Leaf sap contains few virions. PEG and column chromatography. Physical properties One sedimenting component in purified preparations. Replication Replication does not depend on a helper virus. Inclusions absent from infected cells.
Mitochondria become filiform.
Ind. J. Mycol. Thesis , G.B. Pant. Tech., Pantnagar, Nainital, U.P. India. G. B. Pant.