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Seed coat transverse sections from extrahilar region stained with DMACA for proanthocyanidins polyphenolics (bar = 50 μm): Upper row—JI92, Lower row—JI64. Blue excited red fluorescence of DMACA (a,d) and violet coloration in bright field (b,e). Similar sections as in (c,f) but stained with DMACA after mild alkaline hydrolysis; scale bars = 50 μm. *, Light line.
