Fig. 1 High-pressure frozen/freeze-substituted Arabidopsis root and cotyledon samples. (a) Epidermal root
cells in root tips from 1-week-old seedlings grown on agar plates. (b–e) Cotyledon mesophyll cells from
1-week-old seedlings grown in liquid medium. Chl chloroplast, G Golgi stack, M mitochondria, MVE multivesicular endosome. Arrowheads in (e) indicate protein complexes in thylakoid membranes within chloroplasts. V vacuole. Scale bars ¼ 500 nm in (a), 2 μm in (b), 400 nm in (c, d), 400 nm in (e)
cells in root tips from 1-week-old seedlings grown on agar plates. (b–e) Cotyledon mesophyll cells from
1-week-old seedlings grown in liquid medium. Chl chloroplast, G Golgi stack, M mitochondria, MVE multivesicular endosome. Arrowheads in (e) indicate protein complexes in thylakoid membranes within chloroplasts. V vacuole. Scale bars ¼ 500 nm in (a), 2 μm in (b), 400 nm in (c, d), 400 nm in (e)