Fig 4 -

Fine root length (A, B), surface-area (C, D), tip-number (E, F), and biomass (G, H) in birch (Betula Platyphylla) and larch (Larix olgensis) seedlings subjected to heterogeneous or homogeneous nutrient patterns (left) or in drought vs well-watered conditions (right). Bars indicate standard deviations. Different letters indicate significant difference of raw transformed data (see S1 Table) according to Duncan test at 0.05 level. Lower case letters stand for differences for birch seedlings and capital letters for larch seedlings.