Fig. 3From: Optimal seed water content and storage temperature for preservation of Populus nigra L. germplasmEffect of seed drying: slow (3 days) and fast (1 h) at 20 °C on the germination of P. nigra seeds after storage (0, 3, 6, 9, 12, 18 and 24 months). Seed WC was at 0.07 g H2O g−1 dry mass. Means with the same letters are not significantly different (P < 0.05). Seeds were collected in 2010Back to article page