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Fig. 3. The extent of the adaxial domain determines leaflet placement in compound
leaves. (A-C) Scanning electron micrographs of vegetative apices. The adaxial
domain has been colored pink. (D-F) Mature leaf form. (A) In the developing
leaf blade of wild-type tomato, the adaxial domain extends from the base to
the tip. (D) The mature tomato leaf has leaflets arranged along the edge of
the adaxial domain. (B) The adaxial domain of transgenic antisense
PHAN tomato plants is reduced to the tip of the leaf primordium, and
these plants often produce cup shaped leaves (E). (C) The adaxial domain of
Schefflera actinophylla is restricted to the tip of the developing
leaf. (F) Consequently, leaflets are restricted to the tip of the petiole in
this plant. m, meristem; P1, P2, P3 and P4, primordia 1, 2, 3 and 4,
respectively. Asterisks indicate developing leaflets; red asterisk denotes
region forming cup-shaped blade in antisense PHAN tomato plant.
Figure adapted, with permission, from Kim et al. (Kim et al., 2003).
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