Tomato bushy stunt virus. Coloured transmission electron micrograph (TEM) of virus particles (virions) of the tomato bushy stunt virus (TBSV). This plant virus is a tombusvirus, and has an RNA (ribonucleic acid) genome. It was first identified in 1935 in the tomato plant (Lycopersicon esculentum), a plant cultivated for its fruit. This virus also infects bell pepper, potato, tulip, apple and pear plants. Symptoms are bushy plant growth with fewer and smaller fruits. The virus is transmitted by seeds and possibly by pollen. Magnification: x125,000 when printed 10cm high.