title: [Microorganisms in gums. IV. Microbial degradation of plant exudates and seaweed extracts (author's transl)].
abstract: The three plant exudates gum traganth, gum arabic, and gum karaya and the two seaweed extracts carrageenan and alginate were degraded by five different Bacilli which were isolated from these gums: Bacillus coagulans, B. lentus, B. cereus, B. licheniformis, and B. firmus. After 14 days all the gums have been degraded by these Bacilli to a different extent after addition of trace elements. The fractions of degraded gums by TLC, GLC, and IR-spectroscopy have been examined with the following results: 1. Except the already known monomers of the above mentioned gums no other monosaccharides could be found. 2. The microbial degradation of gum karaya and alginate resulted in products with a high molecularweight. Monomers could not be determined. 3. Carrageenan has been degraded to oligosaccharides with molecularweights of about 500, 3,6-anhydrogalactose has been partly identified. 4. Gum arabic has been partly degraded to rhamnose and arabinose. 5. Gum traganth has been partly degraded to arabinose and xylose and partly to polysaccharides with molecularweights under 3000.
mesh_terms: D000045:Acacia / Q000382:microbiology; D001089:Arabinose / Q000378:metabolism; D001407:Bacillus / Q000302:isolation & purification* / Q000378:metabolism; D001409:Bacillus cereus / Q000302:isolation & purification; D005122:Exudates and Transudates / Q000378:metabolism / Q000382:microbiology*; D010944:Plants / Q000382:microbiology; D012210:Rhamnose / Q000378:metabolism
chemical_list: D001089:Arabinose; D012210:Rhamnose
vernacular_title: Mikroorganismen in Verdickungsmitteln. IV. Mikrobieller Abbau von drei Pflanzenexudaten und zwei Meeresalgenextrakten