1. 新疆农垦科学院 科研管理处,新疆,石河子,832000
2. 新疆农垦科学院 农田水利与土壤肥料研究所,新疆,石河子,832000
3. 农业农村部西北绿洲节水农业重点实验室/水肥资源高效利用兵团重点实验室,新疆,石河子,832000
收稿:2025-05-23,
纸质出版:2025
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于航,王国栋,李全胜.一株番茄早疫病拮抗菌筛选鉴定及其抗菌脂肽合成基因分析[J].新疆大学学报(自然科学版 汉文、维吾尔文),2025,40(1):48-57.
YU Hang,WANG Guodong,LI Quansheng.Screening and identification of an antagonistic bacterium against tomato early blight and analysis of its antimicrobial peptide synthesis genes[J].Journal of Xinjiang University(Natural Science Edition in Chinese and Uyghur),2025,40(1):48-57.
于航,王国栋,李全胜.一株番茄早疫病拮抗菌筛选鉴定及其抗菌脂肽合成基因分析[J].新疆大学学报(自然科学版 汉文、维吾尔文),2025,40(1):48-57. DOI:
YU Hang,WANG Guodong,LI Quansheng.Screening and identification of an antagonistic bacterium against tomato early blight and analysis of its antimicrobial peptide synthesis genes[J].Journal of Xinjiang University(Natural Science Edition in Chinese and Uyghur),2025,40(1):48-57. DOI:
新疆加工番茄产业地位重要,但番茄早疫病频发严重制约其发展.随着绿色健康可持续农业发展的需求,生物防治成为研究热点.采用系列稀释涂布法从新疆长期连作番茄农田的根际土壤中分离细菌,利用平板对峙法筛选番茄早疫病拮抗细菌,经过形态学观察、生理生化实验及16S rDNA基因序列分析鉴定菌株属种分类,采用PCR扩增法检测其抗菌肽合成基因,获得一株对番茄早疫病菌(Alternaria solani)高效拮抗菌株KM432,其抑菌率达61.45%,可在pH 9.0和6%氯化钠条件下生长.菌株KM432含有srfAA、ituC 、bacA、bmyB共4种抗菌肽合成基因.以上结果表明菌株KM432兼具耐盐碱和拮抗病原真菌功能,有在番茄病害绿色防控中应用的潜力.
The processing tomato industry in Xinjiang holds significant importance
but the frequent occurrence of early blight severely hampers its development. With the growing demand for green
healthy
and sustainable agriculture
biological control has become a research hotspot. In this study
bacteria are isolated from the rhizosphere soil of tomatoes in long-term continuous cropping fields in Xinjiang using a serial dilution plating method. Antagonistic bacteria against tomato early blight are screened using a dual-culture plate assay. The isolated strain is identified to genus and species level through morphological observation
physiological and biochemical tests
and 16S rDNA gene sequence analysis. Their antimicrobial peptide synthesis genes were detected using PCR amplification. A highly effective antagonistic strain
KM432
against Alternaria solani (the pathogen causing tomato early blight) is obtained
with an inhibition rate of 61.45%. This strain can grow under conditions of pH 9.0 and 6% NaCl. Strain KM432 possesses four antimicrobial peptide synthesis genes: srfAA
ituC
bacA
and bmyB. These results indicate that strain KM432 combines saline-alkali tolerance with pathogenic fungus antagonism
demonstrating potential for application in the green management of tomato diseases.
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