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Nodule Nitrate Reductase as a Source of Reduced Nitrogen in Soybean, Glycine max
Author(s) -
RANDALL DOUGLAS D.,
RUSSELL WALTER J.,
JOHNSON DAVID R.
Publication year - 1978
Publication title -
physiologia plantarum
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.351
H-Index - 146
eISSN - 1399-3054
pISSN - 0031-9317
DOI - 10.1111/j.1399-3054.1978.tb01631.x
Subject(s) - nitrate reductase , glycine , nitrate , nitrogen , nodule (geology) , chemistry , enzyme , reductase , biology , botany , agronomy , horticulture , biochemistry , amino acid , organic chemistry , paleontology
Hydroponically grown soybeans were fed 15 N‐enriched NaNO 3 at nine reproductive stages of development. The stem exudates contained excess 15 N in the fully reduced nitrogen fraction. The soybean nodules had high nitrate reductase activity, whereas the roots had no detectable nitrate reductase activity. Based on these results, we concluded that the nodule nitrate reductase system has the potential of contributing significantly to the nitrogen economy of the plant.