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Auxin perception: in the IAA of the beholder
Author(s) -
Bargmann Bastiaan O. R.,
Estelle Mark
Publication year - 2014
Publication title -
physiologia plantarum
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.351
H-Index - 146
eISSN - 1399-3054
pISSN - 0031-9317
DOI - 10.1111/ppl.12135
Subject(s) - auxin , signal transduction , microbiology and biotechnology , transcription factor , biology , function (biology) , receptor , transcription (linguistics) , plant hormone , chemistry , biochemistry , gene , linguistics , philosophy
Auxin signaling through the SCF TIR1 ‐Aux/ IAA‐ARF pathway is one of the best‐studied plant hormone response pathways. Components of this pathway, from receptors through to transcription factors, have been identified and analyzed in detail. Although we understand elementary aspects of how the auxin signal is perceived and leads to a transcriptional response, many questions remain about the in vivo function of the pathway. Two crucial issues are the tissue specificity of the response, i.e. how distinct cell types can interpret the same auxin signal differently, and the response to a signaling gradient, i.e. how a graded distribution of auxin can elicit distinct expression patterns along its range. Here, we speculate on how signaling through the canonical SCF TIR1 ‐Aux/ IAA‐ARF pathway may achieve divergent responses.