This years ASI meeting was organized by Christian Werner and Markus Weiler at the University of Freiburg. Members from the PPE group participated actively to this exciting meeting and shared their latest work with the stable isotope community. 

Estimating hydrogen isotope metabolic terms in the cellulose model by linear regression: kinetic isotope effects are more important than isotope exchange processes in autotrophic systems

Jochem Baan^1,2, Daniel Nelson², Ansgar Kahmen², Saša Bjelić¹, Meisha Holloway-Phillips^2,3

1: Advanced Analytics Platform – Laboratory for Energy Technologies and Innovation, Center for Energy and Environmental Sciences, Paul Scherrer Institute, Forschungsstrasse 111, 5232 Villigen, Switzerland; 2: University of Basel, Department of Environmental Sciences – Botany, Schönbeinstrasse 6, 4056 Basel, Switzerland; 3: ETH Zürich, Institute of Agricultural Sciences - Grassland Sciences, Universitätstrasse 2, 8092 Zürich, Switzerland

δ¹⁸O-derived root water uptake depth explains the drought sensitvitiy and vulnerability of temperate tree species 

David N. Steger¹, Richard L. Peters^1,2, Tobias Zhorzel¹, Raphael Dups¹, Günter Hoch¹, Daniel B. Nelson¹, Cedric Zahnd^1,8, David Basler¹, Katrin Meusburger^3,4, Fabian Bernhard⁵, Matthias Arend⁶, Bernhard Schuldt⁷, Ansgar Kahmen¹

1: University of Basel, Switzerland; 2: Technical University of Munich, Gemrany; 3: Swiss Federal Research Institute WSL; 4: ETH Zürich; 5: University of Bern; 6: Universität Trier; 7: Dresden University of Technology; 8: University of Antwerp

Assessing plant physiological responses to 150 years of rising atmospheric CO₂ using historical plant collections

Ansgar Kahmen, Daniel Nelson, Jurriaan de Vos, David Basler

University of Basel, Switzerland

Mechanistic models identify source water and leaf water effects in a European tree-ring cellulose oxygen isotope network

Daniel B. Nelson¹, Haoyu Diao², Matthias Saurer², Meisha Holloway-Phillips¹, Ansgar Kahmen¹, Kerstin Treydte², Marco M. Lehmann²

1: University of Basel, Switzerland; 2: Swiss Federal Institute for Forest, Snow and Landscape Research WSL

²H-enrichment of plant carbohydrates is not necessarily associated with a low-biomass “stress” state

Selina Hugger¹, Daniel Nelson¹, Ansgar Kahmen¹, Meisha Holloway-Phillips^1,2

1: University of Basel, Department of Environmental Sciences – Botany, Schönbeinstrasse 6, 4056 Basel, Switzerland; 2: ETH Zürich, Institute of Agricultural Sciences - Grassland Sciences, Universitätstrasse 2, 8092 Zürich, Switzerland

Hydrogen isotopes of fatty acids reflect the tricarboxylic acid cycle activity in bacterial two-species culture

S. Nemiah Ladd¹, Nathalie Amacker¹, Reto Wikjer², Laura K. Meredith³, Daniel B. Nelson¹

1: University of Basel, Switzerland; 2: ETH-Zurich, Switzerland; 3: University of Arizona, USA