Additional file 1.

Transmission electron micrograph of vegetative Bryopsis thallus in longisection. Figure A: the outer cytoplasmic layer (ol) adjacent to the Bryopsis cell wall (cw) contains most of the organelles excluding only the chloroplasts (chl), which are present in the inner layer next to the central vacuole (cv). Magnification: × 8000, Scale bar: 3 μm. Figure B (detail of Figure A): besides mitochondria (m), endoplasmic reticulum and vacuolar evaginations (v), endogenous bacteria (ba) are present in the outer cytoplasmic layer. Magnification: × 25000, Scale bar: 1 μm.

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Hollants et al. BMC Microbiology 2011 11:255   doi:10.1186/1471-2180-11-255