Figure 1.

Effects of the addition of S. chamaejasme root exudate (SRE) and inoculation without (AM−) and with (AM+) arbuscular mycorrhizal fungi (AMF) on (a) ramet number, (b) total rhizome length, (c) aboveground biomass, (d) underground biomass, (e) the content of shoot total nitrogen (TN), (f) the contene of root TN of L. chinensis. Values were means ± SE from eight repeat samples. Different capital letters, or lowercase letters indicate significant differences (p < 0.05, LSD) among the three SRE concentrations and CK within AM− or AM+ treatment, respectively. ns = no significance. SRE₀, SRE₅, and SRE₂₀ represented the original solution, five-fold dilution, and twenty-fold dilution of S. chamaejasme root exudates. The mass concentration within these three SRE treatments was 0.1 g/mL, 0.02 g/mL, and 0.005 g/mL, respectively.