Occurrence of Cucumber mosaic virus in Gerbera jamesonii in India

Plant Disease
N VermaA A Zaidi

Abstract

Gerbera jamesonii (family Asteraceae) is a popular perennial ornamental cut flower and potted plant with considerable economic importance. In a survey of gerbera grown in floriculture fields at the Institute of Himalayan Bioresource Technology (IHBT), Palampur and nearby nurseries, color break symptoms on the petals, asymmetrical ray florets, and deformed flowers were observed during 2003-2004. The virus evoked chlorotic local lesions on Chenopodium album, C. amaranticolor, and C. quinoa, while systemic mosaic was observed on Cucumis sativus, Nicotiana benthamiana, N. clevelandii, N. glutinosa, and N. tabacum cv. Samsun. The virus was transmitted nonpersistently by Myzus persicae and Aphis gossypii and was identified as Cucumber mosaic virus (CMV) using enzyme-linked immunosorbent assay (ELISA) with CMV-specific antibodies (Agdia, Elkhart, IN). Polyhedral particles approximately 29 nm were observed with electron microscopy of leaf dips from symptomatic gerbera leaves. Total RNA was isolated from the infected gerbera plants and N. glutinosa by using RNAqueous (Ambion, Austin, TX). CMV-specific primers (1) were used to detect the virus with reverse transcription-polymerase chain reaction that produced an amplicon predicted size o...Continue Reading

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