Jornal de Patologia Vegetal e Microbiologia

Abstrato

Immunocapture Loop Mediated Isothermal Amplification for Rapid Detection of Tomato Yellow Leaf curl Virus (TYLCV) without DNA Extraction

Mohammad Amin Almasi, Seyedmohammad Hosseyni Dehabadi and Zahra Eftekhari

To diminish the time required for some diagnostic assays including polymerase chain reaction (PCR), loopmediated isothermal amplification (LAMP; due to mainly DNA extraction step) and also DAS-ELISA into a minimum level, an innovative immunocapture LAMP (IC–LAMP) and immunocapture PCR (IC-PCR) protocol on the basis of Tomato Yellow Leaf curl Virus (TYLCV) genome were used and optimized. Even though DAS-ELISA, IC-PCR and IC–LAMP assays could successfully detect positive infected plant samples, considering the time, safety, sensitivity, cost, no need of DNA extraction and simplicity the last one was overall superior. The hydroxynaphthol blue could produce long stable colour change and brightness in a close tube-based approach to prevent cross-contamination risk. Altogether, as IC–LAMP is sensitive, cost effective, fairly user friendly and also can generate more accurate results than previous diagnostic procedures, we accordingly propose this assay as a highly reliable alternative viral recognition system regarding TYLCV recognition and probably other viral-based diseases.