Fulfilling Koch's postulates for Abutilon mosaic virus

Cloned Abutilon mosaic geminivirus (AbMV) has been re-transmitted to Abutil on sellovianum (syn. striatum) plants by a two-step combined agroinfection/ grafting method. The symptoms induced were indistinguishable from the chara cteristic mosaic of ornamental Abutilon plants. Therefore, we can exclude c hat a mixture of different AbMV variants is responsible for the striking va riety of Abutilon leaf pattern elements. Analysis of the symptoms on consec utively infected leaves suggests that mosaic formation depends on routing a nd timing of super-imposed virus waves.