Genome-wide analysis of Aux/IAA and ARF gene families in Populus trichocarpa

Journal Article · Mon Jan 01 04:00:00 EST 2007 · BMC Plant Biology

DOI:https://doi.org/10.1186/1471-2229-7-59· OSTI ID:932017

Kalluri, Udaya C ^[1]; DiFazio, Stephen P ^[2]; Brunner, A. ^[3]; Tuskan, Gerald A ^[1]

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1. ORNL
2. West Virginia University
3. Virginia Polytechnic Institute and State University (Virginia Tech)

Auxin/Indole-3-Acetic Acid (Aux/IAA) and Auxin Response Factor (ARF) transcription factors are key regulators of auxin responses in plants. A total of 35 Aux/IAA and 39 ARF genes were identified in the Populus genome. Comparative phylogenetic analysis revealed that the subgroups PoptrARF2, 6, 9 and 16 and PoptrIAA3, 16, 27 and 29 have differentially expanded in Populus relative to Arabidopsis. Activator ARFs were found to be two fold-overrepresented in the Populus genome. PoptrIAA and PoptrARF gene families appear to have expanded due to high segmental and low tandem duplication events. Furthermore, expression studies showed that genes in the expanded PoptrIAA3 subgroup display differential expression. The gene-family analysis reported here will be useful in conducting future functional genomics studies to understand how the molecular roles of these large gene families translate into a diversity of biologically meaningful auxin effects.

• Research Organization: Oak Ridge National Laboratory (ORNL)
• Sponsoring Organization: SC USDOE - Office of Science (SC)
• DOE Contract Number: AC05-00OR22725
• OSTI ID: 932017
• Journal Information: BMC Plant Biology, Journal Name: BMC Plant Biology Journal Issue: 59 Vol. 7
• Country of Publication: United States
• Language: English

Related Subjects

59 BASIC BIOLOGICAL SCIENCES
60 APPLIED LIFE SCIENCES
ARABIDOPSIS
ARF
AUXINS
Aux/IAA
Auxin
Comparative Genomics
FUNCTIONALS
GENES
Phylogenetic Analysis
Populus
TRANSCRIPTION FACTORS