Pinwheels and Crystalline Structures Induced by Atropa Mild Mosaic Virus, a Plant Virus with Particles 925 nm. Long

Atropa mild mosaic virus is transmissible from tobacco to tobacco, both by green peach aphids and by inoculation of sap. It causes mosaic symptoms and has elongated slightly flexuous particles with a modal length of about 925 nm. It induces the formation of pinwheels resembling those elicited by viruses of the potato Y group (potyviruses), and infected cells also contain crystalline structures resembling hexagonal arrays of tubules.