-
白及(Bletilla striata)属兰科白及属植物,药用价值较高[1]。具有抗菌、促进伤口愈合、抗肿瘤、止血、抗溃疡、抗氧化、抗病毒等作用[2]。白及主要分布于我国的安徽、湖北、贵州、广西、四川、云南等省,除我国之外,白及在全球分布较少,仅种植于朝鲜半岛、日本、缅甸等[3-4]。由于白及的药用价值较高,白及的人工培养逐渐普及。但人工种植环境单一导致白及的病害大量发生,湿度过高利于病原菌繁殖,并通过昆虫、空气等加以传播[5]。常见的病害有黑斑病、根腐病及叶斑病等,已报道的病害中,腐皮镰刀菌(Fusarium fujikuroi)[6]、禾谷镰刀菌(Fusarium asiaticum)[7]会引发白及叶斑病,腐皮镰刀菌(Fusarium fujikuroi)[8]也可引起白及黑斑病,尖孢镰刀菌(Fusarium oxysporum)[9]可引起白及根腐病,灰葡萄孢霉(Botrytis cinerea) [10]可引起白及叶斑灰霉病。目前对于四川白及叶枯病少有人报道,因此研究从四川白及叶枯病植株上分离纯化病原菌,并依据形态学与分子生物学对菌株进行鉴定,并对病原菌进行回接试验,从而为白及的生物防治提供理论参考。
Isolation, Identification and Pathogenicity of Pathogens of Bletilla Striata Leaf Blight
doi: 10.12172/202311140002
- Received Date: 2023-11-14
- Available Online: 2024-03-04
-
Key words:
- Bletilla Striata /
- leaf blight /
- pathogen identification /
- pathogenicity
Abstract: In order to clarify the pathogenic bacteria species of leaf blight of Bletilla Striata, the pathogen was isolated and purified, and its species were identified by rDNA-ITS sequence analysis, the purified pathogen was grafted to the plant and evaluated its pathogenicity. The results showed that a total of 6 fungi strains were isolated from the B. striata sample. Among them were three Fusarium strains, included F. keratoplasticum, F. oxysporum and F. equiseti. A strain of Aspergillus japonicus; A strain of Botrytis cinerea; A strain of Mucor fragilis. According to the pathogenicity test, it was found that the above 6 strains of fungi were all pathogenic.