title: Fast detection of Southern tomato virus by one-step transcription loop-mediated isothermal amplification (RT-LAMP).
abstract: Southern tomato virus (STV) is a double stranded RNA (dsRNA) virus belonging to genus Amalgavirus (family Amalgamaviridae) which has been detected in tomato plants showing stunting, fruit discoloration and size reduction. A one-step reverse-transcription loop-mediated isothermal amplification (RT-LAMP) assay was developed for the detection of STV in total RNA or sap extracts (obtained just by grinding in buffer) from STV-infected tomato plants by using a set of three primers pairs which were designed to the sequence of the STV putative coat protein. Amplification products were visualized by gel electrophoresis or direct staining of DNA. The sensitivity of RT-LAMP was identical to that of the conventional RT-PCR and less affected by the presence of polymerase inhibitors. STV was detected by RT-LAMP in different tomato tissues, i.e. leaves, roots, fruits and seeds. Also the virus was successfully detected by RT-LAMP from sap extracts obtained from field tomato plants whereas conventional RT-PCR did not. Results of this work show that RT-LAMP is a specific, rapid and cheap procedure to detect STV and it could be implemented on field surveys and sanitation programs.
authors.affiliation: Instituto Valenciano de Investigaciones Agrarias, Valencia, Spain.
authors.forename: L
authors.initials: L
authors.lastname: Elvira-González
authors.affiliation: Instituto Valenciano de Investigaciones Agrarias, Valencia, Spain.
authors.forename: A V
authors.initials: AV
authors.lastname: Puchades
authors.affiliation: Instituto Valenciano de Investigaciones Agrarias, Valencia, Spain; Department of Agricultural and Forestry Science, University of Palermo, Palermo, Italy.
authors.forename: C
authors.initials: C
authors.lastname: Carpino
authors.affiliation: Grupo de Virologıía, Instituto Agroforestal Mediterráneo, Universidad Politécnica de Valencia (UPV), Valencia, Spain.
authors.forename: A
authors.initials: A
authors.lastname: Alfaro-Fernandez
authors.affiliation: Grupo de Virologıía, Instituto Agroforestal Mediterráneo, Universidad Politécnica de Valencia (UPV), Valencia, Spain.
authors.forename: M I
authors.initials: MI
authors.lastname: Font-San-Ambrosio
authors.affiliation: Instituto Valenciano de Investigaciones Agrarias, Valencia, Spain; Euro- Mediterranean Institute of Science and Technology (IEMEST), Palermo, Italy.
authors.forename: L
authors.initials: L
authors.lastname: Rubio
authors.affiliation: Instituto Valenciano de Investigaciones Agrarias, Valencia, Spain; Euro- Mediterranean Institute of Science and Technology (IEMEST), Palermo, Italy; Departamento de Biotecnología, Escuela Técnica Superior de Ingeniería Agronómica y del Medio Natural, Universidad Politécnica de Valencia (UPV), Valencia, Spain. Electronic address: galipienso_lui@gva.es.
authors.forename: L
authors.initials: L
authors.lastname: Galipienso
mesh_terms: D017931:DNA Primers / Q000235:genetics; D018551:Solanum lycopersicum / Q000821:virology*; D021141:Nucleic Acid Amplification Techniques / Q000379:methods*; D010935:Plant Diseases / Q000821:virology; D010942:Plant Viruses / Q000235:genetics / Q000302:isolation & purification*; D012367:RNA, Viral / Q000235:genetics* / Q000302:isolation & purification; D048348:Reverse Transcription; D012680:Sensitivity and Specificity; D013696:Temperature
chemical_list: D017931:DNA Primers; D012367:RNA, Viral
keywords: Amalgamaviru; Plant virus; STV; Seed-borne virus; Solanum lycopersicum