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Hyphomicrobium as a component of the aquatic microflora — morphological and physiological studies on two strains
Author(s) -
Moaledj K.
Publication year - 1980
Publication title -
zeitschrift für allgemeine mikrobiologie
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.58
H-Index - 54
eISSN - 1521-4028
pISSN - 0044-2208
DOI - 10.1002/jobm.19800200804
Subject(s) - formate , assimilation (phonology) , methylamine , chemistry , heterotroph , carbon dioxide , yeast extract , carbon fibers , metabolism , nutrient , strain (injury) , methanol , food science , biology , bacteria , environmental chemistry , biochemistry , fermentation , organic chemistry , philosophy , linguistics , materials science , anatomy , composite number , composite material , genetics , catalysis
Aspects of the morphology, metabolism and physiology of two oligocarbophilic strains of Hyphomicrobium (H 4 K and S 5 K), isolated from the Plußsee, were studied. Both strains are able to grow on mineral salts media without added organic carbon sources. Strain H 4 K grows well even in double distilled water. The two strains cannot grow on mineral media in the absence of atmospheric CO 2 . No growth occurred also in air purified of organic carbon, in spite of the presence of CO 2 . On the contrary, there is good growth in the presence of some organic compounds and without atmospheric CO 2 , i.e. , heterotrophic metabolism without CO 2 assimilation is possible. Growth was enhanced in a methanol atmosphere, and by the addition of yeast extract, methylamine, peptone and glucose. In nutrient solutions containing acetate or formate as carbon source, growth of H 4 K begins only after an adaptation period of ca . 4 weeks.