Fig. 4From: Autophagy counteracts instantaneous cell death during seasonal senescence of the fine roots and leaves in Populus trichocarpaChanges in the structure of fine roots and leaves in relationship to the senescence process. a – Number of cortical parenchyma cells per section of fine roots. b – Changes in the diameter of roots and the stele during senescence. c – Width of the palisade mesophyll in leaves of P. trichocarpa. d – Width of the leaf lamina in P. trichocarpa. Bars sharing the same letter are not significantly different (P = 0,05). Values represent the mean ± SE (standard error)Back to article page