数字农科院2.0

Development Of A Loop-Mediated Isothermal Amplification (Lamp) Assay For Rapid Detection Of Pseudomonas Syringae Pv. Tomato In Planta

文献类型： 外文期刊

作者： Chen, ZD; Kang, HJ; Chai, AL; Shi, YX; Xie, XW; Li, L; Li, BJ

作者机构：

关键词： Tomato Bacterial Speck; Pseudomonas Syringae Pv; Tomato; Loop-Mediated Isothermal Amplification (Lamp); Visualization

期刊名称： EUROPEAN JOURNAL OF PLANT PATHOLOGY

ISSN： 0929-1873

年卷期： 2020 年 156 卷 3 期

页码：

收录情况： JCR（2021版）

摘要： Tomato bacterial speck, caused by Pseudomonas syringae pv. tomato (Pst), is one of the most devastating bacterial diseases in tomato worldwide. To establish a rapid amplification system for the detection of Pst, a loop-mediated isothermal amplification (LAMP) method, which includes two external primers (F3/B3), two internal primers (FIP/BIP) and one backward loop primer (B-Loop), was designed based on the hrpZ gene. The specificity of the LAMP primer set was widely validated on Pst and non-target strains. The conditions for LAMP detection of Pst were optimized to complete in 60 min at 63 degrees C. The amplification was confirmed through gel electrophoresis or visual inspection using calcein. In the sensitivity test, the detection limit of the LAMP assay was 1.61 x 10 fg mu L-1 for genomic DNA and 1.05 x 10(3) CFU mL(-1) for bacterial suspension without DNA extraction. The novel method was also applied for the detection of Pst in artificially and naturally infected tomato leaf and stem tissue samples, and even the early onset of disease could be detected by the assay. This method can rapidly detect Pst-infected tissues without strain enrichment and complex DNA extraction, and hence, it is suitable for quarantine and field detection.

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