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Plant Physiol. 1976 Jan;57(1):55-8.

Nitrate absorption by barley: I. Kinetics and energetics.

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1
Department of Agronomy and Range Science, University of California, Davis, California 95616.

Abstract

The absorption of NO(3) (-) by barley (Hordeum vulgare L.) was investigated by following the disappearance of NO(3) (-). The absorption was related to several parameters: NO(3) (-) and Ca(2+) concentrations, pH, and the presence of various anions. Absorption rate increased with increasing Ca(2+) concentration, reaching a maximum at approximately 5 mm Ca(2+), and was considerably inhibited by NH(4) (+). Absorption was influenced markedly by pH, and little or not at all by anions (Cl(-), Br(-), SO(4) (2-)), and was decreased by respiratory and oxidative phosphorylation inhibitors.

PMID:
16659425
PMCID:
PMC541962
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