Leaf wax composition and distribution of Tillandsia landbeckii reflects moisture gradient across the hyperarid Atacama Desert
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| Title: | Main Title: Leaf wax composition and distribution of Tillandsia landbeckii reflects moisture gradient across the hyperarid Atacama Desert |
| Description: | Abstract: In the hyperarid Atacama Desert, water availability plays a crucial role in allowing plant survival. Along with scant rainfall, marine advective fog frequently occurs along the coastal escarpment fueling isolated mono-specific patches of Tillandsia vegetation. In this study, we investigate the lipid biomarker composition of the bromeliad Tillandsia landbeckii (CAM plant) to assess structural adaptations at the molecular level as a response to extremely arid conditions. We analyzed long-chain n-alkanes and fatty acids in living specimens (n = 59) collected from the main Tillandsia dune ecosystems across a 350 km coastal transect. We found that the leaf wax composition was dominated by n-alkanes with concentrations (total average 160.8 ± 91.4 μg/g) up to three times higher than fatty acids (66.7 ± 40.7 μg/g), likely as an adaptation to the hyperarid envi- ronment. Significant differences were found in leaf wax distribution (Average Chain Length [ACL] and Carbon Preference Index [CPI]) in the northern zone relative to the central and southern zones. We found strong negative correlations between fatty acid CPI and n-alkane ACL with precipitation and surface evaporation pointing at fine-scale adaptations to low mois- ture availability along the coastal transect. Moreover, our data indicate that the predominance of n-alkanes is reflecting the function of the wax in preventing water loss from the leaves. The hyperarid conditions and good preservation potential of both n-alkanes and fatty acids make them ideal tracers to study late Holocene climate change in the Atacama Desert. |
| Citation Advice: | Contreras S, Landahur M, García K, Latorre C, Reyers M, Rethemeyer J, Jaeschke A (2022). Leaf wax composition and distribution of Tillandsia landbeckii reflects moisture gradient across the hyperarid Atacama Desert. Plant Systematics and Evolution 308:8. https://doi.org/10.1007/s00606-021-01800-0 |
Responsible Party
| Creators: | Sergio Contreras (Author), Manlio Landahur (Author), Karla García (Author), Claudio Latorre (Author), Mark Reyers (Author), Janet Rethemeyer (Author), Andrea Jaeschke (Author) |
| Publisher: | Springer |
| Publication Year: | 2022 |
Topic
| CRC1211 Topic: | Biology |
| Related Subprojects: | D4, A3 |
| Subject: | Keyword: Paleoclimate Proxies |
| Geogr. Information Topic: | Biota |
File Details
| Filename: | Contreras2022.pdf |
| Data Type: | Data Paper - Publication |
| File Size: | 1.5 MB |
| Date: | Available: 06.01.2022 |
| Mime Type: | application/pdf |
| Data Format: | |
| Language: | English |
| Status: | Completed |
Constraints
| Download Permission: | Free |
| General Access and Use Conditions: | According to the CRC1211DB data policy agreement. |
| Access Limitations: | According to the CRC1211DB data policy agreement. |
| Licence: | [Creative Commons] Attribution 4.0 International (CC BY 4.0) |
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Specific Information - Publication
| Publication Status: | Published |
| Review Status: | Peer reviewed |
| Publication Type: | Article |
| Article Type: | Journal |
| Source: | Plant Systematics and Evolution |
| Source Website: | https://link.springer.com/article/10.1007%2Fs00606-021-01800-0 |
| Issue: | 8 |
| Volume: | 308 |
| Number of Pages: | 13 (1 - 13) |
Metadata Details
| Metadata Creator: | Andrea Jaeschke |
| Metadata Created: | 07.01.2022 |
| Metadata Last Updated: | 27.01.2022 |
| Subproject: | D4 |
| Funding Phase: | 2 |
| Metadata Language: | English |
| Metadata Version: | V50 |
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| Page Visits: | 129 |
| Metadata Downloads: | 0 |
| Dataset Downloads: | 4 |
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