Linear models explaining the vegetative traits of <i>Medicago truncatula</i> as a function of inoculation conditions (inoculated or not with <i>Pseudomonas fluorescens</i> C7R12), CO₂ concentration (ambient, 365 ppm or enriched, 750 ppm), the plant developmental stage (V, Fp and Pf, see

Linear models explaining the vegetative traits of Medicago truncatula as a function of inoculation conditions (inoculated or not with Pseudomonas fluorescens C7R12), CO2 concentration (ambient, 365 ppm or enriched, 750 ppm), the plant developmental stage (V, Fp and Pf, see text) and the experimental replicate (nested factor), excepting for the C/N ratios (C,D) which were measured in the second experiment only for the Fp and Pf stages.