Abstract
WAT1 (WALLS ARE THIN1) defines a novel auxin transporter in plants and integrates auxin signaling in secondary wall formation in Arabidopsis fibers. IUFRO Tree Biotechnology Conference 2011: From Genomes to Integration and Delivery
Highlights
Our knowledge of signaling mechanisms involved in secondary cell wall (SCW) formation is quite limited
In addition to the SCW phenotype, wat1 was characterized by 5-Me-tryptophan seedling toxicity, severely decreased auxin transport and content in stems, and massive down-regulation of auxin-related genes
These data led us to the conclusion that WAT1 acts as an upstream regulator of SCW deposition in fibers, presumably through an auxin-mediated mechanism [2]
Summary
Background Our knowledge of signaling mechanisms involved in secondary cell wall (SCW) formation is quite limited. To discover novel markers of SCW, a genomics approach using Zinnia elegans xylogenic cultures was undertaken that identified hundreds of gene candidates expressed at the onset of secondary wall formation [1]. Arabidopsis homologs and the corresponding T-DNA mutants for each Zinnia gene were identified and the panel of Arabidopsis cell wall mutants was subjected to developmental and wall-related phenotyping.
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