Tolstikov, Synthesis and antiviral activity of ureides
and carbamates of betulinic acid and its derivatives, Bioorg.
For the leaf N content, the inoculated plants presented higher values owing to the efficiency of biological nitrogen fixation (BNF), which results in the production of ureides
(allantoin and allantoic acid) in the nodules.
Johansen, "Prodrugs as drug delivery systems IV: N-Mannich bases as potential novel prodrugs for amides, ureides
, amines, and other NH-acidic compounds," Journal of Pharmaceutical Sciences, vol.
Exceptions to this idea occur when urea is the chief cause of nitrogen supply, in species in which ureides
play an significant physiological role (Martin and Ruby, 2004), when too much application of Zn, Cu, Mn, Fe, Ca, or Mg has been made over many years (Martin and Ruby, 2004), and possibly also in nitrogen-fixing crops grown on mineral-poor or highly nickel-fixing (high pH, high lime) soils.
Concentrations of ureides
(allantion and allantoic acid) in xylem sap were measured as the phenylhydrazine derivative of glyoxylate (Young and Conway.
Sap was collected at the pod-fill stage by Vacuum Extraction Method and stored in the freezer at -15degC, then concentrations of ureides
, nitrate and amino-N were determined to calculate the relative ureide- N (%) and percent nitrogen derived from atmosphere (% Ndfa) by the following formula:
In soybean, ureides
(allantoin and allantoic acid) are the N transport molecules from the nodules to the leaves.
The substrates for mineralization are varied, and include such compounds as proteins, peptides, nucleic acids, aminopolysaccharides, urate, and ureides
. Because the substrates are varied, the enzymes that are used to mineralize organic N are also varied.
Faizah AW, Suratmini P, Nurhayata DP, Bagnall DJ, Bergersen FJ (1991) Re-evaluation of the, role of ureides
in the xylem transport of nitrogen in Arachis-spp.
The metabolic products of [N.sub.2] fixation in legumes are reported to be the amide asparagine or the ureides
allantoin and allantoic acid (Streeter, 1991).
Role of amides, amino acids, and ureides
in the nutrition of developing soybean seeds.
, allantoin and allantoic acid, were first identified as important nitrogenous compounds in soybean in 1970 by Ishizuka.