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Acta Horticulturae Sinica ›› 2022, Vol. 49 ›› Issue (11): 2479-2488.doi: 10.16420/j.issn.0513-353x.2021-0606

• New Technology and New Methods • Previous Articles     Next Articles

Establishment and Application of Real-Time PCR for Quantitative Detection of Fusarium oxysporum f. sp. lycopersici

MENG Zhen1, ZHANG Weiping1, WANG Ying1, LI Long3, JI Xiaoxue1, DONG Bei2,**(), QIAO Kang1,**()   

  1. 1College of Plant Protection,Shandong Agricultural University,Tai’an,Shandong 271018,China
    2Jinan Academy of Agricultural Sciences,Jinan 250316,China
    3Tai’an Institute for Food and Drug Control,Tai’an,Shandong 271000,China
  • Received:2022-06-24 Revised:2022-08-16 Online:2022-11-25 Published:2022-11-25
  • Contact: DONG Bei,QIAO Kang E-mail:1985dongbei@163.com;qiaokang@sdau.edu.cn

Abstract:

In this study,a pair of specific primers,209F/361R,were designed to establish a real-time PCR(RT-PCR)reaction system of Fusarium oxysporum f. sp. lycopersici(FOL)based on the protein kinase gene sequences of FOL. FOL was detected at the base of tomato stems using this assay. Results of RT-PCR assays showed that only one absorption peak was detected with the primers for F. oxysporum and no absorption peak was produced for other tested strains. The RT-PCR detection system established with the primers showed a good linear relationship. The detection sensitivity was 5.76 × 103 copies · μL-1,which was 10 times more sensitive than the conventional PCR. Moreover,FOL was detected at the base of the tomato stems at the 7th day after artificial inoculation. Twenty-four naturally infected tomato samples were collected from field condition and the RT-PCR results showed that FOL was detected in 16 samples. The established RT-PCR detection system for F. oxysporum was fast,highly specific,sensitive,and reproducible,providing scientific tools for epidemic monitoring and early diagnosis of Fusarium wilt of tomato.

Key words: Tomato Fusarium wilt, Fusarium oxysporum f. sp. lycopersici, RT-PCR, early detection technology

CLC Number: