Abstract
Phenol extracts from leaf tissues systemically infected with 6 strains of cucumber mosaic virus (CMV) and two isolates of tomato aspermy virus (TAV) showed higher infectivity than that of control phosphate buffer-homogenate, respectively. Difference in kind of assay host has no influence on the higher infectivity of phenol extracts. Phenol extracts from tobacco top leaves infected with CMV-O made at different dates after inoculation indicated always higher infectivity than that of control.
The property that phenol extracts show higher infectivity than usual homogenate seems to be available for one of the criteria in diagnosis or identification of CMV. The higher infectivity of phenol extracts from infected tissues of TAV and chrysanthemum mild mottle virus may be regarded as an additional property which suggests close relationship between CMV and TAV.
