Optimization of ammonium acquisition and metabolism by potassium in rice (Oryza sativa L. cv. IR-72).

@article{Balkos2010OptimizationOA,
  title={Optimization of ammonium acquisition and metabolism by potassium in rice (Oryza sativa L. cv. IR-72).},
  author={Konstantine D. Balkos and Dev T. Britto and Herbert J. Kronzucker},
  journal={Plant, cell & environment},
  year={2010},
  volume={33 1},
  pages={23-34}
}
ABSTRACT We present the first characterization of K(+) optimization of N uptake and metabolism in an NH(4)(+)-tolerant species, tropical lowland rice (cv. IR-72). (13)N radiotracing showed that increased K(+) supply reduces futile NH(4)(+) cycling at the plasma membrane, diminishing the excessive rates of both unidirectional influx and efflux. Pharmacological testing showed that low-affinity NH(4)(+) influx may be mediated by both K(+) and non-selective cation channels. Suppression of NH(4… CONTINUE READING
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