Abstract
Nitrate is a major source of N for plant growth, particularly under aerobic agricultural conditions. This nutrient is absorbed from soil solution by both high-affinity and low-affinity transport systems that were first defined physiologically and subsequently by molecular genetic means. This minireview presents an abbreviated history of developments in plant inorganic ion uptake, the physiology of nitrate uptake, and recent developments in the molecular genetic characterization of nitrate transport systems.
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