Microautoradiographic studies on host-parasite interactions II. The exchange of 3H-lysine between Uromyces phaseoli and Phaseolus vulgaris |
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| Authors: | Kurt Mendgen |
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| Institution: | (1) Department of Dairy Scienc, University of Illinois, 61801 Urbana, IL, USA;(2) Department of Microbiology, University of Illinois, 61801 Urbana, IL, USA;(3) Institut für Mikrobiologie der Gesellschaft für Strahlen- und Umweltforschung mbH München in Göttingen, Federal Republic of Germany;(4) Department of Dairy Science, 315 Animal Sciences Laboratory, University of Illinois, 61801 Urbana, IL, USA |
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| Abstract: | A new species of anaerobic bacterium that degrades the even-numbered carbon fatty acids, butyrate, caproate and caprylate, to acetate and H2 and the odd-numbered carbon fatty acids, valerate and heptanoate, to acetate, propionate and H2 was obtained in coculture with either an H2-utilizing methanogen or H2-utilizing desulfovibrio. The organism could be grown only in syntrophic association with the H2-utilizer and no other energy sources or combination of electron donor and acceptors were utilized. It was a Gram-negative helical rod with 2 to 8 flagella, about 20 nm in diameter, inserted in a linear fashion about 130 nm or more apart along the concave side of the cell. It grew with a generation time of 84 h in co-culture with Methanospirillum hungatii and was present in numbers of at least 4.5×10-6 per g of anaerobic digestor sludge. |
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| Keywords: | Anaerobic degradation Methanogenesis Sludge Syntrophic association H2 transfer Butyrate Propionate Acetate H2 |
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