气候变化领域集成服务门户(CCPortal): Subtle precipitation differences yield adaptive adjustments in the mesic Nothofagus dombeyi

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DOI	10.1016/j.foreco.2020.117931
	Subtle precipitation differences yield adaptive adjustments in the mesic Nothofagus dombeyi
	Diaz D.G.; Mathiasen P.; Premoli A.C.
发表日期	2020
ISSN	0378-1127
卷号	461
英文摘要	Climate change is impacting on natural systems and forests worldwide have suffered from massive mortality due to extreme droughts. That is the case of mesic Nothofagus dombeyi forests of northern Patagonia, whereas no climate-driven mortality was recorded towards drier areas. The aim was to examine population differences in relation to a small precipitation gradient at morphological, physiological, and genetic scales. Adaptive differences between seedlings collected from dry and mesic sites of N. dombeyi on the eastern slopes of the Andes were studied combining common garden and water stress manipulative experiments with genomic analyses. We recorded mortality, plant architectural and leaf traits during cultivation in the greenhouse. A set of plants were subjected to water deficit experiments and water potential was measured. Genomic differences were analyzed by Single Nucleotide Polymorphisms (SNPs). Plants from the mesic site grew taller with more branches and number of larger leaves, and greater stomatal density under optimum conditions yet with slightly more negative midday water potentials due to induced desiccation. Adaptive SNPs yielded similar divergence than quantitative traits which were greater than that of neutral SNPs. Five adaptive loci had a significant association to whole plant and leaf traits. These results show that in spite of the small climatic differences between sites and continuous gene flow populations showed adaptive adjustments and differed significantly in growth, ecophysiology, and genetically. This information can be used in climate-oriented restoration efforts. © 2020 Elsevier B.V.
英文关键词	Common garden; Drought; Genetic diversity; Growth; Plant architecture; SNPs; Water potential; Water stress
语种	英语
scopus关键词	Climate change; Drought; Forestry; Growth (materials); Physiology; Population statistics; Common garden; Genetic diversity; Plant architecture; SNPs; Water potential; Water stress; Plants (botany); cultivation; drought; gene flow; genetic marker; mortality; plant architecture; precipitation (climatology); tree; water stress; Drought; Experimentation; Forestry; Mortality; Nothofagus Dombeyi; Physiology; Plants; Water; Andes; Patagonia; Nothofagus dombeyi
来源期刊	Forest Ecology and Management
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/155406
作者单位	Universidad Nacional del Comahue – Centro Regional Universitario Bariloche, INIBIOMA – CONICET, Quintral 1250, Bariloche, 8400, Argentina
推荐引用方式 GB/T 7714	Diaz D.G.,Mathiasen P.,Premoli A.C.. Subtle precipitation differences yield adaptive adjustments in the mesic Nothofagus dombeyi[J],2020,461.
APA	Diaz D.G.,Mathiasen P.,&Premoli A.C..(2020).Subtle precipitation differences yield adaptive adjustments in the mesic Nothofagus dombeyi.Forest Ecology and Management,461.
MLA	Diaz D.G.,et al."Subtle precipitation differences yield adaptive adjustments in the mesic Nothofagus dombeyi".Forest Ecology and Management 461(2020).