In pea (and close relatives within legumes; see Champagne et al., 2007), UN1FOLIATA (UN1), a LEAFY/FLORICAULA ortholog, regulates compound leaf development (Hofer et al., 1997), whereas, in Aquilegia (Ranunculaceae; Ranunculales), FRUITFULL, an APETALA1/FRUITFULL homolog, has been co-opted to promote leaf complexity (Pabon-Mora, 2012).
A conserved molecular framework for compound leaf development.
Compound leaf development and evolution in the legumes.
For instance, both productions in the compound leaf model in Figure 1 represent this form of information transfer, since the type and parameters of the predecessor modules define the successor structures completely.
For example, the productions governing development of the compound leaf in Figure 1 have the form:
The basic outline of a blade, or of all the leaflets combined in a compound leaf
, make up the general shape of a leaf.
Even-pinnate Refers to a compound leaf that has the same number of leaflets on each side of the rachis and lacks a central terminal leaflet.
Odd-pinnate A compound leaf having opposite leaflet pairs and a single, terminal leaflet.
Petiolule The stalk of a leaflet in a compound leaf; attaches to the rachis.