Decomposition in soil and chemical characteristics of pollen

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doi: 10.1111/j.1365-2389.2008.01022.x
Authors:Webster, E. A.; Tilston, E. L.; Chudek, J. A.; Hopkins, D. W.
Author Affiliations:Primary:
University of Stirling, School of Biological and Environmental Sciences, Stirling, United Kingdom
Other:
University of Reading, United Kingdom
University of Dundee, United Kingdom
Volume Title:European Journal of Soil Science
Source:European Journal of Soil Science, 59(3), p.551-558. Publisher: Wiley-Blackwell on behalf of the British Society of Soil Science, and the National Societies of Soil Science in Europe, Oxford, United Kingdom. ISSN: 1351-0754
Publication Date:2008
Note:In English. 29 refs.; illus., incl. 2 tables
Summary:The input to soils made by pollen and its subsequent mineralization has rarely been investigated from a soil microbiological point of view even though the amount of C and N in pollen may make an important contribution to nutrient cycling. The relative resistance to decomposition of pollen exines (outer layers) has led to much of the focus of pollen in soil being on its preservation for archaeological and palaeo-ecological purposes. Aspects of the chemical composition and decomposition of pollen from birch (Betula alba) and maize (Zea mays) in soil has been examined. The relatively large N contents, small C-to-N ratios and large water-sol. contents of pollen from both species indicated that they would be readily mineralised in soil. When added to soil and incubated at 16°C an amount of C equivalent to 22-26% of the added pollen C was lost as CO2 within 22 days, with the Z. mays pollen decomposing faster. For B. alba pollen, the water-sol. fraction decomposed faster than the whole pollen and the insoluble fraction decomposed more slowly over 22 days. By contrast, there were no significant differences in the decomposition rates of the different fractions from Z. mays pollen. Solid-state 13 C NMR revealed no gross chemical differences between the pollen of these two species, with strong resonances in the alkyl- and methyl-C region (0-45 p.p.m.) indicative of aliphatic compounds, the O-alkyl-C (60-90 p.p.m.) and the acetal- and ketal-C region (90-110 p.p.m.) indicative of polysaccharides, and the carbonyl-C region indicative of peptides and carboxylic acids. In addition, both pollens gave a small but distinct resonance at 55 p.p.m. attributed to N-alkyl-C. The resonance attributed to polysaccharides were lost completely or substantially reduced after decomposition. [G.L.B.]
Subsections:Organic geochemistry; Petrology; weathering; soils
Subjects:Aliphatic hydrocarbons; Carbohydrates; Carbon; Carbon dioxide; Carboxylic acids; Chemical composition; Chemical properties; Degradation; Exine; Geochemical cycle; Hydrocarbons; Miospores; Nitrogen; NMR spectra; Nutrients; Organic acids; Organic compounds; Palynomorphs; Peptides; Podzols; Pollen; Polysaccharides; Soil treatment; Soils; Spectra; Statistical analysis; Europe; Great Britain; Scotland; United Kingdom; Western Europe; Decomposition; Seaton Scotland
Coordinates:N563400 N563400 W0023212 W0023212
Abstract Numbers:08M/2290
Record ID:2016108135
Copyright Information:GeoRef, Copyright 2019 American Geosciences Institute. Reference includes data from Mineralogical Abstracts, United Kingdom, Twickenham, United Kingdom
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072 7 |a 25  |2 georeft 
072 7 |a 02A  |2 georeft 
100 1 |a Webster, E. A.  |e analytic author  |u University of Stirling, School of Biological and Environmental Sciences, Stirling 
245 1 0 |a Decomposition in soil and chemical characteristics of pollen 
300 |a p. 551-558 
500 |a In English. 29 refs. 
500 |a Abstract number: 08M/2290 
500 |a Abstractor: G.L.B. 
500 |a Category Subsection: Organic geochemistry 
500 |a Category Subsection: Petrology; weathering; soils 
500 |a Affiliation: University of Stirling, School of Biological and Environmental Sciences; Stirling; GBR; United Kingdom 
500 |a Affiliation: University of Reading; ; GBR; United Kingdom 
500 |a Affiliation: University of Dundee; ; GBR; United Kingdom 
500 |a Key title: European Journal of Soil Science 
500 |a Source note: European Journal of Soil Science, 59(3), p.551-558. Publisher: Wiley-Blackwell on behalf of the British Society of Soil Science, and the National Societies of Soil Science in Europe, Oxford, United Kingdom. ISSN: 1351-0754 
500 |a Publication type: journal article 
504 |b 29 refs. 
510 3 |a GeoRef, Copyright 2019 American Geosciences Institute. Reference includes data from Mineralogical Abstracts, United Kingdom, Twickenham, United Kingdom 
520 |a The input to soils made by pollen and its subsequent mineralization has rarely been investigated from a soil microbiological point of view even though the amount of C and N in pollen may make an important contribution to nutrient cycling. The relative resistance to decomposition of pollen exines (outer layers) has led to much of the focus of pollen in soil being on its preservation for archaeological and palaeo-ecological purposes. Aspects of the chemical composition and decomposition of pollen from birch (Betula alba) and maize (Zea mays) in soil has been examined. The relatively large N contents, small C-to-N ratios and large water-sol. contents of pollen from both species indicated that they would be readily mineralised in soil. When added to soil and incubated at 16°C an amount of C equivalent to 22-26% of the added pollen C was lost as CO<2` within 22 days, with the Z. mays pollen decomposing faster. For B. alba pollen, the water-sol. fraction decomposed faster than the whole pollen and the insoluble fraction decomposed more slowly over 22 days. By contrast, there were no significant differences in the decomposition rates of the different fractions from Z. mays pollen. Solid-state 13 C NMR revealed no gross chemical differences between the pollen of these two species, with strong resonances in the alkyl- and methyl-C region (0-45 p.p.m.) indicative of aliphatic compounds, the O-alkyl-C (60-90 p.p.m.) and the acetal- and ketal-C region (90-110 p.p.m.) indicative of polysaccharides, and the carbonyl-C region indicative of peptides and carboxylic acids. In addition, both pollens gave a small but distinct resonance at 55 p.p.m. attributed to N-alkyl-C. The resonance attributed to polysaccharides were lost completely or substantially reduced after decomposition. 
650 7 |a Aliphatic hydrocarbons  |2 georeft 
650 7 |a Carbohydrates  |2 georeft 
650 7 |a Carbon  |2 georeft 
650 7 |a Carbon dioxide  |2 georeft 
650 7 |a Carboxylic acids  |2 georeft 
650 7 |a Chemical composition  |2 georeft 
650 7 |a Chemical properties  |2 georeft 
650 7 |a Degradation  |2 georeft 
650 7 |a Exine  |2 georeft 
650 7 |a Geochemical cycle  |2 georeft 
650 7 |a Hydrocarbons  |2 georeft 
650 7 |a Miospores  |2 georeft 
650 7 |a Nitrogen  |2 georeft 
650 7 |a NMR spectra  |2 georeft 
650 7 |a Nutrients  |2 georeft 
650 7 |a Organic acids  |2 georeft 
650 7 |a Organic compounds  |2 georeft 
650 7 |a Palynomorphs  |2 georeft 
650 7 |a Peptides  |2 georeft 
650 7 |a Podzols  |2 georeft 
650 7 |a Pollen  |2 georeft 
650 7 |a Polysaccharides  |2 georeft 
650 7 |a Soil treatment  |2 georeft 
650 7 |a Soils  |2 georeft 
650 7 |a Spectra  |2 georeft 
650 7 |a Statistical analysis  |2 georeft 
651 7 |a Europe  |2 georeft 
651 7 |a Great Britain  |2 georeft 
651 7 |a Scotland  |2 georeft 
651 7 |a United Kingdom  |2 georeft 
651 7 |a Western Europe  |2 georeft 
653 |a Decomposition 
653 |a Seaton Scotland 
700 1 |a Tilston, E. L.,  |e analytic author 
700 1 |a Chudek, J. A.,  |e analytic author 
700 1 |a Hopkins, D. W.,  |e analytic author 
773 0 |t European Journal of Soil Science  |d Oxford : Wiley-Blackwell on behalf of the British Society of Soil Science, and the National Societies of Soil Science in Europe, 2008  |x 1351-0754  |n European Journal of Soil Science, 59(3), p.551-558. Publisher: Wiley-Blackwell on behalf of the British Society of Soil Science, and the National Societies of Soil Science in Europe, Oxford, United Kingdom. ISSN: 1351-0754 Publication type: journal article  |g Vol. 59, no. 3  |h illus., incl. 2 tables 
856 |u urn:doi: 10.1111/j.1365-2389.2008.01022.x