Reassessing the role of YUCCAs in auxin biosynthesis

John J. Ross, Nathan D. Tivendale, James B. Reid, Noel W. Davies, Peter P. Molesworth, Edwin K. Lowe, Jason A. Smith, Sandra E. Davidson

Research output: Contribution to journalArticlepeer-review

8 Scopus citations


It is remarkable that although auxin was the first growth-promoting plant hormone to be discovered, and although more researchers work on this hormone than on any other, we cannot be definitive about the pathways of auxin synthesis in plants. In 2001, there appeared to be a dramatic development in this feld, with the announcement of a new gene,1 and a new intermediate, purportedly from the tryptamine pathway for converting tryptophan to the main endogenous auxin, indole-3-acetic acid (IAA). Recently, however, we presented evidence challenging the original and subsequent identifications of the intermediate concerned.2.

Original languageEnglish (US)
Pages (from-to)437-439
Number of pages3
JournalPlant Signaling and Behavior
Issue number3
StatePublished - Mar 2011
Externally publishedYes


  • A-hydroxytryptamine
  • Auxin synthesis
  • Tryptamine


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