6533b839fe1ef96bd12a6302
RESEARCH PRODUCT
Üher den Ureidstoffwechsel heim Lauhmoosprotonema von Funaria hygrometrica L. (SIBTH.)
Gerhard ArnoldElmar Hartmannsubject
Allantoic acidbiologyArginineGeneral MedicineGeneral ChemistryMetabolismOrnithinebiology.organism_classificationFunaria hygrometricachemistry.chemical_compoundchemistryBiochemistryUreaAllantoicaseProtonemadescription
Summary The uptake of allantoine-7- 14 C by moss protonema grown in submerged culture is controlled by light and by the degree of catabolisation within the cell. The rate of uptake was enhanced by the application of ATP + glucose to the medium of a dark grown culture. The degradation products of allantoine-7- 14 C in light grown protonema are allantoic acid and urea. Urea is degraded in the Henseleit-Krebs-cycle to ornithine, citrulline and arginine. Urea is a further source of radioactive CO 2 . In darkness, the single product of allantoine degradation is allantoic acid. Allantoicase is blocked in the dark but the metabolism can be activated by the application of ATP or ATP + glucose to the medium. It is likely that the chloroplasts and cooperating microbodies are important for the ureide metabolism. Tests with inhibitors of photosynthesis and respiration processes provide hints for this assumption.
| year | journal | country | edition | language |
|---|---|---|---|---|
| 1974-01-01 | Biochemie und Physiologie der Pflanzen |