Root-to-seed transport and metabolism of fixed nitrogen in soybean
Creators
Description
The great energetic demand of nitrogen fixation to support growth of the exceptionally high-N seeds is certainly a major yield barrier for soybeans. Transport of carbohydrate energy supplies to the root and of fixed nitrogen (N) from the root appear to contribute to the yield barrier, also. N is loaded into the soybean xylem stream principally as allantoin (ALL), and allantonic acid (ALLA), but xylem carries only dilute N and cannot reach the seeds at sufficient rate to support their N needs. Explants consisting of stem and a few leaves and pods were allowed to take up 14C- and/or 15N-ALL/ALLA in synthetic xylem sap. The 14C label was found to become fairly quantitatively immobilized in leaves. The N (and 15N label) almost certainly is separated from the C(14C label) at this time
Additional details
Publishing Information
- Imprint Title
- Los Alamos Life Sciences Division's biomedical and environmental research programs. Progress report, January-December 1982
- Journal Page Range
- p. 159-160.
- Report number
- LA--9816-PR
INIS
- Country of Publication
- United States
- Country of Input or Organization
- United States
- INIS RN
- 15046357
- Subject category
- S60: APPLIED LIFE SCIENCES;
- Descriptors DEI
- ALLANTOIN; AMINO ACIDS; BIOSYNTHESIS; CARBON 14 COMPOUNDS; CATALYSIS; ENZYMES; METABOLISM; NITROGEN FIXATION; NITROGEN 15; PRODUCTIVITY; SOYBEANS; TISSUE CULTURES; TRACER TECHNIQUES; TRANSLOCATION
- Descriptors DEC
- AZOLES; CARBON COMPOUNDS; CARBOXYLIC ACIDS; FOOD; HETEROCYCLIC COMPOUNDS; IMIDAZOLES; ISOTOPE APPLICATIONS; ISOTOPES; LIGHT NUCLEI; NITROGEN ISOTOPES; NUCLEI; ODD-EVEN NUCLEI; ORGANIC ACIDS; ORGANIC COMPOUNDS; ORGANIC NITROGEN COMPOUNDS; ORGANIC OXYGEN COMPOUNDS; SEEDS; STABLE ISOTOPES; SYNTHESIS; VEGETABLES