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Literature summary for 2.4.1.21 extracted from
- Starch biosynthesis in rice endosperm requires the presence of either starch synthase I or IIIa (2011), J. Exp. Bot., 62, 4819-4831.
Organism
| Organism | UniProt | Comment | Textmining |
|---|---|---|---|
| Oryza sativa | - |
- |
- |
Source Tissue
| Source Tissue | Comment | Organism | Textmining |
|---|---|---|---|
| endosperm | - |
Oryza sativa | - |
Synonyms
| Synonyms | Comment | Organism |
|---|---|---|
| SSI | - |
Oryza sativa |
| SSIIIa | - |
Oryza sativa |
General Information
| General Information | Comment | Organism |
|---|---|---|
| physiological function | construction of double mutants defective in isoforms SSI and SSIIIa. In the F2 generation, two opaque seed types were found to have either the ss1ss1/SS3ass3a or the SS1ss1/ss3ass3a genotype. The endosperm of the two types of opaque seeds displays lower starch synthase activity and contains the unique starch with modified fine structure, round-shaped starch granules, high amylose content, and specific physicochemical properties. The seed weight is about 90% of that of the wild type. The amount of granule-bound starch synthase I and the activity of ADP-glucose diphosphorylase are higher than in the wild type and parent mutant lines. The double-recessive homozygous mutant prepared from both ss1 and ss3a null mutants is considered sterile, while the mutant produced by the leaky ss1 mutant with the ss3a null mutant is fertile | Oryza sativa |
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Release 2023.1 (January 2023)
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