Seasonal patterns of thermal acclimation-related traits of two geographically distant white spruce seed sources during the 2016 growing season in the Watford plantation site. Values are mean ± s.d, n = 6. Values for July are not included in the anlaysis because they are from other seedlings (those used for A–Ci curve measurements). Means having the same letters are not significantly different α = 0.05. For abbreviations see legend of Fig. 4.