Publication Details |
| Category | Text Publication |
| Reference Category | Journals |
| DOI | 10.1007/s00425-009-1038-8 |
| Title (Primary) | Water isotopes in desiccating lichens |
| Author | Hartard, B.; Cuntz, M.; Máguas, C.; Lakatos, M. |
| Source Titel | Planta |
| Year | 2009 |
| Department | CHS |
| Volume | 231 |
| Issue | 1 |
| Page From | 179 |
| Page To | 193 |
| Language | englisch |
| Keywords | Cryptogams; d18O discrimination; Isotope equilibration; Modelling; Vapour; Water exchange |
| Abstract | The stable isotopic composition of water is routinely used as a tracer to study water exchange processes in vascular plants and ecosystems. To date, no study has focussed on isotope processes in non-vascular, poikilohydric organisms such as lichens and bryophytes. To understand basic isotope exchange processes of non-vascular plants, thallus water isotopic composition was studied in various green-algal lichens exposed to desiccation. The study indicates that lichens equilibrate with the isotopic composition of surrounding water vapour. A model was developed as a proof of concept that accounts for the specific water relations of these poikilohydric organisms. The approach incorporates first their variable thallus water potential and second a compartmentation of the thallus water into two isotopically distinct but connected water pools. Moreover, the results represent first steps towards the development of poikilohydric organisms as a recorder of ambient vapour isotopic composition. |
| Persistent UFZ Identifier | https://www.ufz.de/index.php?en=20939&ufzPublicationIdentifier=10052 |
| Hartard, B., Cuntz, M., Máguas, C., Lakatos, M. (2009): Water isotopes in desiccating lichens Planta 231 (1), 179 - 193 10.1007/s00425-009-1038-8 |
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