. 2017 Oct 19;9(6):plx054. doi: 10.1093/aobpla/plx054

Table 4.

Treatment effect on xylem lignification (L-values). Linear models for treatment (warm vs. cold) and distance from root apex (nested design; model for each species).

Species	Factor	Estimate	SE	t value	P value
Rumex	Intercept	0.21	0.03	6.6	<0.001
	Treatment	0.12	0.02	2.9	<0.01
	Distance (treatment)	0.01	0.01	3.4	<0.01
R ² = 0.46
Ranuculus	Intercept	0.35	0.07	5.1	<0.001
	Treatment	0.25	0.05	4.3	0.076
	Distance (treatment)	0.02	0.01	2.7	0.014
R ² = 0.27
Tussilago	Intercept	0.29	0.07	4.3	<0.001
	Treatment	0.04	0.05	0	<0.001
	Distance (treatment)	0.02	0.01	2.8	0.011
R ² = 0.57
Poa	Intercept	0.46	0.06	8.4	<0.001
	Treatment	0.26	0.04	3.7	<0.001
	Distance (treatment)	0.02	0.01	3.2	<0.01
R ² = 0.46