Leaf-yellowing in combination with corm necrosis in freesia caused by bean yellow mosaic virus: Factors involved in syndrome development

First Report of Freesia sneak virus in Freesia spp. in Korea

“…The flowers are popular used for weddings and make fragrant additions to bouquets and body flowers. Freesias are known to be infected by Bean yellow mosaic virus (BYMV), Freesia mosaic virus (FreMV), Cucumber mosaic virus, Tobacco rattle virus and ophioviruses (Brunt, 1995;Choi et al, 2010;Choi et al, 2013;Derks et al, 1987;Kumar et al, 2009;Vaira et al, 2006). Among the viruses, the genus Ophiovirus consists of Citrus psorosis virus (CPsV), Ranunculus white mottle virus, Tulip mild mottle mosaic virus, Mirafiori lettuce bigvein virus (MiLBVV), Lettuce ring necrosis virus and Freesia sneak virus (FreSV) that is provisionally named (García et al, 1994;Martín et al, 2005;Roggero et al, 2000;Sasaya et al, 2008;Sasaya and Koganezawa, 2006;Vaira et al, 2003;Vaira and Milne, 2008;van der Wilk et al, 2002).…”

“…In particular, it is interesting to determine whether the virus-like particles are responsible for the expression of different symptoms on freesia leaves. BYMV, one of freesia-infecting viruses was demonstrated to cause leaf-yellowing in combination with corm necrosis (Derks et al, 1987). Since virus examination of freesia cultivars in 2011 showed clearly that BYMV was the most common virus in freesia plants in Korea (Choi et al, 2013), total RNA extracts of 20 freesia samples were analyzed for the detection of BYMV by RT-PCR with primers specific to BYMV CP gene (Choi et al, 2013).…”