Abstract
Lily symptomless virus (LSV) is one of the most prevalent viruses that infect lily plants worldwide. A rapid and sensitive reverse transcription loop-mediated isothermal amplification (RT-LAMP) assay was developed for detection of LSV, using two primer pairs that specifically amplified the conserved sequence of LSV coat protein. The optimum reaction conditions were as follows: 4mM MgCl2 and 0.8M betaine with incubation at 64°C for 30min. The limit of detection of LSV from infected lily leaves was 10-fold higher for RT-LAMP than for conventional RT-PCR. Moreover, RT-LAMP detected LSV in not only symptomatic, but also in symptomless tissues of infected plants. These findings indicate that our RT-LAMP method for LSV can serve as a low-cost, simple, and rapid alternative to conventional detection assays.
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