Abstract
A reverse-transcription loop-mediated isothermal amplification (RT-LAMP) assay was developed to detect plantago asiatica mosaic virus (PlAMV), one of the most damaging lily-infecting viruses and a member of the genus Potexvirus in the family Alphaflexiviridae. A set of six primers was designed based on the central core region of the coat protein gene of the Li1 isolate of PlAMV, which detected the isolate most efficiently at 65 °C. The RT-LAMP assay specifically detected several PlAMV isolates with a high level of genetic and biological variation, but not potato virus X (another virus species in the same Potexvirus genus). The sensitivity of the RT-LAMP was tenfold higher than that of conventional RT-PCR. Moreover, with a simple method using a toothpick, PlAMV was directly detected from infected lily leaves using the RT-LAMP assay without RNA extraction. This simple and highly sensitive method can be used for rapid surveys for PlAMV.
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Acknowledgments
We thank Mr. T. Moriyama for providing lily plants. This work was supported in part by Grants-in-Aid for Young Scientists (B) (26850231) from the Japan Society for the Promotion of Science.
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10327_2015_599_MOESM1_ESM.pptx
Effect of healthy lily sap on RT-LAMP reaction. RT-LAMP amplification curves using total RNA (1 pg or 100 fg) isolated from a Li1-infected plant of Nicotiana benthamiana as the template are shown. In the sample marked “+ healthy lily sap”, a toothpick which had pricked healthy lily leaf (Fig. 5, healthy lily2) was dipped into the LAMP reaction mixture. RT-LAMP reaction was run for 50 min at 65 °C. (PPTX 49 kb)
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Komatsu, K., Maejima, K., Fujita, N. et al. A detection method based on reverse transcription loop-mediated isothermal amplification for a genetically heterogeneous plantago asiatica mosaic virus. J Gen Plant Pathol 81, 297–303 (2015). https://doi.org/10.1007/s10327-015-0599-6
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DOI: https://doi.org/10.1007/s10327-015-0599-6