A method for producing a plant with enhanced resistance to adversary conditions, said method comprising introducing a chimeric gene in said plant cell or plant by transformation, wherein said chimeric gene comprises the following operably linked DNA regions: a) a plant-expressible promoter; b) a DNA region, which when transcribed yields a RNA molecule, wherein said RNA molecule when being translated into a peptide or protein inhibits NAP or ZAP class PARP or both in cells of said plant, wherein said RNA molecule encodes a dominant negative PARP mutant which when expressed in cells of said plant reduces the apparent activity of the PARP protein encoded by an endogenous PARP gene, wherein said dominant negative PARP mutant comprises or consists of a functional DNA binding domain without a catalytic domain or without a functional catalytic domain wherein said dominant negative PARP mutant comprises an amino acid sequence selected from the amino acid sequence of SEQ ID No. 2 from amino acid 1 to 370, the amino acid sequence of SEQ ID No. 4 from amino acid 1 to 159, the amino acid sequence of SEQ ID No. 6 from amino acid 1 to 138, the amino acid sequence of SEQ ID No. 11 from amino acid 1 to 98, or the amino acid sequence of SEQ ID No. 2 from amino acid 1 to 370 wherein the amino acid sequence from amino acid 1 to 88 is replaced by the amino acid sequence of SEQ ID No. 11 from amino acid at position 1 to the amino acid at position 98, or wherein said dominant negative PARP mutant is mutated at the conserved lysine of position 850 of SEQ ID No. 2, position 532 of SEQ ID No. 4 or position 517 of SEQ ID No. 6; and c) a DNA region involved in transcription termination and polyadenylation wherein said adversary condition is selected from stress imposed by treatment with salicylic acid. a) a plant-expressible promoter; b) a DNA region, which when transcribed yields a RNA molecule, wherein said RNA molecule when being translated into a peptide or protein inhibits NAP or ZAP class PARP or both in cells of said plant, wherein said RNA molecule encodes a dominant negative PARP mutant which when expressed in cells of said plant reduces the apparent activity of the PARP protein encoded by an endogenous PARP gene, wherein said dominant negative PARP mutant comprises or consists of a functional DNA binding domain without a catalytic domain or without a functional catalytic domain wherein said dominant negative PARP mutant comprises an amino acid sequence selected from the amino acid sequence of SEQ ID No. 2 from amino acid 1 to 370, the amino acid sequence of SEQ ID No. 4 from amino acid 1 to 159, the amino acid sequence of SEQ ID No. 6 from amino acid 1 to 138, the amino acid sequence of SEQ ID No. 11 from amino acid 1 to 98, or the amino acid sequence of SEQ ID No. 2 from amino acid 1 to 370 wherein the amino acid sequence from amino acid 1 to 88 is replaced by the amino acid sequence of SEQ ID No. 11 from amino acid at position 1 to the amino acid at position 98, or wherein said dominant negative PARP mutant is mutated at the conserved lysine of position 850 of SEQ ID No. 2, position 532 of SEQ ID No. 4 or position 517 of SEQ ID No. 6; and c) a DNA region involved in transcription termination and polyadenylation