Significant seasonal variation in the hydrogen isotopic composition of leaf-wax lipids for two deciduous tree ecosystems (Fagus sylvativa and Acer pseudoplatanus)

By D. Sachse, A. Kahmen, G. Gleixner. 2009

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Production of n-alkyl lipids in living plants and implications for the geologic past (2011, background): “Ontogenetic variation in n -alkane production within plants is complicated and presently not well described (Lockheart et al., 1997; Jetter and Scha ﬀ er, 2001; Samuels et al., 2008; Sachse et al., 2009).”
Leaf wax n-alkane distributions in and across modern plants: Implications for paleoecology and chemotaxonomy (2013, background): “(2013) demonstrate that isotopic values of leaf wax n-alkanes reflect the isotopic values of leaf water at the time of leaf formation, but other studies found that the isotopic composition of leaf wax n-alkanes changes through the growing season (Lockheart et al., 1997; Chikaraishi et al., 2004; Sac”
Molecular Paleohydrology: Interpreting the Hydrogen-Isotopic Composition of Lipid Biomarkers from Photosynthesizing Organisms (2012, background): “Other studies, however, indicate continued synthesis and rapid replacement of epicuticular waxes on mature leaves, especially during periods of stress, suggesting the potential for seasonally integrated isotopic signatures ( Jetter et al. 2006, Pedentchouk et al. 2008, Sachse et al. 2009).”
Leaf wax composition and carbon isotopes vary among major conifer groups (2015, background): “On the other hand, if leaf wax synthesis occurs throughout the growing season (Sachse et al., 2006, 2009), then stored sugars could be less important as source of pyruvate.”