GS3.1,DG1

2015-01-20 | Categories genes | Tags grain grain size stress flavonoid lignin stress tolerance temperature seed starch ABA grain-filling ABA seed phenotype

Information
- Symbol: GS3.1,DG1
- MSU: LOC_Os03g12790
- RAPdb: Os03g0229500
Publication
- A rice QTL GS3.1 regulates grain size through metabolic-flux distribution between flavonoid and lignin metabolons without affecting stress tolerance., 2021, Commun Biol.
- Leaf-derived ABA regulates rice seed development via a transporter-mediated and temperature-sensitive mechanism., 2021, Sci Adv.
Genbank accession number
Key message
- A rice QTL GS3.1 regulates grain size through metabolic-flux distribution between flavonoid and lignin metabolons without affecting stress tolerance.
- Our demonstration that leaf-derived ABA activates starch synthesis genes explains the incompletely filled and floury seed phenotypes in dg1 Both the DG1-mediated long-distance ABA transport efficiency and grain-filling phenotypes are temperature sensitive
- Specifically, ABA is biosynthesized in both WT and dg1 leaves, but only WT caryopses accumulate leaf-derived ABA
- Moreover, we extended these mechanistic insights to other cereals by observing similar grain-filling defects in a maize DG1 ortholog mutant
Connection

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