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SEM of the ventral side of seeds. (A) ‘Clark-i’. The micropyle is open (arrow) and the hilum fissure is slightly open (asterisk). (B) Closed micropyle in ‘OX 951’. (C) Raphe in ‘OX 951’, marked by arrows. (D) Raphe in ‘Clark-i’ slightly open (arrows). Scale bars: A, C and D = 200 µm; B = 50 µm.
