Rosa multiflora R-24 CK  (DGE)
We subculture the 13th multiflora (resistant) and the 13th (susceptible) materials until the seedlings grow to 6-10 leaves,one group feed with powdery mildew as the experimental group, while another feed with sterile water as a control group. Take the experimental group and the control group treated 24 h, 96 h, with the quick-frozen in liquid nitrogen and stored at -70 ℃ placed. A part of the sample do gene expression profiles digitally (Digital Gene Expression Profile, DGE) analysis by the Shanghai Jing Bio companies .