Journal
GENES & DEVELOPMENT
Volume 14, Issue 23, Pages 2938-2943Publisher
COLD SPRING HARBOR LAB PRESS, PUBLICATIONS DEPT
DOI: 10.1101/gad.189200
Keywords
WOODEN LEG; procambium; asymmetric division; DhkA; embryogenesis
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Funding
- NIGMS NIH HHS [R01 GM043778, GM43778] Funding Source: Medline
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The developmental ontogeny of the vascular system (consisting of xylem, phloem and [pro]cambium) is poorly understood despite its central role in plant physiology. We show that in the Arabidopsis root meristem, xylem cell lineages are specified early, whereas phloem and procambium are established through a set of asymmetric cell divisions. These divisions require the WOODEN LEG (WOL) gene. The WOL gene encodes a novel two-component signal transducer with an unusual tandem arrangement of two receiver domains. It is expressed specifically in the vasculature from the early stages of embryogenesis on, consistent with a role as a sensor for vascular morphogenesis.
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