气候变化领域集成服务门户(CCPortal): Plant ecological genomics at the limits of life in the Atacama Desert

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DOI	10.1073/pnas.2101177118
	Plant ecological genomics at the limits of life in the Atacama Desert
	Eshel G.; Araus V.; Undurraga S.; Soto D.C.; Moraga C.; Montecinos A.; Moyano T.; Maldonado J.; iaz F.P.; Varala K.; Nelson C.W.; Contreras-Lopez O.; Pal-Gabor H.; Kraiser T.; Carrasco-Puga G.; Nilo-Poyanco R.; Zegar C.M.; Orellana A.; Montecino M.; Maass A.; Allende M.L.; DeSalle R.; Stevenson D.W.; Gonzalez M.; Latorre C.; Coruzzi G.M.; Gutierrez R.A.
发表日期	2021
ISSN	0027-8424
卷号	118 期号:46
英文摘要	The Atacama Desert in Chile-hyperarid and with high-ultraviolet irradiance levels-is one of the harshest environments on Earth. Yet, dozens of species grow there, including Atacama-endemic plants. Herein, we establish the Talabre-Lejia transect (TLT) in the Atacama as an unparalleled natural laboratory to study plant adaptation to extreme environmental conditions. We characterized climate, soil, plant, and soil-microbe diversity at 22 sites (every 100 m of altitude) along the TLT over a 10-y period. We quantified drought, nutrient deficiencies, large diurnal temperature oscillations, and pH gradients that define three distinct vegetational belts along the altitudinal cline. We deep-sequenced transcriptomes of 32 dominant plant species spanning the major plant clades, and assessed soil microbes by metabarcoding sequencing. The top-expressed genes in the 32 Atacama species are enriched in stress responses, metabolism, and energy production. Moreover, their root-associated soils are enriched in growthpromoting bacteria, including nitrogen fixers. To identify genes associated with plant adaptation to harsh environments, we compared 32 Atacama species with the 32 closest sequenced species, comprising 70 taxa and 1,686,950 proteins. To perform phylogenomic reconstruction, we concatenated 15,972 ortholog groups into a supermatrix of 8,599,764 amino acids. Using two codonbased methods, we identified 265 candidate positively selected genes (PSGs) in the Atacama plants, 64% of which are located in Pfam domains, supporting their functional relevance. For 59/184 PSGs with an Arabidopsis ortholog, we uncovered functional evidence linking them to plant resilience. As some Atacama plants are closely related to staple crops, these candidate PSGs are a "genetic goldmine" to engineer crop resilience to face climate change. © 2021 National Academy of Sciences. All rights reserved.
英文关键词	Adaptation; Desert; Evolution; Microbiome; Stress
语种	英语
scopus关键词	Arabidopsis; Article; Chile; climate; desert; drought; evolution; gene expression; genomics; microbial diversity; nonhuman; plant ecology; plant gene; plant genetics; plant metabolism; plant nutrient; plant stress; soil; soil acidity; soil microflora; temperature; altitude; climate change; desert climate; ecosystem; genetics; genomics; microbiology; phylogeny; plant; procedures; Altitude; Chile; Climate Change; Desert Climate; Ecosystem; Genomics; Phylogeny; Plants; Soil; Soil Microbiology
来源期刊	Proceedings of the National Academy of Sciences of the United States of America
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/250986
作者单位	Center for Genomics and Systems Biology, Department of Biology, New York University, New York, NY 10003, United States; Fondo de Desarrollo de Areas Prioritarias (FONDAP) Center for Genome Regulation, Santiago, 8370415, Chile; Agencia Nacional de Investigacion y Desarrollo (ANID)-Millennium Science Initiative Program-Millennium Institute for Integrative Biology (iBio), Departamento de Genetica Molecular y Microbiologia, Facultad de Ciencias Biologicas, Pontificia Universidad Catolica de Chile, Santiago, 7500565, Chile; Department of Horticulture and Landscape Architecture, Purdue University, West Lafayette, IN 47907, United States; Institute for Comparative Genomics, American Museum of Natural History, New York, NY 10024-5102, United States; Centro de Biotecnologia Vegetal, Universidad Andres Bello, Santiago, 8370146, Chile; Instituto de Ciencias Biomedicas, Facultad de Medicina, Universidad Andres Bello, Santiago, 8370146, Chile; Center for Mathematical Modeling (AFB 170001), Facultad de Ciencias Fisi...
推荐引用方式 GB/T 7714	Eshel G.,Araus V.,Undurraga S.,et al. Plant ecological genomics at the limits of life in the Atacama Desert[J],2021,118(46).
APA	Eshel G..,Araus V..,Undurraga S..,Soto D.C..,Moraga C..,...&Gutierrez R.A..(2021).Plant ecological genomics at the limits of life in the Atacama Desert.Proceedings of the National Academy of Sciences of the United States of America,118(46).
MLA	Eshel G.,et al."Plant ecological genomics at the limits of life in the Atacama Desert".Proceedings of the National Academy of Sciences of the United States of America 118.46(2021).