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Reference Detail
| Reference | ||
|---|---|---|
| Author | Fuchs I., Sonja Stölzle, Ivashikina N., Hedrich R. | |
| Title | Rice K+ uptake channel OsAKT1 is sensitive to salt stress. | |
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Abstract: Potassium ions constitute the most important macronutrients taken up by plants. To unravel the mechanisms of K+ uptake and its sensitivity to salt stress in the model plant rice, we isolated and functionally characterized OsAKT1, a potassium channel homologous to the Arabidopsis root inward rectifier AKT1. OsAKT1 transcripts were predominantly found in the coleoptile and in the roots of young rice seedlings. K+ channel mRNA decreases in response to salt stress, both in the shoot and in the root of 4-day-old rice seedlings. Following expression in HEK293 cells, we were able to characterize OsAKT1 as a voltage-dependent, inward-rectifying K+ channel regulated by extracellular Ca2+ and protons. Patch-clamp studies on rice root protoplasts identified a K+ inward rectifier with similar channel properties as heterologously expressed OsAKT1. In line with the transcriptional downregulation of OsAKT1 in response to salt stress, inward K+ currents were significantly reduced in root protoplasts. Thus, OsAKT1 seems to represent the dominant salt-sensitive K+ uptake channel in rice roots. |
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| Journal | Planta | |
| Country | Germany | |
| Volume | 221(2) | |
| Pages | 212-21 | |
| Year | 2005 | |
| PubMed ID | 15599592 | |
| PubMed Central ID | - | |
| DOI | 10.1007/s00425-004-1437-9 | |
| URL | - | |
| Relation | ||
| Gene | AKT1 | |
| 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 | - | |
