Cassette for nucleic acid expression in plants

The present invention relates to the expression of recombinant nucleic acids in plants. More specifically the invention provides a promoter for the selective expression of genes in stomatal guard cells, gene constructs containing said promoter, expression vectors thereof and plants transformed therewith. The selective expression of genes in stomatal guard cells allows the regulation of their opening/closing states thereby modulating, e.g. increasing, the plant ability to resist to adverse environmental or climatic conditions