, Germination percentage (A) and pollen tube growth (B) in Corylus avellana in BK suc (CTRL) or in BK suc acidified to pH 4.2 (CTRL A ) and in BK suc with GO at 100 ?g mL ?1 (GO100)

, Values are reported as means ± 1 st. dev. (n = 450 in A; n = 90 in B) Statistically different groups are marked with different letters for P < 0.05 (two-way ANOVA, Tukey's HSD post-hoc test)

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