Plant defensins are small, basic peptides that exhibit antimicrobial activity against a broad range of bacteria and fungi. To date, more than 80 different plant defensin genes from different plant species, such as Arabidopsis, Raphanus are isolated. Because of their three-dimensional folding pattern, they can inhibit the grouth of many fugi without damaging plant. Plant defensins can protect plant seeding and fight against pathogens which attack plant.In this study, we designed a pair of primers 5'-ATGGCTAA...