Biochemical and biophysical drivers of the hydrogen isotopic composition of carbohydrates and acetogenic lipids.

ABSTRACT: 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 d

SUBMITTER: Lehmann MM 

PROVIDER: S-EPMC11235168 | biostudies-literature | 2024 Jul

REPOSITORIES: biostudies-literature