The localization of
mRNAs in a mature Scots pine seed. (A) Intense CAT expression (blue signal) in the embryo and in the megagametophyte cells surrounding the corrosion cavity. (B) Intense CAT expression in the embryonic cells. (C) Minor CAT expression in the cells in the inner part of the megagametophyte. cc = corrosion cavity, e = embryo, m = megagametophyte. Bars: (B, C) 20 μm and (A) 200 μm.