Table 1.

Results of three-way (species × protoxylem group × treatment) factorial ANOVA of root morphological and anatomical traits.

	df	Root length	Root diameter	Root stele diameter	Conduit diameter	Conduit number	Hydraulic conductivity
Species	2	<0.001	<0.001	<0.001	<0.001	0.008	<0.001
Protoxylem group	6	<0.001	<0.001	<0.001	<0.001	<0.001	<0.001
Treatment	1	<0.001	0.515	0.647	0.048	0.121	0.008
Species × Protoxylem group	12	<0.001	0.007	0.016	0.034	0.296	<0.001
Species × Treatment	2	0.565	0.076	0.012	<0.001	<0.001	<0.001
Protoxylem group × Treatment	6	<0.001	0.321	0.071	0.799	0.597	0.002
Species × Protoxylem group × Treatment	12	0.417	0.266	0.021	0.939	0.011	0.127

Values in bold type indicate significant effects.