The Biotransformation of Lignin to Humus—Facts and Postulates

Oglesby, Ray T.; Christman, RF; Driver, Charles H.

doi:10.1016/s0065-2164(08)70528-8

Cited by 18 publications

(8 citation statements)

References 15 publications

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“…tial decomposition of the various lignins by the microflora of different soils. The percentages shown for conversion of ['4C]lignocelluloses to '4CO2 are actually minimum values since much lignin may be degraded without conversion to CO2 by the process of humification (8,14). Some 14C will be incorporated into cell mass of soil microorganisms, decreasing further the observed rates of lignin degradation.…”

Section: Resultsmentioning

confidence: 99%

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Microbial Degradation of Lignocellulose: the Lignin Component

Crawford

1976

Appl Environ Microbiol

145

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A new procedure was developed for the study of lignin biodegradation by pure or mixed cultures of microorganisms. Natural lignocelluloses were prepared containing '4C in primarily their lignin components by feeding plants L-[U-'4C]phenylalanine through their cut stems. Lignin degradation was observed in numerous soils by monitoring evolution of '4CO2 from [L4C]lignin-labeled oak (Quercus albus), maple (Acer rubrum), and cattail (Typha latifola). An organism (Thermonospora fusca ATCC 27730) that is known to degrade cellulose but not lignin was shown to grow on lignocellulose in the presence of ['4C]lignocelluloses without evolution of 14CO2. A known lignin degrader (a white-rot fungus, Polyporus versicolor) was shown to readily evolve 14CO2 from damp '4C-labeled cattail and '4C-labeled maple.

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Section: Resultsmentioning

confidence: 99%

“…Natural lignocelluloses containing '4C in their lignin components will be ofobvious value in studies of lignin biodegradation. They will be of particular value in studies of the turnover of lignin in natural environments, especially the study of humification (8,14).…”

Section: Resultsmentioning

confidence: 99%

Microbial Degradation of Lignocellulose: the Lignin Component

Crawford

1976

Appl Environ Microbiol

145

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“…Polyporus versicolor decomposes lignified tissues by digesting polyphenylpropane polymers and associated aromatic ring structures of the lignin polymer. This white-rot decay is reported to be based on the production of polyphenoloxidase and peroxidase enzymes (15,16). Ander et al (2) have reported that a phenol oxidaseless mutant of the white-rot fungus Sporotrichum pulverulentum lost the ability to degrade lignin and other wood components.…”

Section: Discussionmentioning

confidence: 99%

Degradation of Coal by the Fungi Polyporus versicolor and Poria monticola

Cohen

Gabriele

1982

Appl Environ Microbiol

219

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We report that two species of basidiomycete fungi ( Polyporus versicolor and Poria monticola ) grow in minimal liquid or solid medium when supplemented with crushed lignite coal. The fungi also grow directly on crushed lignite coal. The growth of both fungi was observed qualitatively as the production and extension of hyphae. No fungal growth occurred in minimal agar medium without coal. The fungi degraded solid lignite coal to a black liquid product which never appeared in cultures unless fungi and coal were present together. Apparently, lignite coal can serve as the principal substrate for the growth of the fungi. Infrared analyses of the liquid products of lignite degradation showed both similarities to and differences from the original lignite.

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“…Some theories have lasted for years; for example, the 'sugar-amine condensation' theory, the 'lignin' theory or the 'polyphenol' theory. A review of such theories can be found in a monograph of Davies and Ghabbour 1999. Nowadays, most investigators suppose that humic substances originated in lignin (Oglesby et al 1967).…”

Section: Where Do Humic Substances Come From?mentioning

confidence: 99%

Humic substances - compounds of still unknown structure: applications in agriculture, industry, environment, and biomedicine

Peña‐Méndez¹,

Havel²,

Patočka³

2005

J Appl Biomed

306

173

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Humic substances as part of humus-soil organic matter-are compounds arising from the physical, chemical and microbiological transformation (humification) of biomolecules. They are important because they constitute the most ubiquitous source of non-living organic material that nature knows. Approximately 80% of the total carbon in terrestrial media and 60% of the carbon dissolved in aquatic media are made up of humic substances. Humic substances have important roles in soil fertility, and are considered to have primal relevance for the stabilization of soil aggregates. They can be divided into three components according to their solubility: humic acids, fulvic acids and humin. Humic acids are the most explored group of humic substances. Beyond their relevance for life these substances have industrial applications in the development of absorbents to be used at the sources of metal-poisoning. Being natural substances, their purification process is cheaper than the synthesis of any other sorbent and, moreover, due to their high operability, they absorb more than the absorbents used to date, such as active charcoals or clays. The specific properties of humic acid products enable their application in industry, agriculture, environmental and biomedicine.

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The Biotransformation of Lignin to Humus—Facts and Postulates

Cited by 18 publications

References 15 publications

Microbial Degradation of Lignocellulose: the Lignin Component

Microbial Degradation of Lignocellulose: the Lignin Component

Degradation of Coal by the Fungi Polyporus versicolor and Poria monticola

Humic substances - compounds of still unknown structure: applications in agriculture, industry, environment, and biomedicine

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