Abstract
Iris yellow spot virus (IYSV; genus Tospovirus, family Bunyaviridae) is a serious constraint for onion production in the United States and several other parts of the world. A few experimental indicator hosts were reported for IYSV but there is no report of infection of Arabidopsis by IYSV. Establishing IYSV infection in onion by mechanical inoculation has so far proven to be inefficient resulting in numerous escapes. Using Arabidopsis thaliana as a host for studies on the biology and tospovirus-host interactions has an advantage of the plant's small genome size, short life cycle, and a genome that has been sequenced. Several ecotypes were evaluated for their susceptibility to IYSV and identified some where IYSV produces localized infection. Together with wild type and various mutants, the IYSV-Arabidopsis system could be useful for studying host-tospovirus interactions. Accepted for publication 12 June 2012. Published 14 July 2012.
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