Arabis mosaic virus. Coloured transmission electron micrograph (TEM) of virus particles (virions) of the arabis mosaic virus (ArMV). This plant virus is a nepovirus, and has an RNA (ribonucleic acid) genome. It was first identified in 1944 in Arabis hirsuta, a flowering plant in the cabbage family. This virus also infects a wide range of other plants, including beet, carrot, buttercup, tulip, rose, and jasmine plants. Symptoms include a range of lesions and sometimes tissue death. The virus is transmitted by several parasitic Xiphinema species of nematode roundworms. Magnification: x125,000 when printed 10cm high.