Fig. 4
From: Comparative studies of the response of larch and birch seedlings from two origins to water deficit
Morphological indexes of four species treated by two water treatments. a: Total leaf area (cm2), b: Shoot height (cm), c: Root collar diameter (mm), d: Total root area (cm2). PL: Prince Rupprecht’s larch, EL: eastern larch, WB: white birch, PB: paper birch, WW: well-watered seedlings shown by open bars, LW: low-watered seedlings shown by shaded bars. Asterisks above bars indicate significant difference between the two treatments, *difference at P < 0.05, **difference at P < 0.01