Optimization of Ammonium Acquisition and Metabolism by Potassium in Rice (oryza Sativa L. Cv. Ir-72)p Ce_2046 23..34
Optimization of Ammonium Acquisition and Metabolism by Potassium in Rice (oryza Sativa L. Cv. Ir-72)p Ce_2046 23..34
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通讯作者：
K. D. Balkos;D. T. Britto;H. Kronzucker
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作者：
K. D. Balkos;D. T. Britto;H. Kronzucker
我们提出了第一个表征K +优化氮吸收和代谢的NH 4+耐受物种，热带低地水稻（cv。IR-72）。13 N放射性示踪表明，增加K +供应减少无效的NH 4+在质膜循环，减少单向流入和流出的过度率。药理试验表明，低亲和力NH 4+内流可能是由K +和非选择性阳离子通道介导的。
We present the first characterization of K + optimization of N uptake and metabolism in an NH4 +-tolerant species, tropical lowland rice (cv. IR-72). 13 N radiotracing showed that increased K + supply reduces futile NH4 + cycling at the plasma membrane, diminishing the excessive rates of both unidirectional influx and efflux. Pharmacological testing showed that low-affinity NH4 + influx may be mediated by both K + and non-selective cation channels.