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Acta Horticulturae Sinica ›› 2024, Vol. 51 ›› Issue (11): 2701-2709.doi: 10.16420/j.issn.0513-353x.2023-0701

• New Technology and New Method • Previous Articles     Next Articles

Establishment of RT-RPA-LFD Method for Rapid Detection of Telosma Mosaic Virus in Passiflora

DING Huijiao1,2, WANG Hao1, BAO Fangwei1, SUN Geng1, PANG Jingjun1, FAN Zaifeng1,2, ZHAO Wenjun3,*(), ZHOU Tao1,2,*()   

  1. 1 College of Plant Protection,China Agricultural University,Beijing 100193,China
    2 Sanya Institute,China Agricultural University,Sanya,Hainan 572025,China
    3 Center for Biosafety,Chinese Academy of Inspection and Quarantine,Sanya,Hainan 572019,China
  • Received:2024-05-27 Revised:2024-08-29 Online:2024-12-12 Published:2024-11-26
  • Contact: ZHAO Wenjun, ZHOU Tao

Abstract:

Primers and probe were designed according to the coat protein(CP)gene of telosma mosaic virus(TeMV)on passion fruit,and recombinase polymerase amplification(RPA)was combined with lateral flow dipstick(LFD)to establish a method for rapid detection of TeMV. The reaction time,temperature,probe concentration and primers concentration of the method were optimized,and then the specificity and sensitivity of the metho also were examined. The experimental results show that the optimal reaction temperature was 37 ℃,optimal reaction time was 13 min,optimal probe concentration was 5 μmol · L-1,and the optimal primers concentration was 10 μmol · L-1. The method can specifically detect TeMV,and the minimum detection limit could reach to 5.125 × 10-4 ng · μL-1 for plasmids containing TeMV cp,which is ten thousand times more sensitive than ordinary PCR detection. This method has high sensitivity and specificity,which can be used to detect passion fruit samples in the field.

Key words: Passiflora, telosma mosaic virus, recombinase polymerase amplification, lateral flow dipstick, detection, visualization