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Abscisic acid promotes jasmonic acid biosynthesis via a ‘SAPK10‐bZIP72‐ AOC ’ pathway to synergistically inhibit seed germination in rice ( Oryza sativa )
- Source :
- The New Phytologist
- Publication Year :
- 2020
- Publisher :
- Wiley, 2020.
-
Abstract
- Summary Abscisic acid (ABA) and jasmonic acid (JA) both inhibit seed germination, but their interactions during this process remain elusive. Here, we report the identification of a ‘SAPK10‐bZIP72‐AOC’ pathway, through which ABA promotes JA biosynthesis to synergistically inhibit rice seed germination.Using biochemical interaction and phosphorylation assays, we show that SAPK10 exhibits autophosphorylation activity on the 177th serine, which enables it to phosphorylate bZIP72 majorly on 71st serine. The SAPK10‐dependent phosphorylation enhances bZIP72 protein stability as well as the DNA‐binding ability to the G‐box cis‐element of AOC promoter, thereby elevating the AOC transcription and the endogenous concentration of JA.Blocking of JA biosynthesis significantly alleviated the ABA sensitivity on seed germination, suggesting that ABA‐imposed inhibition partially relied on the elevated concentration of JA.Our findings shed a novel insight into the molecular networks of ABA–JA synergistic interaction during rice seed germination.
- Subjects :
- 0106 biological sciences
0301 basic medicine
Physiology
seed germination
Germination
Cyclopentanes
Plant Science
01 natural sciences
Serine
03 medical and health sciences
chemistry.chemical_compound
Biosynthesis
Gene Expression Regulation, Plant
bZIP
Oxylipins
Abscisic acid
Oryza sativa
Full Paper
phosphorylation
Research
rice
Jasmonic acid
SnRK2
Autophosphorylation
food and beverages
Oryza
Full Papers
jasmonic acid (JA)
030104 developmental biology
chemistry
Biochemistry
Seeds
abscisic acid (ABA)
Phosphorylation
Abscisic Acid
010606 plant biology & botany
Subjects
Details
- ISSN :
- 14698137 and 0028646X
- Volume :
- 228
- Database :
- OpenAIRE
- Journal :
- New Phytologist
- Accession number :
- edsair.doi.dedup.....5041f122f361f2cd175585dbc1b4acf6