Signs and Symptoms
Symptoms seen on plants infected with this virus can vary depending on the plant. However typical symptoms include vein clearing, mottling, and necrotic lines or etching. Symptoms can occur on leaves and fruit and the plants can become stunted. (See this reference for pictures of symptoms and inclusions.)
Like other potyviruses, TEV makes viral inclusions that can be seen in the light microscope if properly stained. . This particular potyvirus makes two kinds of inclusions that can be diagnostic in a known host. One of the inclusions is the cylindrical inclusions found in the cytoplasm of infected cells and the second inclusion is found in the nucleus. Neither inclusion type stains in the nucleic acid stain (AzureA).
Inclusions of Tobacco etch virus (in various hosts).
Read more about this topic: Tobacco Etch Virus
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