ISSN 2756-3847
International Journal of Plant Breeding and Genetics ISSN 5756-2148 Vol. 4 (5), pp. 271-276, May, 2017. © International Scholars Journals
Full Length Research Paper
Natural incidence and infectivity level of three nepoviruses in ornamental crops in Iran
T. Ghotbi and N. Shahraeen*
Department of Plant Virus Research, Iranian Research Institute for Plant Protection (IRIPP), Agricultural Research and Education Organization, Tehran, Iran.
*Corresponding author. E-mail: [email protected]
Accepted 22 April, 2009
Abstract
Damage to ornamental crops by nepoviruses has occurred sporadically in Iran in the past. However, since 2006, outbreaks of nepoviruses have been recorded every year. The most affected ornamental crops were surveyed in two main cultivation areas in provinces of Markazi (Mahallat) and Tehran in 2006 - 2007. In all, 420 samples (with or without any conspicuous virus symptoms) were collected and analyzed by double- antibody sandwich enzyme-linked immunosorbent assay (DAS-ELISA) with polyclonal antibody to Tomato ring spot virus (ToRSV), Tobacco ring spot virus (TRSV) and Arabis mosaic virus (ArMV) . These viruses frequently were detected in samples of many different ornamentals (33 species) and often in mixed infections. Where as 8 samples found to be infected by one virus, 3 samples double infection and 6 samples were mix infected by three viruses. ArMV, ToRSV and TRSV were mechanically transmitted to Vigna unguiculata, Nicotiana tabacum, Chenopodium amaranticolor, C. quinoa, Petunia hybrida, Datura stramonium and D. metel indicator host plants and virus recovery was rechecked by ELISA. Of the total of 420 samples tested, 106 samples were reacted with the above virus antiserum. In Tehran, ToRSV was identified in 19 samples (4.52%), TRSV in 7 samples (1.66%), and ArMV in 5 samples (1.19%). In Markazi province, ToRSV was identified in 20 samples (4.76%), TRSV in 20 samples (4.76%), and ArMV in 23 samples (5.47%). In all, TRSV was shown to be prevalent nepovirus infecting ornamentals in these regions.
Key words: Tomato ring spot virus, tobacco ring spot virus, arabis mosaic virus, DAS-ELISA.