Enzymbildung in Roggenkeimlingen Während der Umstellung von Heterotrophem auf Autotrophes Wachstum

摘要: 1. The formation of enzymes the oxidative and reductive pentose phosphate cycle was followed in developing rye seedlings. Ribulose diphosphate carboxylase transketolase are absent dry seeds; ribose isomerase is found only trace amounts. In light as well dark increase immediately after onset germination, whereas ribulose appears later. Remarkably latter enzyme also formed completely dark-grown At this stage isolated thylakoids already present proplastids. The these Calvincycle promoted by light. 2. The strongly suppressed low temperature or chloramphenicol. Chloramphenicol inhibits growth proplastids prevents but not prolamellar bodies. 3. Glucose-6-phosphate dehydrogenase, phosphogluconate shikimate dehydrogenase embryo. beginning seedling development there a rapid glucose-6-phosphate dehydrogenase. shoots rate levels off at moment when appears. This decrease due to lack nutrients, must be caused specific regulation. 4. When prevented chloramphenicol, continues constant rate. It concluded that factors which appear Calvin-cycle formed. effect directly connected with vernalisation phenomena. 5. The results suggest plays special role heterotrophic growth.