Botany online 1996-2004. No further update, only historical document of botanical science!

Necrotic lesions (primary infection) on TMV-infected tobacco leaves
(Nicotiana tabacum var. Xanthi)

The formation of necrotic lesions is a reaction of the plant towards virus infection. When infected with the wild-type all necrotic lesions on one leaf are of about the same size. (a). After treatment of the virus with a mutagen a number of mutants arise. Their distribution capacity in the leaf tissue often is reduced, The necrotic lesions differ therefore in size, in general they are much smaller than wild-type induced lesions (b). (H. G.WITTMANN,1962).

© Peter v. Sengbusch - Impressum