Development of a real-time fluorescence loop-mediated isothermal amplification assay for rapid and quantitative detection of Ustilago maydis
文献类型： 外文期刊
作者： Cao, Yanyong 1 ; Wang, Lifeng 1 ; Duan, Liping 2 ; Li, Jingjing 1 ; Ma, Juan 1 ; Xie, Shuna 3 ; Shi, Lei 2 ; Li, Huiyong 1 ;
作者机构： 1.Henan Acad Agr Sci, Inst Cereal Crops, Zhengzhou 450002, Henan, Peoples R China
2.Jinan Univ, Inst Food Safety & Nutr, Guangzhou 510632, Guangdong, Peoples R China
3.Henan Acad Agr Sci, Inst Plant Protect, Zhengzhou 450002, Henan, Peoples R China
期刊名称：SCIENTIFIC REPORTS （ 影响因子：4.379； 五年影响因子：5.133 ）
ISSN： 2045-2322
年卷期： 2017 年 7 卷
页码：
收录情况： SCI
摘要： The common smut of corn, caused by Ustilago maydis is a troublesome disease of maize. Early and accurate detection of U. maydis is essential for the disease management. In this study, primer set Pep-2 was selected for LAMP (loop-mediated isothermal amplification) from 12 sets of primers targeting three U. maydis effector genes See1, Pit2 and Pep1 according to primer screening. The optimal concentrations of Bst DNA polymerase and Mg2+ as well as inner/outer primer ratio of the LAMP reaction system were screened by combining a single factor experiment and an orthogonal design arrangement. The specificity of this real-time LAMP (RealAmp) assay was confirmed by negative testing for other pathogens. The detection sensitivity of the RealAmp assay was 200 times higher than that of detection through conventional PCR. Results of the RealAmp assay for quantifying the genomic DNA of U. maydis were confirmed by testing with both artificially and naturally infected samples. In addition, the RealAmp reaction could be conducted via an improved tube scanner to implement a "electricity free" assay from template preparation to quantitative detection. The resulting assay could be more convenient for use in the field as a simple, rapid, and effective technique for monitoring U. maydis.
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