globalchange  > 气候变化与战略
DOI: 10.1016/j.envexpbot.2019.103918
论文题名:
Elevational differentiation in metabolic cold stress responses of an endemic mountain tree
作者: Schrieber K.; Cáceres Y.; Engelmann A.; Marcora P.; Renison D.; Hensen I.; Müller C.
刊名: Environmental and Experimental Botany
ISSN: 988472
出版年: 2020
卷: 171
语种: 英语
英文关键词: Elevational gradient ; Frost ; GC–MS ; Global change ; Metabolomics ; Polylepis australis ; Population differentiation ; Restoration ; Sapling ; Tree
Scopus关键词: adaptation ; cold tolerance ; endemic species ; environmental gradient ; freezing ; frost ; gas chromatography ; global change ; mass spectrometry ; metabolism ; metabolite ; montane forest ; organic acid ; oxidative stress ; population distribution ; sapling ; sugar ; tree ; Polylepis australis
英文摘要: The decline of mountain forests under global change is alarming and conservation is challenged by the need to assemble populations able to deal with the predicted environmental shifts. Assessing intraspecific differentiation in stress susceptibility of tree species along elevational gradients is crucial to identify adequate genetic sources for mountain forest restoration. Here, we assessed injury and metabolic responses across cold stress intensity gradients in low and high elevation populations of the endangered mountain tree Polylepis australis. We hypothesized that populations from high elevational origins will show weaker increases of injury and more pronounced metabolic responses with rising cold stress intensity than low elevation populations. The expected differentiation among elevational origins was not observed for cold stress injury, but for metabolic stress responses. Plants responded to cold with enhanced concentrations of sugars, organic acids, amines and specialized metabolites with freezing point depressing, cryo-protective and anti-oxidative properties. As predicted, these responses were more pronounced and partially increased more strongly with stress intensity in high than low elevation populations, indicating local adaptation to a higher frequency and intensity of cold events at high elevations. We discuss the power of metabolomics approaches in unravelling intraspecific differentiation in tree stress resistance across small geographic scales as well as implications for future research on the evolution of cross-resistance to multiple stressors and for forest restoration. © 2019 Elsevier B.V.
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资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/158850
Appears in Collections:气候变化与战略

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作者单位: Kiel University, Institute for Ecosystem Research, Geobotany, Kiel, 24118, Germany; Bielefeld University, Faculty of Biology, Department of Chemical Ecology, Bielefeld, Germany; Martin-Luther-University Halle-Wittenberg, Institute of Biology, Geobotany & Botanical Garden, Halle (Saale), Germany; German Centre for Integrative Biodiversity Research (iDiv) Halle-Jena-Leipzig, Leipzig, Germany; National University of Cordoba, Institute for Multidisciplinary Plant Biology (IMBIV), Córdoba, Argentina; National Scientific and Technical Research Council, Instituto de Investigaciones Biológicas y Tecnologicas, (IIBYT - CONICET – Universidad Nacional de Córdoba), Córdoba, Argentina

Recommended Citation:
Schrieber K.,Cáceres Y.,Engelmann A.,et al. Elevational differentiation in metabolic cold stress responses of an endemic mountain tree[J]. Environmental and Experimental Botany,2020-01-01,171
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