Fig. 6From: Autophagy counteracts instantaneous cell death during seasonal senescence of the fine roots and leaves in Populus trichocarpaChanges in ultrastructure of palisade and spongy mesophyll leaf cells during the course of senescence. a-c - green leaves - control (LC); d-i - two stages of senescing leaves - yellowing leaves (LS1, d-f) and yellow leaves (LS2, g-i) Abbreviations: V vacuole, S starch, M mitochondria, RCB Rubisco containing bodies, G gerontoplast, Ch chloroplast. Arrows indicate autophagy-related structures. Bars, 1 μmBack to article page