Low intra-tree variability in resistance to embolism in four Pinaceae species

Table 3 Effect of azimuth, whorl/height, and azimuth × whorl/height for embolism resistance of branches (P _50Branch), trunks (P _50Trunk), and roots (P _50Root) of P. pinaster and P. menziesii (p value <0.05), was assessed with a Wilcoxon-Mann-Whitney test

	Variable	P _50Branch		P _50Trunk		P _50Root
	Variable	p value	n	p value	n	p value	n
P. pinaster
Azimuth		0.0944	100	0.7048	80	0.8615	14
Whorl/height		0.2073	100	0.7158	80	–
Azimuth × whorl/height		0.5738	100	0.7708	80	–
P. menziesii
Azimuth		0.8946	80	0.0880	60	0.4595	9
Whorl/height		0.2414	80	0.2646	60	–
Azimuth × whorl/height		0.3663	80	0.0670	60	–

For roots, only the azimuth effect was taken into account (see experimental design, Fig. 1)

ISSN: 1297-966X