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Fig. 4. RNA in situ hybridisation of selected genes during wild-type floral
development. (A,B) At4g21590. The arrows show expression in the centre of a
stage 3 bud (A), and later in developing stamens (B). (C) At1g13400. Arrows
indicate expression in emerging stamen primordia (st), and in the placental
region in early carpels (ca). (D,E) At3g17010. Expression in emerging stamen
primordia (st) is indicated in D; arrows in E indicate expression in the
sporogenous tissue of stamens (st) and in the placental region of carpels
(ca). (F) Expression of GA4 in stamen filaments (arrow). (G,H) Expression of
ATH1 in developing stamens (st). For better contrast, the sections in
A, B, G and H were photographed in aqueous medium, before the tissues were
permanently mounted.
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