Some anatomical aspects of plant virus disease problems

Transmission of Viroids and Viruses by Tissue Implantation and Transport across the Callus Barrier

“…There are many differences between tissue implantation technique and grafting as methods of plant inoculation with viruses. In graft unions the cells of the scions and of the stocks are both active in the process of callus formation (ESAU 1948, ROBERTS 1949 while the implants are not active at all, probably because of the extremely low level of growth regulating substances in their cells. One of the great advantages of the grafting as a method of inoculation with viruses is a possibility of a direct introduction of viruses to the transporting system of plants (ZAITLIN 1962) but the vascular connections of the implants with stem cells are not formed or are formed very lately.…”

Electron Microscopic and Histopathological Studies of the First Viral Infection Reported in <i>Ipomoea Cairica</i> (L.) Sweet

“…The virus reacts with different attributes of the host plant which result certain phenotypic and histological changes in plants such as leaf curling, narrowing of leaves, yellowing of leaves, stunted growth etc., the sample with reference to these symptoms were sectioned using Microtome and visualized under Light Microscope [11][12][13][14][15].…”