 To elucidate heterologous promoter function in gymnosperms, we introduced the bean phenylalanine ammonia-lyase-beta-glucuronidase (PAL2-GUS) gene fusion into white pine (Pinus strobus L.).     ///    "However, pretreatment of suspension cultures with SA or JA enhanced the induction of PAL2-GUS expression by UV irradiation. "