A peroxisomal cinnamate:CoA ligase-dependent phytohormone metabolic cascade in submerged rice germination.
Dev Cell
; 59(11): 1363-1378.e4, 2024 Jun 03.
Article
in En
| MEDLINE
| ID: mdl-38579719
ABSTRACT
The mechanism underlying the ability of rice to germinate underwater is a largely enigmatic but key research question highly relevant to rice cultivation. Moreover, although rice is known to accumulate salicylic acid (SA), SA biosynthesis is poorly defined, and its role in underwater germination is unknown. It is also unclear whether peroxisomes, organelles essential to oilseed germination and rice SA accumulation, play a role in rice germination. Here, we show that submerged imbibition of rice seeds induces SA accumulation to promote germination in submergence. Two submergence-induced peroxisomal Oryza sativa cinnamateCoA ligases (OsCNLs) are required for this SA accumulation. SA exerts this germination-promoting function by inducing indole-acetic acid (IAA) catabolism through the IAA-amino acid conjugating enzyme GH3. The metabolic cascade we identified may potentially be adopted in agriculture to improve the underwater germination of submergence-intolerant rice varieties. SA pretreatment is also a promising strategy to improve submerged rice germination in the field.
Key words
Full text:
1
Collection:
01-internacional
Database:
MEDLINE
Main subject:
Plant Growth Regulators
/
Plant Proteins
/
Oryza
/
Germination
/
Peroxisomes
Language:
En
Journal:
Dev Cell
Journal subject:
EMBRIOLOGIA
Year:
2024
Document type:
Article
Affiliation country:
China