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Appl. Environ. Microbiol., Nov 1996, 4216-4219, Vol 62, No. 11
Copyright © 1996, American Society for Microbiology

Anaerobic Capacities of Leaf Litter

K Kusel and HL Drake
Lehrstuhl fur Okologische Mikrobiologie, BITOK, Universitat Bayreuth, 95440 Bayreuth, Germany

Leaf litter displayed a capacity to spontaneously form organic acids, alcohols, phenolic compounds, H(inf2), and CO(inf2) when incubated anaerobically at 20(deg)C either as buffered suspensions or in a moistened condition in microcosms. Acetate was the predominant organic product formed regardless of the degree of litter decomposition. Initial rates of acetate formation in litter suspensions and microcosms approximated 2.6 and 0.53 (mu)mol of acetate per g (dry weight) of litter per h, respectively. Supplemental H(inf2) was directed towards the apparent acetogenic synthesis of acetate. Acetoclastic methanogenesis was induced by partially decomposed litter after extended lag phases; freshly fallen litter did not display this capacity.


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