Constructs used for transformation of tobacco plants. p35S, 800-bp 35S promoter of the cauliflower mosaic virus recovered from pBI221; TP, sequence from pST5 encoding the ICDH targeting peptide; MP, sequence encoding the first 38 amino acids of mature ICDH protein; GFP, sequence encoding a modified GFP; Nos ter, nopaline synthetase terminator.