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Seasonal variation of leaf wax n-alkane production and delta H-2 values from the evergreen oak tree, Quercus agrifolia
- In order to understand the timing of leaf wax synthesis in higher plants, we analysed the variability in leaf wax n-alkane concentration, composition (expressed as average chain length (ACL)), and delta H-2(wax) values as well as plant source water delta H-2 values (xylem and leaf water) in the evergreen tree Quercus agrifolia over a period of 9 months, beginning with leaf flush. We identified three distinct periods of leaf development with the first month following leaf flush being characterized by de novo synthesis and possibly removal of n-alkanes. During the following 3 months, n-alkane concentrations increased sevenfold and delta H-2(wax) and ACL values increased, suggesting this period was the major leaf wax n-alkane formation period. During the remaining 4 months of the experiment, stable values suggest cessation of leaf wax n-alkane formation. We find that n-alkane synthesis in Q. agrifolia takes place over 4 months, substantially longer than that observed for deciduous trees.
Author details: | Dirk SachseORCiDGND, Todd E. Dawson, Ansgar Kahmen |
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DOI: | https://doi.org/10.1080/10256016.2015.1011636 |
ISSN: | 1025-6016 |
ISSN: | 1477-2639 |
Pubmed ID: | https://pubmed.ncbi.nlm.nih.gov/25704898 |
Title of parent work (English): | Isotopes in environmental and health studies |
Publisher: | Routledge, Taylor & Francis Group |
Place of publishing: | Abingdon |
Publication type: | Article |
Language: | English |
Year of first publication: | 2015 |
Publication year: | 2015 |
Release date: | 2017/03/27 |
Tag: | hydrogen-2; isotope ecology; leaf wax; n-alkanes; oak tree |
Volume: | 51 |
Issue: | 1 |
Number of pages: | 19 |
First page: | 124 |
Last Page: | 142 |
Funding institution: | German Research Foundation (DFG) [DS1889/1-1]; ERC [279518] |
Organizational units: | Mathematisch-Naturwissenschaftliche Fakultät / Institut für Chemie |
Peer review: | Referiert |