Rapid detection of potyviruses from crude plant extracts

Potyviruses (genus Potyvirus; family Potyviridae) are widely distributed and represent one of the most economically important genera of plant viruses. Therefore, their accurate detection is a key factor in developing efficient control strategies. However, this can sometimes be problematic particular...

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Bibliographic Details
Published in:Analytical biochemistry 2018-04, Vol.546, p.17-22
Main Authors: Silva, Gonçalo, Oyekanmi, Joshua, Nkere, Chukwuemeka K., Bömer, Moritz, Kumar, P. Lava, Seal, Susan E.
Format: Article
Language:English
Subjects:
Dioscorea - virology
Isothermal amplification
Nucleic Acid Amplification Techniques
Plant Extracts
Potyvirus
Potyvirus - genetics
Potyvirus - isolation & purification
Rapid diagnostics
Recombinase polymerase amplification
Recombinases - metabolism
Reverse Transcriptase Polymerase Chain Reaction
Yam
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Summary:Potyviruses (genus Potyvirus; family Potyviridae) are widely distributed and represent one of the most economically important genera of plant viruses. Therefore, their accurate detection is a key factor in developing efficient control strategies. However, this can sometimes be problematic particularly in plant species containing high amounts of polysaccharides and polyphenols such as yam (Dioscorea spp.). Here, we report the development of a reliable, rapid and cost-effective detection method for the two most important potyviruses infecting yam based on reverse transcription-recombinase polymerase amplification (RT-RPA). The developed method, named ‘Direct RT-RPA’, detects each target virus directly from plant leaf extracts prepared with a simple and inexpensive extraction method avoiding laborious extraction of high-quality RNA. Direct RT-RPA enables the detection of virus-positive samples in under 30 min at a single low operation temperature (37 °C) without the need for any expensive instrumentation. The Direct RT-RPA tests constitute robust, accurate, sensitive and quick methods for detection of potyviruses from recalcitrant plant species. The minimal sample preparation requirements and the possibility of storing RPA reagents without cold chain storage, allow Direct RT-RPA to be adopted in minimally equipped laboratories and with potential use in plant clinic laboratories and seed certification facilities worldwide.
ISSN:0003-2697
1096-0309
DOI:10.1016/j.ab.2018.01.019