Document Detail

Plant hormone conjugation: a signal decision.
MedLine Citation:
PMID:  19820345     Owner:  NLM     Status:  PubMed-not-MEDLINE    
Tight regulation of the auxin hormone indole-3-acetic acid (IAA) is crucial for plant development. Newly discovered IAA antagonists are the amide-linked tryptophan conjugates of IAA and jasmonic acid (JA). JA-Trp and IAA-Trp interfered with root gravitropism in Arabidopsis, and inhibited several responses to exogenously supplied IAA. Relatively low concentrations of the inhibitors occurred in Arabidopsis, but Pisum sativum flowers contained over 300 pmole g(-1) FW of JA-Trp. DihydroJA was an even more effective inhibitor than JA-Trp, suggesting that Trp conjugates with other JA derivatives may also be functional. JA-Trp and IAA-Trp add to the list of documented bioactive amide hormone conjugates. The only other example is JA-Ile, the recently discovered jasmonate signal. These examples establish that conjugation not only inactivates hormones, but in some cases creates novel compounds that function in hormone signaling.
Paul Staswick
Related Documents :
24264015 - Growth impact of o3, no 2 and/or so 2 on pinus taeda.
23293875 - Clinal variation in colony breeding structure and level of inbreeding in the subterrane...
24258445 - Dual role of pyrrolizidine alkaloids in nectar.
19596005 - Touch induces atp release in arabidopsis roots that is modulated by the heterotrimeric ...
19634425 - Alteration of microbial properties and community structure in soils exposed to napropam...
21831855 - The presence of co-flowering species facilitates reproductive success of pedicularis mo...
Publication Detail:
Type:  Comment; Journal Article     Date:  2009-08-02
Journal Detail:
Title:  Plant signaling & behavior     Volume:  4     ISSN:  1559-2324     ISO Abbreviation:  Plant Signal Behav     Publication Date:  2009 Aug 
Date Detail:
Created Date:  2009-10-12     Completed Date:  2010-05-03     Revised Date:  2010-09-28    
Medline Journal Info:
Nlm Unique ID:  101291431     Medline TA:  Plant Signal Behav     Country:  United States    
Other Details:
Languages:  eng     Pagination:  757-9     Citation Subset:  -    
Department of Agronomy and Horticulture, University of Nebraska, Lincoln, NE 68521, USA.
Export Citation:
APA/MLA Format     Download EndNote     Download BibTex
MeSH Terms
Comment On:
Plant Physiol. 2009 Jul;150(3):1310-21   [PMID:  19458116 ]

From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine

Previous Document:  Is the Arabidopsis root niche protected by sequestration of the CLE40 signal by its putative recepto...
Next Document:  Regulation by salt of vacuolar H+-ATPase and H+-pyrophosphatase activities and Na+/H+ exchange.