Development of a One-Step Immunocapture Real-Time RT-PCR Assay for Detection of Tobacco Mosaic Virus in Soil

文献类型： 外文期刊

第一作者： Yang, Jin-Guang

作者： Yang, Jin-Guang;Wang, Feng-Long;Chen, De-Xin;Shen, Li-Li;Qian, Yu-Mei;Liang, Zhi-Yong;Zhou, Wen-Chang;Yan, Tai-He

作者机构：

关键词： Tobacco mosaic virus;immunocapture qRT-PCR;detection;soil

期刊名称：SENSORS （ 影响因子：3.576； 五年影响因子：3.735 ）

ISSN： 1424-8220

年卷期： 2012 年 12 卷 12 期

页码：

收录情况： SCI

摘要： Tobacco mosaic virus (TMV) causes significant losses in many economically important crops. Contaminated soils may play roles as reservoirs and sources of transmission for TMV. In this study we report the development of an immunocapture real-time RT-PCR (IC-real-time RT-PCR) assay for direct detection of TMV in soils without RNA isolation. A series of TMV infected leaf sap dilutions of 1:10(1), 1:10(2), 1:10(3), 1:10(4), 1:10(5) and 1:10(6) (w/v, g/mL) were added to one gram of soil. The reactivity of DAS-ELISA and conventional RT-PCR was in the range of 1:10(2) and 1:10(3) dilution in TMV-infested soils, respectively. Meanwhile, the detection limit of IC-real-time RT-PCR sensitivity was up to 1:10(6) dilution. However, in plant sap infected by TMV, both IC-real-time RT-PCR and real-time RT-PCR were up to 1:10(6) dilution, DAS-ELISA could detect at least 1:10(3) dilution. IC-real-time RT-PCR method can use either plant sample extracts or cultivated soils, and show higher sensitivity than RT-PCR and DAS-ELISA for detection of TMV in soils. Therefore, the proposed IC-real-time RT-PCR assay provides an alternative for quick and very sensitive detection of TMV in soils, with the advantage of not requiring a concentration or RNA purification steps while still allowing detection of TMV for disease control.

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