Fig. 1

Distribution of partial sequences of culturable bacteria from bulk soils and rhizospheres of N. tangutorum and H. ammodendron at fixed sandy land, semi-fixed sandy land and shifting sandy land on the level of genus, and all genera belonged to Actinobacteria, Firmicutes, Proteobacteria and Bacteroidetes. The first letter in the code represents sandy types (A, fixed sandy land; B, semi-fixed sandy land; C, shifting sandy land) and the second letter in the code represents the plant species (C, bulk soil without plant; N, N. tangutorum; H, H. ammodendron)