Table 1.

Root hair density and root fungal colonization of Posidonia oceanica seedlings and adults in Subset 1.

Sample	Root hair density (number mm−1)	Total fungal colonization (%)	Surface hyphae (%)	Intraradical hyphae (%)	Microsclerotia (%)
Generalized linear model	P = 4.18 ∗ 10−7	P = 4.17 ∗ 10−7	P = 4.85 ∗ 10−7	P = 9.03 ∗ 10−4	P = 0.019
young seedlings (n = 30)	33.4 ± 4.9 a	0 a	0 a	0 a	0 a
established seedlings (30)	15.7 ± 3.4 a	37 ± 5.8 b	34 ± 5.4 b	9 ± 2.8 b	7 ± 2.6 b
adult plants (30)	0.00 b	33 ± 4.3 b	25 ± 3.7 b	7 ± 1.3 b	12 ± 3.5 b

Mean values of root hair density and root fungal colonization (total colonization, colonization by surface hyphae, intraradical hyphae and intracellular microsclerotia) ± SE are given. Significance of the influence of the ontogenetic phase as well as differences between the samples were evaluated and grouped according to the Generalized Linear Model with Gaussian error structure and identity link function. (different letters indicate significantly different groups). For more details see Materials and Methods.