Über den Ureidstoffwechsel beim Laubmoosprotonema von Funaria hygrometrica L. (Sibth.): I. Der Einfluß vou verschiedenfarbigem Licht

Abstract

1. Allantoin and allantoic acid were about 6 % of the total nitrogen content of moss protonema ( Funaria hygrornetica L.). 2. The level of endogenous allantoin depends on the spectrum colour of the irradiation. The peaks coincide with the peaks of a chlorophyll absorption spectrum from a methanolic extract of moss protonema. 3. The total amount of allan to in consists of two parts. One part is supplied by metabolism in darkness but the main one depends on light. Green- and far red light are “physiological dark conditions” for the moss protonema. In the dark ureide degradation comes to an end with allantoic acid. There are only traces of urea. 4. The coinciding correlations between the levels of allantoin and chlorophyll as the influences of inhibitors (DCMU, Salicylaldoxime, Cycloheximide, 2, 4 DNP, Chloramphenicol) are every reason to believe that the chloroplasts are the regulating organelles of the ureide metabolism.