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Effect of different silicon (1.0 mM) and PEG-6000 (20%) treatments on the ultrastructural changes in a chloroplast and b mitochondrion of leaf mesophyll cells in wheat seedlings (Triticum aestivum L. cv. Longchun 8139). a Plate legend: G grana, OG osmophilic granule, S starch, and T stroma thylakoid. Bar 0.5 μm. b Plate legend: C cristae, M matrix, OG osmophilic granule. Bar 0.2 μm
