FIGURE 2.

Water retention curves of non-mycorrhizal (black line) pots and of pots inoculated with R. irregulare (red line) for intra- (WT/WT; RMC/RMC) and inter-genotypic (WT/RMC) plant combinations from field capacity (FC) to the permanent wilting point (PWP). Θ and Ψ_S denote the volumetric water content and the substrate water potential, respectively. Means (n = 4; ± SE) are shown, deriving from individual pot specific fits. There was a significant mycorrhizal effect at Θ_100kPa (P = 0.016) and Θ_1500kPa (P = 0.015). Marginal significances were observed for Θ_10kPa (P = 0.054) and Θ_300kPa (P = 0.096). Significant differences between planting combinations or factor interaction were not detected (two way ANOVA, α = 0.05, n = 4).