RESUMO
A SAP - transmissible virus obtained from naturally infected Nicotiana glauca plants in Egypt induced mosaic mottling, distortion and other abnormalities in leaves of this species. N. repanda, N. tabacum [several cultivars and varieties] and Petunia hybrids were infected systemically. Local lesions, but not systemic infection, were induced in N. glutinosa and several other solanaceous species, and in Plantago major and Sonchus oleraceus. In tobacco sap, the virus had a thermal inactivation point [10 min] of 7g, and dilution endpiont of 1: 8 x l05; its longevity in vitro at 20 - 33§ was more than 31 months. The virus induced the formation of cytoplasmic inclusions consisting of crystalline plates in leaf hair and epidermal cells of N. tahacum. Its rod-shaped particles were typical of tobamoviruses and were serologically closely related to those of tobacco mosaic, tomato mosaic, ribgrass mosaic and odontoglossum ringspot viruses. Its detailed affinities have still to be considered