Fig. 3

Isolation of endophytic bacteria at different growth stages of winter wheat plants. (A) The concentric rings in the doughnut chart display, from the inside to the outside, the proportions of the endophytic bacterial taxa isolated at the tillering, jointing, heading and seed-filling stages, respectively. (B) A Venn diagram showing the distribution of the 22 bacterial taxa among the different wheat growth stages. The online tool used to calculate and draw the Venn diagram was from http://bioinformatics.psb.ugent.be/webtools/Venn/