Search results for "Funaria hygrometrica"
showing 3 items of 3 documents
Üher den Ureidstoffwechsel heim Lauhmoosprotonema von Funaria hygrometrica L. (SIBTH.)
1974
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 th…
Untersuchungen zur Biosynthese eines Cytokinins in Calluszellen von Laubmoossporophyten
1973
When callus cells derived from the sporogon of the hybrid Funaria hygrometrica x Physcomitrium piriforme are supplied with adenine-8-14C, they produce a labelled cytokinin which has the same chromatographic behavior as N6-γγ-(dimethylallyl)aminopurine. The cytokinin is the first radioactive product that can be detected in the culture medium. It is formed as long as labelled adenine is available. When callus cells are grown in an optimum culture medium containing amino acids, about 10% of the radioactivity supplied as adenine is found in the cytokinin. When the cells are grown in a medium without amino acids, the RNA-content of the cells and the total yield of cytokinin decrease, but about 1…
Über den Ureidstoffwechsel beim Laubmoosprotonema von Funaria hydrometrica L. (Sibth.)1)1)Herrn Prof. Dr. Dr. Kurt Mothes zum 75. Geburtstag gewidmet.
1975
Summary The activity of allantoinase (EC 3.5.2.5) is influenced by light and darkness. The extracts of dark-grown moss protonema showed a very higher enzyme activity than the extracts of light-grown plants. The allantoinase activity was increased by light-dark and decreased by dark-light transitions. DMAP mimicked light effects by stabelizing the charakteristic light depending enzyme avctivities in the dark. The inhibitors DCMU, DNP and CCCP increased the enzyme activity of light-grown moss protonema, to some extend they induced a “physiological dark condition”.