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Redalyc.DETECCIÓN DE Cymbidium Mosaic Virus (Cymmv) Y Agrociencia ISSN: 1405-3195 [email protected] Colegio de Postgraduados México López-Hernández, M. Siboney; Palacios-Popo, P. Eloisa; De La Torre-Almaraz, Rodolfo DETECCIÓN DE Cymbidium mosaic virus (CymMV) Y Odontoglossum ringspot virus (ORSV) EN ORQUÍDEAS EN MÉXICO Agrociencia, vol. 48, núm. 5, julio-agosto, 2014, pp. 525-536 Colegio de Postgraduados Texcoco, México Disponible en: http://www.redalyc.org/articulo.oa?id=30232500006 Cómo citar el artículo Número completo Sistema de Información Científica Más información del artículo Red de Revistas Científicas de América Latina, el Caribe, España y Portugal Página de la revista en redalyc.org Proyecto académico sin fines de lucro, desarrollado bajo la iniciativa de acceso abierto DETECCIÓN DE Cymbidium mosaic virus (CymMV) Y Odontoglossum ringspot virus (ORSV) EN ORQUÍDEAS EN MÉXICO DETECTION OF Cymbidium mosaic virus (CymMV) AND Odontoglossum ringspot virus (ORSV) FROM ORCHIDS IN MEXICO M. Siboney López-Hernández, P. Eloisa Palacios-Popo, Rodolfo De La Torre-Almaraz* Laboratorio de Microbiología. UBIPRO. FES-Iztacala, Universidad Nacional Autónoma de México, Avenida de los Barrios Número 1. Los Reyes Iztacala. 54090. Tlalnepantla, Estado de México. ([email protected]). Resumen AbstRAct En recorridos realizados en 2011 para la detección de enfer- In a field inspection of commercial greenhouse orchids medades en orquídeas en invernaderos comerciales en el Esta- in 2011 in the state of Morelos, plants were observed do de Morelos, se observaron plantas dañadas con moteados to exhibit damage in the form of chlorotic mottle, faint cloróticos, rayados tenues de color amarillo y manchas cloró- yellow stripes and ring-shaped chlorotic and necrotic spots. ticas y necróticas anulares. Hojas dañadas fueron recolectadas Damaged leaves were collected from plants of the genera de plantas de los géneros Brassia, Brassocattleya, Cattleya, Brassia, Brassocattleya, Cattleya, Encyclia, Epidendrum, Encyclia, Epidendrum, Guariathe, Laelia, Oncidium, Shom- Guariathe, Laelia, Oncidium, Shomburghia, Vainilla and burghia, Vainilla y Xilobium. Pruebas de detección serológi- Xilobium. Viral protein serological detection tests (double ca de proteína viral de doble anticuerpo (DAS)-ELISA) fue- antibody sandwich enzyme-linked immunosorbent assays, ron realizadas con antisueros específicos para diversos virus DAS-ELISA) were done with specific antiserums for diverse que afectan a orquídeas. Al menos una planta de cada género viruses that affect orchids. At least one plant of each genus presentó los virus Cymbidium mosaic virus (CymMV; Potex- had Cymbidium mosaic virus (CymMV; Potexvirus) and virus) y Odontoglossum ringspot virus (ORSV; Tobamovirus), Odontoglossum ringspot virus (ORSV; Tobamovirus) in en infecciones individuales o mezcladas. Las plantas de Ency- individual or mixed infections. Encyclia and Laelia plants clia y Laelia estuvieron infectadas con mayor frecuencia con had the highest incidence of infection by both viruses. ambos virus. El patrón electroforético se determinó en geles The electrophoretic pattern of the CymMV genome was de poliacrilamida (PAGE) del genoma del CymMV, con ex- determined in polyacrylamide gels (PAGE) with double chain tractos de ARN viral de doble cadena de origen viral de las viral RNA from the samples that were positive in the DAS- muestras positivas en los ensayos serológicos de DAS-ELISA. ELISA serological assays. Identity of CymMV and ORSV La identidad del CymMV y ORSV se confirmó mediante se- was confirmed by direct sequencing and by cloning products cuenciación directa y por clonación de productos diferentes different from the reverse transcriptase linked to PCR (RT- de la transcriptasa inversa ligada a la PCR (RT-PCR) punto PCR) final point with degenerated oligonucleotides, which final, con oligonucleótidos degenerados, que amplifican dos amplify two consensus regions of the replicase gene (RdRp) regiones consenso del gene de la replicasa (RdRp) del géne- of the genus Potexvirus, and specific oligonucleotides, which ro Potexvirus, y oligonucleotidos específicos, que amplifican amplify a conserved region of the capsid protein gene (CP una región conservada del gen de la proteína de la cápsi- of CymMV and ORSV). Clones of the gene RdRp from de (CP) de CymMV y ORSV. Clones del gen RdRp de tres three Laelia plants (GenBank access numbers HQ393958, HQ393959, HQ393960, HQ393961 and HQ393962), of the CP gene of CymMV from two Oncydium plants (GenBank access numbers HQ393956 and HQ393957), and from three Encyclia plants (GenBank access numbers HQ393953, * Autor responsable v Author for correspondence. Recibido: julio, 2013. Aprobado: julio, 2014. HQ393954 and HQ393955), were obtained and sequenced. Publicado como ARTÍCULO en Agrociencia 48: 525-536. 2014. The nucleotide sequences of the capsid protein gene (CP) 525 AGROCIENCIA, 1 de julio - 15 de agosto, 2014 plantas de Laelia (números de acceso Genbank HQ393958, A B HQ393959, HQ393960, HQ393961 y HQ393962), del gen CP de CymMV de dos plantas de Oncydium (números de acceso Genbank HQ393956 y HQ393957) y del gen CP de ORSV de tres plantas de Encyclia (números de acceso Gen- bank HQ393953, HQ393954 y HQ393955), fueron obte- nidos y secuenciados. Las secuencias nucleotídicas del gen de la proteína de la cápside (CP) del CymMV y del CP del ORSV, obtenidos de las muestras de orquídeas que se cultivan en México, mostraron similitud de 96 a 97% con CymMV y de 99 a 100% con ORSV, con secuencias disponibles en el Genbank, lo cual confirmó que los aislados de ambos virus de México son idénticos a los de otras partes del mundo. Palabras clave: Replicasa (RdRp), RT-PCR, ornamentales. C D IntRoduccIón n México se cultivan numerosas especies o híbridos de orquídeas (Orchidaceae; monoco- tiledóneas), nativas o introducidas, para co- Emercializar sus flores (Ramírez, 1996; INEGI, 1998; Dole y Wilkins, 1999). Durante enero y febrero de 2011 en invernaderos comerciales del estado de Morelos, México, se reco- lectaron plantas de géneros diversos de orquídeas, mexicanas e introducidas desde otros países, que mostraron en sus hojas moteados cloróticos (Figu- ra 1A), manchas irregulares cloróticas (Figura 1B), manchas cloróticas con márgenes necróticos (Figura 1C) o manchas irregulares necróticas (Figura 1D). Figura 1. Síntomas observados en orquídeas A) moteados Las plantas con estos daños reducen su vida útil y la cloróticos, B) manchas irregulares cloróticas, C) calidad de las flores. anillos cloróticos con márgenes necróticos y D) Análisis fitopatológicos del material recolectado manchas irregulares necróticas. no mostraron la presencia de microorganismos con Figure 1. Symptoms observed in orchids: A) chlorotic los que se pudiera relacionar los daños. Por lo tanto, mottle, B) irregular chlorotic spots, C) chlorotic rings with necrotic edges, and D) irregular necrotic se consideró la hipótesis de que los daños observados spots. son causados por virus, los cuales son patógenos co- munes en los centros grandes de producción de or- quídeas comerciales en el mundo y causan pérdidas of CymMV and of the ORSV CP, obtained from samples económicas altas (Rees, 1992; Albouy y Devergne, of orchids cultivated in México, were 96 to 97 % similar to 2000; La Croix, 2008). La información de la identidad de los virus que CymMV and 99 to 100 % to ORSV, with sequences available infectan a las orquídeas en cultivo comercial en Méxi- in the GenBank, confirming that both viruses isolated in co parece inexistente. Por lo tanto, el objetivo de este México are identical to those found in other parts of the estudio fue identificar a los virus relacionados con los world. daños observados en diferentes géneros de orquídeas que se comercializan en México. Key words: Replicase (RdRp), RT-PCR, ornamentals. 526 VOLUMEN 48, NÚMERO 5 DETECCIÓN DE CYMBIDIUM MOSAIC VIRUS (CymMV) Y ODONTOGLOSSUM RINGSPOT VIRUS (ORSV) EN ORQUIDEAS EN MÉXICO mAteRIAles y métodos IntRoductIon Recolecta de muestras umerous orchid (Orchidaceae; monocoty- ledons) species or hybrids, native or Tres hojas se recolectaron de una o varias plantas de orquí- introduced, are cultivated in Mexico for deas, que manifestaban daños de probable origen viral, de los Ncommercialization of the flowers (Ramírez, 1996; siguientes géneros o sus híbridos (número de plantas indicado): INEGI, 1998; Dole and Wilkins, 1999). Brassia (1), Brassocattleya (1), Cattleya (2), Encyclia (6), Epiden- During January and February 2011, plants of drum (2), Guariathe (1), Laelia (3), Oncidium (5), Shomburgkia several orchid genera, Mexican and introduced (2), Vainilla (1) y Xylobium (1). Todas las plantas se cultivaban en from other countries, were collected. These plants invernaderos comerciales de Morelos. Las muestras se colocaron exhibited chlorotic mottle (Figure 1A), irregular en bolsas plásticas y se transportaron al Laboratorio de Micro- chlorotic spots (Figure 1B), chlorotic spots with biología de la UBIPRO de la Facultad de Estudios Superiores, necrotic edges (Figure 1C) or irregular necrotic spots Iztacala, de la Universidad Nacional Autónoma de México, para (Figure 1D). Plants with this damage have a shorter la detección serológica e identificación molecular con ácidos nu- useful life and lower quality of flowers. cleicos de origen viral (Dijkstra y De Jager, 1998). Phytopathological analyses of the collected material did not show presence of microorganisms Detección serológica de virus that might be related to the damage. Therefore, it was por ensayo inmunológico ligado a enzimas (DAS-ELISA) hypothesized that
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