Document Detail

SHORT INTERNODES/STYLISH genes, regulators of auxin biosynthesis, are involved in leaf vein development in Arabidopsis thaliana.
MedLine Citation:
PMID:  23293954     Owner:  NLM     Status:  In-Data-Review    
Leaves depend on highly developed venation systems to collect fixed carbon for transport and to distribute water. We hypothesized that local regulation of auxin biosynthesis plays a role in vein development. To this effect, we assessed the role of the SHORT INTERNODES/STYLISH (SHI/STY) gene family, zinc-finger transcription factors linked to regulation of auxin biosynthesis, in Arabidopsis thaliana leaf vein development. Gene functions were assessed by a combination of high-resolution spatio-temporal expression analysis of promoter-marker lines and phenotypic analysis of plants homozygous for single and multiple mutant combinations. The SHI/STY genes showed expression patterns with variations on a common theme of activity in incipient and developing cotyledon and leaf primordia, narrowing to apices and hydathode regions. Mutant analysis of single to quintuple mutant combinations revealed dose-dependent defects in vein patterning affecting multiple vein traits, most notably in cotyledons. Here we demonstrate that local regulation of auxin biosynthesis is an important aspect of leaf vein development. Our findings also support a model in which auxin synthesized at the periphery of primordia affects vein development.
Tammy Baylis; Izabela Cierlik; Eva Sundberg; Jim Mattsson
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Publication Detail:
Type:  Journal Article    
Journal Detail:
Title:  The New phytologist     Volume:  197     ISSN:  1469-8137     ISO Abbreviation:  New Phytol.     Publication Date:  2013 Feb 
Date Detail:
Created Date:  2013-01-08     Completed Date:  -     Revised Date:  -    
Medline Journal Info:
Nlm Unique ID:  9882884     Medline TA:  New Phytol     Country:  England    
Other Details:
Languages:  eng     Pagination:  737-50     Citation Subset:  IM    
Copyright Information:
© 2013 The Authors. New Phytologist © 2013 New Phytologist Trust.
Department of Biological Sciences, Simon Fraser University, Burnaby, BC, V5A 1S6, Canada.
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