| | |  | | | | Record from Web of Science® | | | | | | |
| A role for the AKT1 potassium channel in plant nutrition |
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| Author(s): Hirsch RE, Lewis BD, Spalding EP, Sussman MR |
| Source: SCIENCE Volume: 280 Issue: 5365 Pages: 918-921 Published: MAY 8 1998 |
| Times Cited: 225 References: 23 |
| Abstract: In plants, potassium serves an essential role as an osmoticum and charge carrier. Its uptake by roots occurs by poorly defined mechanisms. To determine the role of potassium channels in planta, we performed a reverse genetic screen and identified an Arabidopsis thaliana mutant in which the AKT1 channel gene was disrupted. Roots of this mutant lacked inward-rectifying potassium channels and displayed reduced potassium (rubidium-86) uptake. Compared with wild type, mutant plants grew poorly on media with a potassium concentration of 100 micromolar or less. These results and membrane potential measurements suggest that the AKT1 channel mediates potassium uptake from solutions that contain as little as 10 micromolar potassium. |
| Document Type: Article |
| Language: English |
| Reprint Address: Sussman, MR (reprint author), Univ Wisconsin, Dept Hort, Ctr Biotechnol, 1575 Linden Dr, Madison, WI 53706 USA |
Addresses:
1. Univ Wisconsin, Dept Hort, Ctr Biotechnol, Madison, WI 53706 USA
2. Univ Wisconsin, Mol & Cellular Biol Program, Madison, WI 53706 USA
3. Univ Wisconsin, Dept Bot, Madison, WI 53706 USA |
| Publisher: AMER ASSOC ADVANCEMENT SCIENCE, 1200 NEW YORK AVE, NW, WASHINGTON, DC 20005 USA |
| Subject Category: Multidisciplinary Sciences |
| IDS Number: ZM380 |
| ISSN: 0036-8075 |
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| | | | | | | | | Record from Web of Science® | | | | | | | | | |