Article ; Online: SMAX1 interacts with DELLA protein to inhibit seed germination under weak light conditions via gibberellin biosynthesis in Arabidopsis.
2023 Volume 42, Issue 7, Page(s) 112740
Abstract: Karrikins (KARs) were first identified as a class of small-molecule chemicals derived from smoke that promote seed germination. However, the implied mechanism is still not well understood. Here, we find that KAR signaling mutants have a lower germination ...
Abstract | Karrikins (KARs) were first identified as a class of small-molecule chemicals derived from smoke that promote seed germination. However, the implied mechanism is still not well understood. Here, we find that KAR signaling mutants have a lower germination percentage than that of wild type under weak light conditions, and KARs promote seed germination through transcriptional activation of gibberellin (GA) biosynthesis via SMAX1. SMAX1 interacts with the DELLA proteins REPRESSOR of ga1-3-LIKE 1 (RGL1) and RGL3. The interaction enhances the transcriptional activity of SMAX1 and inhibits GIBBERELLIN 3-oxidase 2 (GA3ox2) gene expression. The KAR signaling mutant seed germination defect under weak light is partially rescued by exogenous application of GA |
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MeSH term(s) | Arabidopsis/metabolism ; Arabidopsis Proteins/genetics ; Arabidopsis Proteins/metabolism ; Gene Expression Regulation, Plant ; Germination/genetics ; Gibberellins/metabolism ; Intracellular Signaling Peptides and Proteins/metabolism ; Seeds/genetics |
Chemical Substances | Arabidopsis Proteins ; Gibberellins ; Intracellular Signaling Peptides and Proteins ; SMAX1 protein, Arabidopsis ; GAI protein, Arabidopsis |
Language | English |
Publishing date | 2023-07-04 |
Publishing country | United States |
Document type | Journal Article ; Research Support, Non-U.S. Gov't |
ZDB-ID | 2649101-1 |
ISSN | 2211-1247 ; 2211-1247 |
ISSN (online) | 2211-1247 |
ISSN | 2211-1247 |
DOI | 10.1016/j.celrep.2023.112740 |
Database | MEDical Literature Analysis and Retrieval System OnLINE |
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