ISOLATION AND CHARACTERIZATION OF A CDNA CORRESPONDING TO A STRESS-ACTIVATED CYCLOPHILIN GENE IN SOLANUM-COMMERSONII

A cDNA clone encoding cyclophilin (CyP), was isolated from Solanum com mersonii by utilizing subtractive hybridization. The corresponding gen e was found to be constitutively expressed in S. commersonii leaves. H owever, when the plants were exposed to low temperature, abscisic acid (ABA), drought, and wounding the amount of the cyclophilin mRNA was m arkedly increased. In addition, the gene was shown to be responsive to salicylic acid and pathogen challenge, suggesting a role in several d ifferent stress responses in plants.