Fig. 1From: Elucidation of molecular and hormonal background of early growth cessation and endodormancy induction in two contrasting Populus hybrid cultivarsShoot length increments (cm*week1) in the Okanese (circle) and Walker (triangle) cultivars under SD conditions (12/12 h, light/dark period) at 18/3 °C temperature during the first 30 days, then 10/14 h for an additional 30 days. Error bars represent the ±SEM. N = 27. The values indicated by different letters are significantly different at P < 0.05 level from each otherBack to article page