Fig. 2From: Optimal seed water content and storage temperature for preservation of Populus nigra L. germplasmEffect of time of seed storage for 1 and 3 months at 20 °C on the germination of P. nigra seeds (mean of each storage time 0, 1 and 3 months are compared within each temperature). Seed water content (WC) was 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