Initiation of the Vascular System in the Shoot ofZea maysL. (Poaceae). II. The Procambial Leaf Traces

Citations Over TimeTop 11% of 2002 papers

Abstract

When all of the procambial strands are identified and followed in serial cross sections of shoot tips of Zea mays, a pattern to the initiation of the vascular system emerges. A primary thickening meristem, which is near the periphery of each disk of insertion bearing a leaf primordium, generates a succession of waves of isolated procambia. Differentiation of the ground meristem between these isolated procambial sites (dot‐to‐dot growth) advances a resulting sympodium proximally toward a leaf primordium and distally in the axis. Sympodia are not destined to become particular leaf traces; competition among the adjacent procambial sites determines the course of a sympodium. A sympodium becomes recognized as a particular leaf trace when a dot‐to‐dot interconnection (capturing) occurs between a procambial site in the leaf primordium and a site in a recent wave of a disk of insertion. Those procambia that do not contribute to a leaf trace because they persist in isolation will eventually contribute to the horizontal component of the nodal plexus.

Related Papers

• → Initiation of Axillary and Floral Meristems in Arabidopsis(2000)352 cited
• → barren inflorescence2regulates axillary meristem development in the maize inflorescence(2001)147 cited
• The shoot apical meristem: its growth and development.(1998)
• → MGOUN1 and MGOUN2: two genes required for primordium initiation at the shoot apical and floral meristems in Arabidopsis thaliana(1998)109 cited
• → Comparative analysis of axillary and floral meristem development(2005)13 cited