Primary vascular pattern and expression of ATHB‐8 in shoots of Arabidopsis
- 21 May 2003
- journal article
- Published by Wiley in New Phytologist
- Vol. 158 (3), 443-454
- https://doi.org/10.1046/j.1469-8137.2003.00769.x
Abstract
• Primary vascular pattern determines pathways of long distance transport for water, nutrients and signalling molecules within plant shoot systems. • Expression of an Arabidopsis thaliana homeobox gene 8::GUS construct is restricted to the procambium and provides a molecular marker for vascular pattern at early developmental stages. • Primary vascular pattern and phyllotaxis are highly coordinated, with vascular sympodia corresponding to phyllotactic parastichies. During vegetative development, primary vasculature forms a reticulate pattern, with each leaf trace derived from two vascular sympodia. Shoot phase change is marked by alterations of this fundamental pattern. Formation of leaf trace procambial strands is temporally coordinated with primordium initiation, but ATHB-8::GUS expression is discontinuous in these strands at early stages. • The interconnection of vascular sympodia provides alternate pathways for long distance transport in shoots of A. thaliana and reflects the limited secondary growth in this species. ATHB-8::GUS expression identifies a prepattern that precedes anatomical definition of procambium. The longitudinal discontinuity in ATHB-8::GUS expression indicates that one function of this gene is to define the xylem components of vascular radial pattern.Keywords
This publication has 35 references indexed in Scilit:
- Plants as resource mosaics: a functional model for predicting patterns of within‐plant resource heterogeneity to consumers based on vascular architecture and local environmental variabilityOikos, 2001
- Developmental Changes Due to Long-Distance Movement of a Homeobox Fusion Transcript in TomatoScience, 2001
- Vascular Differentiation and Transition in the Seedling of Arabidopsis thaliana (Brassicaceae)International Journal of Plant Sciences, 1999
- Leaf Vascular Pattern Formation.Plant Cell, 1997
- Bi-directional inflorescence development inArabidopsis thaliana: Acropetal initiation of flowers and basipetal initiation of paracladesPlanta, 1994
- Phase Change and the Regulation of Shoot Morphogenesis in PlantsScience, 1990
- Differentiation of Vascular TissuesAnnual Review of Plant Physiology, 1987
- REPLACEMENT OF LEAF PRIMORDIA WITH IAA IN THE INDUCTION OF VASCULAR DIFFERENTIATION IN THE STEM OF COLUCUSNew Phytologist, 1984
- The morphology and growth of the vegetative and reproductive apices of Arabidopsis thaliana (L.) Heynh., Capsella bursa-pastoris (L.) Medic. and Anagallis arvensis L.Journal of the Linnean Society of London, Botany, 1955
- Anatomy of the Primary Vascular System in Dicotyledonous PlantsNature, 1946