| Title: | The (18) O-signal transfer from water vapour to leaf water and assimilates varies among plant species and growth forms |
| Author(s): | Lehmann MM; Goldsmith GR; Mirande-Ney C; Weigt RB; Schonbeck L; Kahmen A; Gessler A; Siegwolf RTW; Saurer M; |
| Address: | "Forest Dynamics, Swiss Federal Institute for Forest, Snow and Landscape Research (WSL), Birmensdorf, 8903, Switzerland. Schmid College of Science and Technology, Chapman University, Orange, CA, 92866. CIRAD, UPR Systemes de Perennes, Montpellier, 34398, France. Department of Environmental Sciences-Botany, University of Basel, Basel, 4056, Switzerland" |
| ISSN/ISBN: | 1365-3040 (Electronic) 0140-7791 (Linking) |
| Abstract: | "The (18) O signature of atmospheric water vapour (delta(18) O(V) ) is known to be transferred via leaf water to assimilates. It remains, however, unclear how the (18) O-signal transfer differs among plant species and growth forms. We performed a 9-hr greenhouse fog experiment (relative humidity >/= 98%) with (18) O-depleted water vapour (-106.7 per thousand) on 140 plant species of eight different growth forms during daytime. We quantified the (18) O-signal transfer by calculating the mean residence time of O in leaf water (MRT(LW) ) and sugars (MRT(Sugars) ) and related it to leaf traits and physiological drivers. MRT(LW) increased with leaf succulence and thickness, varying between 1.4 and 10.8 hr. MRT(Sugars) was shorter in C(3) and C(4) plants than in crassulacean acid metabolism (CAM) plants and highly variable among species and growth forms; MRT(Sugars) was shortest for grasses and aquatic plants, intermediate for broadleaf trees, shrubs, and herbs, and longest for conifers, epiphytes, and succulents. Sucrose was more sensitive to delta(18) O(V) variations than other assimilates. Our comprehensive study shows that plant species and growth forms vary strongly in their sensitivity to delta(18) O(V) variations, which is important for the interpretation of delta(18) O values in plant organic material and compounds and thus for the reconstruction of climatic conditions and plant functional responses" |
| Keywords: | Oxygen/metabolism Oxygen Isotopes/*metabolism Plant Development Plant Leaves/*metabolism Plants/*metabolism Poaceae/metabolism Rain Trees/metabolism Volatilization Water/*metabolism Weather carbohydrates clouds compound-specific isotope analysis (CSIA) fo; |
| Notes: | "MedlineLehmann, Marco M Goldsmith, Gregory R Mirande-Ney, Cathleen Weigt, Rosemarie B Schonbeck, Leonie Kahmen, Ansgar Gessler, Arthur Siegwolf, Rolf T W Saurer, Matthias eng 200020_166162/SNSF_/Swiss National Science Foundation/Switzerland Research Support, Non-U.S. Gov't 2019/11/17 Plant Cell Environ. 2020 Feb; 43(2):510-523. doi: 10.1111/pce.13682. Epub 2019 Dec 3" |
