Fig. 5From: Autophagy counteracts instantaneous cell death during seasonal senescence of the fine roots and leaves in Populus trichocarpaChanges in ultrastructure of cortical parenchyma cells in fine roots during the course of senescence. a-c - white fine roots - control (RC); d-i - two stages of senescing roots - light brown roots (RS1, d-f) and dark brown roots (RS2, g-i). Abbreviations: V vacuole, ER endoplasmic reticulum, M mitochondria, T tannins, Mi microorganism. Arrows indicate autophagy-related structures. Bars, 0,5 μmBack to article page