{"title":"利用拮抗菌防治由 Alternaria tenuissima 引起的马铃薯褐叶斑病以及病害发展过程中植物相关的生化变化","authors":"Ebrahim Salari, Sareh Baghaee-Ravari","doi":"10.1007/s11540-024-09693-5","DOIUrl":null,"url":null,"abstract":"<p>The incidence of brown leaf spot, attributed to <i>Alternaria tenuissima</i>, has exhibited an increase within potato fields in Iran. The economic losses caused by brown leaf spot and detection of cross-resistance among commonly used fungicides have incited research towards identifying alternative biocontrol sources to manage this aggressive pathogen in combination with chemicals. Among bacterial isolates that showed inhibition of <i>A. tenuissima</i> growth, the tested biocontrol properties and plant growth-promoting (PGP) characteristics varied. Three strains with antifungal traits and one strain with PGP capacity were chosen for further in vitro and in vivo experiments. They were identified as <i>Bacillus halotolerans</i>-H14, <i>Bacillus</i> sp.-H52, <i>Serratia polymuthica-</i>FR1, and <i>Stenotrophomonas</i> sp.<i>-</i>J29, respectively, using a combination of phenotypic traits and 16S rRNA sequencing. In co-culturing assays with the aforementioned bacterial strains, it was observed that they induced hyphal structural deformation and suppressed spore germination of <i>A. tenuissima.</i> Monitoring of the disease symptoms showed the ability of H14, FR1, and J29 to decrease disease severity under in vivo challenge experiments. Moreover, the role of aforementioned bacteria was studied in activation of potato defence pathways against <i>A. tenuissima</i>. During <i>Solanum tuberosum-A. tenuissima</i> interaction, biochemical attributes related to defence response such as superoxide and hydrogen peroxide production, redox enzymes (catalase, superoxide dismutase, ascorbate peroxidase, and guaiacol peroxidase), phenylalanine ammonia-lyase activity, and accumulation of total phenolics were markedly increased in potato plants pre-treated with <i>Stenotrophomonas</i> sp.-J29 and <i>Serratia plymuthica-</i>FR and post-inoculated with <i>A. tenuissima</i>. This study provides the initial evidence demonstrating the potential role of <i>Bacillus halotolerans</i>, <i>Serratia plymuthica</i>, and <i>Stenotrophomonas</i> sp. as prohibitor of disease progression as well as biological inducer of resistance in potato—<i>A. tenuissima</i> interplay.</p>","PeriodicalId":20378,"journal":{"name":"Potato Research","volume":null,"pages":null},"PeriodicalIF":2.3000,"publicationDate":"2024-02-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":"{\"title\":\"Utilization of Antagonistic Bacteria for Managing Potato Brown Leaf Spot Caused by Alternaria tenuissima and Plant-Associated Biochemical Changes During Disease Development\",\"authors\":\"Ebrahim Salari, Sareh Baghaee-Ravari\",\"doi\":\"10.1007/s11540-024-09693-5\",\"DOIUrl\":null,\"url\":null,\"abstract\":\"<p>The incidence of brown leaf spot, attributed to <i>Alternaria tenuissima</i>, has exhibited an increase within potato fields in Iran. The economic losses caused by brown leaf spot and detection of cross-resistance among commonly used fungicides have incited research towards identifying alternative biocontrol sources to manage this aggressive pathogen in combination with chemicals. Among bacterial isolates that showed inhibition of <i>A. tenuissima</i> growth, the tested biocontrol properties and plant growth-promoting (PGP) characteristics varied. Three strains with antifungal traits and one strain with PGP capacity were chosen for further in vitro and in vivo experiments. They were identified as <i>Bacillus halotolerans</i>-H14, <i>Bacillus</i> sp.-H52, <i>Serratia polymuthica-</i>FR1, and <i>Stenotrophomonas</i> sp.<i>-</i>J29, respectively, using a combination of phenotypic traits and 16S rRNA sequencing. In co-culturing assays with the aforementioned bacterial strains, it was observed that they induced hyphal structural deformation and suppressed spore germination of <i>A. tenuissima.</i> Monitoring of the disease symptoms showed the ability of H14, FR1, and J29 to decrease disease severity under in vivo challenge experiments. Moreover, the role of aforementioned bacteria was studied in activation of potato defence pathways against <i>A. tenuissima</i>. During <i>Solanum tuberosum-A. tenuissima</i> interaction, biochemical attributes related to defence response such as superoxide and hydrogen peroxide production, redox enzymes (catalase, superoxide dismutase, ascorbate peroxidase, and guaiacol peroxidase), phenylalanine ammonia-lyase activity, and accumulation of total phenolics were markedly increased in potato plants pre-treated with <i>Stenotrophomonas</i> sp.-J29 and <i>Serratia plymuthica-</i>FR and post-inoculated with <i>A. tenuissima</i>. This study provides the initial evidence demonstrating the potential role of <i>Bacillus halotolerans</i>, <i>Serratia plymuthica</i>, and <i>Stenotrophomonas</i> sp. as prohibitor of disease progression as well as biological inducer of resistance in potato—<i>A. tenuissima</i> interplay.</p>\",\"PeriodicalId\":20378,\"journal\":{\"name\":\"Potato Research\",\"volume\":null,\"pages\":null},\"PeriodicalIF\":2.3000,\"publicationDate\":\"2024-02-07\",\"publicationTypes\":\"Journal Article\",\"fieldsOfStudy\":null,\"isOpenAccess\":false,\"openAccessPdf\":\"\",\"citationCount\":\"0\",\"resultStr\":null,\"platform\":\"Semanticscholar\",\"paperid\":null,\"PeriodicalName\":\"Potato Research\",\"FirstCategoryId\":\"97\",\"ListUrlMain\":\"https://doi.org/10.1007/s11540-024-09693-5\",\"RegionNum\":3,\"RegionCategory\":\"农林科学\",\"ArticlePicture\":[],\"TitleCN\":null,\"AbstractTextCN\":null,\"PMCID\":null,\"EPubDate\":\"\",\"PubModel\":\"\",\"JCR\":\"Q1\",\"JCRName\":\"AGRONOMY\",\"Score\":null,\"Total\":0}","platform":"Semanticscholar","paperid":null,"PeriodicalName":"Potato Research","FirstCategoryId":"97","ListUrlMain":"https://doi.org/10.1007/s11540-024-09693-5","RegionNum":3,"RegionCategory":"农林科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q1","JCRName":"AGRONOMY","Score":null,"Total":0}
Utilization of Antagonistic Bacteria for Managing Potato Brown Leaf Spot Caused by Alternaria tenuissima and Plant-Associated Biochemical Changes During Disease Development
The incidence of brown leaf spot, attributed to Alternaria tenuissima, has exhibited an increase within potato fields in Iran. The economic losses caused by brown leaf spot and detection of cross-resistance among commonly used fungicides have incited research towards identifying alternative biocontrol sources to manage this aggressive pathogen in combination with chemicals. Among bacterial isolates that showed inhibition of A. tenuissima growth, the tested biocontrol properties and plant growth-promoting (PGP) characteristics varied. Three strains with antifungal traits and one strain with PGP capacity were chosen for further in vitro and in vivo experiments. They were identified as Bacillus halotolerans-H14, Bacillus sp.-H52, Serratia polymuthica-FR1, and Stenotrophomonas sp.-J29, respectively, using a combination of phenotypic traits and 16S rRNA sequencing. In co-culturing assays with the aforementioned bacterial strains, it was observed that they induced hyphal structural deformation and suppressed spore germination of A. tenuissima. Monitoring of the disease symptoms showed the ability of H14, FR1, and J29 to decrease disease severity under in vivo challenge experiments. Moreover, the role of aforementioned bacteria was studied in activation of potato defence pathways against A. tenuissima. During Solanum tuberosum-A. tenuissima interaction, biochemical attributes related to defence response such as superoxide and hydrogen peroxide production, redox enzymes (catalase, superoxide dismutase, ascorbate peroxidase, and guaiacol peroxidase), phenylalanine ammonia-lyase activity, and accumulation of total phenolics were markedly increased in potato plants pre-treated with Stenotrophomonas sp.-J29 and Serratia plymuthica-FR and post-inoculated with A. tenuissima. This study provides the initial evidence demonstrating the potential role of Bacillus halotolerans, Serratia plymuthica, and Stenotrophomonas sp. as prohibitor of disease progression as well as biological inducer of resistance in potato—A. tenuissima interplay.
期刊介绍:
Potato Research, the journal of the European Association for Potato Research (EAPR), promotes the exchange of information on all aspects of this fast-evolving global industry. It offers the latest developments in innovative research to scientists active in potato research. The journal includes authoritative coverage of new scientific developments, publishing original research and review papers on such topics as:
Molecular sciences;
Breeding;
Physiology;
Pathology;
Nematology;
Virology;
Agronomy;
Engineering and Utilization.