Species | Production typey | Humectant | Fv/Fmx | ϕPSIIw | Pnv (μmol/m2/s) | Tsu (mol/m2/s) | rst (m2/s/mol) | XWPs (MPa) |
---|---|---|---|---|---|---|---|---|
Red maple | PPS | 0 (control) | 0.774a | 0.077ns | 0.97ab | 0.20ns | 122.0ns | −2.57a |
HydES | 0.785a | 0.070 | 2.80a | 0.41 | 102.7 | −1.17b | ||
EcoS | 0.611b | 0.051 | 0.50b | 0.11 | 223.1 | −2.00ab | ||
BRS | 0 (control) | 0.675ns | 0.083ns | 0.25ns | 0.09ns | 213.8a | −3.74a | |
HydES | 0.756 | 0.128 | 1.27 | 0.24 | 81.6b | −1.77b | ||
EcoS | 0.724 | 0.070 | 0.95 | 0.19 | 105.4b | −2.28ab | ||
River birch | BRS | 0 (control) | 0.724ns | 0.104ns | 0.50ns | 0.05ns | 295.1ns | −1.53ns |
HydES | 0.756 | 0.076 | 0.73 | 0.09 | 147.0 | −1.41 | ||
EcoS | 0.752 | 0.056 | 1.01 | 0.13 | 168.2 | −1.72 |
↵zSeedlings grown in a greenhouse in 3.8 L plastic pots filled with soilless substrate (Metromix 560) and treated with 16 mL/L HydES or EcoS prior to withholding water. Each value represents the mean of six replications. For each species and production type, values in the same column differ significantly when followed by a different letter, Tukey 0.05; ns = no significant differences.
↵yPeat plug-grown (PPS) seedlings; bare root-grown (BRS) seedlings.
↵xVariable/maximum fluorescence (max efficiency of PSII photochemistry).
↵wQuantum yield of PSII.
↵vPhotosynthetic rate.
↵uTranspiration rate
↵tStomatal resistance.
↵sXylem water potential.