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Art und Menge der Ausscheidung 14 C‐markierter Verbindungen bei Chlorella pyrenoidosa unter dem Einfluss des osmotischen Drucks der Nährlösung
Author(s) -
WELLER Von H.,
HDFNER W.,
LINSER H.
Publication year - 1973
Publication title -
physiologia plantarum
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.351
H-Index - 146
eISSN - 1399-3054
pISSN - 0031-9317
DOI - 10.1111/j.1399-3054.1973.tb08605.x
Subject(s) - chlorella pyrenoidosa , nutrient , excretion , algae , chemistry , chlorella , osmotic pressure , organic matter , dry weight , dry matter , botany , food science , zoology , biochemistry , chromatography , biology , organic chemistry
Chlorella pyrenoidosa was labelled by 14 CO 2 and the nature and amount of excreted organic compounds in nutrient media of different osmotic pressure were determined after a 24 h period. The total rate of excretion of organic bound 14 C was about 4 μg 14 C per mg harvested algal dry matter or 1% of the total 14 C content of the algae at the beginning of the excretion period. The main compounds found in the excretions were unidentified substances with a molecular weight higher than 700, amino acids, organic acids and sugars. The osmotic pressure of the nutrient medium did not affect the total amount of the organic excretions. However, the excreted amounts of some specific compounds differed in respect to the osmotic conditions of the nutrient medium.