Investigations on the Amounts of Hexosamines Found in Various Soils and Methods for Their Determination

Sowden, F. J.

doi:10.1097/00010694-195988030-00004

Cited by 50 publications

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“…For personal use only. (Sowden, 1959;Bremner, 1965b (Bremner, 1965b Gupta and Reuszer (196'7) found no qualitative differences in the amino acid contents of soils under various cropping systems, but noted substantial quantitative difterences. Stevenson (1956) In general, the data indicated that glycine and aspartic acid were present in the largest amounts, with slightly smaller amounts of alanine and glutamic acid.…”

Section: Introductionmentioning

confidence: 99%

Nitrogen Fractions in a Gray Wooded Soil as Influenced by Long-Term Cropping Systems and Fertilizers

Khan¹

1971

Can. J. Soil. Sci.

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Section: Introductionmentioning

confidence: 99%

Nitrogen Fractions in a Gray Wooded Soil as Influenced by Long-Term Cropping Systems and Fertilizers

Khan¹

1971

Can. J. Soil. Sci.

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“…Fungal chitin and bacterial peptidoglycans provide the greatest source of amino sugars in soils, with only minor contribution from the chitin of the invertebrate exoskeleton (Parsons, 1981). Several authors investigated the amino sugar contents of organic soils and forest humus layers (Sowden, 1959;Ivarson, 1959, 1974;Sowden et al, 1978;Lowe, 1973). From these studies it is evident, that amino sugars can be used to characterize microbial activity in forest humus layers.…”

Section: Introductionmentioning

confidence: 99%

“…From these studies it is evident, that amino sugars can be used to characterize microbial activity in forest humus layers. The relative importance of bacteria and fungi in the decomposition process is estimated by the glucosamine/galactosamine ratio, a low glucosamine/ galactosamine ratio being indicative for a high population of bacteria (Sowden, 1959).…”

Section: Introductionmentioning

confidence: 99%

Amino sugar determination in organic soils by capillary gas chromatography using a nitrogen‐selective detector

Kögel

Bochter

1985

J Plant Nutrition & Soil

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A method is described for the analysis of amino sugars in humus layers by capillary gas liquid chromatography. After acid hydrolysis and reduction, amino sugar alcohols are baseline separated as their trifluoroacetates. Hexosamines are selectively detected using a nitrogen-specific, flameless thermoionic detector and quantified with p-aminophenol HCI as internal standard. This procedure is applied to determine the amino sugar contents and hence to characterize the relative role of fungi and bacteria in the decomposition process in a Lithic Borofolist. Kapillargaschromstogphlsche Bestimmung von Aminozuckern in organischen Boden mit einem stickstoffspezfischen DetektorEs wird eine kapillargaschromatographische Methode zur Bestimmung von Aminozuckern in Humusauflagen beschrieben. Die hydrolysierten, reduzierten Aminozucker werden als Trifluoracetate getrennt. Die quantitative Bestimmung der Hexosamine erfolgt selektiv mit einem stickstoffspezifischen Detektor und p-Aminophenol HCI als internem Standard. An einem Beispiel (Lithic Borofolist) werden die Tiefenfunktionen der Aminozucker und damit die relativen Anteile von Pilzen und Bakterien am AbbauprozeS diskutiert.

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“…This may not be restricted to dead hyphae, as there is evidence that streptomycetes can lyse live mycelium (Lloyd et al, 1965;Lloyd & Lockwood, 1966). Glucosamine is the predominant hexosamine in soil hydrolysates, and this is particularly so in podzols under coniferous litter (Sowden, 1959). As fungi predominate in such acidic soils, it is likely that most of the glucosamine is derived from chitin in their walls.…”

Section: Discussionmentioning

confidence: 99%

The Role of Streptomycetes in Decomposition of Chitin in Acidic Soils

Williams

Robinson

1981

Microbiology

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The influence of pH on chitin hydrolysis by streptomycetes from a range of acidic and neutral soils was studied in vitro in an acid soil. On the basis of activity ranges and optima for chitin hydrolysis, acidophilic, acidoduric and neutrophilic categories of streptomycetes were tiistinguished; these categories were broadly related to the pH requirements for growth. Responses of streptomycetes to chitin amendment of acidic organic and mineral horizons of a pine forest soil were studied. Acidophiles were involved in the decomposition process and the resulting ammonification led subsequently to activity of neutrophiles. This succession was particularly marked in the poorly buffered mineral horizon. Similar, but smaller, responses occurred when the horizons were amended with mycelium from basidiomycete sporocarps.The role of streptomycetes in decomposition of fungal chitin in acidic litters and soils is discussed.

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Investigations on the Amounts of Hexosamines Found in Various Soils and Methods for Their Determination

Cited by 50 publications

References 0 publications

Nitrogen Fractions in a Gray Wooded Soil as Influenced by Long-Term Cropping Systems and Fertilizers

Nitrogen Fractions in a Gray Wooded Soil as Influenced by Long-Term Cropping Systems and Fertilizers

Amino sugar determination in organic soils by capillary gas chromatography using a nitrogen‐selective detector

The Role of Streptomycetes in Decomposition of Chitin in Acidic Soils

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