Biochemical and biophysical drivers of the hydrogen isotopic composition of carbohydrates and acetogenic lipids
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Biochemical and biophysical drivers of the hydrogen isotopic composition of carbohydrates and acetogenic lipids. / Lehmann, Marco M; Schuler, Philipp; Werner, Roland A; Saurer, Matthias; Wiesenberg, Guido L B; Cormier, Marc-André.
in: SCI ADV, Jahrgang 10, Nr. 28, 12.07.2024, S. eadl3591.Publikationen: SCORING: Beitrag in Fachzeitschrift/Zeitung › SCORING: Zeitschriftenaufsatz › Forschung › Begutachtung
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TY - JOUR
T1 - Biochemical and biophysical drivers of the hydrogen isotopic composition of carbohydrates and acetogenic lipids
AU - Lehmann, Marco M
AU - Schuler, Philipp
AU - Werner, Roland A
AU - Saurer, Matthias
AU - Wiesenberg, Guido L B
AU - Cormier, Marc-André
PY - 2024/7/12
Y1 - 2024/7/12
N2 - The hydrogen isotopic composition (δ2H) of plant compounds is increasingly used as a hydroclimatic proxy; however, the interpretation of δ2H values is hampered by potential coeffecting biochemical and biophysical processes. Here, we studied δ2H values of water and carbohydrates in leaves and roots, and of leaf n-alkanes, in two distinct tobacco (Nicotiana sylvestris) experiments. Large differences in plant performance and biochemistry resulted from (a) soil fertilization with varying nitrogen (N) species ratios and (b) knockout-induced starch deficiency. We observed a strong 2H-enrichment in sugars and starch with a decreasing performance induced by increasing NO3-/NH4+ ratios and starch deficiency, as well as from leaves to roots. However, δ2H values of cellulose and n-alkanes were less affected. We show that relative concentrations of sugars and starch, interlinked with leaf gas exchange, shape δ2H values of carbohydrates. We thus provide insights into drivers of hydrogen isotopic composition of plant compounds and into the mechanistic modeling of plant cellulose δ2H values.
AB - The hydrogen isotopic composition (δ2H) of plant compounds is increasingly used as a hydroclimatic proxy; however, the interpretation of δ2H values is hampered by potential coeffecting biochemical and biophysical processes. Here, we studied δ2H values of water and carbohydrates in leaves and roots, and of leaf n-alkanes, in two distinct tobacco (Nicotiana sylvestris) experiments. Large differences in plant performance and biochemistry resulted from (a) soil fertilization with varying nitrogen (N) species ratios and (b) knockout-induced starch deficiency. We observed a strong 2H-enrichment in sugars and starch with a decreasing performance induced by increasing NO3-/NH4+ ratios and starch deficiency, as well as from leaves to roots. However, δ2H values of cellulose and n-alkanes were less affected. We show that relative concentrations of sugars and starch, interlinked with leaf gas exchange, shape δ2H values of carbohydrates. We thus provide insights into drivers of hydrogen isotopic composition of plant compounds and into the mechanistic modeling of plant cellulose δ2H values.
KW - Plant Leaves/chemistry
KW - Hydrogen/analysis
KW - Carbohydrates/chemistry
KW - Starch/chemistry
KW - Nicotiana/chemistry
KW - Lipids/analysis
KW - Plant Roots/chemistry
KW - Carbohydrate Metabolism
KW - Deuterium/chemistry
KW - Alkanes/analysis
KW - Water/chemistry
U2 - 10.1126/sciadv.adl3591
DO - 10.1126/sciadv.adl3591
M3 - SCORING: Journal article
C2 - 38985863
VL - 10
SP - eadl3591
JO - SCI ADV
JF - SCI ADV
SN - 2375-2548
IS - 28
ER -