Fig. 1.

Mean (±s.d.) embryo length on different occasions, and cumulative root protrusion and shoot emergence of Viburnum tinus fruits subjected to annual temperature cycles starting at a winter (5 °C) or summer (25/15 °C) regime. The fruits were treated in two ways before the start of the experiment: the entire pericarp was removed (seeds) or the pulp was removed (stones). In each annual cycle, 200 seeds or stones were used. Embryo lengths were measured in viable fruits remaining in an embryonic stage.