Abstract: The invention relates to a nucleic acid and the encoded plant resistance protein which upon tobamovirus infection interacts with the 30K tobamovirus movement protein to protect the plant against the spread of the infection. Simultaneous expression of the resistance protein and a 30K movement protein, wherein expression of at least one of them is controlled by a pathogen-inducible promoter, can be used in a general method of protecting plants from the spread of a pathogen infection.

Abstract: The invention relates to a process for the incorporation of foreign DNA into the genome of dicotyledonous plants by infecting the plants or incubating plant protoplasts with Agrobacterium tumefaciens bacteria, which contain one or more Ti (tumour inducing) plasmids, wherein as Ti plasmid a stable cointegrate plasmid composed of the plasmid R772 and the plasmid pTiB6 with foreign DNA incorporated in the T-region of the Ti component of the cointegrate plasmid is applied as well as to a cointegrate plasmid pAL969 and cointegrate plasmids derived from the cointegrate plasmid by the incorporation of foreign DNA into the T-region of the Ti component.