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Full-Text Articles in Life Sciences
The 18O-Signal Transfer From Water Vapour To Leaf Water And Assimilates Varies Among Plant Species And Growth Forms, Marco M. Lehmann, Gregory R. Goldsmith, Cathleen Mirande-Ney, Rosemarie B. Weigt, Leonie Schönbeck, Ansgar Kahmen, Arthur Gessler, Rolf T.W. Siegwolf, Matthias Saurer
The 18O-Signal Transfer From Water Vapour To Leaf Water And Assimilates Varies Among Plant Species And Growth Forms, Marco M. Lehmann, Gregory R. Goldsmith, Cathleen Mirande-Ney, Rosemarie B. Weigt, Leonie Schönbeck, Ansgar Kahmen, Arthur Gessler, Rolf T.W. Siegwolf, Matthias Saurer
Biology, Chemistry, and Environmental Sciences Faculty Articles and Research
The 18O signature of atmospheric water vapour (δ18OV) is known to be transferred via leaf water to assimilates. It remains, however, unclear how the 18O‐signal transfer differs among plant species and growth forms. We performed a 9‐hr greenhouse fog experiment (relative humidity ≥ 98%) with 18O‐depleted water vapour (−106.7‰) on 140 plant species of eight different growth forms during daytime. We quantified the 18O‐signal transfer by calculating the mean residence time of O in leaf water (MRTLW) and sugars (MRTSugars) and related it to leaf traits and physiological …
Inferring Foliar Water Uptake Using Stable Isotopes Of Water, Gregory R. Goldsmith, Marco M. Lehmann, Lucas A. Cernusak, Matthias Arend, Rolf T.W. Siegwolf
Inferring Foliar Water Uptake Using Stable Isotopes Of Water, Gregory R. Goldsmith, Marco M. Lehmann, Lucas A. Cernusak, Matthias Arend, Rolf T.W. Siegwolf
Biology, Chemistry, and Environmental Sciences Faculty Articles and Research
A growing number of studies have described the direct absorption of water into leaves, a phenomenon known as foliar water uptake. The resultant increase in the amount of water in the leaf can be important for plant function. Exposing leaves to isotopically enriched or depleted water sources has become a common method for establishing whether or not a plant is capable of carrying out foliar water uptake. However, a careful inspection of our understanding of the fluxes of water isotopes between leaves and the atmosphere under high humidity conditions shows that there can clearly be isotopic exchange between the two …