Differences in chemical composition of soil organic matter in natural ecosystems from different climatic regions – A pyrolysis–GC/MS study

Vancampenhout, Karen; Wouters, Katinka; Vos, Bruno De; Buurman, P.; Swennen, Rudy; Deckers, Jozef

doi:10.1016/j.soilbio.2008.12.023

Cited by 107 publications

(91 citation statements)

References 75 publications

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“…The data were quantitatively expressed as relative intensity with respect to total measured intensity (e.g. Vancampenhout et al 2009). Relative intensity is…”

Section: Discussionmentioning

confidence: 99%

“…However, this approach can be helpful in the evaluation of broad patterns in plant chemistry. Here, we chose to group compounds into either functional or chemically descriptive groups that have frequently been used to categorize py-GC/MS compounds Vancampenhout et al 2009;Kaal et al 2007). These groups represent either important determinants in ecological function (lignin, polysaccharide, N-bearing, lipid) or are biochemically descriptive (non-lignin aromatic, phenol).…”

Section: Discussionmentioning

confidence: 99%

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Evaluation of angiosperm and fern contributions to soil organic matter using two methods of pyrolysis-gas chromatography-mass spectrometry

Stewart

2011

Plant Soil

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Background Ferns are an important plant group, and older phylogenies of non-polypod ferns contain relatively high concentrations of aliphatic leaf waxes, lignins, and tannins that could contribute to soil organic matter (SOM) biochemistry and stability. Methods Pyrolysis gas-chromatography massspectrometry (py-GC/MS) analyzes biochemical fragments which can be related to lignin, polysaccharide, lipid, nitrogen (N)-bearing, non-lignin aromatics, and phenol source compounds. Thermochemolysis using tetramethylammonium hydroxide (TMAH) combined with py-GC/MS improves detection of lignin, cutin, and suberin-derived compounds. To examine the advantages and disadvantages of both methods for characterizing plant and soil biochemistry, we characterized non-polypod and polypod fern and angiosperm live tissues, roots and soils from the Kohala Mountains, Hawaii. Results Py-GC/MS provided a broad biochemical overview of compound groups including lignin, polysaccharide, lipid, N-bearing, non-lignin aromatics and phenol groups while TMAH-py-GC/MS detailed lignin units and fatty acids at the expense of the other categories. TMAH-py-GC/MS provided more detailed data on lignin, cutin, suberin and tannin-derived compounds. Both methods detected differences in lignin units between species, although p-coumaric and ferulic acids, predominantly found in ferns, were only observed with TMAH-py-GC/MS. Conclusions Both py-GC/MS and TMAH-py-GC/MS are methods to detect compound-specific plant biomarkers, but are most useful when combined for their complimentary results.

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“…The data were quantitatively expressed as relative intensity with respect to total measured intensity (e.g. Vancampenhout et al 2009). Relative intensity is…”

Section: Discussionmentioning

confidence: 99%

Section: Discussionmentioning

confidence: 99%

Evaluation of angiosperm and fern contributions to soil organic matter using two methods of pyrolysis-gas chromatography-mass spectrometry

Stewart

2011

Plant Soil

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“…Reactions of O 3 on organic surfaces such as organic films (Donaldson et al, 2005), plant surfaces (Cape et al, 2009;Jud et al, 2016), and human skin (Liu et al, 2016(Liu et al, , 2017 have been reported previously. Soil organic matter and organic films are often rich in alkenes (Vancampenhout et al, 2009;Donaldson et al, 2005;Simpson et al, 2006), which undergo ozonolysis reactions in the presence of O 3 (Criegee, 1975;Wolff et al, 1997). Hydroxyalkyl hydroperoxides formed via the ozonolysis of alkenes can further decompose to alkanoic acids (Moortgat et al, 1997;Anglada et al, 2002;Hasson et al, 2003;.…”

Section: Alkanoic Acidsmentioning

confidence: 99%

Tropospheric sources and sinks of gas-phase acids in the Colorado Front Range

et al. 2018

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Abstract. We measured organic and inorganic gas-phase acids in the Front Range of Colorado to better understand their tropospheric sources and sinks using a high-resolution time-of-flight chemical ionization mass spectrometer. Measurements were conducted from 4 to 13 August 2014 at the Boulder Atmospheric Observatory during the Front Range Air Pollution and Photochemistry Éxperiment. Diurnal increases in mixing ratios are consistent with photochemical sources of HNO 3 , HNCO, formic, propionic, butyric, valeric, and pyruvic acid. Vertical profiles taken on the 300 m tower demonstrate net surface-level emissions of alkanoic acids, but net surface deposition of HNO 3 and pyruvic acid. The surface-level alkanoic acid source persists through both day and night, and is thus not solely photochemical. Reactions between O 3 and organic surfaces may contribute to the surface-level alkanoic acid source. Nearby traffic emissions and agricultural activity are a primary source of propionic, butyric, and valeric acids, and likely contribute photochemical precursors to HNO 3 and HNCO. The combined diel and vertical profiles of the alkanoic acids and HNCO are inconsistent with dry deposition and photochemical losses being the only sinks, suggesting additional loss mechanisms.

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“…Reactions of O3 on organic surfaces such as organic films (Donaldson et al, 2005), plant surfaces (Cape et al, 2009;Jud et al, 2016), and human skin (Liu et al, 2016;Liu et al, 2017) have been reported previously. Soil organic matter and organic films are often rich in alkenes (Vancampenhout et al, 2009;Donaldson et al, 2005;Simpson et al, 2006), 35 which undergo ozonolysis reactions in the presence of O3 (Criegee, 1975;Wolff et al, 1997). Hydroxyalkyl hydroperoxides formed via the ozonolysis of alkenes can further decompose to alkanoic acids (Moortgat et al, 1997;Anglada et al, 2002;Hasson et al, 2003;Millet et al, 2015).…”

Section: Alkanoic Acids 35mentioning

confidence: 99%