Author(s) :
He Xiang
;
Jiang JiShan
;
Wang ChangQuan
;
Katayoon Dehesh
Author Affiliation :
Department of Botany and Plant Sciences and Institute of Integrative Genome Biology, University of California, Riverside, CA 92506, USA.
Author Email :
kdehesh@ucr.edu
Journal article
:
Journal of Integrative Plant Biology
2017
Vol.59
No.4
pp.275-287
ref.41
Abstract :
Hormonal crosstalk is central for tailoring plant responses to the nature of challenges encountered. The role of antagonism between the two major defense hormones,
salicylic acidsalicylic acidSubject Category: Chemicals and Chemical Groups
see more details (SA) and
jasmonic acidjasmonic acidSubject Category: Chemicals and Chemical Groups
see more details (JA), and modulation of this interplay by
ethyleneethyleneSubject Category: Chemicals and Chemical Groups
see more details (ET) in favor of JA signaling pathway in plant stress responses is well recognized, but the underlying mechanism is not fully understood. Here, we show the opposing function of two
transcription factorstranscription factorsSubject Category: Chemicals and Chemical Groups
see more details, ethylene insensitive3 (EIN3) and EIN3-Like1 (EIL1), in SA-mediated suppression and JA-mediated activation of
PLANT DEFENSIN1.2 (
PDF1.2). This functional duality is mediated via their effect on protein, not transcript levels of the
PDF1.2 transcriptional activator octadecanoid-responsive
Arabidopsis59 (ORA59). Specifically, JA induces ORA59 protein levels independently of EIN3/EIL1, whereas SA reduces the protein levels dependently of EIN3/EIL1. Co-infiltration assays revealed nuclear co-localization of ORA59 and EIN3, and split-luciferase together with yeast-two-hybrid assays established their physical interaction. The functional ramification of the physical interaction is EIN3-dependent degradation of ORA59 by the 26S proteasome. These findings allude to SA-responsive reduction of ORA59 levels mediated by EIN3 binding to and targeting of ORA59 for degradation, thus nominating ORA59 pool as a coordination node for the antagonistic function of ET/JA and SA.
ISSN :
1672-9072
URL :
http://onlinelibrary.wiley.com/journa...
Record Number :
20173323523
Publisher :
Wiley
Location of publication :
Beijing
Country of publication :
China
Language of text :
English
Indexing terms for this abstract:
Organism descriptor(s) :
Arabidopsis thalianaarabidopsis thalianaSubject Category: Organism Names
see more details
Descriptor(s) :
ethyleneethyleneSubject Category: Chemicals and Chemical Groups
see more details, jasmonic acidjasmonic acidSubject Category: Chemicals and Chemical Groups
see more details, plant growth regulatorsplant growth regulatorsSubject Category: Chemicals and Chemical Groups
see more details, plant proteinsplant proteinsSubject Category: Chemicals and Chemical Groups
see more details, salicylic acidsalicylic acidSubject Category: Chemicals and Chemical Groups
see more details, synergismsynergismSubject Category: Miscellaneous
see more details, transcription factorstranscription factorsSubject Category: Chemicals and Chemical Groups
see more details
Identifier(s) :
plant growth substances, plant hormones, synergy
Broader term(s) :
ArabidopsisarabidopsisSubject Category: Organism Names
see more details, BrassicaceaebrassicaceaeSubject Category: Organism Names
see more details, BrassicalesbrassicalesSubject Category: Organism Names
see more details, eudicotseudicotsSubject Category: Organism Names
see more details, angiospermsangiospermsSubject Category: Organism Names
see more details, SpermatophytaspermatophytaSubject Category: Organism Names
see more details, plantsplantsSubject Category: Organism Names
see more details, eukaryoteseukaryotesSubject Category: Organism Names
see more details