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Reference Detail
| Reference | ||
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| Author | Ishikawa S., Hayashi S., Abe T., Igura M., Kuramata M., Tanikawa H., Iino M., Saito T., Ono Y., Ishikawa T., Fujimura S., Goto A., Takagi H. | |
| Title | Low-cesium rice: mutation in OsSOS2 reduces radiocesium in rice grains. | |
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Abstract: In Japan, radiocesium contamination in foods has become of great concern and it is a primary issue to reduce grain radiocesium concentration in rice (Oryza sativa L.). Here, we report a low-cesium rice mutant 1 (lcs1) with the radiocesium concentration in grain about half that in the wild-type cultivar. Genetic analyses revealed that a mutation in OsSOS2, which encodes a serine/threonine-protein kinase required for the salt overly sensitive (SOS) pathway in plants, is responsible for the decreased cesium (Cs) concentrations in lcs1. Physiological analyses showed that Cs(+) uptake by lcs1 roots was significantly decreased under low-potassium (K(+)) conditions in the presence of sodium (Na(+)) (low K(+)/Na(+)). The transcript levels of several K(+) and Na(+) transporter genes, such as OsHAK1, OsHAK5, OsAKT1, and OsHKT2;1 were significantly down-regulated in lcs1 grown at low K(+)/Na(+). The decreased Cs(+) uptake in lcs1 might be closely related to the lower expression of these genes due to the K(+)/Na(+) imbalance in the lcs1 roots caused by the OsSOS2 mutation. Since the lcs1 plant had no significant negative effects on agronomic traits when grown in radiocesium-contaminated paddy fields, this mutant could be used directly in agriculture for reducing radiocesium in rice grains. |
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| Journal | Sci Rep | |
| Country | Japan | |
| Volume | 7(1) | |
| Pages | 2432 | |
| Year | 2017 | |
| PubMed ID | 28546542 | |
| PubMed Central ID | 5445092 | |
| DOI | 10.1038/s41598-017-02243-9 | |
| URL | - | |
| Relation | ||
| Gene | AKT1 HAK5 HKT1 LCS SOS2 | |
| INSD | - | |
| Strain | Wild Core Collection | - |
| Induced Mutation Lines(NIG Collection) | - | |
| Sterile Seed Strain | - | |
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Lethal Embryo Mutantion Strain |
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Stages in Each Organ - Muant Lines (Gene) |
- | |
| Cultivated Varieties(NIG Collection) | - | |
| Stages in Each Organ | - | |
