An Overview of Nitrogen Metabolism In Higher Plants (original) (raw)

Plant Nitrogen Metabolism, 1989

Abstract

The predominant sources of nitrogen for higher plants are NH4 +, NO3 - and N2. In most forests, where soils are acidic and low in nitrogen, NH4 + is the major nitrogen source. In agricultural soils, NO3 - is the primary source of nitrogen for plant growth and development, even though NH4 + or urea fertilizers may have been applied. Soil microorganisms, under normal conditions, oxidize the NH4 + or urea-N to NO3 - by the process of nitrification. In this review, the metabolism of nitrogen obtained by higher plants from NH4 +, N03 -; or N2 will be discussed.

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