European Journal of Plant Pathology

, Volume 137, Issue 3, pp 597–607 | Cite as

Development and evaluation of specific PCR and LAMP assays for the rapid detection of Phytophthora melonis

  • Qinghe Chen
  • Benjin Li
  • Peiqing Liu
  • Chengzhong Lan
  • Zhixiong ZhanEmail author
  • Qiyong WengEmail author


Phytophthora melonis is a widespread and devastating pathogen for the Cucurbitaceae family. Early and accurate detection of P. melonis is essential to control the disease in the field. To establish a simple, visual, and rapid detection system for P. melonis, we developed nested polymerase chain reaction (PCR) and loop-mediated isothermal amplification (LAMP) systems based on the Ras-related protein (Ypt1) gene. All 36 isolates of P. melonis, from geographically distinct counties in China, yielded positive detection results on LAMP or nested PCR assays. No cross reaction was observed with other oomycetes or fungal pathogens. A sensitivity assay showed that both methods had a detection limit of 10 fg genomic DNA. We also detected P. melonis in diseased cucumber tissues and soils, and evaluated positive detection rates using LAMP, nested PCR, and conventional isolation methods. The results suggest that the LAMP assay has the greatest potential for active detection of P. melonis in regions that are at risk of contracting the disease, and for use in resource-poor settings.


Loop-mediated isothermal amplification (LAMP) Molecular detection Phytophthora melonis Ras-related protein (Ypt1) gene 



This work was supported by grants from the Natural Science Foundation for Distinguished Young Scholars of Fujian Province (2011J06010), Doctoral Foundation of FAAS (2012DBS-2), and Special Fund for Agro-scientific Research in the Public Interest (201303018; 200903034).

Supplementary material

10658_2013_273_MOESM1_ESM.doc (64 kb)
ESM 1 (DOC 64 kb)


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Copyright information

© KNPV 2013

Authors and Affiliations

  1. 1.Institute of Plant ProtectionFujian Academy of Agricultural SciencesFuzhouChina

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