Figure 6

Allometric plots. Root mass vs. plant size

(A and B) and root:shoot ratio vs. plant size (C and D) of H. ammodendron and H. persicum under different environment gradients. The coefficients of the straight line are reported together with the adjusted R² and the P value. Different symbols represent data reproduced from different references (see detail in Table S1 in Appendix A6). ■ represents plants in precipitation treatments (no precipitation/natural precipitation/double precipitation)⁴⁶; ♦ represents plants in soil texture treatments⁴⁴; ▲ represents plants in sodium chloride (NaCl), polyethylene glycol-6000, temperature and light⁴³; ○ represents data from our field experiment and + and × represent data from our competitive experiment (see detail in Materials and methods).