Table 2.

p-values of the two-way ANOVA for all measured plant traits, separated for the summer and spring runs. Non-significant p-values (α = 0.05) are given in italics.

		Summer			Spring
	Variable	Treatment	Species	Treatment × Species	Treatment	Species	Treatment × Species
Biomass and Morphology	Height **	<0.001	<0.001	<0.001	<0.001	<0.001	<0.001
	Dry weight shoot	<0.001	<0.001	<0.001	<0.001	<0.001	<0.001
	Dry weight roots	<0.001	<0.001	<0.001	<0.001	<0.001	<0.001
	Total dry weight	<0.001	<0.001	<0.001	<0.001	<0.001	<0.001
	Root to shoot ratio	<0.001	<0.001	<0.001	<0.001	<0.001	<0.001
	SLA	<0.001	<0.001	<0.001	<0.001	<0.001	<0.001
Chlorophyll	Chlorophyll α (mg g−1)	<0.001	<0.001	<0.001	<0.001	<0.001	<0.001
	Chlorophyll β (mg g−1)	<0.001	<0.001	<0.001	<0.001	<0.001	<0.001
	Chl α:β ratio	<0.001	<0.001	<0.001	0.095	<0.001	-
	Carotenoids (mg g−1)	<0.001	<0.001	<0.001	<0.001	<0.001	<0.001
	Fv/Fm	<0.001	<0.001	<0.001	<0.001	<0.001	<0.001
	Pi	<0.001	<0.001	<0.001	0.445	<0.001	-
Photosynthesis	Max. photosynthesis	<0.001	<0.001	-	0.0567	<0.001	-
	Light compensation point	0.060	<0.001	-	<0.001	0.005	-
	Quantum yield for CO2 fixation	<0.001	<0.001	0.006	0.003	<0.001	-
	Dark respiration	0.5223	<0.001	-	<0.001	<0.001	<0.001

** Lactuca was not included in this analysis. -: The variable was removed from the analysis due non statistically significant.