cis-12-Oxo-phytodienoic acid represses Arabidopsis seed germination in shade conditions.
Abscisic Acid
/ metabolism
Arabidopsis
/ metabolism
Arabidopsis Proteins
/ genetics
Cyclopentanes
/ metabolism
Diazonium Compounds
/ metabolism
Gene Expression Regulation, Plant
Germination
/ physiology
Gibberellins
/ metabolism
Light
Oxylipins
/ metabolism
Plant Growth Regulators
/ metabolism
Pyridines
/ metabolism
Seeds
/ metabolism
ABA
FR-light
MFT
OPDA
phytochrome
seed germination
shade
Journal
Journal of experimental botany
ISSN: 1460-2431
Titre abrégé: J Exp Bot
Pays: England
ID NLM: 9882906
Informations de publication
Date de publication:
24 10 2019
24 10 2019
Historique:
received:
14
05
2019
accepted:
16
07
2019
pubmed:
22
7
2019
medline:
18
8
2020
entrez:
22
7
2019
Statut:
ppublish
Résumé
Light-dependent seed germination is induced by gibberellins (GA) and inhibited by abscisic acid (ABA). The widely accepted view of the GA/ABA ratio controlling germination does not, however, explain the fact that seeds deficient in ABA still germinate poorly under shade conditions that repress germination. In Arabidopsis, MOTHER-OF-FT-AND-TFL1 (MFT) acts as a key negative regulator of germination, modulating GA and ABA responses under shade conditions. Under full light the oxylipin cis-12-oxo-phytodienoic acid (OPDA), a precursor of the stress-related phytohormone jasmonic acid, interacts with ABA and MFT to repress germination. Here, we show that under shade conditions both OPDA and ABA repress germination to varying extents. We demonstrate that the level of shade-induced MFT expression influences the ability of OPDA and/or ABA to fully repress germination. We also found that MFT expression decreases with seed age and this again correlates with the response of seeds to OPDA and ABA. We conclude that OPDA plays an essential role alongside ABA in repressing germination in response to shade and the combined effect of these phytohormones is integrated to a significant extent through MFT.
Identifiants
pubmed: 31326997
pii: 5536641
doi: 10.1093/jxb/erz337
pmc: PMC6812700
doi:
Substances chimiques
Arabidopsis Proteins
0
Cyclopentanes
0
Diazonium Compounds
0
Gibberellins
0
Oxylipins
0
Plant Growth Regulators
0
Pyridines
0
2-(2'-pyridyldithio)benzyldiazoacetate
63681-84-5
jasmonic acid
6RI5N05OWW
Abscisic Acid
72S9A8J5GW
Types de publication
Journal Article
Research Support, Non-U.S. Gov't
Langues
eng
Sous-ensembles de citation
IM
Pagination
5919-5927Subventions
Organisme : Biotechnology and Biological Sciences Research Council
ID : BB/J00216X/1
Pays : United Kingdom
Informations de copyright
© The Author(s) 2019. Published by Oxford University Press on behalf of the Society for Experimental Biology.
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