Über die löslichen Kohlenhydrate der GrünalgeAcetabularia mediterranea und deren quantitative Veränderungen in kernhaltigen und kernlosen Teilen

Abstract

1. The uninucleate green algaAcetabularia mediterranea contains the following soluble carbohydrates: fructose, sucrose very small amounts of glucose and other sugars chiefly consisting of fructose polymers on paper chromatograms the latter behave like fructosans of higher plants. 2. In enucleated entire cells and cell parts the contents of reducing and non-reducing carbohydrates rise much more than in comparable nucleated cells. 3. This increase in content of soluble carbohydrates is probably due to the fact that in enucleated parts synthetic processes consuming carbohydrates (for example the synthesis of cell wall material and proteins) are weakened and later stopped. Therefore more substrate is available for the synthesis of fructose and fructosans. 4. The stop of cell growth, of protein synthesis and of all other synthetic processes studied to date in enucleated parts cannot be explained by the absence of products of photosynthesis, but must have other reasons. 5. Enucleated cell parts of the apical region are more active in carbohydrate metabolism than equally long parts of the basal region.