Contrasting diagenetic pathways of higher plant triterpenoids in buried wood as a function of tree species

Schnell, Gilles; Schaeffer, Philippe; Tardivon, Hervé; Motsch, Estelle; Connan, Jacques; Ertlen, Damien; Schwartz, Dominique; Schneider, Nathalie; Adam, Pierre

doi:10.1016/j.orggeochem.2013.11.001

Cited by 23 publications

(14 citation statements)

References 64 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…This is consistent with the report of betulinic acid, betulin and methyl-3β-acetoxy-lup-22(29)-en-28-oate (db1, db3 and db4, respectively) in Betula spp bark by Schnell et al (2013). In B. pendula samples (leaves and bark), betulin was overexpressed compared to lupeol (tp6).…”

Section: Specificity Of Compounds In Soil Samplessupporting

confidence: 92%

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

Zocatelli¹,

Jacob²,

Gogo³

et al. 2014

Organic Geochemistry

View full text Add to dashboard Cite

Section: Specificity Of Compounds In Soil Samplessupporting

confidence: 92%

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

Zocatelli¹,

Jacob²,

Gogo³

et al. 2014

Organic Geochemistry

View full text Add to dashboard Cite

“…Betulin is abundant in birch wood [ Schnell et al ., ] and has been used as a tracer of peat‐derived organic matter in coastal sediments [ Volkman et al ., ], or even as a tracer of mangrove‐derived organic matter in sediments in tropical areas [ Koch et al ., , ]. While a number of oxidation products have been identified, we will only be looking at lupan‐20‐one‐3β,28‐diol here, since it is specific to autoxidation [ Galeron et al ., ].…”

Section: Methodsmentioning

confidence: 99%

Autoxidation as a major player in the fate of terrestrial particulate organic matter in seawater

et al. 2017

View full text Add to dashboard Cite

The Rhône River plays a major role in the Mediterranean Sea, being both its main freshwater source and its major particulate matter provider. This survey of the fate of terrestrial particulate organic matter (POM) was conducted along the salinity gradient of the Rhône River plume, between 2012 and 2014. It revealed that autoxidation acts rapidly and intensely upon the POM's arrival at sea, with α‐amyrin and β‐amyrin autoxidation rates going from 12.9 ± 2.9% to 45.0 ± 6.4% and 10.7 ± 4.0% to 50.3 ± 4.4%, respectively, between fresh water (salinity 0) and seawater (salinity 38). These compounds, being unambiguous markers of the terrestrial origin of POM, allow us to unequivocally characterize the POM as terrestrial. While it was originally believed that a desorption of redox‐active trace metal ions was the favoring factor that kick‐started this intense autoxidation, this study evidences no trace metal desorption in the Rhône River mixing zone and hence no correlation between high autoxidation rates and the presence of trace metal ions. Autoxidation rates however were very well correlated with salinity levels within the river plume, with r2 reaching 0.801, 0.962, and 0.943 for sitosterol, α‐amyrin, and β‐amyrin, respectively, in November 2014.

show abstract

“…Plant biomarkers, such as diterpenoids, higher plant triterpenoids and leaf wax n-alkyl components, are useful for paleovegetation and paleoclimate research. For example, plant-derived terpenoids have been used extensively to understand the timing of the rise of angiosperms, as paleovegetation proxies and as chemotaxonomic indicators (Moldowan et al, 1994;Otto et al, 1997Otto et al, , 2005Otto and Simoneit, 2001;Bechtel et al, 2002Bechtel et al, , 2008Hautevelle et al, 2006b;Taylor et al, 2006;Diefendorf et al, 2011;Schnell et al, 2014). Other studies have focused on plant leaf wax components, such as n-alkanes and n-alkanoic acids, and their carbon isotope signatures have been used to understand past change in the carbon cycle (e.g.…”

Section: Introductionmentioning

confidence: 99%

Effect of thermal maturation on plant-derived terpenoids and leaf wax n-alkyl components

Diefendorf

Sberna

Taylor

2015

Organic Geochemistry

View full text Add to dashboard Cite

Plant biomarkers, such as terpenoids and leaf wax components (n-alkanes, n-alkanoic acids and nalkanols), are frequently found in sediments and can be used, often in association with stable carbon (and hydrogen) isotope measurements, as paleovegetation and paleoclimate proxies. However, few controlled studies have monitored plant biomarker alteration to determine if certain plant biomarkers are preferentially lost relative to more recalcitrant forms.To investigate the role of selective alteration and degradation of plant biomarkers, hydrous pyrolysis was used to artificially mature leaves from four plant species, including the deciduous angiosperms Acer rubrum and Platanus occidentalis, the deciduous conifer Taxodium distichum and the evergreen conifer Pinus sylvestris. Leaves were artificially matured at temperatures ranging from 150 to 330 °C for 72 h to simulate maturation. With increasing temperature, functionalized di-and triterpenoidyields decreased, with a greater loss of triterpenoids at lower temperature. Both diterpene and triterpene yield increased during maturation up to 310 to 320 ºC. A greater amount of diterpenes and triterpenes was generated for P. sylvestris and A. rubrum, respectively, and might be related to differences in terpenoid starting composition. Terpenols were preferentially converted to terpenes over terpenoic acids. Taken together, hydrous pyrolysis of plant biomarkers indicates that paleovegetation reconstruction from terpenoids can be informative, but only as a qualitative vegetation proxy. The n-alkane yield largely increased up to 320 ºC,whereas the n-alkanol yiels mainly decreased with increased maturity. The n-alkanoic acids initially increased, but then decreased. The stable carbon isotopic composition (δ 13 C) of the n-alkanes was generally, though not universally, constant up to 200 ºC. Above this, the δ 13 C values of individual chain length hydrocarbons, for some species, changed by ca. 2‰. This suggests that n-alkane δ 13 C values should be unaltered in immature rocks, but can vary in the catagenic stage of maturation (oil window).

show abstract

Contrasting diagenetic pathways of higher plant triterpenoids in buried wood as a function of tree species

Cited by 23 publications

References 64 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

Autoxidation as a major player in the fate of terrestrial particulate organic matter in seawater

Effect of thermal maturation on plant-derived terpenoids and leaf wax n-alkyl components

Contact Info

Product

Resources

About