ArticleMolecular biotechnology2026
A Rapid PCR-LAMP Assay for the Early Detection of Lasiodiplodia theobromae from Basal Stem Rot-Infected Passion Fruit Plants.
Article in Molecular biotechnology, 2026. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 2 papers.
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2 citing papers in PubMed.
- Research progress on nucleic acid amplification-based detection technologies for phytopathogenic fungi.Applied microbiology and biotechnology · 2026Review
- Identification and Genomic Insights into the Biological Control and Growth-Promoting Mechanism ofMicroorganisms · 2025Article
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Authors and funding
8 authors.
Funding
Abstract
Lasiodiplodia theobromae is an emerging threat and the main pathogenic fungi associated with basal stem rot of passion fruit in Guangxi Zhuang Autonomous Region, China. Current pathogen identification protocols are labor-intensive and time-consuming, emphasizing the need for more efficient methods to enable precise surveillance of L. theobromae for early detection and warning. The present study sought to develop a rapid colorimetric LAMP assay for early detection and surveillance of L. theobromae in passion fruit plants. For that, amplifications of ITS locus were performed on fungal genomic DNA using conventional PCR, with the specific primer pair ITS1 and ITS4. The hydroxy naphthol blue (HNB)-dependent colorimetric LAMP assay was then optimized by varying primer sets, inner primers concentration, reaction temperatures and incubation time. A microbial lysis buffer was employed to extract genomic DNA from stems infected with L. theobromae. The prime LAMP primer set targeting the ITS region of L. theobromae was designed and an HNB based colorimetric LAMP assay was optimized. Various optimization parameters were evaluated, with the optimal conditions determined as 1.6 μM of each FIB and BIP, 0.2 μM of each F3 and B3, and incubation at 65 °C for 40 min. This ITS-based LAMP assay could effectively distinguish L. theobromae from less dominant pathogens in passion fruits with a detection limit of 3 pg for ITS locus amplicons. Our proposed method utilizing a microbial lysis buffer enables rapid and cost-effective detection of L. theobromae DNA in early-infected passion fruit plants, eliminating the need for microbial cultivation and DNA purification.
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