Rapid Visual Detection of Peronophythora litchii on Lychees Using Recombinase Polymerase Amplification Combined with Lateral Flow Assay Based on the Unique Target Gene Pl_101565
文献类型： 外文期刊
作者： Wang, Rongbo 1 ; Li, Benjin 1 ; Shi, Mingyue 1 ; Zhao, Yumei 1 ; Lin, Jinlong 1 ; Chen, Qinghe 2 ; Liu, Peiqing 1 ;
作者机构： 1.Fujian Acad Agr Sci, Inst Plant Protect, Fujian Key Lab Monitoring & Integrated Management, Fuzhou 350003, Peoples R China
2.Hainan Univ, Sanya Inst Breeding & Multiplicat, Sch Trop Agr & Forestry, Sanya, Peoples R China
关键词： Peronophythora litchii; recombinase polymerase amplification; lateral flow; lychee
期刊名称：PLANTS-BASEL （ 影响因子：4.5； 五年影响因子：4.8 ）
ISSN： 2223-7747
年卷期： 2024 年 13 卷 4 期
页码：
收录情况： SCI
摘要： Downy blight, caused by Peronophythora litchii, is a destructive disease that impacts lychee fruit throughout the pre-harvest, post-harvest, and transportation phases. Therefore, the prompt and precise identification of P. litchii is crucial for the effective management of the disease. A novel gene encoding a Rh-type ammonium transporter, Pl_101565, was identified in P. litchii through bioinformatic analysis in this study. Based on this gene, a coupled recombinase polymerase amplification-lateral flow (RPA-LF) assay for the rapid visual detection of P. litchii was developed. The assay has been shown to detect P. litchii accurately, without cross-reactivity to related pathogenic oomycetes or fungi. Moreover, it can be performed effectively within 15 to 25 min at temperatures ranging from 28 to 46 C-degrees. Under optimized conditions, the RPA-LF assay could detect as low as 1 pg of P. litchii genomic DNA in a 25 mu L reaction system. Furthermore, the RPA-LF assay successfully detected P. litchii in infected lychee samples within a 30 min timeframe. These attributes establish the RPA-LF assay as a rapid, sensitive, and specific method for diagnosing P. litchii early; it is particularly suitable for applications in resource-limited settings.
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