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Reference Detail
| Reference | ||
|---|---|---|
| Author | Yang J., Kim S.R., Lee S.K., Choi H., Jeon J.S., An G. | |
| Title | Alanine aminotransferase 1 (OsAlaAT1) plays an essential role in the regulation of starch storage in rice endosperm. | |
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Abstract: Alteration of storage substances, in particular the major storage form starch, leads to floury endosperm. Because floury mutants have physical attributes for milling processes, identification and characterization of those mutants are valuable. In this study we identified a floury endosperm mutant caused by a T-DNA insertion in Oryza sativa alanine-aminotransferase1 (OsAlaAT1). OsAlaAT1 is localized in the cytosol and has aminotransferase enzyme activity. The OsAlaAT1 mutant has less amylose and its amylopectin is structurally altered. OsAlaAT1 is predominantly expressed in developing seeds during active starch synthesis. AlaAT catalyzes the interconversion of pyruvate to alanine, and this pathway is activated under low-oxygen conditions. Consistently, OsAlaAT1 is induced by such conditions. Expression of the starch synthesis genes AGPases, OsSSI, OsSSIIa, and OsPPDKB is decreased in the mutant. Thus, our observations suggest that OsAlaAT1 plays an essential role in starch synthesis in developing seeds that are exposed to low concentrations of oxygen. |
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| Journal | Plant Sci. | |
| Country | South Korea | |
| Volume | 240 | |
| Pages | 79-89 | |
| Year | 2015 | |
| PubMed ID | 26475189 | |
| PubMed Central ID | - | |
| DOI | 10.1016/j.plantsci.2015.07.027 | |
| URL | - | |
| Relation | ||
| Gene | AGPL2 AGPL3 AGPS1 AGPS2 ALAAT2 ALAAT3 ALAAT4 ALAAT5 ALK FLO12 FLO4 SSI _ | |
| INSD | - | |
| Strain | Wild Core Collection | - |
| Induced Mutation Lines(NIG Collection) | - | |
| Sterile Seed Strain | - | |
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Lethal Embryo Mutantion Strain |
- | |
|
Stages in Each Organ - Muant Lines (Gene) |
- | |
| Cultivated Varieties(NIG Collection) | - | |
| Stages in Each Organ | - | |
