experiment in the field. 【Result】The antagonistic strain MR-97 was screened with antibacterial rate of 64.44% against F. oxysporum. It also had strong antibacterial effect against eight common pathogens including F. equiseti and Botrytis cinerea, etc. The strain MR-97 was identified as Aspergillus terreus. The hyphal of pathogen enlargement, malformation, damage and agglutinated with inclusions, etc. when the strain MR-97 and F. oxysporum were cultured in confrontation. It had a good colonization effect in the soil, and the highest content of soil bacteria was 9.8×10~6 CFU/g. The biocontrol effect of MR-97 on fusarium wilt of S. divaricata was 67.86% in pot experiment, which had good control efficiency. 【Conclusion】Aspergillus terrestris MR-97 can effectively inhibit the mycelia growth of F.oxysporum and other pathogens, can colonize quickly in soil and has strong biocontrol effect. MR-97 strain, as a good source of biocontrol bacteria, has certain potentials of development and utilization.

关 键 词：防风 土曲霉 尖孢镰刀菌 生物防治 促生作用 

分 类 号：R282.2[医药卫生—中药学] S432.1[医药卫生—中医学]