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Susceptibility of Arabidopsis Ecotypes to Infection by Iris yellow spot virus

K. Naveed and H. R. Pappu

July 2012


Iris yellow spot virus (IYSV) 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. Tomato spotted wilt virus, the type member of the genus Tospovirus, can infect Arabidopsis. To investigate if Arabidopsis could be used as a model plant for studying IYSV-host interactions, we evaluated the response of different Arabidopsis ecotypes to IYSV infection in a controlled environment.


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