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Mucilage release and seed coat structure of mum4 enhancer lines. (A) Seeds pretreated in EDTA with shaking and stained with ruthenium red. (B) Scanning electron microscopy of dry seeds. (C) Toluidine blue-stained resin sections of 13 DPA seeds. Scale bars: (A) 500 μm, (B) 50 μm, (C) 10 μm.
