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Reference Detail
| Reference | ||
|---|---|---|
| Author | Zhang L.a, Hu B.b c, Li W.a, Che R.b c, Deng K.a, Li H.b c, Yu F.a, Ling H.d, Li Y.a, Chu C.b c | |
| Title | OsPT2, a phosphate transporter, is involved in the active uptake of selenite in rice | |
|
Abstract: Selenite is a predominant form of selenium (Se) available to plants, especially in anaerobic soils, but the molecular mechanism of selenite uptake by plants is not well understood. ltn1, a rice mutant previously shown to have increased phosphate (Pi) uptake, was found to exhibit higher selenite uptake than the wild-type in both concentration- and time-dependent selenite uptake assays. Respiratory inhibitors significantly inhibited selenite uptake in the wildtype and the ltn1 mutant, indicating that selenite uptake was coupled with H+ and energy-dependent. Selenite uptake was greatly enhanced under Pi-starvation conditions, suggesting that Pi transporters are involved in selenite uptake. OsPT2, the most abundantly expressed Pi transporter in the roots, is also significantly up-regulated in ltn1 and dramatically induced by Pi starvation. OsPT2-overexpressing and knockdown plants displayed significantly increased and decreased rates of selenite uptake, respectively, suggesting that OsPT2 plays a crucial role in selenite uptake. Se content in rice grains also increased significantly in OsPT2-overexpressing plants. These data strongly demonstrate that selenite and Pi share similar uptake mechanisms and that OsPT2 is involved in selenite uptake, which provides a potential strategy for breeding Se-enriched rice varieties. |
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| Journal | New Phytologist | |
| Country | China | |
| Volume | 201 | |
| Pages | 1183-1191 | |
| Year | 2014 | |
| PubMed ID | 24491113 | |
| PubMed Central ID | - | |
| DOI | 10.1111/nph.12596 | |
| URL | - | |
| Relation | ||
| Gene | LTN1 PT1 PT2 PT4 PT6 PT8 | |
| INSD | - | |
| Strain | Wild Core Collection | - |
| Induced Mutation Lines(NIG Collection) | - | |
| Sterile Seed Strain | - | |
|
Lethal Embryo Mutantion Strain |
- | |
|
Stages in Each Organ - Muant Lines (Gene) |
- | |
| Cultivated Varieties(NIG Collection) | - | |
| Stages in Each Organ | - | |
