Table II. Best predictors of seasonal variation for LT50 and 16-kD dehydrin in P. strobus needles determined by linear mixed-effects modeling

P value, P value of difference between predictor model and null model; Tmin, minimum daily temperature; Tmean, mean daily temperature. AIC scores are provided to indicate goodness-of-fit for each predictor model; higher ΔAIC scores indicate higher goodness-of-fit.

RankPredictorAICΔAICP value
Null model508.60
 Full modelPhotoperiod × Tmin241.03267.57<0.001
Dehydrin,16 kD
Null model120.35
 Full modelPhotoperiod × Tmin47.9272.42<0.001