Abstract:The promoter SAR by combining mini-35S promoter (-62 to +1) and several pathogen responsive cis-acting elements derived from defense genes in plant was synthesized, and the expression pattern of these synthetic promoters was studied by using report gene GUS (β-glucuronidase) transformed into Arabidopsis. The results showed that synthetic promoter SAR could make GUS predominant expression in cotyledon, trichome, rhizome conjoit region, root system and old leaves, and the expression in old leaves was higher than that in young leaves. It suggested that SAR promoter had tissue and development specific expression.