From central-peripheral to adaxial-abaxial.
Higher plants are constructed of three organs--the stem, the root and the leaf. The stem and the root have two axes, apical-basal and central-peripheral, which cross orthogonally. Leaves develop from the shoot apical meristem as lateral organs that have three different axes, apical-basal, adaxial-abaxial and right-left. Recent data point to the possibility that the adaxial-abaxial axis in the leaf is formed from the central-peripheral axis in the stem.
Tasaka
M
M
Graduate School of Biological Science, Nara Institute of Science and Technology, Ikoma, Nara 630-0101, Japan. m-tasaka@bs.aist-nara.ac.jp
D019684:Magnoliopsida / Q000254:growth & development*; D009024:Morphogenesis; D018515:Plant Leaves / Q000254:growth & development*; D018547:Plant Stems / Q000254:growth & development*