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Examination of Rhizobium sp. strain SU343 cells by transmission electron microscopy. Cells from broth cultures (A), and cells extracted from peat cultures after 2 (B) and 7 (C) days and 9 months (D) are shown. The arrows indicate representative cells with thickened walls, and PHB granules are marked by asterisks. Bars, 0.5 μm.
