AN Yifan,YANG Zhao,LIN Bo,et al.Isolation and Identification of Fungi from Black Shank Tobacco Plant and Comparison of Bacillus Antagonism[J].HEILONGJIANG AGRICULTURAL SCIENCES,2023,(06):45-49.[doi:10.11942/j.issn1002-2767.2023.06.0045]
黑胫病烟株真菌分离鉴定与芽孢杆菌拮抗比较
- Title:
- Isolation and Identification of Fungi from Black Shank Tobacco Plant and Comparison of Bacillus Antagonism
- 文章编号:
- 9
- 关键词:
- 烟草黑胫病; 马利亚霉属紫窝尺蛾菌; 芽孢杆菌; 拮抗试验
- 文献标志码:
- A
- 摘要:
- 针对连作烟田土传病害发病率高,尤其是黑胫病烟株残体遗留大田,致次年病害发生的情况,为了探明烟株残体所含真菌,以及在生物防治背景下生防芽孢杆菌对真菌的拮抗效果,对黑胫病烟株茎秆样本进行了髓部残片真菌分离培养,从形态学和系统学对真菌进行了鉴定,并使用4株生防芽孢杆菌与真菌进行了拮抗比较。真菌菌丝体无色透明,可见厚垣孢子,18S rDNA序列与Mariannaea punicea CBS 239.56同源,鉴定为马利亚霉属紫窝尺蛾菌。贝莱斯芽孢杆菌RJW-5-5、枯草芽孢杆菌1号、解淀粉芽孢杆菌YF-6和甲基营养型芽孢杆菌LW-6这4株生防芽孢杆菌对Mariannaea punicea的拮抗抑制率分别为24.12%、21.51%、1799%和16.81%;拮抗占位空间具体表现为贝莱斯芽孢杆菌RJW-5-5(56.58 mm)>甲基营养型芽孢杆菌LW-6(56.08 mm)>枯草芽孢杆菌1号(53.50 mm) >解淀粉芽孢杆菌YF-6 (52.45 mm)。4株生防芽孢杆菌对马利亚霉属紫窝尺蛾菌(Mariannaea punicea)均有较好的拮抗效果,综合评价贝莱斯芽孢杆菌RJW-5-5最优,具有作为防治烟草黑胫病生防菌的潜力。
- Abstract:
- In view of the high incidence rate of soil-borne diseases in continuous cropping tobacco fields, especially the occurrence of diseases in the next year caused by black shank tobacco plant residues left in the field, the research aims to identify the fungi contained and conclude the antagonistic effects of four Bacillus strains in the context of biological control. A fungus was isolated from black shank tobacco plant, described morphologically and identified with a phylogenetic tree. The fungal mycelium was colorless and transparent with visible chlamydospores. Its 18S rDNA sequence is homologous to Mariannaea punicea CBS 239.56. Four biocontrol Bacillus strains, namely Bacillus velezensis RJW-5-5, Bacillus subtilis 1, Bacillus amyloliquefaciens YF-6, and Bacillus methylotrophicus LW-6 showed good antagonistic effects against Mariannaea punicea with inhibition rates of 24.12%, 21.51%, 17.99% and 16.81% respectively; The specific manifestation of antagonistic occupying spaces were as follows: Bacillus velezensis RJW-5-5 (56.58 mm) >Bacillus methylotrophicus LW-6 (56.08 mm) >Bacillus subtilis 1 (53.50 mm) >Bacillus amyloliquefaciens YF-6 (52.45 mm). The Bacillus velezensis RJW-5-5 performed best indicating a potential for tobacco black shank control.
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备注/Memo
收稿日期:2023-03-16