Fig. 9 in In situ experiments on the effect of low pH on the ultrastructure of the seagrasses Cymodocea nodosa and Posidonia oceanica Abstract

Fig. 9: A-F. TEM micrographs of young epidermal cells of P. oceanica after three weeks transfer at S2 area. A. Group of epidermal cells that appear distorted, with wavy cell walls. B. Part of an epidermal cell with a central nucleus with disorganized nuclear membrane. The nucleus is surrounded by remnants of cell organelles and an electron-dense ER network. C. Chloroplasts with remnants of thylakoids and plastoglobuli, and disorganized mitochondria. Both appear empty and destroyed. D. Starch grains from disorganized chloroplasts appear dispersed in the cytoplasm. E. Cytoplasmic area with structures of ER network connected and/or filled with electron-dense material. F. Higher magnification of inflated, swollen RER cisternae, filled with electron-dense material. Scale bars = 2 μm (A), 1μm (B) 0.2 (C, D, E,) and 0.1 (F).