干旱区生态环境知识资源中心(Arid): Leaf wax composition and distribution of Tillandsia landbeckii reflects moisture gradient across the hyperarid Atacama Desert

Arid

DOI	10.1007/s00606-021-01800-0
	Leaf wax composition and distribution of Tillandsia landbeckii reflects moisture gradient across the hyperarid Atacama Desert
	Contreras, Sergio; Landahur, Manlio; Garcia, Karla; Latorre, Claudio; Reyers, Mark; Rethemeyer, Janet; Jaeschke, Andrea
通讯作者	Contreras, S (corresponding author)，Univ Catolica Santisima Concepcion, Fac Ciencias, Dept Quim Ambiental, Concepcion, Chile. ; Contreras, S (corresponding author)，Ctr Invest Biodiversidad & Ambientes Sustentables, CIBAS, Concepcion, Chile. ; Jaeschke, A (corresponding author)，Univ Cologne, Inst Geol & Mineral, Cologne, Germany.
来源期刊	PLANT SYSTEMATICS AND EVOLUTION
ISSN	0378-2697
EISSN	1615-6110
出版年	2022
卷号	308 期号:1
英文摘要	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 mu g/g) up to three times higher than fatty acids (66.7 +/- 40.7 mu g/g), likely as an adaptation to the hyperarid environment. 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 moisture 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.
英文关键词	Atacama desert Fatty acids Fog ecosystems Leaf-wax n-alkanes Tillandsia landbeckii
类型	Article
语种	英语
开放获取类型	hybrid
收录类别	SCI-E
WOS记录号	WOS:000739392800001
WOS关键词	N-ALKANE DISTRIBUTIONS ; ARAUCARIA-ARAUCANA ; EPICUTICULAR WAX ; CUTICLE LIPIDS ; DELTA-D ; PLANTS ; BIOSYNTHESIS ; BROMELIACEAE ; COASTAL ; FOG
WOS类目	Plant Sciences ; Evolutionary Biology
WOS研究方向	Plant Sciences ; Evolutionary Biology
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/376487
作者单位	[Contreras, Sergio; Landahur, Manlio] Univ Catolica Santisima Concepcion, Fac Ciencias, Dept Quim Ambiental, Concepcion, Chile; [Contreras, Sergio] Ctr Invest Biodiversidad & Ambientes Sustentables, CIBAS, Concepcion, Chile; [Garcia, Karla] Consorcio Eolico, Desarrollo Proyectos Energias Renovables, Concepcion, Chile; [Latorre, Claudio] Ctr UC Desierto Atacama, Santiago, Chile; [Latorre, Claudio] Pontificia Univ Catolica Chile, Dept Ecol, Santiago, Chile; [Latorre, Claudio] Inst Ecol Biodiversidad IEB, Casilla 653, Santiago, Chile; [Reyers, Mark] Univ Cologne, Inst Geophys & Meteorol, Cologne, Germany; [Rethemeyer, Janet; Jaeschke, Andrea] Univ Cologne, Inst Geol & Mineral, Cologne, Germany
推荐引用方式 GB/T 7714	Contreras, Sergio,Landahur, Manlio,Garcia, Karla,et al. Leaf wax composition and distribution of Tillandsia landbeckii reflects moisture gradient across the hyperarid Atacama Desert[J],2022,308(1).
APA	Contreras, Sergio.,Landahur, Manlio.,Garcia, Karla.,Latorre, Claudio.,Reyers, Mark.,...&Jaeschke, Andrea.(2022).Leaf wax composition and distribution of Tillandsia landbeckii reflects moisture gradient across the hyperarid Atacama Desert.PLANT SYSTEMATICS AND EVOLUTION,308(1).
MLA	Contreras, Sergio,et al."Leaf wax composition and distribution of Tillandsia landbeckii reflects moisture gradient across the hyperarid Atacama Desert".PLANT SYSTEMATICS AND EVOLUTION 308.1(2022).