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Fig. 2. Effect of ectopic expression of AmMYBML2, AtMYB16 and
PhMYB1 on epidermal cells. (A-D) SEM micrographs of
conical inner epidermal cells of wild-type tobacco petal limb (A), and of
tobacco petals transformed with 2x35S::AmMYBML2 (B),
2x35S::PhMYB1 (C), or 2x35S::AtMYB16 (D). The activity of
each of the three genes causes the inner epidermal petal cells to grow to a
greater length than the wild-type cells. (E,F) Micrographs of
carpel epidermis of wild-type tobacco (E) and of cellular outgrowths on
tobacco carpels transformed with 2x35S::PhMYB1 (F); tobacco carpels
overexpressing AmMYBML2 or AtMYB16 have the same phenotype
(not shown). (G,H) Micrographs of conical inner epidermal cells
of wild-type Arabidopsis thaliana petals (G), and of petals
transformed with 2x35S::AtMYB16 (H), where the cells grew to a
greater length than in wild-type. Scale bars: 20 µm.
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