Development and Evaluation of Loop-Mediated Isothermal Amplification Assay for Rapid Detection of Tylenchulus semipenetrans Using DNA Extracted from Soil
文献类型： 外文期刊
作者： Song, Zhi-Qiang 2 ; Cheng, Ju-E 2 ; Cheng, Fei-Xue 2 ; Zhang, De-Yong 1 ; Liu, Yong 1 ;
作者机构： 1.Hunan Agr Univ, Coll Plant Protect, Changsha 410128, Peoples R China
2.Hunan Acad Agr Sci, Inst Plant Protect, Changsha 410125, Peoples R China
关键词： citrus slow decline disease;DNA extraction;loop-mediated isothermal amplification;nematode detection;Tylenchulus semipenetrans
期刊名称：PLANT PATHOLOGY JOURNAL （ 影响因子：1.795； 五年影响因子：2.314 ）
ISSN： 1598-2254
年卷期： 2017 年 33 卷 2 期
页码：
收录情况： SCI
摘要： Tylenchulus semipenetrans is an important and wide-spread plant-parasitic nematode of citrus worldwide and can cause citrus slow decline disease leading to significant reduction in tree growth and yield. Rapid and accurate detection of T semipenetrans in soil is important for the disease forecasting and management. In this study, a loop-mediated isothermal amplification (LAMP) assay was developed to detect T semipenetrans using DNA extracted from soil. A set of five primers was designed from the internal transcribed spacer region (ITS1) of rDNA, and was highly specific to L semipenetrans. The LAMP reaction was performed at 63 degrees C for 60 min. The LAMP product was visualized directly in one reaction tube by adding SYBR Green I. The detection limit of the LAMP assay was 10(-2) J2/0.5 g of soil, which was 10 times more sensitive than conventional PCR (10(-1) J2/0.5 g of soil). Examination of 24 field soil samples revealed that the LAMP assay was applicable to a range of soils infested naturally with T semipenetrans, and the total assay time was less than 2.5 h. These results indicated that the developed LAMP assay is a simple, rapid, sensitive, specific and accurate technique for detection of T semipenetrans in field soil, and contributes to the effective management of citrus slow decline disease.
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