Methoxy-serratenes in a soil under conifers and their potential use as biomarkers of Pinaceae

Milbeau, Claude Le; Lavrieux, Marlène; Jacob, Jérémy; Bréhéret, Jean‐Gabriel; Zocatelli, Renata; Disnar, Jean-Robert

doi:10.1016/j.orggeochem.2012.11.008

Cited by 14 publications

(15 citation statements)

References 73 publications

(65 reference statements)

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“…The present study is the first report of the occurrence of such compounds in peatland soils, although their definition as specific biomarkers of Pinaceae has been demonstrated for mineral soils (Le Milbeau et al, 2013a). In addition, we detected 3,21-dimethoxy-serrat-14-en-29-yl acetate (ms4), also assigned to Pinaceae (Le Milbeau et al, 2013b).…”

Section: Specificity Of Compounds In Soil Samplessupporting

confidence: 50%

Spatial variability of soil lipids reflects vegetation cover in a French peatland

Zocatelli¹,

Jacob²,

Gogo³

et al. 2014

Organic Geochemistry

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Section: Specificity Of Compounds In Soil Samplessupporting

confidence: 50%

Spatial variability of soil lipids reflects vegetation cover in a French peatland

Zocatelli¹,

Jacob²,

Gogo³

et al. 2014

Organic Geochemistry

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“…When functional groups are preserved, pentacyclic triterpenes allow a more precise distinction of their source organisms: at the family, genus or even species level (Jacob et al, 2005;Zocatelli et al, 2010;Lavrieux et al, 2011;Le Milbeau et al, 2013). This is not the case in Vasterival because the more polar fractions did not provide any oxygenated compounds.…”

Section: Origin Of Biomarkersmentioning

confidence: 99%

High frequency floral changes at the Paleocene–Eocene boundary revealed by comparative biomarker and palynological studies

Garel

Quesnel

Jacob

et al. 2014

Organic Geochemistry

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The Cap d'Ailly area (Upper Normandy, France) shows several terrestrial-lagoonal sections recording the negative Carbon Isotope Excursion (CIE) associated with the Paleocene-Eocene Thermal Maximum (PETM; 55.8 Ma). A study of the biomarkers and spores/pollen content of the Vasterival section gave complementary information on paleofloral changes that occurred around the PaleoceneEocene (P-E) boundary. Aliphatic hydrocarbon fractions revealed a high abundance of vascular plant biomarkers, including tricyclic diterpanes derived from conifers, fernenes derived from ferns and des-A-triterpenes derived from angiosperms. Whereas the vegetation of the depositional environment surroundings seemed alternately dominated by ferns and angiosperms (as revealed by biomarkers), the regional flora seemed strictly dominated by angiosperms such as Juglandaceae (as revealed by pollen).Spores/pollen assemblages reveal no major turnover in the paleovegetation, but slight variation in vegetation composition. However, both biomarkers and spores/pollen exhibited two intervals of rapid floral changes: the first occurred around the P-E boundary and the second at the top of the strictly terrestrial unit that coincides with a marine transgression. Comparison of these data with published paleoclimatic results, obtained from the same samples, indicated that the first interval of floral change was correlated with strong paleohydrological perturbations, whereas the second was linked to an increasing marine influence.

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“…-changes in vegetation composition inferred from extractable and/or ester-bound lipids of plant origin and/or their carbon isotopic composition (e.g., Huang et al, 1996;Zech et al, 2009a;Le Milbeau et al, 2013); -changes in climate, i.e., mean annual temperature and/or precipitation inferred from bacterial membrane lipids and/or the hydrogen isotopic composition of plantderived lipids (e.g., Weijers et al, 2006;Krull et al, 2006;Rao et al, 2009);…”

Section: Introductionmentioning

confidence: 99%

Opportunities and limitations related to the application of plant-derived lipid molecular proxies in soil science

Jansen

Wiesenberg

2017

SOIL

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Abstract. The application of lipids in soils as molecular proxies, also often referred to as biomarkers, has dramatically increased in the last decades. Applications range from inferring changes in past vegetation composition, climate, and/or human presence to unraveling the input and turnover of soil organic matter (SOM). The molecules used are extractable and non-extractable lipids, including ester-bound lipids. In addition, the carbon or hydrogen isotopic composition of such molecules is used. While holding great promise, the application of soil lipids as molecular proxies comes with several constraining factors, the most important of which are (i) variability in the molecular composition of plant-derived organic matter both internally and between individual plants, (ii) variability in (the relative contribution of) input pathways into the soil, and (iii) the transformation and/or (selective) degradation of (some of) the molecules once present in the soil. Unfortunately, the information about such constraining factors and their impact on the applicability of molecular proxies is fragmented and scattered. The purpose of this study is to provide a critical review of the current state of knowledge with respect to the applicability of molecular proxies in soil science, specifically focusing on the factors constraining such applicability. Variability in genetic, ontogenetic, and environmental factors influences plant n-alkane patterns in such a way that no unique compounds or specific molecular proxies pointing to, for example, plant community differences or environmental influences, exist. Other components, such as n-alcohols, n-fatty acids, and cutin-and suberin-derived monomers, have received far less attention in this respect. Furthermore, there is a high diversity of input pathways offering both opportunities and limitations for the use of molecular proxies at the same time. New modeling approaches might offer a possibility to unravel such mixed input signals. Finally, the transformation and turnover of SOM offer opportunities when tracing such processes is the purpose of applying a molecular proxy while imposing limitations when they obliterate the molecular proxy signals linked to other phenomena. For n-alkanes several modeling approaches have recently been developed to compensate for (selective) degradation. Still, such techniques are in their infancy and information about their applicability to classes of components other than n-alkanes is lacking. All constraining factors considered can have a significant influence on the applicability of molecular proxies in soil science. The degree of influence strongly depends on the type of molecular proxy and the environmental context in which it is applied. However, the potential impact of the constraining factors should always explicitly be addressed whenever molecular proxies are applied in a soil scientific context. More importantly, there is still a serious lack of available information, in particular for compound classes other than the n-alkanes. Therefore, we...

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Methoxy-serratenes in a soil under conifers and their potential use as biomarkers of Pinaceae

Cited by 14 publications

References 73 publications

Spatial variability of soil lipids reflects vegetation cover in a French peatland

Spatial variability of soil lipids reflects vegetation cover in a French peatland

High frequency floral changes at the Paleocene–Eocene boundary revealed by comparative biomarker and palynological studies

Opportunities and limitations related to the application of plant-derived lipid molecular proxies in soil science

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