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Development of recombinase polymerase amplification combined with a lateral flow dipstick assay for rapid and simple detection of Tylenchulus semipenetrans in soil

文献类型： 外文期刊

作者： Song, Zhiqiang 1 ; Cheng, Yi 1 ; Wang, Tuhong 1 ; Wang, Qipei 1 ; Qiu, Caisheng 1 ; Qiu, Huajiao 1 ;

作者机构： 1.Chinese Acad Agr Sci, Inst Bast Fiber Crops, Changsha 410205, Peoples R China

关键词： citrus; Tylenchulus semipenetrans; recombinase polymerase amplification; lateral flow dipstick; nematode detection

期刊名称：PEST MANAGEMENT SCIENCE （ 影响因子：3.8； 五年影响因子：4.3 ）

ISSN： 1526-498X

年卷期： 2025 年 81 卷 6 期

页码：

收录情况： SCI

摘要： BACKGROUNDTylenchulus semipenetrans, the causal agent of citrus slow decline disease, is one of the most destructive plant-parasitic nematodes in all citrus-growing regions of the world, causing significant reductions in citrus growth and yield. Accurate and rapid detection of T. semipenetrans is critical for the diagnosis and effective control of the disease.RESULTSWe developed a rapid, visual, isothermal detection method using recombinase polymerase amplification combined with a lateral flow dipstick (RPA-LFD) assay to detect T. semipenetrans in soil. The primers and a probe were designed based on sequence differences in the internal transcribed spacer region 1 (ITS1) of ribosomal DNA (rDNA) among T. semipenetrans and four other Tylenchulus species. The RPA reaction can be performed in 10-25 min at a constant temperature ranging from 30 to 45 degrees C, and the result can be read directly on the LFD within 3 min. Under the optimized conditions, the RPA-LFD assay could specifically detect T. semipenetrans with a sensitivity as low as 10-2 second-stage juveniles/0.5 g soil, which was 10-fold more sensitive than that of the conventional PCR assay. Furthermore, we combined a soil DNA extraction method with the RPA-LFD assay to achieve simple and rapid detection of T. semipenetrans in natural field soil samples within 1 h.CONCLUSIONThe developed RPA-LFD assay is a simple, rapid, specific, sensitive and visual method for detecting T. semipenetrans. It shows great potential for on-site rapid detection applications, especially in resource-limited settings. (c) 2025 Society of Chemical Industry.

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