中国农业科学 ›› 2025, Vol. 58 ›› Issue (11): 2162-2175.doi: 10.3864/j.issn.0578-1752.2025.11.007

• 植物保护 • 上一篇    下一篇

链霉菌TOR3209及其挥发性有机化合物提高烟草抗木贼镰孢的能力

赵琳琳1,2(), 贺羽茜1(), 彭杰丽1, 王旭1, 马佳1, 张秀敏2(), 胡栋1()   

  1. 1 河北省农林科学院农业资源环境研究所/河北省土壤培肥与农业绿色发展重点实验室,石家庄 050051
    2 河北大学生命科学学院,河北保定 071000
  • 收稿日期:2025-03-12 接受日期:2025-04-21 出版日期:2025-06-01 发布日期:2025-06-09
  • 通信作者:
    胡栋,E-mail:
    张秀敏,E-mail:
  • 联系方式: 赵琳琳,E-mail:2454502688@qq.com。贺羽茜,E-mail:heyuxi950427@163.com。赵琳琳和贺羽茜为同等贡献作者。
  • 基金资助:
    国家重点研发计划(2021YFD1901004-4); 河北省农林科学院科技创新专项(2022KJCXZX-ZHS-3); 河北省湿地保护与绿色发展协同创新中心开放基金(2023hbxczx2-7)

Streptomyces TOR3209 and Its Volatile Organic Compounds Enhance Tobacco Resistance to Fusarium equiseti

ZHAO LinLin1,2(), HE YuXi1(), PENG JieLi1, WANG Xu1, MA Jia1, ZHANG XiuMin2(), HU Dong1()   

  1. 1 Institute of Agro-Resources and Environment, Hebei Academy of Agriculture and Forestry Sciences/Hebei Key Laboratory of Soil Fertility Improvement and Agricultural Green Development, Shijiazhuang 050051
    2 College of Life Sciences, Hebei University, Baoding 071000, Hebei
  • Received:2025-03-12 Accepted:2025-04-21 Published:2025-06-01 Online:2025-06-09

摘要:

【目的】 探究链霉菌TOR3209及其挥发性有机化合物(volatile organic compounds,VOCs)对烟草抗病能力的影响,阐明该菌株及其VOCs提高烟草抗病能力的直接和间接作用,为TOR3209及其VOCs的生防应用提供理论依据。【方法】 选择链霉菌TOR3209和木贼镰孢(Fusarium equiseti)作为研究材料,采用平板对峙法和生长速率法评价TOR3209及其VOCs抑制木贼镰孢的能力;通过对烟草接种不同浓度的TOR3209菌悬液(1.0×101、1.0×103、1.0×105、1.0×107 CFU/mL)以及与TOR3209产生的VOCs共培养,测试该菌株及其VOCs对烟草抗木贼镰孢能力的影响;对烟草进行转录组测序,分析差异基因表达情况;利用固相微萃取(SPME)方法对TOR3209产生的VOCs进行鉴定,选择特异性强的化合物(十七烷)基于烟草做抗木贼镰孢验证,以添加不同质量浓度(1 mol·kg-1、1 mmol·kg-1、1 μmol·kg-1、0.001 μmol·kg-1)的十七烷为处理组,验证其对烟草的影响。【结果】 链霉菌TOR3209菌株及其VOCs均能对木贼镰孢产生拮抗作用,抑制率分别为56.9%、60.0%;与对照相比,不同浓度TOR3209菌悬液处理的烟草病害严重程度均显著降低(P<0.01),其中浓度为1.0×101 CFU/mL的处理抗病效果最好;保留菌株处理组与移除菌株处理组均可以提高烟草的抗病能力,防治效果分别为85.7%、72.5%;在TOR3209的VOCs发挥作用过程中以诱导烟草的系统抗性为主要途径;烟草转录组分析发现TOR3209的VOCs诱导烟草多个基因表达上调,其中多个基因均与植物抗病能力的提高相关;在TOR3209产生的VOCs中鉴定出多种化合物,其中十七烷在与烟草共培养后可以提高烟草抗木贼镰孢侵染的能力,1 mmol·kg-1处理组的效果显著。【结论】 链霉菌TOR3209及其VOCs主要通过诱导烟草的系统抗性来提高其抗病能力,且TOR3209的VOCs可以调控烟草的基因表达。

关键词: 链霉菌TOR3209, 烟草, 木贼镰孢, 抗病, 拮抗, 生物防治

Abstract:

ObjectiveThe objective of this study is to explore the effect of Streptomyces TOR3209 and its volatile organic compounds (VOCs) on tobacco disease resistance, clarify the direct and indirect mechanism of the strain and its VOCs to improve tobacco disease resistance, and to provide a theoretical basis for the biocontrol application of TOR3209 and its VOCs.【Method】Streptomyces TOR3209 and Fusarium equiseti were selected as research materials, and the inhibition ability of TOR3209 and its VOCs against F. equiseti was evaluated by using plate confrontation method and growth rate method. Tobacco was inoculated with different concentrations of TOR3209 suspension (1.0×101, 1.0×103, 1.0×105, 1.0×107 CFU/mL) and co-cultured with VOCs produced by TOR3209. The effects of the strain and its VOCs on tobacco resistance to F. equiseti were tested. The transcriptome sequencing of tobacco was performed to analyze the differential gene expression. Solid phase microextraction (SPME) method was used to identify the VOCs produced by TOR3209, and a compound with strong specificity (heptadecane) was selected to verify the resistance of tobacco to F. equisetaria. Different concentrations of heptadecane (1 mol·kg-1, 1 mmol·kg-1, 1 μmol·kg-1, 0.001 μmol·kg-1) were added as treatment groups to verify the effect of heptadecane on tobacco.【Result】Streptomyces TOR3209 and its VOCs had antagonistic effects on F. equiseti, with inhibition rates of 56.9% and 60.0%, respectively. Compared with the control, the severity of tobacco disease was significantly reduced under different concentrations of TOR3209 suspension (P<0.01), and the treatment with the concentration of 1.0×101 CFU/mL had the best disease resistance effect. Both the retained strain treatment group and the removed strain treatment group could improve the disease resistance of tobacco, the control effect was 85.7% and 72.5%, respectively. The main way was to induce tobacco systemic resistance during the action of TOR3209 VOCs. Transcriptome analysis of tobacco showed that the VOCs of TOR3209 induced up-regulation of several genes in tobacco, and many of the genes were related to the improvement of plant disease resistance. Among the VOCs produced by TOR3209, several compounds were identified, among which heptadecane could improve the resistance of tobacco to F. equiseti infection after co-culture with tobacco, and the treatment group with a mass concentration of 1 mmol·kg-1 had a significant effect.【Conclusion】Streptomyces TOR3209 and its VOCs mainly improve the resistance of tobacco by inducing systemic resistance, and the VOCs of TOR3209 can regulate the gene expression of tobacco.

Key words: Streptomyces TOR3209, tobacco, Fusarium equiseti, disease resistance, antagonism, biological control