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da Paschoa RP, Pinto VB, Pereira JP, Cavatte PC, Garbin ML, Godinho T, Xavier LR, Carrijo TT, Silveira V. Proteomic and physiological signatures of altitude adaptation in a Myrsine coriacea population under common garden conditions. J Proteomics 2024; 299:105156. [PMID: 38467267 DOI: 10.1016/j.jprot.2024.105156] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/23/2023] [Revised: 02/20/2024] [Accepted: 03/06/2024] [Indexed: 03/13/2024]
Abstract
Plants exhibit phenotypic plasticity in response to environmental variations, which can lead to stable genetic and physiological adaptations if exposure to specific conditions is prolonged. Myrsine coriacea demonstrates this through its ability to thrive in diverse environments. The objective of the article is to investigate potential differences in protein accumulation and physiological responses of M. coriacea by cultivating plants from seeds collected from four populations at different altitudes in a common garden experiment. Additionally, we aim to evaluate whether these differences exhibit genetic fixation. Through integrated physiological and proteomic analyses, we identified 170 differentially accumulated proteins and observed significant physiological differences among the populations. The high-altitude population (POP1) exhibited a unique proteomic profile with significant down-regulation of proteins involved in carbon fixation and energy metabolism, suggesting a potential reduction in photosynthetic efficiency. Physiological analyses showed lower leaf nitrogen content, net CO2 assimilation rate, specific leaf area, and relative growth rate in stem height for POP1, alongside higher leaf carbon isotopic composition (δ13C) and leaf carbon (C) content. These findings provide insight into the complex interplay between proteomic and physiological adaptations in M. coriacea and underscore the importance of local adaptations. SIGNIFICANCE: We investigate the adaptive responses of M. coriacea, a shrub with a broad phenotypic range, by cultivating plants from seeds collected at four different altitudes in a common garden experiment. These findings provide insight into the complex interplay between proteomic and physiological adaptations in M. coriacea and underscore the importance of local adaptations in the face of climate change. This study contributes to advancing our understanding of the influence of altitude-specific selection pressures on the molecular biology and physiology of plants in natural populations. Our findings provide valuable insights that enhance our ability to predict and comprehend how plants respond to climate change.
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Affiliation(s)
- Roberta Pena da Paschoa
- Laboratório de Biotecnologia, Centro de Biociências e Biotecnologia (CBB), Universidade Estadual do Norte Fluminense Darcy Ribeiro (UENF), Av. Alberto Lamego, 2000, Campos dos Goytacazes, RJ 28013-602, Brazil; Unidade de Biologia Integrativa, Setor de Genômica e Proteômica, UENF, Brazil
| | | | - Jéssica Priscilla Pereira
- Universidade Federal do Espírito Santo, Centro de Ciências Exatas, Naturais e da Saúde, Depto. Biologia, Lab. Botânica, Alto Universitário, Guararema, Alegre, ES, Brazil
| | - Paulo Cezar Cavatte
- Universidade Federal do Espírito Santo, Centro de Ciências Exatas, Naturais e da Saúde, Depto. Biologia, Lab. Botânica, Alto Universitário, Guararema, Alegre, ES, Brazil
| | - Mário Luís Garbin
- Universidade Federal do Espírito Santo, Centro de Ciências Exatas, Naturais e da Saúde, Depto. Biologia, Lab. Botânica, Alto Universitário, Guararema, Alegre, ES, Brazil
| | - Tiago Godinho
- Reserva Natural Vale, Rodovia BR 101, km 122 s/n Zona Rural, Linhares, ES 29900-111, Brazil
| | - Lucas Rodrigues Xavier
- Laboratório de Biotecnologia, Centro de Biociências e Biotecnologia (CBB), Universidade Estadual do Norte Fluminense Darcy Ribeiro (UENF), Av. Alberto Lamego, 2000, Campos dos Goytacazes, RJ 28013-602, Brazil; Unidade de Biologia Integrativa, Setor de Genômica e Proteômica, UENF, Brazil
| | - Tatiana Tavares Carrijo
- Universidade Federal do Espírito Santo, Centro de Ciências Exatas, Naturais e da Saúde, Depto. Biologia, Lab. Botânica, Alto Universitário, Guararema, Alegre, ES, Brazil.
| | - Vanildo Silveira
- Laboratório de Biotecnologia, Centro de Biociências e Biotecnologia (CBB), Universidade Estadual do Norte Fluminense Darcy Ribeiro (UENF), Av. Alberto Lamego, 2000, Campos dos Goytacazes, RJ 28013-602, Brazil; Unidade de Biologia Integrativa, Setor de Genômica e Proteômica, UENF, Brazil.
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Sun PW, Chang JT, Luo MX, Liao PC. Genomic insights into local adaptation and vulnerability of Quercus longinux to climate change. BMC PLANT BIOLOGY 2024; 24:279. [PMID: 38609850 PMCID: PMC11015620 DOI: 10.1186/s12870-024-04942-8] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/09/2023] [Accepted: 03/22/2024] [Indexed: 04/14/2024]
Abstract
BACKGROUND Climate change is expected to alter the factors that drive changes in adaptive variation. This is especially true for species with long life spans and limited dispersal capabilities. Rapid climate changes may disrupt the migration of beneficial genetic variations, making it challenging for them to keep up with changing environments. Understanding adaptive genetic variations in tree species is crucial for conservation and effective forest management. Our study used landscape genomic analyses and phenotypic traits from a thorough sampling across the entire range of Quercus longinux, an oak species native to Taiwan, to investigate the signals of adaptation within this species. RESULTS Using ecological data, phenotypic traits, and 1,933 single-nucleotide polymorphisms (SNPs) from 205 individuals, we classified three genetic groups, which were also phenotypically and ecologically divergent. Thirty-five genes related to drought and freeze resistance displayed signatures of natural selection. The adaptive variation was driven by diverse environmental pressures such as low spring precipitation, low annual temperature, and soil grid sizes. Using linear-regression-based methods, we identified isolation by environment (IBE) as the optimal model for adaptive SNPs. Redundancy analysis (RDA) further revealed a substantial joint influence of demography, geology, and environments, suggesting a covariation between environmental gradients and colonization history. Lastly, we utilized adaptive signals to estimate the genetic offset for each individual under diverse climate change scenarios. The required genetic changes and migration distance are larger in severe climates. Our prediction also reveals potential threats to edge populations in northern and southeastern Taiwan due to escalating temperatures and precipitation reallocation. CONCLUSIONS We demonstrate the intricate influence of ecological heterogeneity on genetic and phenotypic adaptation of an oak species. The adaptation is also driven by some rarely studied environmental factors, including wind speed and soil features. Furthermore, the genetic offset analysis predicted that the edge populations of Q. longinux in lower elevations might face higher risks of local extinctions under climate change.
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Affiliation(s)
- Pei-Wei Sun
- School of Life Science, National Taiwan Normal University, No. 88 Ting-Chow Rd., Sec. 4, Taipei, 116, Taiwan
| | - Jui-Tse Chang
- School of Life Science, National Taiwan Normal University, No. 88 Ting-Chow Rd., Sec. 4, Taipei, 116, Taiwan
| | - Min-Xin Luo
- School of Life Science, National Taiwan Normal University, No. 88 Ting-Chow Rd., Sec. 4, Taipei, 116, Taiwan
| | - Pei-Chun Liao
- School of Life Science, National Taiwan Normal University, No. 88 Ting-Chow Rd., Sec. 4, Taipei, 116, Taiwan.
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Zhao S, Gao X, Yu X, Yuan T, Zhang G, Liu C, Li X, Wei P, Li X, Liu X. Comparative Analysis of Chloroplast Genome of Meconopsis (Papaveraceae) Provides Insights into Their Genomic Evolution and Adaptation to High Elevation. Int J Mol Sci 2024; 25:2193. [PMID: 38396871 PMCID: PMC10888623 DOI: 10.3390/ijms25042193] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/01/2023] [Revised: 02/06/2024] [Accepted: 02/07/2024] [Indexed: 02/25/2024] Open
Abstract
The Meconopsis species are widely distributed in the Qinghai-Tibet Plateau, Himalayas, and Hengduan Mountains in China, and have high medicinal and ornamental value. The high diversity of plant morphology in this genus poses significant challenges for species identification, given their propensity for highland dwelling, which makes it a question worth exploring how they cope with the harsh surroundings. In this study, we recently generated chloroplast (cp) genomes of two Meconopsis species, Meconopsis paniculata (M. paniculata) and M. pinnatifolia, and compared them with those of ten Meconopsis cp genomes to comprehend cp genomic features, their phylogenetic relationships, and what part they might play in plateau adaptation. These cp genomes shared a great deal of similarities in terms of genome size, structure, gene content, GC content, and codon usage patterns. The cp genomes were between 151,864 bp and 154,997 bp in length, and contain 133 predictive genes. Through sequence divergence analysis, we identified three highly variable regions (trnD-psbD, ccsA-ndhD, and ycf1 genes), which could be used as potential markers or DNA barcodes for phylogenetic analysis. Between 22 and 38 SSRs and some long repeat sequences were identified from 12 Meconopsis species. Our phylogenetic analysis confirmed that 12 species of Meconopsis clustered into a monophyletic clade in Papaveraceae, which corroborated their intrageneric relationships. The results indicated that M. pinnatifolia and M. paniculata are sister species in the phylogenetic tree. In addition, the atpA and ycf2 genes were positively selected in high-altitude species. The functions of these two genes might be involved in adaptation to the extreme environment in the cold and low CO2 concentration conditions at the plateau.
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Affiliation(s)
- Shuqi Zhao
- State Key Laboratory of Hybrid Rice, College of Life Sciences, Wuhan University, Wuhan 430072, China; (S.Z.); (X.Y.); (G.Z.); (C.L.); (P.W.)
- Key Laboratory of Biodiversity and Environment on the Qinghai-Tibet Plateau of Ministry of Education, College of Life Sciences, Wuhan University, Wuhan 430072, China
| | - Xiaoman Gao
- Laboratory of Extreme Environment Biological Resources and Adaptive Evolution, School of Ecology and Environment, Tibet University, Lhasa 850000, China; (X.G.); (T.Y.); (X.L.)
| | - Xiaolei Yu
- State Key Laboratory of Hybrid Rice, College of Life Sciences, Wuhan University, Wuhan 430072, China; (S.Z.); (X.Y.); (G.Z.); (C.L.); (P.W.)
- Key Laboratory of Biodiversity and Environment on the Qinghai-Tibet Plateau of Ministry of Education, College of Life Sciences, Wuhan University, Wuhan 430072, China
| | - Tao Yuan
- Laboratory of Extreme Environment Biological Resources and Adaptive Evolution, School of Ecology and Environment, Tibet University, Lhasa 850000, China; (X.G.); (T.Y.); (X.L.)
| | - Guiyu Zhang
- State Key Laboratory of Hybrid Rice, College of Life Sciences, Wuhan University, Wuhan 430072, China; (S.Z.); (X.Y.); (G.Z.); (C.L.); (P.W.)
- Key Laboratory of Biodiversity and Environment on the Qinghai-Tibet Plateau of Ministry of Education, College of Life Sciences, Wuhan University, Wuhan 430072, China
| | - Chenlai Liu
- State Key Laboratory of Hybrid Rice, College of Life Sciences, Wuhan University, Wuhan 430072, China; (S.Z.); (X.Y.); (G.Z.); (C.L.); (P.W.)
- Key Laboratory of Biodiversity and Environment on the Qinghai-Tibet Plateau of Ministry of Education, College of Life Sciences, Wuhan University, Wuhan 430072, China
| | - Xinzhong Li
- Laboratory of Extreme Environment Biological Resources and Adaptive Evolution, School of Ecology and Environment, Tibet University, Lhasa 850000, China; (X.G.); (T.Y.); (X.L.)
| | - Pei Wei
- State Key Laboratory of Hybrid Rice, College of Life Sciences, Wuhan University, Wuhan 430072, China; (S.Z.); (X.Y.); (G.Z.); (C.L.); (P.W.)
- Key Laboratory of Biodiversity and Environment on the Qinghai-Tibet Plateau of Ministry of Education, College of Life Sciences, Wuhan University, Wuhan 430072, China
| | - Xiaoyan Li
- Biology Experimental Teaching Center, School of Life Science, Wuhan University, Wuhan 430072, China;
| | - Xing Liu
- State Key Laboratory of Hybrid Rice, College of Life Sciences, Wuhan University, Wuhan 430072, China; (S.Z.); (X.Y.); (G.Z.); (C.L.); (P.W.)
- Key Laboratory of Biodiversity and Environment on the Qinghai-Tibet Plateau of Ministry of Education, College of Life Sciences, Wuhan University, Wuhan 430072, China
- Laboratory of Extreme Environment Biological Resources and Adaptive Evolution, School of Ecology and Environment, Tibet University, Lhasa 850000, China; (X.G.); (T.Y.); (X.L.)
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Chieppa J, Feller IC, Harris K, Dorrance S, Sturchio MA, Gray E, Tjoelker MG, Aspinwall MJ. Thermal acclimation of leaf respiration is consistent in tropical and subtropical populations of two mangrove species. JOURNAL OF EXPERIMENTAL BOTANY 2023; 74:3174-3187. [PMID: 36882067 DOI: 10.1093/jxb/erad093] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/06/2023] [Accepted: 03/06/2023] [Indexed: 05/21/2023]
Abstract
Populations from different climates often show unique growth responses to temperature, reflecting temperature adaptation. Yet, whether populations from different climates differ in physiological temperature acclimation remains unclear. Here, we test whether populations from differing thermal environments exhibit different growth responses to temperature and differences in temperature acclimation of leaf respiration. We grew tropical and subtropical populations of two mangrove species (Avicennia germinans and Rhizophora mangle) under ambient and experimentally warmed conditions in a common garden at the species' northern range limit. We quantified growth and temperature responses of leaf respiration (R) at seven time points over ~10 months. Warming increased productivity of tropical populations more than subtropical populations, reflecting a higher temperature optimum for growth. In both species, R measured at 25 °C declined as seasonal temperatures increased, demonstrating thermal acclimation. Contrary to our expectations, acclimation of R was consistent across populations and temperature treatments. However, populations differed in adjusting the temperature sensitivity of R (Q10) to seasonal temperatures. Following a freeze event, tropical Avicennia showed greater freeze damage than subtropical Avicennia, while both Rhizophora populations appeared equally susceptible. We found evidence of temperature adaptation at the whole-plant scale but little evidence for population differences in thermal acclimation of leaf physiology. Studies that examine potential costs and benefits of thermal acclimation in an evolutionary context may provide new insights into limits of thermal acclimation.
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Affiliation(s)
- Jeff Chieppa
- Department of Biology, University of North Florida, Jacksonville, FL 32224, USA
- College of Forestry and Wildlife Sciences, Auburn University, Auburn, AL 36849, USA
| | - Ilka C Feller
- Smithsonian Environmental Research Center, Edgewater, MD 21037, USA
| | - Kylie Harris
- Department of Biology, University of North Florida, Jacksonville, FL 32224, USA
| | - Susannah Dorrance
- Department of Biology, University of North Florida, Jacksonville, FL 32224, USA
| | - Matthew A Sturchio
- Department of Biology, University of North Florida, Jacksonville, FL 32224, USA
| | - Eve Gray
- Department of Biology, University of North Florida, Jacksonville, FL 32224, USA
| | - Mark G Tjoelker
- Hawkesbury Institute for the Environment, Western Sydney University, Penrith New South Wales, Australia
| | - Michael J Aspinwall
- Department of Biology, University of North Florida, Jacksonville, FL 32224, USA
- College of Forestry and Wildlife Sciences, Auburn University, Auburn, AL 36849, USA
- Formation Environmental LLC, 1631 Alhambra Blvd, Suite 220, Sacramento, CA 95816, USA
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Yu X, Wei P, Zhao S, Chen Z, Li X, Zhang W, Liu C, Yang Y, Li X, Liu X. Population transcriptomics uncover the relative roles of positive selection and differential expression in Batrachium bungei adaptation to the Qinghai-Tibetan plateau. PLANT CELL REPORTS 2023; 42:879-893. [PMID: 36973418 DOI: 10.1007/s00299-023-03005-w] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/17/2023] [Accepted: 03/14/2023] [Indexed: 05/06/2023]
Abstract
KEY MESSAGE Positive selection genes are related to metabolism, while differentially expressed genes are related to photosynthesis, suggesting that genetic adaptation and expression regulation may play independent roles in different gene classes. Genome-wide investigation of the molecular mechanisms for high-altitude adaptation is an intriguing topic in evolutionary biology. The Qinghai-Tibet Plateau (QTP) with its extremely variable environments is an ideal site for studying high-altitude adaptation. Here, we used transcriptome data of 100 individuals from 20 populations collected from various altitudes on the QTP to investigate the adaptive mechanisms of the aquatic plant Batrachium bungei at both the genetic and transcriptional level. To explore genes and biological pathways that may contribute to QTP adaptation, we employed a two-step approach, in which we identified positively selected genes and differentially expressed genes using the landscape genomic and differential expression approaches. The positive selection analysis showed that genes involved in metabolic regulation played a crucial role in B. bungei adaptation to the extreme environments of the QTP, especially intense ultraviolet radiation. Altitude-based differential expression analysis suggested that B. bungei could increase the rate of energy dissipation or reduce the efficiency of light energy absorption by down regulating the expression of photosynthesis-related genes to adapt to the strong ultraviolet radiation. Weighted gene co-expression network analysis identified ribosomal genes as hubs of altitude adaptation in B. bungei. Only a small part of genes (about 10%) overlapped between positively selected genes and differentially expressed genes in B. bungei, suggesting that genetic adaptation and gene expression regulation might play relatively independent roles in different categories of functional genes. Taken together, this study enriches our understanding of the high-altitude adaptation mechanism of B. bungei on the QTP.
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Affiliation(s)
- Xiaolei Yu
- State Key Laboratory of Hybrid Rice, Laboratory of Plant Systematics and Evolutionary Biology, College of Life Sciences, Wuhan University, Wuhan, 430072, Hubei, China
| | - Pei Wei
- State Key Laboratory of Hybrid Rice, Laboratory of Plant Systematics and Evolutionary Biology, College of Life Sciences, Wuhan University, Wuhan, 430072, Hubei, China
| | - Shuqi Zhao
- State Key Laboratory of Hybrid Rice, Laboratory of Plant Systematics and Evolutionary Biology, College of Life Sciences, Wuhan University, Wuhan, 430072, Hubei, China
| | - Zhuyifu Chen
- State Key Laboratory of Hybrid Rice, Laboratory of Plant Systematics and Evolutionary Biology, College of Life Sciences, Wuhan University, Wuhan, 430072, Hubei, China
| | - Xinzhong Li
- Laboratory of Extreme Environmental Biological Resources and Adaptive Evolution, Research Center for Ecology, School of Sciences, Tibet University, Lhasa, 850000, Tibet, China
| | - Wencai Zhang
- Laboratory of Extreme Environmental Biological Resources and Adaptive Evolution, Research Center for Ecology, School of Sciences, Tibet University, Lhasa, 850000, Tibet, China
| | - Chenlai Liu
- State Key Laboratory of Hybrid Rice, Laboratory of Plant Systematics and Evolutionary Biology, College of Life Sciences, Wuhan University, Wuhan, 430072, Hubei, China
| | - Yujiao Yang
- State Key Laboratory of Hybrid Rice, Laboratory of Plant Systematics and Evolutionary Biology, College of Life Sciences, Wuhan University, Wuhan, 430072, Hubei, China
| | - Xiaoyan Li
- Biology Experimental Teaching Center, School of Life Science, Wuhan University, Wuhan, 430072, Hubei, China.
| | - Xing Liu
- State Key Laboratory of Hybrid Rice, Laboratory of Plant Systematics and Evolutionary Biology, College of Life Sciences, Wuhan University, Wuhan, 430072, Hubei, China.
- Laboratory of Extreme Environmental Biological Resources and Adaptive Evolution, Research Center for Ecology, School of Sciences, Tibet University, Lhasa, 850000, Tibet, China.
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Cutts V, Hanz DM, Barajas-Barbosa MP, Schrodt F, Steinbauer MJ, Beierkuhnlein C, Denelle P, Fernández-Palacios JM, Gaüzère P, Grenié M, Irl SDH, Kraft N, Kreft H, Maitner B, Munoz F, Thuiller W, Violle C, Weigelt P, Field R, Algar AC. Links to rare climates do not translate into distinct traits for island endemics. Ecol Lett 2023; 26:504-515. [PMID: 36740842 DOI: 10.1111/ele.14169] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/30/2022] [Revised: 11/08/2022] [Accepted: 12/12/2022] [Indexed: 02/07/2023]
Abstract
Current models of island biogeography treat endemic and non-endemic species as if they were functionally equivalent, focussing primarily on species richness. Thus, the functional composition of island biotas in relation to island biogeographical variables remains largely unknown. Using plant trait data (plant height, leaf area and flower length) for 895 native species in the Canary Islands, we related functional trait distinctiveness and climate rarity for endemic and non-endemic species and island ages. Endemics showed a link to climatically rare conditions that is consistent with island geological change through time. However, functional trait distinctiveness did not differ between endemics and non-endemics and remained constant with island age. Thus, there is no obvious link between trait distinctiveness and occupancy of rare climates, at least for the traits measured here, suggesting that treating endemic and non-endemic species as functionally equivalent in island biogeography is not fundamentally wrong.
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Affiliation(s)
- Vanessa Cutts
- School of Geography, University of Nottingham, Nottingham, UK
- Conservation Science Group, Department of Zoology, University of Cambridge, Cambridge, UK
| | - Dagmar M Hanz
- Biogeography & Biodiversity Lab, Institute of Physical Geography, Goethe University Frankfurt, Frankfurt, Germany
| | - Martha Paola Barajas-Barbosa
- German Centre for Integrative Biodiversity Research (iDiv) Halle-Jena-Leipzig, Leipzig, Germany
- Department of Computer Science, Martin Luther University Halle-Wittenberg, Halle, Germany
| | | | - Manuel J Steinbauer
- Sport Ecology, Bayreuth Center for Sport Science (BaySpo) & Bayreuth Center of Ecology and Environmental Research (BayCEER), Bayreuth, Germany
| | - Carl Beierkuhnlein
- Department of Biogeography, Bayreuth Center of Ecology and Environmental Research (BayCEER), University of Bayreuth, Bayreuth, Germany
| | - Pierre Denelle
- Biodiversity, Macroecology & Biogeography, University of Göttingen, Göttingen, Germany
| | - José María Fernández-Palacios
- Island Ecology and Biogeography Group, Instituto Universitario de Enfermedades Tropicales y Salud Pública de Canarias, Universidad de La Laguna, Spain
| | - Pierre Gaüzère
- Université Grenoble Alpes, Université Savoie Mont Blanc, CNRS, LECA, Grenoble, France
| | - Matthias Grenié
- German Centre for Integrative Biodiversity Research (iDiv) Halle-Jena-Leipzig, Leipzig, Germany
- Leipzig University, Leipzig, Germany
| | - Severin D H Irl
- Biogeography & Biodiversity Lab, Institute of Physical Geography, Goethe University Frankfurt, Frankfurt, Germany
| | - Nathan Kraft
- Department of Ecology and Evolutionary Biology, University of California, Los Angeles, California, USA
| | - Holger Kreft
- Biodiversity, Macroecology & Biogeography, University of Göttingen, Göttingen, Germany
| | - Brian Maitner
- Department of Ecology and Evolutionary Biology, Tucson, Arizona, USA
| | | | - Wilfried Thuiller
- Université Grenoble Alpes, Université Savoie Mont Blanc, CNRS, LECA, Grenoble, France
| | - Cyrille Violle
- CEFE, University of Montpellier, CNRS, EPHE, IRD, Montpellier, France
| | - Patrick Weigelt
- Biodiversity, Macroecology & Biogeography, University of Göttingen, Göttingen, Germany
- Campus-Institut Data Science, Göttingen, Germany
- Centre of Biodiversity and Sustainable Land Use (CBL), University of Göttingen, Göttingen, Germany
| | - Richard Field
- School of Geography, University of Nottingham, Nottingham, UK
| | - Adam C Algar
- School of Geography, University of Nottingham, Nottingham, UK
- Department of Biology, Lakehead University, Thunder Bay, Ontario, Canada
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7
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Wang P, Bai J, Li X, Liu T, Yan Y, Yang Y, Li H. Phylogenetic relationship and comparative analysis of the main Bupleuri Radix species in China. PeerJ 2023; 11:e15157. [PMID: 37077311 PMCID: PMC10108860 DOI: 10.7717/peerj.15157] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/23/2022] [Accepted: 03/10/2023] [Indexed: 04/21/2023] Open
Abstract
Background Bupleuri Radix (Chaihu) is a famous traditional Chinese medicine derived from Bupleurum, Apiaceae. The origin of cultivated Chaihu germplasm in China is unclear, which has led to unstable Chaihu quality. In this study, we reconstructed the phylogeny of the main Chaihu germplasm species in China and identified potential molecular markers to authenticate its origin. Methods Three Bupleurum species (eight individuals), B. bicaule, B. chinense, and B. scorzonerifolium, were selected for genome skimming. Published genomes from B. falcatum and B. marginatum var. stenophyllum were used for comparative analysis. Results Sequences of the complete plastid genomes were conserved with 113 identical genes ranging from 155,540 to 155,866 bp in length. Phylogenetic reconstruction based on complete plastid genomes resolved intrageneric relationships of the five Bupleurum species with high support. Conflicts between the plastid and nuclear phylogenies were observed, which were mainly ascribed to introgressive hybridization. Comparative analysis showed that noncoding regions of the plastomes had most of the variable sequences. Eight regions (atpF-atpH, petN-psbM, rps16-psbK, petA-psbJ, ndhC-trnV/UAC and ycf1) had high divergence values in Bupleurum species and could be promising DNA barcodes for Chaihu authentication. A total of seven polymorphic cpSSRs and 438 polymorphic nSSRs were detected across the five Chaihu germplasms. Three photosynthesis-related genes were under positive selection, of which accD reflected the adaptation fingerprint of B. chinense to different ecological habitats. Our study provides valuable genetic information for phylogenetic investigation, germplasm authentication, and molecular breeding of Chaihu species.
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Affiliation(s)
- Ping Wang
- Xianyang Normal University, Xianyang, China
| | - Jiqing Bai
- Shaanxi University of Chinese Medicine, Xianyang, China
| | - Xue Li
- Xianyang Food and Drug Administration, Xianyang, China
| | | | - Yumeng Yan
- Xianyang Normal University, Xianyang, China
| | | | - Huaizhu Li
- Xianyang Normal University, Xianyang, China
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Remke MJ, Johnson NC, Bowker MA. Sympatric soil biota mitigate a warmer-drier climate for Bouteloua gracilis. GLOBAL CHANGE BIOLOGY 2022; 28:6280-6292. [PMID: 36038989 DOI: 10.1111/gcb.16369] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/17/2022] [Revised: 08/02/2022] [Accepted: 08/03/2022] [Indexed: 06/15/2023]
Abstract
Climate change is altering temperature and precipitation, resulting in widespread plant mortality and shifts in plant distributions. Plants growing in soil types with low water holding capacity may experience intensified effects of reduced water availability as a result of climate change. Furthermore, complex biotic interactions between plants and soil organisms may mitigate or exacerbate the effects of climate change. This 3-year field experiment observed the performance of Bouteloua gracilis ecotypes that were transplanted across an environmental gradient with either sympatric soil from the seed source location or allopatric soil from the location that plants were transplanted into. We also inoculated plants with either sympatric or allopatric soil biotic communities to test: (1) how changes in climate alone influence plant growth, (2) how soil types interact with climate to influence plant growth, and (3) the role of soil biota in mitigating plant migration to novel environments. As expected, plants moved to cooler-wetter sites exhibited enhanced growth; however, plants moved to warmer-drier sites responded variably depending on the provenance of their soil and inoculum. Soil and inoculum provenance had little influence on the performance of plants moved to cooler-wetter sites, but at warmer-drier sites they were important predictors of plant biomass, seed set, and specific leaf area. Specifically, transplants inoculated with their sympatric soil biota and grown in their sympatric soil were as large as or larger than reference plants grown at the seed source locations; however, individuals inoculated with allopatric soil biota were smaller than reference site individuals at warmer, drier sites. These findings demonstrate complicated plant responses to various aspects of environmental novelty where communities of soil organisms may help ameliorate stress. The belowground microbiome of plants should be considered to predict the responses of vegetation more accurately to climate change.
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Affiliation(s)
- Michael J Remke
- Department of Biology, Fort Lewis College, Durango, Colorado, USA
- School of Forestry, Northern Arizona University, Flagstaff, Arizona, USA
| | - Nancy C Johnson
- Department of Biological Sciences, School of Earth and Sustainability, Northern Arizona University, Flagstaff, Arizona, USA
| | - Matthew A Bowker
- School of Forestry, Northern Arizona University, Flagstaff, Arizona, USA
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Maya-Manzano JM, Oteros J, Rojo J, Traidl-Hoffmann C, Schmidt-Weber C, Buters J. Drivers of the release of the allergens Bet v 1 and Phl p 5 from birch and grass pollen. ENVIRONMENTAL RESEARCH 2022; 214:113987. [PMID: 35961547 DOI: 10.1016/j.envres.2022.113987] [Citation(s) in RCA: 7] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/03/2022] [Revised: 07/12/2022] [Accepted: 07/23/2022] [Indexed: 06/15/2023]
Abstract
The drivers affecting the Pollen Allergen Potency (PAP, amount of allergen released per pollen) are sparsely known. Betula and Poaceae airborne pollen are the two main allergenic pollen in the World. Airborne pollen and their allergens Bet v 1 and Phl p 5 were simultaneously measured from 2010 to 2015 in Davos (Switzerland) and Munich (Germany) by using volumetric traps and ChemVol cascade impactors. Daily variations in PAP were analysed in PM>10 and PM2.5-10 air fractions and generalized additive models were created to explain which factors determine PAP, including meteorological parameters and inorganic pollutants. 87.1 ± 13.9% of Bet v 1 and 88.8 ± 15.5% of Phl p 5 was detected in the fraction PM>10 where most pollen grains were collected. Significantly higher PAP for grasses (3.5 ± 1.9 pg Phl p 5/pollen grain) were observed in Munich than in Davos (2.4 ± 1.5 pg/pollen grain, p < 0.001), but not for Betula (2.5 ± 1.6 pg Bet v 1/pollen grain in Munich and 2.3 ± 1.7 in Davos, N.S.). PAP varied between days, years and location, and increased along the pollen season for Poaceae, but remaining constant for Betula. Free allergens (allergens observed in the fraction with limited pollen, PM2.5- 10) were recorded mostly at the beginning or at the end of the pollen season, being linked to higher humidity and rainy days. Also, PAP was higher when the airborne pollen concentrations increased rapidly after one day of low/moderate levels. Our findings show that pollen exposure explains allergen exposure only to a limited extend, and that day in the season, geographic location and some weather conditions need to be considered also to explain symptoms of allergic individuals.
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Affiliation(s)
- José M Maya-Manzano
- Center of Allergy & Environment (ZAUM), Member of the German Center for Lung Research (DZL), Technical University and Helmholtz Center Munich, Munich, Germany
| | - Jose Oteros
- Department of Botany, Ecology and Plant Physiology, Agrifood Campus of International Excellence CeiA3, Andalusian Inter-University Institute for Earth System IISTA, University of Cordoba, Spain.
| | - Jesús Rojo
- Department of Pharmacology, Pharmacognosy and Botany, Complutense University, Madrid, Spain
| | - Claudia Traidl-Hoffmann
- Department of Environmental Medicine, Faculty of Medicine, University of Augsburg, Augsburg, Germany; Institute of Environmental Medicine, Helmholtz Center Munich - German Research Center for Environmental Health, Augsburg, Germany; Christine Kühne Center for Allergy Research and Education, Davos, Switzerland
| | - Carsten Schmidt-Weber
- Center of Allergy & Environment (ZAUM), Member of the German Center for Lung Research (DZL), Technical University and Helmholtz Center Munich, Munich, Germany
| | - Jeroen Buters
- Center of Allergy & Environment (ZAUM), Member of the German Center for Lung Research (DZL), Technical University and Helmholtz Center Munich, Munich, Germany
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10
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Duan X, Jia Z, Li J, Wu S. The influencing factors of leaf functional traits variation of Pinus densiflora Sieb. et Zucc. Glob Ecol Conserv 2022. [DOI: 10.1016/j.gecco.2022.e02177] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022] Open
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11
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Ni B, Zhao W, Zuo X, You J, Li Y, Li J, Du Y, Chen X. Deyeuxia angustifolia Kom. encroachment changes soil physicochemical properties and microbial community in the alpine tundra under climate change. THE SCIENCE OF THE TOTAL ENVIRONMENT 2022; 813:152615. [PMID: 34963583 DOI: 10.1016/j.scitotenv.2021.152615] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/09/2021] [Revised: 12/18/2021] [Accepted: 12/18/2021] [Indexed: 06/14/2023]
Abstract
Plant encroachment in alpine regions, caused by global changes and human activities, has been well documented. However, our knowledge of the effects of plant encroachment on belowground microbial communities is limited. Here, we investigated soil physicochemical properties and microbial community structures under the impact of plant encroachment along an elevation gradient in the alpine tundra of the Changbai Mountain, China. We found that plant encroachment had insignificant (P > 0.05) and inconsistent effects on the α-diversity (number of observed OTUs, Shannon, Chao1, Faith's PD) of soil microbial communities. Plant encroachment indirectly influenced soil microbial community structures by altering soil physicochemical properties, which differed between elevations and plant types (P < 0.05). In all, 40 bacterial indicator taxa and 57 fungal indicator taxa significantly shifted in response to plant encroachment, some of which were involved in soil biogeochemical cycle. Overall, our results documented the impacts of plant encroachment on soil microbial diversity and community composition, and provided a scientific basis for predicting future changes in alpine ecosystem structure and function and its subsequent feedbacks to global change.
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Affiliation(s)
- Biao Ni
- National & Local United Engineering Laboratory for Chinese Herbal Medicine Breeding and Cultivation, Jilin University, Changchun 130012, China; School of Life Sciences, Jilin University, Changchun 130012, China
| | - Wei Zhao
- National & Local United Engineering Laboratory for Chinese Herbal Medicine Breeding and Cultivation, Jilin University, Changchun 130012, China; School of Life Sciences, Jilin University, Changchun 130012, China
| | - Xianghua Zuo
- National & Local United Engineering Laboratory for Chinese Herbal Medicine Breeding and Cultivation, Jilin University, Changchun 130012, China; School of Life Sciences, Jilin University, Changchun 130012, China
| | - Jian You
- National & Local United Engineering Laboratory for Chinese Herbal Medicine Breeding and Cultivation, Jilin University, Changchun 130012, China; School of Life Sciences, Jilin University, Changchun 130012, China
| | - Yulong Li
- National & Local United Engineering Laboratory for Chinese Herbal Medicine Breeding and Cultivation, Jilin University, Changchun 130012, China; School of Life Sciences, Jilin University, Changchun 130012, China
| | - Jiangnan Li
- National & Local United Engineering Laboratory for Chinese Herbal Medicine Breeding and Cultivation, Jilin University, Changchun 130012, China; School of Life Sciences, Jilin University, Changchun 130012, China
| | - Yingda Du
- School of Life Sciences, Jilin University, Changchun 130012, China
| | - Xia Chen
- National & Local United Engineering Laboratory for Chinese Herbal Medicine Breeding and Cultivation, Jilin University, Changchun 130012, China; School of Life Sciences, Jilin University, Changchun 130012, China.
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12
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Jeong H, Cho YC, Kim E. Differential plastic responses to temperature and nitrogen deposition in the subalpine plant species, Primula farinosa subsp . modesta. AOB PLANTS 2021; 13:plab061. [PMID: 34646436 PMCID: PMC8501906 DOI: 10.1093/aobpla/plab061] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 03/07/2021] [Accepted: 09/15/2021] [Indexed: 06/13/2023]
Abstract
Future environmental changes are projected to threaten plant populations near mountaintops, but plastic responses of plant traits that are related to demographic parameters may reduce the detrimental effects of altered environments. Despite its ecological significance, little is known about the intraspecific variation of plasticity in alpine plant species such as Primula farinosa subsp. modesta. In this study, we investigated the plastic responses of plants at the early developmental stage from four P. farinosa natural populations in response to temperature and nitrogen deposition under laboratory conditions. Measured traits included plant survival, leaf number, rosette diameter, carbon assimilation rate and leaf chlorophyll content. In addition, we conducted a demographic survey of the natural populations to assess the plant's performance at the early developmental stage in the field and evaluate the ecological implications of our experimental treatments. The seedling stage contributed to the projected population growth rate in natural conditions, and the growth and survival of seedlings in the field were comparable to those grown in the control treatment. In response to high temperature, plants exhibited lower survival but produced larger rosettes with more leaves. Nitrogen deposition had little effect on plant survival and plant size; however, it increased plant survival in one population and altered the effect of temperature on the carbon assimilation rate. Populations exhibited differential plasticity indexes of measured traits in response to environmental treatments. These results suggest that even though the plants suffer from high early mortality under increasing temperature, stimulated growth at a high temperature potentially contributes to the persistence of P. farinosa natural populations. Natural populations might face differential extinction risks due to distinctive plastic responses to altered environments.
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Affiliation(s)
- Hyungsoon Jeong
- School of Earth Sciences and Environmental Engineering, Gwangju Institute of Science and Technology, Gwangju 61005, Korea
| | - Yong-Chan Cho
- Conservation Center for Gwangneung Forest, Korea National Arboretum, Pocheon 11186, Korea
| | - Eunsuk Kim
- School of Earth Sciences and Environmental Engineering, Gwangju Institute of Science and Technology, Gwangju 61005, Korea
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13
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Zhao W, Wang X, Li L, Li J, Yin H, Zhao Y, Chen X. Evaluation of environmental factors affecting the genetic diversity, genetic structure, and the potential distribution of Rhododendron aureum Georgi under changing climate. Ecol Evol 2021; 11:12294-12306. [PMID: 34594500 PMCID: PMC8462154 DOI: 10.1002/ece3.7803] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/05/2020] [Revised: 04/19/2021] [Accepted: 05/27/2021] [Indexed: 11/29/2022] Open
Abstract
Understanding genetic variation and structure, adaptive genetic variation, and its relationship with environmental factors is of great significance to understand how plants adapt to climate change and design effective conservation and management strategies. The objective of this study was to (I) investigate the genetic diversity and structure by AFLP markers in 36 populations of R. aureum from northeast China, (Ⅱ) reveal the relative contribution of geographical and environmental impacts on the distribution and genetic differentiation of R. aureum, (Ⅲ) identify outlier loci under selection and evaluate the association between outlier loci and environmental factors, and (Ⅳ) exactly calculate the development trend of population of R. aureum, as it is confronted with severe climate change and to provide information for designing effective conservation and management strategies. We found high genetic variation (I = 0.584) and differentiation among populations (ΦST = 0.703) and moderate levels of genetic diversity within populations of R. aureum. A significant relationship between genetic distance and environmental distance was identified, which suggested that the differentiation of different populations was caused by environmental factors. Using BayeScan and Dfdist, 42 outlier loci are identified and most of the outlier loci are associated with climate or relief factors, suggesting that these loci are linked to genes that are involved in the adaptability of R. aureum to the environment. Species distribution models (SDMs) showed that climate warming will cause a significant reduction in suitable areas for R. aureum, especially under the RCP 85 scenario. Our results help to understand the potential response of R. aureum to climatic changes and provide new perspectives for R. aureum resource management and conservation strategies.
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Affiliation(s)
- Wei Zhao
- National & Local United Engineering Laboratory for Chinese Herbal Medicine Breeding and CultivationJilin UniversityChangchunChina
- School of Life ScienceJilin UniversityChangchunChina
| | - Xiaolong Wang
- Medical Technology DepartmentQiqihar Medical UniversityQiqiharChina
| | - Lin Li
- Medical Technology DepartmentQiqihar Medical UniversityQiqiharChina
| | - Jiangnan Li
- National & Local United Engineering Laboratory for Chinese Herbal Medicine Breeding and CultivationJilin UniversityChangchunChina
- School of Life ScienceJilin UniversityChangchunChina
| | - Hang Yin
- Jilin Provincial Joint Key Laboratory of Changbai Mountain Biocoenosis and BiodiversityAntuChina
- Academy of Sciences of Changbai MountainChangbaishanChina
| | - Ying Zhao
- Jilin Provincial Joint Key Laboratory of Changbai Mountain Biocoenosis and BiodiversityAntuChina
- Academy of Sciences of Changbai MountainChangbaishanChina
| | - Xia Chen
- National & Local United Engineering Laboratory for Chinese Herbal Medicine Breeding and CultivationJilin UniversityChangchunChina
- School of Life ScienceJilin UniversityChangchunChina
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14
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Wötzel S, Andrello M, Albani MC, Koch MA, Coupland G, Gugerli F. Arabis alpina: A perennial model plant for ecological genomics and life-history evolution. Mol Ecol Resour 2021; 22:468-486. [PMID: 34415668 PMCID: PMC9293087 DOI: 10.1111/1755-0998.13490] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/05/2021] [Revised: 07/28/2021] [Accepted: 08/16/2021] [Indexed: 01/03/2023]
Abstract
Many model organisms were chosen and achieved prominence because of an advantageous combination of their life‐history characteristics, genetic properties and also practical considerations. Discoveries made in Arabidopsis thaliana, the most renowned noncrop plant model species, have markedly stimulated studies in other species with different biology. Within the family Brassicaceae, the arctic–alpine Arabis alpina has become a model complementary to Arabidopsis thaliana to study the evolution of life‐history traits, such as perenniality, and ecological genomics in harsh environments. In this review, we provide an overview of the properties that facilitated the rapid emergence of A. alpina as a plant model. We summarize the evolutionary history of A. alpina, including genomic aspects, the diversification of its mating system and demographic properties, and we discuss recent progress in the molecular dissection of developmental traits that are related to its perennial life history and environmental adaptation. From this published knowledge, we derive open questions that might inspire future research in A. alpina, other Brassicaceae species or more distantly related plant families.
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Affiliation(s)
- Stefan Wötzel
- Institute of Ecology, Evolution and Diversity, Goethe University Frankfurt and Senckenberg Biodiversity and Climate Research Centre, Frankfurt (Main), Germany
| | - Marco Andrello
- Institute for the Study of Anthropic Impacts and Sustainability in the Marine Environment, National Research Council, CNR-IAS, Rome, Italy
| | - Maria C Albani
- Institute for Plant Sciences, University of Cologne, Cologne, Germany
| | - Marcus A Koch
- Biodiversity and Plant Systematics, Centre for Organismal Studies (COS), Heidelberg University, Heidelberg, Germany
| | - George Coupland
- Department of Plant Development Biology, MPI for Plant Breeding Research, Cologne, Germany
| | - Felix Gugerli
- WSL Swiss Federal Research Institute, Birmensdorf, Switzerland
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15
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Das A, Prakash A, Dedon N, Doty A, Siddiqui M, Preston JC. Variation in climatic tolerance, but not stomatal traits, partially explains Pooideae grass species distributions. ANNALS OF BOTANY 2021; 128:83-95. [PMID: 33772589 PMCID: PMC8318108 DOI: 10.1093/aob/mcab046] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/03/2021] [Accepted: 03/24/2021] [Indexed: 06/12/2023]
Abstract
BACKGROUND AND AIMS Grasses in subfamily Pooideae live in some of the world's harshest terrestrial environments, from frigid boreal zones to the arid windswept steppe. It is hypothesized that the climate distribution of species within this group is driven by differences in climatic tolerance, and that tolerance can be partially explained by variation in stomatal traits. METHODS We determined the aridity index (AI) and minimum temperature of the coldest month (MTCM) for 22 diverse Pooideae accessions and one outgroup, and used comparative methods to assess predicted relationships for climate traits versus fitness traits, stomatal diffusive conductance to water (gw) and speed of stomatal closure following drought and/or cold. KEY RESULTS Results demonstrate that AI and MTCM predict variation in survival/regreening following drought/cold, and gw under drought/cold is positively correlated with δ 13C-measured water use efficiency (WUE). However, the relationship between climate traits and fitness under drought/cold was not explained by gw or speed of stomatal closure. CONCLUSIONS These findings suggest that Pooideae distributions are at least partly determined by tolerance to aridity and above-freezing cold, but that variation in tolerance is not uniformly explained by variation in stomatal traits.
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Affiliation(s)
- Aayudh Das
- The University of Vermont, Department of Plant Biology, Burlington, VT 05405, USA
| | - Anoob Prakash
- The University of Vermont, Department of Plant Biology, Burlington, VT 05405, USA
| | - Natalie Dedon
- The University of Vermont, Department of Plant Biology, Burlington, VT 05405, USA
| | - Alex Doty
- The University of Vermont, Department of Plant Biology, Burlington, VT 05405, USA
| | - Muniba Siddiqui
- The University of Vermont, Department of Plant Biology, Burlington, VT 05405, USA
| | - Jill C Preston
- The University of Vermont, Department of Plant Biology, Burlington, VT 05405, USA
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16
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Ishizuka W, Kon H, Kita K, Kuromaru M, Goto S. Local adaptation to contrasting climatic conditions in Sakhalin fir (
Abies sachalinensis
) revealed by long‐term provenance trials. Ecol Res 2021. [DOI: 10.1111/1440-1703.12232] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Wataru Ishizuka
- Forestry Research Institute, Hokkaido Research Organization Bibai Japan
| | - Hirokazu Kon
- Forestry Research Institute, Hokkaido Research Organization Bibai Japan
| | - Kazuhito Kita
- Forestry Research Institute, Hokkaido Research Organization Bibai Japan
| | - Makoto Kuromaru
- Forestry Research Institute, Hokkaido Research Organization Bibai Japan
| | - Susumu Goto
- Education and Research Center, Graduate School of Agricultural and Life Sciences, The University of Tokyo Tokyo Japan
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17
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Keivani M, Mehregan I, Albach DC. Evaluating morphological diversity among Plantago major L. populations and influence of ecological variables. Biologia (Bratisl) 2021. [DOI: 10.1007/s11756-021-00711-2] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/22/2022]
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18
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Andriamihaja CF, Ramarosandratana AV, Grisoni M, Jeannoda VH, Besse P. Drivers of population divergence and species differentiation in a recent group of indigenous orchids ( Vanilla spp.) in Madagascar. Ecol Evol 2021; 11:2681-2700. [PMID: 33767829 PMCID: PMC7981232 DOI: 10.1002/ece3.7224] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/21/2020] [Revised: 12/16/2020] [Accepted: 12/22/2020] [Indexed: 11/21/2022] Open
Abstract
With over 25,000 species, orchids are among families with remarkable high rate of diversification. Since Darwin's time, major advances attributed the exceptional diversity of orchids to plant-pollinator interactions. However, unraveling the processes and factors that determine the phenotypic and genotypic variation of natural orchid populations remains a challenge. Here, we assessed genetic population structure and floral differentiation in recently diverged leafless Vanilla species in a world biodiversity hotspot, Madagascar, using seven microsatellite loci and 26 morphometric variables. Additionally, analyses were performed to test for the occurrence of any patterns of isolation by distance, isolation by environment, and isolation by adaptation and to detect possible physical barriers that might have caused genetic discontinuities between populations. Positive inbreeding coefficients detected in 22 populations were probably due to the presence of null alleles, geitonogamy and/or some admixture (sympatric species). In contrast, the only high-altitude population showed an important rate of clonality leading to heterozygote excess. Genetic diversity was maximum in western populations, suggesting a postglacial colonization to the north and south. Clustering analyses identified seven genetic groups characterized by specific floral traits that matched five botanical descriptions in the literature. A contribution of montane refugia and river barriers on population differentiation was detected. We also detected combined effects of IBD/IBE and IBE/IBA on genetic differentiation and suggested this pattern is more likely determined by ecological isolation, although pollinator-mediated divergent selection could not be ruled out for some of the species. Overall, this study provides further insights on speciation in orchids, a group for which Madagascar shows one of the world's highest level of endemism and confirms the importance of the peculiar biogeography of the island in shaping species differentiation.
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Affiliation(s)
- Cathucia F. Andriamihaja
- Université de la RéunionUMR PVBMTSt PierreFrance
- Department of Plant Biology and EcologyUniversity of AntananarivoAntananarivoMadagascar
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19
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Genetic diversity of native and cultivated Ugandan Robusta coffee (Coffea canephora Pierre ex A. Froehner): Climate influences, breeding potential and diversity conservation. PLoS One 2021; 16:e0245965. [PMID: 33556074 PMCID: PMC7870046 DOI: 10.1371/journal.pone.0245965] [Citation(s) in RCA: 9] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/01/2020] [Accepted: 01/12/2021] [Indexed: 11/22/2022] Open
Abstract
Wild genetic resources and their ability to adapt to environmental change are critically important in light of the projected climate change, while constituting the foundation of agricultural sustainability. To address the expected negative effects of climate change on Robusta coffee trees (Coffea canephora), collecting missions were conducted to explore its current native distribution in Uganda over a broad climatic range. Wild material from seven forests could thus be collected. We used 19 microsatellite (SSR) markers to assess genetic diversity and structure of this material as well as material from two ex-situ collections and a feral population. The Ugandan C. canephora diversity was then positioned relative to the species’ global diversity structure. Twenty-two climatic variables were used to explore variations in climatic zones across the sampled forests. Overall, Uganda’s native C. canephora diversity differs from other known genetic groups of this species. In northwestern (NW) Uganda, four distinct genetic clusters were distinguished being from Zoka, Budongo, Itwara and Kibale forests A large southern-central (SC) cluster included Malabigambo, Mabira, and Kalangala forest accessions, as well as feral and cultivated accessions, suggesting similarity in genetic origin and strong gene flow between wild and cultivated compartments. We also confirmed the introduction of Congolese varieties into the SC region where most Robusta coffee production takes place. Identified populations occurred in divergent environmental conditions and 12 environmental variables significantly explained 16.3% of the total allelic variation across populations. The substantial genetic variation within and between Ugandan populations with different climatic envelopes might contain adaptive diversity to cope with climate change. The accessions that we collected have substantially enriched the diversity hosted in the Ugandan collections and thus contribute to ex situ conservation of this vital genetic resource. However, there is an urgent need to develop strategies to enhance complementary in-situ conservation of Coffea canephora in native forests in northwestern Uganda.
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20
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Wieters B, Steige KA, He F, Koch EM, Ramos-Onsins SE, Gu H, Guo YL, Sunyaev S, de Meaux J. Polygenic adaptation of rosette growth in Arabidopsis thaliana. PLoS Genet 2021; 17:e1008748. [PMID: 33493157 PMCID: PMC7861555 DOI: 10.1371/journal.pgen.1008748] [Citation(s) in RCA: 10] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/27/2020] [Revised: 02/04/2021] [Accepted: 12/10/2020] [Indexed: 12/16/2022] Open
Abstract
The rate at which plants grow is a major functional trait in plant ecology. However, little is known about its evolution in natural populations. Here, we investigate evolutionary and environmental factors shaping variation in the growth rate of Arabidopsis thaliana. We used plant diameter as a proxy to monitor plant growth over time in environments that mimicked latitudinal differences in the intensity of natural light radiation, across a set of 278 genotypes sampled within four broad regions, including an outgroup set of genotypes from China. A field experiment conducted under natural conditions confirmed the ecological relevance of the observed variation. All genotypes markedly expanded their rosette diameter when the light supply was decreased, demonstrating that environmental plasticity is a predominant source of variation to adapt plant size to prevailing light conditions. Yet, we detected significant levels of genetic variation both in growth rate and growth plasticity. Genome-wide association studies revealed that only 2 single nucleotide polymorphisms associate with genetic variation for growth above Bonferroni confidence levels. However, marginally associated variants were significantly enriched among genes with an annotated role in growth and stress reactions. Polygenic scores computed from marginally associated variants confirmed the polygenic basis of growth variation. For both light regimes, phenotypic divergence between the most distantly related population (China) and the various regions in Europe is smaller than the variation observed within Europe, indicating that the evolution of growth rate is likely to be constrained by stabilizing selection. We observed that Spanish genotypes, however, reach a significantly larger size than Northern European genotypes. Tests of adaptive divergence and analysis of the individual burden of deleterious mutations reveal that adaptive processes have played a more important role in shaping regional differences in rosette growth than maladaptive evolution. The rate at which plants grow is a major functional trait in plant ecology. However, little is known about its genetic variation in natural populations. Here, we investigate genetic and environmental factors shaping variation in the growth rate of Arabidopsis thaliana and ask whether genetic variation in plant growth contributes to adaptation to local environmental conditions. We grew plants under two light regimes that mimic latitudinal differences in the intensity of natural light radiation, and measured plant diameter as it grew over time. When the light supply was decreased, plant diameter grew more slowly but reached a markedly larger final size, confirming that plants can adjust their growth to prevailing light conditions. Yet, we also detected significant levels of genetic variation both in growth rate and in how the growth dynamics is adjusted to the light conditions. We show that this variation is encoded by many loci of small effect that are hard to locate in the genome but overall significantly enriched among genes associated with growth and stress reactions. We further observe that Spanish genotypes tended to reach, on average, a significantly larger rosette size than Northern European genotypes. Tests of adaptive divergence indicate that these differences may reflect adaptation to local environmental conditions.
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Affiliation(s)
| | - Kim A. Steige
- Institute of Botany, University of Cologne, Cologne, Germany
| | - Fei He
- Institute of Botany, University of Cologne, Cologne, Germany
| | - Evan M. Koch
- Genetics Division, Brigham & Women's Hospital and Harvard Medical School, Boston MA, United States of America
- Department of Biomedical Informatics, Harvard Medical School, Boston MA, United States of America
| | | | - Hongya Gu
- State Key Laboratory for Protein and Plant Gene Research, College of Life Sciences, Peking University, Beijing, China
| | - Ya-Long Guo
- State Key Laboratory of Systematic and Evolutionary Botany, Institute of Botany, Chinese Academy of Sciences, Beijing, China
| | - Shamil Sunyaev
- Genetics Division, Brigham & Women's Hospital and Harvard Medical School, Boston MA, United States of America
- Department of Biomedical Informatics, Harvard Medical School, Boston MA, United States of America
| | - Juliette de Meaux
- Institute of Botany, University of Cologne, Cologne, Germany
- * E-mail:
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21
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Verrall B, Pickering CM. Alpine vegetation in the context of climate change: A global review of past research and future directions. THE SCIENCE OF THE TOTAL ENVIRONMENT 2020; 748:141344. [PMID: 32814293 DOI: 10.1016/j.scitotenv.2020.141344] [Citation(s) in RCA: 33] [Impact Index Per Article: 8.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/03/2020] [Revised: 07/26/2020] [Accepted: 07/27/2020] [Indexed: 06/11/2023]
Abstract
Climate change is causing extensive alterations to ecosystems globally, with some more vulnerable than others. Alpine ecosystems, characterised by low-temperatures and cryophilic vegetation, provide ecosystems services for billions of people but are considered among the most susceptible to climate change. Therefore, it is timely to review research on climate change on alpine vegetation including assessing trends, topics, themes and gaps. Using a multicomponent bibliometric approach, we extracted bibliometric metadata from 3143 publications identified by searching titles, keywords and abstracts for research on 'climate change' and 'alpine vegetation' from Scopus and Web of Science. While primarily focusing on 'alpine vegetation', some literature that also assessed vegetation below the treeline was captured. There has been an exponential increase in research over 50 years, greater engagement and diversification in who does research, and where it is published and conducted, with increasing focus beyond Europe, particularly in China. Content analysis of titles, keywords and abstracts revealed that most of the research has focused on alpine grasslands but there have been relatively few publications that examine specialist vegetation communities such as snowbeds, subnival vegetation and fellfields. Important themes emerged from analysis of keywords, including treelines and vegetation dynamics, biodiversity, the Tibetan Plateau as well as grasslands and meadows. Traditional ecological monitoring techniques were important early on, but remote sensing has become the primary method for assessment. A key book on alpine plants, the IPCC reports and a few papers in leading journals underpin much of the research. Overall, research on this topic is increasing, with new methods and directions but thematic and geographical gaps remain particularly for research on extreme climatic events, and research in South America, in part due to limited capacity for research on these rare but valuable ecosystems.
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Affiliation(s)
- Brodie Verrall
- Environment Futures Research Institute and School of Environment and Sciences, Griffith University, Queensland, Australia.
| | - Catherine Marina Pickering
- Environment Futures Research Institute and School of Environment and Sciences, Griffith University, Queensland, Australia
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Chien WM, Chang CT, Chiang YC, Hwang SY. Ecological Factors Generally Not Altitude Related Played Main Roles in Driving Potential Adaptive Evolution at Elevational Range Margin Populations of Taiwan Incense Cedar ( Calocedrus formosana). Front Genet 2020; 11:580630. [PMID: 33262787 PMCID: PMC7686793 DOI: 10.3389/fgene.2020.580630] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/06/2020] [Accepted: 10/21/2020] [Indexed: 12/05/2022] Open
Abstract
Population diversification can be shaped by a combination of environmental factors as well as geographic isolation interacting with gene flow. We surveyed genetic variation of 243 samples from 12 populations of Calocedrus formosana using amplified fragment length polymorphism (AFLP) and scored a total of 437 AFLP fragments using 11 selective amplification primer pairs. The AFLP variation was used to assess the role of gene flow on the pattern of genetic diversity and to test environments in driving population adaptive evolution. This study found the relatively lower level of genetic diversity and the higher level of population differentiation in C. formosana compared with those estimated in previous studies of conifers including Cunninghamia konishii, Keteleeria davidiana var. formosana, and Taiwania cryptomerioides occurring in Taiwan. BAYESCAN detected 26 FST outlier loci that were found to be associated strongly with various environmental variables using multiple univariate logistic regression, latent factor mixed model, and Bayesian logistic regression. We found several environmentally dependent adaptive loci with high frequencies in low- or high-elevation populations, suggesting their involvement in local adaptation. Ecological factors, including relative humidity and sunshine hours, that are generally not altitude related could have been the most important selective drivers for population divergent evolution in C. formosana. The present study provides fundamental information in relation to adaptive evolution and can be useful for assisted migration program of C. formosana in the future conservation of this species.
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Affiliation(s)
- Wei-Ming Chien
- School of Life Science, National Taiwan Normal University, Taipei, Taiwan
| | - Chung-Te Chang
- Department of Life Science, Tunghai University, Taichung, Taiwan
| | - Yu-Chung Chiang
- Department of Biological Sciences, National Sun Yat-sen University, Kaohsiung, Taiwan
| | - Shih-Ying Hwang
- School of Life Science, National Taiwan Normal University, Taipei, Taiwan
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23
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Bachmann JC, Van Buskirk J. Adaptation to elevation but limited local adaptation in an amphibian. Evolution 2020; 75:956-969. [PMID: 33063864 DOI: 10.1111/evo.14109] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/06/2020] [Revised: 09/24/2020] [Accepted: 10/04/2020] [Indexed: 01/10/2023]
Abstract
We performed a reciprocal transplant experiment to estimate "parallel" adaptation to elevation and "unique" adaptation to local sites at the same elevation, using the frog Rana temporaria in the Swiss Alps. It is important to distinguish these two processes because they have different implications for population structure and ecological specialization. Larvae were reared from hatching to metamorphosis within enclosures installed in their pond of origin, in three foreign ponds at the same elevation, and in four ponds at different elevation (1500-2000 m higher or lower). There were two source populations from each elevation, and adults were held in a common environment for 1 year before they were crossed to produce offspring for the experiment. Fitness was a measure that integrated larval survival, development rate, and body size. Parallel adaptation to elevation was indicated by an advantage at the home elevation (11.5% fitness difference at low elevation and 47% at high elevation). This effect was stronger than that observed in most other studies, according to a survey of previous transplant experiments across elevation (N = 8 animal species and 71 plants). Unique local adaptation within elevational zones was only 0.3-0.7 times as strong as parallel adaptation, probably because gene flow is comparatively high among nearby wetlands at the same elevation. The home-elevation advantage may reduce gene flow across the elevational gradient and enable the evolution of habitat races specialized on elevation.
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Affiliation(s)
- Judith C Bachmann
- Department of Evolutionary Biology and Environmental Studies, University of Zurich, Zurich, Switzerland
| | - Josh Van Buskirk
- Department of Evolutionary Biology and Environmental Studies, University of Zurich, Zurich, Switzerland
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24
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An integrative Study Showing the Adaptation to Sub-Optimal Growth Conditions of Natural Populations of Arabidopsis thaliana: A Focus on Cell Wall Changes. Cells 2020; 9:cells9102249. [PMID: 33036444 PMCID: PMC7601860 DOI: 10.3390/cells9102249] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/02/2020] [Revised: 09/28/2020] [Accepted: 10/03/2020] [Indexed: 12/12/2022] Open
Abstract
In the global warming context, plant adaptation occurs, but the underlying molecular mechanisms are poorly described. Studying natural variation of the model plant Arabidopsisthaliana adapted to various environments along an altitudinal gradient should contribute to the identification of new traits related to adaptation to contrasted growth conditions. The study was focused on the cell wall (CW) which plays major roles in the response to environmental changes. Rosettes and floral stems of four newly-described populations collected at different altitudinal levels in the Pyrenees Mountains were studied in laboratory conditions at two growth temperatures (22 vs. 15 °C) and compared to the well-described Col ecotype. Multi-omic analyses combining phenomics, metabolomics, CW proteomics, and transcriptomics were carried out to perform an integrative study to understand the mechanisms of plant adaptation to contrasted growth temperature. Different developmental responses of rosettes and floral stems were observed, especially at the CW level. In addition, specific population responses are shown in relation with their environment and their genetics. Candidate genes or proteins playing roles in the CW dynamics were identified and will deserve functional validation. Using a powerful framework of data integration has led to conclusions that could not have been reached using standard statistical approaches.
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Galliart M, Sabates S, Tetreault H, DeLaCruz A, Bryant J, Alsdurf J, Knapp M, Bello NM, Baer SG, Maricle BR, Gibson DJ, Poland J, St Amand P, Unruh N, Parrish O, Johnson L. Adaptive genetic potential and plasticity of trait variation in the foundation prairie grass Andropogon gerardii across the US Great Plains' climate gradient: Implications for climate change and restoration. Evol Appl 2020; 13:2333-2356. [PMID: 33005227 PMCID: PMC7513703 DOI: 10.1111/eva.13028] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/08/2019] [Revised: 03/06/2020] [Accepted: 04/06/2020] [Indexed: 12/04/2022] Open
Abstract
Plant response to climate depends on a species' adaptive potential. To address this, we used reciprocal gardens to detect genetic and environmental plasticity effects on phenotypic variation and combined with genetic analyses. Four reciprocal garden sites were planted with three regional ecotypes of Andropogon gerardii, a dominant Great Plains prairie grass, using dry, mesic, and wet ecotypes originating from western KS to Illinois that span 500-1,200 mm rainfall/year. We aimed to answer: (a) What is the relative role of genetic constraints and phenotypic plasticity in controlling phenotypes? (b) When planted in the homesite, is there a trait syndrome for each ecotype? (c) How are genotypes and phenotypes structured by climate? and (d) What are implications of these results for response to climate change and use of ecotypes for restoration? Surprisingly, we did not detect consistent local adaptation. Rather, we detected co-gradient variation primarily for most vegetative responses. All ecotypes were stunted in western KS. Eastward, the wet ecotype was increasingly robust relative to other ecotypes. In contrast, fitness showed evidence for local adaptation in wet and dry ecotypes with wet and mesic ecotypes producing little seed in western KS. Earlier flowering time in the dry ecotype suggests adaptation to end of season drought. Considering ecotype traits in homesite, the dry ecotype was characterized by reduced canopy area and diameter, short plants, and low vegetative biomass and putatively adapted to water limitation. The wet ecotype was robust, tall with high biomass, and wide leaves putatively adapted for the highly competitive, light-limited Eastern Great Plains. Ecotype differentiation was supported by random forest classification and PCA. We detected genetic differentiation and outlier genes associated with primarily precipitation. We identified candidate gene GA1 for which allele frequency associated with plant height. Sourcing of climate adapted ecotypes should be considered for restoration.
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Affiliation(s)
| | | | | | | | | | | | - Mary Knapp
- State ClimatologistKansas State UniversityManhattanKSUSA
| | | | - Sara G. Baer
- Ecology and Evolutionary BiologyUniversity of KansasLawrenceKSUSA
| | - Brian R. Maricle
- Department of Biological SciencesFort Hays State UniversityHaysKSUSA
| | - David J. Gibson
- Plant Biology and Center for EcologySouthern Illinois UniversityCarbondaleILUSA
| | - Jesse Poland
- Plant PathologyKansas State UniversityManhattanKSUSA
| | - Paul St Amand
- Hard Winter Wheat Genetics Research UnitUSDA‐ARSManhattanKSUSA
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26
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Fan X, Yan X, Qian C, Bachir DG, Yin X, Sun P, Ma XF. Leaf size variations in a dominant desert shrub, Reaumuria soongarica, adapted to heterogeneous environments. Ecol Evol 2020; 10:10076-10094. [PMID: 33005365 PMCID: PMC7520190 DOI: 10.1002/ece3.6668] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/24/2020] [Revised: 07/16/2020] [Accepted: 07/20/2020] [Indexed: 11/07/2022] Open
Abstract
The climate in arid Central Asia (ACA) has changed rapidly in recent decades, but the ecological consequences of this are far from clear. To predict the impacts of climate change on ecosystem functioning, greater attention should be given to the relationships between leaf functional traits and environmental heterogeneity. As a dominant constructive shrub widely distributed in ACA, Reaumuria soongarica provided us with an ideal model to understand how leaf functional traits of desert ecosystems responded to the heterogeneous environments of ACA. Here, to determine the influences of genetic and ecological factors, we characterized species-wide variations in leaf traits among 30 wild populations of R. soongarica and 16 populations grown in a common garden. We found that the leaf length, width, and leaf length to width ratio (L/W) of the northern lineage were significantly larger than those of other genetic lineages, and principal component analysis based on the in situ environmental factors distinguished the northern lineage from the other lineages studied. With increasing latitude, leaf length, width, and L/W in the wild populations increased significantly. Leaf length and L/W were negatively correlated with altitude, and first increased and then decreased with increasing mean annual temperature (MAT) and mean annual precipitation (MAP). Stepwise regression analyses further indicated that leaf length variation was mainly affected by latitude. However, leaf width was uncorrelated with altitude, MAT, or MAP. The common garden trial showed that leaf width variation among the eastern populations was caused by both local adaptation and phenotypic plasticity. Our findings suggest that R. soongarica preferentially changes leaf length to adjust leaf size to cope with environmental change. We also reveal phenotypic evidence for ecological speciation of R. soongarica. These results will help us better understand and predict the consequences of climate change for desert ecosystem functioning.
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Affiliation(s)
- Xingke Fan
- Key Laboratory of Stress Physiology and Ecology in Cold and Arid Regions, Gansu Province Department of Ecology and Agriculture Research Northwest Institute of Eco-Environment and Resources Chinese Academy of Sciences Lanzhou China
- University of Chinese Academy of Sciences Beijing China
| | - Xia Yan
- School of Life Sciences Nantong University Nantong China
| | - Chaoju Qian
- Key Laboratory of Stress Physiology and Ecology in Cold and Arid Regions, Gansu Province Department of Ecology and Agriculture Research Northwest Institute of Eco-Environment and Resources Chinese Academy of Sciences Lanzhou China
| | - Daoura Goudia Bachir
- Key Laboratory of Stress Physiology and Ecology in Cold and Arid Regions, Gansu Province Department of Ecology and Agriculture Research Northwest Institute of Eco-Environment and Resources Chinese Academy of Sciences Lanzhou China
| | - Xiaoyue Yin
- Key Laboratory of Stress Physiology and Ecology in Cold and Arid Regions, Gansu Province Department of Ecology and Agriculture Research Northwest Institute of Eco-Environment and Resources Chinese Academy of Sciences Lanzhou China
- University of Chinese Academy of Sciences Beijing China
| | - Peipei Sun
- Key Laboratory of Stress Physiology and Ecology in Cold and Arid Regions, Gansu Province Department of Ecology and Agriculture Research Northwest Institute of Eco-Environment and Resources Chinese Academy of Sciences Lanzhou China
- University of Chinese Academy of Sciences Beijing China
| | - Xiao-Fei Ma
- Key Laboratory of Stress Physiology and Ecology in Cold and Arid Regions, Gansu Province Department of Ecology and Agriculture Research Northwest Institute of Eco-Environment and Resources Chinese Academy of Sciences Lanzhou China
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Yang Y, Zhou Z, Li Y, Lv Y, Yang D, Yang S, Wu J, Li X, Gu Z, Sun X, Yang Y. Uncovering the role of a positive selection site of wax ester synthase/diacylglycerol acyltransferase in two closely related Stipa species in wax ester synthesis under drought stress. JOURNAL OF EXPERIMENTAL BOTANY 2020; 71:4159-4170. [PMID: 32309855 PMCID: PMC7475244 DOI: 10.1093/jxb/eraa194] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/07/2019] [Accepted: 04/17/2020] [Indexed: 06/02/2023]
Abstract
Natural selection drives local adaptations of species to biotic or abiotic environmental stresses. As a result, adaptive phenotypic divergence can evolve among related species living in different habitats. However, the genetic foundation of this divergence process remains largely unknown. Two closely related alpine grass species, Stipa capillacea and Stipa purpurea, are distributed in different rainfall regions of northern Tibet. Here, we analyzed the drought tolerance of these two closely related Stipa species, and found that S. purpurea was more resistance to drought stress than S. capillacea. To further understand the genetic diversity behind their adaptation to drought environments, a comprehensive gene repertoire was generated using PacBio isoform and Illumina RNA sequencing technologies. Bioinformatics analyses revealed that differential transcripts were mainly enriched in the wax synthetic pathway, and a threonine residue at position 239 of WSD1 was identified as having undergone positive selection in S. purpurea. Using heterologous expression in the Saccharomyces cerevisiae mutant H1246, site-directed mutagenesis studies demonstrated that a positive selection site results in changes to the wax esters profile. This difference may play an important role in S. purpurea in response to drought conditions, indicating that S. purpurea has evolved specific strategies involving its wax biosynthetic pathway as part of its long-term adaptation to the Qinghai-Tibet Plateau.
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Affiliation(s)
- Yunqiang Yang
- CAS Key Laboratory for Plant Diversity and Biogeography of East Asia, Kunming Institute of Botany, Chinese Academy of Science, Kunming, China
- Plant Germplasm and Genomics Center, Kunming Institute of Botany, Chinese Academy of Sciences, Kunming, China
- Institute of Tibetan Plateau Research at Kunming, Kunming Institute of Botany, Chinese Academy of Sciences, Kunming, China
| | - Zhili Zhou
- CAS Key Laboratory for Plant Diversity and Biogeography of East Asia, Kunming Institute of Botany, Chinese Academy of Science, Kunming, China
- Plant Germplasm and Genomics Center, Kunming Institute of Botany, Chinese Academy of Sciences, Kunming, China
- Institute of Tibetan Plateau Research at Kunming, Kunming Institute of Botany, Chinese Academy of Sciences, Kunming, China
| | - Yan Li
- CAS Key Laboratory for Plant Diversity and Biogeography of East Asia, Kunming Institute of Botany, Chinese Academy of Science, Kunming, China
- Plant Germplasm and Genomics Center, Kunming Institute of Botany, Chinese Academy of Sciences, Kunming, China
- Institute of Tibetan Plateau Research at Kunming, Kunming Institute of Botany, Chinese Academy of Sciences, Kunming, China
- University of Chinese Academy of Sciences, Beijing, China
| | - Yanqiu Lv
- College of Life Sciences, Changchun Normal University, Changchun, China
| | - Danni Yang
- CAS Key Laboratory for Plant Diversity and Biogeography of East Asia, Kunming Institute of Botany, Chinese Academy of Science, Kunming, China
- Plant Germplasm and Genomics Center, Kunming Institute of Botany, Chinese Academy of Sciences, Kunming, China
- Institute of Tibetan Plateau Research at Kunming, Kunming Institute of Botany, Chinese Academy of Sciences, Kunming, China
- University of Chinese Academy of Sciences, Beijing, China
| | - Shihai Yang
- CAS Key Laboratory for Plant Diversity and Biogeography of East Asia, Kunming Institute of Botany, Chinese Academy of Science, Kunming, China
- Plant Germplasm and Genomics Center, Kunming Institute of Botany, Chinese Academy of Sciences, Kunming, China
- Institute of Tibetan Plateau Research at Kunming, Kunming Institute of Botany, Chinese Academy of Sciences, Kunming, China
| | - Jianshuang Wu
- Functional Biodiversity, Dahlem Center of Plant Sciences, Free University of Berlin, Berlin, Germany
| | - Xiong Li
- CAS Key Laboratory for Plant Diversity and Biogeography of East Asia, Kunming Institute of Botany, Chinese Academy of Science, Kunming, China
- Plant Germplasm and Genomics Center, Kunming Institute of Botany, Chinese Academy of Sciences, Kunming, China
- Institute of Tibetan Plateau Research at Kunming, Kunming Institute of Botany, Chinese Academy of Sciences, Kunming, China
| | - Zhijia Gu
- CAS Key Laboratory for Plant Diversity and Biogeography of East Asia, Kunming Institute of Botany, Chinese Academy of Science, Kunming, China
| | - Xudong Sun
- CAS Key Laboratory for Plant Diversity and Biogeography of East Asia, Kunming Institute of Botany, Chinese Academy of Science, Kunming, China
- Plant Germplasm and Genomics Center, Kunming Institute of Botany, Chinese Academy of Sciences, Kunming, China
- Institute of Tibetan Plateau Research at Kunming, Kunming Institute of Botany, Chinese Academy of Sciences, Kunming, China
| | - Yongping Yang
- CAS Key Laboratory for Plant Diversity and Biogeography of East Asia, Kunming Institute of Botany, Chinese Academy of Science, Kunming, China
- Plant Germplasm and Genomics Center, Kunming Institute of Botany, Chinese Academy of Sciences, Kunming, China
- Institute of Tibetan Plateau Research at Kunming, Kunming Institute of Botany, Chinese Academy of Sciences, Kunming, China
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28
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Ishizuka W, Hikosaka K, Ito M, Morinaga SI. Temperature-related cline in the root mass fraction in East Asian wild radish along the Japanese archipelago. BREEDING SCIENCE 2020; 70:321-330. [PMID: 32714054 PMCID: PMC7372020 DOI: 10.1270/jsbbs.18201] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 12/21/2018] [Accepted: 01/05/2020] [Indexed: 06/11/2023]
Abstract
Wild plants with a wide distribution, including those exposed to a wide variety of environmental conditions, may have variations in key functional traits relevant for agricultural applications. The East Asian wild radish (Raphanus sativus var. raphanistroides) is an appropriate model plant because it is widely distributed and has outstanding sink capacity as well as two cultivars within the species. Multiple common garden trials with 14 populations and three testing sites were conducted across the Japanese archipelago to quantify variations in yield and allocation. Significant inter-population variations and interaction effects with testing sites were detected for the root and shoot mass and the root mass fraction (RMF). While the rank order of the population changed drastically among sites and the variance components of genetic effects were small in yield traits (2.4%-4.7%), RMF displayed a large genetic variance (23.2%) and was consistently higher in the northern populations at all sites. Analyses revealed that the mean temperature of growing season of the seed origin was the most prominent factor explaining variation in RMF, irrespective of the sites. We concluded that the trait of resource allocation had a temperature-related cline and plants in cooler climates could invest more resources into their roots.
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Affiliation(s)
- Wataru Ishizuka
- Forestry Research Institute, Hokkaido Research Organization, Kosyunai, Bibai, Hokkaido 079-0198, Japan
| | - Kouki Hikosaka
- Graduate School of Life Sciences, Tohoku University, Aoba, Sendai, Miyagi 980-8578, Japan
| | - Motomi Ito
- Graduate School of Arts and Sciences, the University of Tokyo, 3-8-1 Komaba, Meguro, Tokyo 153-8902, Japan
| | - Shin-Ichi Morinaga
- College of Bioresource Sciences, Nihon University, 1866 Kameino, Fujisawa, Kanagawa 252-0880, Japan
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29
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Miller AD, Coleman MA, Clark J, Cook R, Naga Z, Doblin MA, Hoffmann AA, Sherman CDH, Bellgrove A. Local thermal adaptation and limited gene flow constrain future climate responses of a marine ecosystem engineer. Evol Appl 2020; 13:918-934. [PMID: 32431743 PMCID: PMC7232764 DOI: 10.1111/eva.12909] [Citation(s) in RCA: 23] [Impact Index Per Article: 5.8] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/27/2019] [Revised: 11/13/2019] [Accepted: 12/09/2019] [Indexed: 01/02/2023] Open
Abstract
Rising ocean temperatures and extreme temperature events have precipitated declines and local extinctions in many marine species globally, but patterns of loss are often uneven across species ranges for reasons that are poorly understood. Knowledge of the extent of local adaptation and gene flow may explain such patterns and help predict future trajectories under scenarios of climate change. We test the extent to which local differentiation in thermal tolerance is influenced by gene flow and local adaptation using a widely distributed intertidal seaweed (Hormosira banksii) from temperate Australia. Population surveys across ~2,000 km of the species range revealed strong genetic structuring at regional and local scales (global F ST = 0.243) reflecting extremely limited gene flow, while common garden experiments (14-day exposures to 15, 18, 21°C) revealed strong site differences in early development and mortality in response to elevated temperature. Embryos from many sites spanning a longitudinal thermal gradient showed suppressed development and increased mortality to elevated water temperatures, but populations originating from warmer and more variable thermal environments tended to be less susceptible to warming. Notably, there was significant local-scale variation in the thermal responses of embryos within regions which was corroborated by the finding of small-scale genetic differences. We expect the observed genetic and phenotypic differentiation to lead to uneven responses to warming sea surface temperatures in this important marine foundation species. The study highlights the challenges of predicting species responses to thermal stress and the importance of management strategies that incorporate evolutionary potential for "climate-proofing" marine ecosystems.
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Affiliation(s)
- Adam D. Miller
- School of Life and Environmental SciencesCentre for Integrative EcologyDeakin UniversityGeelongVic.Australia
- Deakin Genomics CentreDeakin UniversityGeelongVic.Australia
| | | | - Jennifer Clark
- Climate Change ClusterUniversity of Technology SydneySydneyNSWAustralia
- Department of BotanyUniversity of British ColumbiaVancouverBCCanada
| | - Rachael Cook
- School of Life and Environmental SciencesCentre for Integrative EcologyDeakin UniversityGeelongVic.Australia
| | - Zuraya Naga
- School of Life and Environmental SciencesCentre for Integrative EcologyDeakin UniversityGeelongVic.Australia
| | | | - Ary A. Hoffmann
- School of BioSciencesBio21 InstituteThe University of MelbourneParkvilleVic.Australia
| | - Craig D. H. Sherman
- School of Life and Environmental SciencesCentre for Integrative EcologyDeakin UniversityGeelongVic.Australia
- Deakin Genomics CentreDeakin UniversityGeelongVic.Australia
| | - Alecia Bellgrove
- School of Life and Environmental SciencesCentre for Integrative EcologyDeakin UniversityGeelongVic.Australia
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30
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Van Buskirk J, Jansen van Rensburg A. Relative importance of isolation‐by‐environment and other determinants of gene flow in an alpine amphibian. Evolution 2020; 74:962-978. [DOI: 10.1111/evo.13955] [Citation(s) in RCA: 15] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/15/2019] [Revised: 02/26/2020] [Accepted: 03/09/2020] [Indexed: 02/07/2023]
Affiliation(s)
- Josh Van Buskirk
- Department of Evolutionary Biology and Environmental StudiesUniversity of Zurich Zurich 8057 Switzerland
| | - Alexandra Jansen van Rensburg
- Department of Evolutionary Biology and Environmental StudiesUniversity of Zurich Zurich 8057 Switzerland
- School of Biological SciencesUniversity of Bristol Bristol BS8 1TQ United Kingdom
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31
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Magaña Ugarte R, Escudero A, Sánchez Mata D, Gavilán RG. Changes in Foliar Functional Traits of S. pyrenaicus subsp. carpetanus under the Ongoing Climate Change: A Retrospective Survey. PLANTS (BASEL, SWITZERLAND) 2020; 9:E395. [PMID: 32210120 PMCID: PMC7154879 DOI: 10.3390/plants9030395] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/04/2020] [Revised: 03/16/2020] [Accepted: 03/18/2020] [Indexed: 05/27/2023]
Abstract
The sensitivity of stomatal behavior and patterning (i.e., distribution, density, size) to environmental stimuli, renders them crucial for defining the physiological performance of leaves. Thus, assessing long-term modifications in stomatal traits in conserved specimens arises as a valuable eco-physiological approach to predict how the rising trend of warmer, drier summers could affect plant fitness; particularly in mountain areas already experiencing climate aggravation and lacking the related monitoring schemes like Mediterranean high-mountains. Variations in foliar and stomatal traits were studied in conserved specimens of Senecio pyrenaicus subsp. carpetanus from Sierra de Guadarrama over the past 71 years. Our findings revealed decreasing trends in leaf width, stomatal size, and increasing tendency in stomatal density, all correlated with the recent 30-year climate exacerbation in these mountains. This evidenced a positive selection favoring traits that allow safeguarding plant performance under drier, hotter weather conditions. The significant relation between stomatal traits and climatic variables upholds the role of stomatal patterning in sensing environmental cues in this species, feasibly optimizing physiological responses involved in the growth-water loss trade-off. The transition to smaller, densely packed stomata observed in recent decades could indicate local-adaptive plasticity in this species, enhancing stomatal response, as coarser environmental conditions take place in Sierra de Guadarrama.
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Affiliation(s)
- Rosina Magaña Ugarte
- Unidad de Botánica, Departamento de Farmacología, Farmacognosia y Botánica, Facultad de Farmacia, Universidad Complutense de Madrid, 28040 Madrid, Spain; (D.S.M.); (R.G.G.)
| | - Adrián Escudero
- Departamento de Biología y Geología, Física y Química Inorgánica, Universidad Rey Juan Carlos, 28933 Móstoles, Madrid, Spain;
| | - Daniel Sánchez Mata
- Unidad de Botánica, Departamento de Farmacología, Farmacognosia y Botánica, Facultad de Farmacia, Universidad Complutense de Madrid, 28040 Madrid, Spain; (D.S.M.); (R.G.G.)
| | - Rosario G. Gavilán
- Unidad de Botánica, Departamento de Farmacología, Farmacognosia y Botánica, Facultad de Farmacia, Universidad Complutense de Madrid, 28040 Madrid, Spain; (D.S.M.); (R.G.G.)
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32
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Krushelnycky PD, Felts JM, Robichaux RH, Barton KE, Litton CM, Brown MD. Clinal variation in drought resistance shapes past population declines and future management of a threatened plant. ECOL MONOGR 2020. [DOI: 10.1002/ecm.1398] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/05/2022]
Affiliation(s)
- Paul D. Krushelnycky
- Department of Plant and Environmental Protection Sciences University of Hawaiʻi at Mānoa Honolulu Hawaiʻi 96822 USA
| | - Jesse M. Felts
- Resources Management Division Haleakalā National Park Makawao Hawaiʻi 96768 USA
| | - Robert H. Robichaux
- Department of Ecology and Evolutionary Biology University of Arizona Tucson Arizona 85721 USA
| | - Kasey E. Barton
- Department of Botany University of Hawaiʻi at Mānoa Honolulu Hawaiʻi 96822 USA
| | - Creighton M. Litton
- Department of Natural Resources and Environmental Management University of Hawaiʻi at Mānoa Honolulu Hawaiʻi 96822 USA
| | - Matthew D. Brown
- Resources Management Division Haleakalā National Park Makawao Hawaiʻi 96768 USA
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Adaptations in Imperata cylindrica (L.) Raeusch. and Cenchrus ciliaris L. for altitude tolerance. Biologia (Bratisl) 2019. [DOI: 10.2478/s11756-019-00380-2] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022]
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Fustier MA, Martínez-Ainsworth NE, Aguirre-Liguori JA, Venon A, Corti H, Rousselet A, Dumas F, Dittberner H, Camarena MG, Grimanelli D, Ovaskainen O, Falque M, Moreau L, de Meaux J, Montes-Hernández S, Eguiarte LE, Vigouroux Y, Manicacci D, Tenaillon MI. Common gardens in teosintes reveal the establishment of a syndrome of adaptation to altitude. PLoS Genet 2019; 15:e1008512. [PMID: 31860672 PMCID: PMC6944379 DOI: 10.1371/journal.pgen.1008512] [Citation(s) in RCA: 18] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/09/2019] [Revised: 01/06/2020] [Accepted: 11/07/2019] [Indexed: 12/14/2022] Open
Abstract
In plants, local adaptation across species range is frequent. Yet, much has to be discovered on its environmental drivers, the underlying functional traits and their molecular determinants. Genome scans are popular to uncover outlier loci potentially involved in the genetic architecture of local adaptation, however links between outliers and phenotypic variation are rarely addressed. Here we focused on adaptation of teosinte populations along two elevation gradients in Mexico that display continuous environmental changes at a short geographical scale. We used two common gardens, and phenotyped 18 traits in 1664 plants from 11 populations of annual teosintes. In parallel, we genotyped these plants for 38 microsatellite markers as well as for 171 outlier single nucleotide polymorphisms (SNPs) that displayed excess of allele differentiation between pairs of lowland and highland populations and/or correlation with environmental variables. Our results revealed that phenotypic differentiation at 10 out of the 18 traits was driven by local selection. Trait covariation along the elevation gradient indicated that adaptation to altitude results from the assembly of multiple co-adapted traits into a complex syndrome: as elevation increases, plants flower earlier, produce less tillers, display lower stomata density and carry larger, longer and heavier grains. The proportion of outlier SNPs associating with phenotypic variation, however, largely depended on whether we considered a neutral structure with 5 genetic groups (73.7%) or 11 populations (13.5%), indicating that population stratification greatly affected our results. Finally, chromosomal inversions were enriched for both SNPs whose allele frequencies shifted along elevation as well as phenotypically-associated SNPs. Altogether, our results are consistent with the establishment of an altitudinal syndrome promoted by local selective forces in teosinte populations in spite of detectable gene flow. Because elevation mimics climate change through space, SNPs that we found underlying phenotypic variation at adaptive traits may be relevant for future maize breeding.
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Affiliation(s)
- Margaux-Alison Fustier
- Génétique Quantitative et Evolution – Le Moulon, Université Paris-Saclay, Institut National de Recherche pour l’Agriculture, l’Alimentation et l’Environnement, Centre National de la Recherche Scientifique, AgroParisTech, Gif-sur-Yvette, France
| | - Natalia E. Martínez-Ainsworth
- Génétique Quantitative et Evolution – Le Moulon, Université Paris-Saclay, Institut National de Recherche pour l’Agriculture, l’Alimentation et l’Environnement, Centre National de la Recherche Scientifique, AgroParisTech, Gif-sur-Yvette, France
| | - Jonás A. Aguirre-Liguori
- Departamento de Ecología Evolutiva, Instituto de Ecología, Universidad Nacional Autónoma de México, Ciudad de México, Mexico
| | - Anthony Venon
- Génétique Quantitative et Evolution – Le Moulon, Université Paris-Saclay, Institut National de Recherche pour l’Agriculture, l’Alimentation et l’Environnement, Centre National de la Recherche Scientifique, AgroParisTech, Gif-sur-Yvette, France
| | - Hélène Corti
- Génétique Quantitative et Evolution – Le Moulon, Université Paris-Saclay, Institut National de Recherche pour l’Agriculture, l’Alimentation et l’Environnement, Centre National de la Recherche Scientifique, AgroParisTech, Gif-sur-Yvette, France
| | - Agnès Rousselet
- Génétique Quantitative et Evolution – Le Moulon, Université Paris-Saclay, Institut National de Recherche pour l’Agriculture, l’Alimentation et l’Environnement, Centre National de la Recherche Scientifique, AgroParisTech, Gif-sur-Yvette, France
| | - Fabrice Dumas
- Génétique Quantitative et Evolution – Le Moulon, Université Paris-Saclay, Institut National de Recherche pour l’Agriculture, l’Alimentation et l’Environnement, Centre National de la Recherche Scientifique, AgroParisTech, Gif-sur-Yvette, France
| | - Hannes Dittberner
- Institute of Botany, University of Cologne Biocenter, Cologne, Germany
| | - María G. Camarena
- Campo Experimental Bajío, InstitutoNacional de Investigaciones Forestales, Agrícolas y Pecuarias, Celaya, Mexico
| | - Daniel Grimanelli
- UMR Diversité, Adaptation et Développement des plantes, Université de Montpellier, Institut de Recherche pour le développement, Montpellier, France
| | - Otso Ovaskainen
- Organismal and Evolutionary Biology Research Programme, University of Helsinki, Helsinki, Finland
- Centre for Biodiversity Dynamics, Department of Biology, Norwegian University of Science and Technology, Trondheim, Norway
| | - Matthieu Falque
- Génétique Quantitative et Evolution – Le Moulon, Université Paris-Saclay, Institut National de Recherche pour l’Agriculture, l’Alimentation et l’Environnement, Centre National de la Recherche Scientifique, AgroParisTech, Gif-sur-Yvette, France
| | - Laurence Moreau
- Génétique Quantitative et Evolution – Le Moulon, Université Paris-Saclay, Institut National de Recherche pour l’Agriculture, l’Alimentation et l’Environnement, Centre National de la Recherche Scientifique, AgroParisTech, Gif-sur-Yvette, France
| | - Juliette de Meaux
- Institute of Botany, University of Cologne Biocenter, Cologne, Germany
| | - Salvador Montes-Hernández
- Campo Experimental Bajío, InstitutoNacional de Investigaciones Forestales, Agrícolas y Pecuarias, Celaya, Mexico
| | - Luis E. Eguiarte
- Departamento de Ecología Evolutiva, Instituto de Ecología, Universidad Nacional Autónoma de México, Ciudad de México, Mexico
| | - Yves Vigouroux
- UMR Diversité, Adaptation et Développement des plantes, Université de Montpellier, Institut de Recherche pour le développement, Montpellier, France
| | - Domenica Manicacci
- Génétique Quantitative et Evolution – Le Moulon, Université Paris-Saclay, Institut National de Recherche pour l’Agriculture, l’Alimentation et l’Environnement, Centre National de la Recherche Scientifique, AgroParisTech, Gif-sur-Yvette, France
| | - Maud I. Tenaillon
- Génétique Quantitative et Evolution – Le Moulon, Université Paris-Saclay, Institut National de Recherche pour l’Agriculture, l’Alimentation et l’Environnement, Centre National de la Recherche Scientifique, AgroParisTech, Gif-sur-Yvette, France
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Paudel BR, Dyer AG, Garcia JE, Shrestha M. The effect of elevational gradient on alpine gingers ( Roscoea alpina and R. purpurea) in the Himalayas. PeerJ 2019; 7:e7503. [PMID: 31576232 PMCID: PMC6753920 DOI: 10.7717/peerj.7503] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/21/2019] [Accepted: 07/17/2019] [Indexed: 11/20/2022] Open
Abstract
There is currently enormous interest in how morphological and physiological responses of herbaceous plants may be affected by changing elevational gradient. Mountain regions provide an excellent opportunity to understand how closely related species may adapt to the conditions that rapidly change with elevation. We investigated the morphological and physiological responses of two Himalayan alpine gingers (Roscoea alpina and R. purpurea) along two different vertical transects of 400 m, R. purpurea between 2,174-2,574 m a.s.l and R. alpina between 2,675-3,079 m a.s.l. We measured the variables of plant height, leaf length, leaf area, specific leaf area, and stomata density at five plots, along the vertical transect at an elevational gap of ca. 100 m. Results revealed that with increased elevation plant height, and leaf area decreased while stomata density increased, whereas changes in specific leaf area, were not correlated with the elevation. Our results reveal that these alpine gingers undergo local adaptation by modifying their plant height, leaf area and stomata density in response to the varying selection pressure associated with the elevational gradient. Thus, the findings of this research provide valuable information on how a narrow range of elevational gradient affects the herbaceous plants at the alpine habitat of the Himalayas.
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Affiliation(s)
- Babu Ram Paudel
- Yunnan Key Laboratory of Plant Reproductive Adaption and Evolutionary Ecology, Yunnan University, Kunming, Yunnan, China
- Laboratory of Ecology and Evolutionary Biology, State Key Laboratory for Conservation and Utilization of Bio-Resources in Yunnan, Yunnan University, Kunming, Yunnan, China
- Department of Botany, Prithvi Narayan Campus, Tribhuvan University, Pokhara, Gandaki, Nepal
| | - Adrian G. Dyer
- School of Media and Communication, RMIT University, Melbourne, Victoria, Australia
| | - Jair E. Garcia
- School of Media and Communication, RMIT University, Melbourne, Victoria, Australia
| | - Mani Shrestha
- School of Media and Communication, RMIT University, Melbourne, Victoria, Australia
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Loria A, Cristescu ME, Gonzalez A. Mixed evidence for adaptation to environmental pollution. Evol Appl 2019; 12:1259-1273. [PMID: 31417613 PMCID: PMC6691217 DOI: 10.1111/eva.12782] [Citation(s) in RCA: 21] [Impact Index Per Article: 4.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/08/2018] [Accepted: 02/12/2019] [Indexed: 12/25/2022] Open
Abstract
Adaptation to pollution has been studied since the first observations of heavy metal tolerance in plants decades ago. To document micro-evolutionary responses to pollution, researchers have used phenotypic, molecular genetics, and demographic approaches. We reviewed 258 articles and evaluated the evidence for adaptive responses following exposure to a wide range of pollutants, across multiple taxonomic groups. We also conducted a meta-analysis to calculate the magnitude of phenotypic change in invertebrates in response to metal pollution. The majority of studies that reported differences in responses to pollution were focused on phenotypic responses at the individual level. Most of the studies that used demographic assays in their investigations found that negative effects induced by pollution often worsened over multiple generations. Our meta-analysis did not reveal a significant relationship between metal pollution intensity and changes in the traits studied, and this was probably due to differences in coping responses among different species, the broad array of abiotic and biotic factors, and the weak statistical power of the analysis. We found it difficult to make broad statements about how likely or how common adaptation is in the presence of environmental contamination. Ecological and evolutionary responses to contamination are complex, and difficult to interpret in the context of taxonomic, and methodological biases, and the inconsistent set of approaches that have been used to study adaptation to pollution in the laboratory and in the field. This review emphasizes the need for: (a) long-term monitoring programs on exposed populations that link demography to phenotypic, genetic, and selection assays; (b) the use of standardized protocols across studies especially for similar taxa. Approaches that combine field and laboratory studies offer the greatest opportunity to reveal the complex eco-evolutionary feedback that can occur under selection imposed by pollution.
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Kesselring H, Hamann E, Armbruster GFJ, Stöcklin J, Scheepens JF. Local adaptation is stronger between than within regions in alpine populations of Anthyllis vulneraria. Evol Ecol 2019. [DOI: 10.1007/s10682-019-09999-8] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
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Mertens A, Brys R, Schouppe D, Jacquemyn H. The impact of floral morphology on genetic differentiation in two closely related biennial plant species. AOB PLANTS 2018; 10:ply051. [PMID: 30323915 PMCID: PMC6178171 DOI: 10.1093/aobpla/ply051] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 11/14/2017] [Accepted: 09/05/2018] [Indexed: 06/08/2023]
Abstract
The genetic diversity and structure of plant populations are determined by the interaction of three distinct processes: gene flow, genetic drift and natural selection. These processes are to some extent dependent on the mating system of plants, which in turn is largely determined by floral morphology and the level of herkogamy in particular. In this study, we used molecular markers to investigate the impact of floral morphology on genetic differentiation and structure in two closely related Centaurium species that display large variation in floral morphology across two distinct geographic regions in Europe (mainland Europe and the UK). Our results showed that genetic differences between regions and populations within regions were similar for both species, but that patterns of genetic structure largely depended on the observed variation in floral morphology. Populations of Centaurium erythraea showed higher genetic differentiation and clear isolation by distance (IBD) in mainland Europe, but limited IBD in the UK. Opposite patterns were found in Centaurium littorale, with higher genetic differentiation and significant IBD in populations sampled in the UK and lower genetic differentiation in Continental populations with no pattern of IBD. Overall, these results indicate that variation in floral morphology has a profound impact on structuring of genetic diversity, with populations displaying low levels of herkogamy showing the strongest patterns of genetic structuring and the reverse pattern in populations showing high levels of herkogamy.
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Affiliation(s)
- Arne Mertens
- Department of Biology, Plant Conservation and Population Biology, KU Leuven, Leuven, Belgium
| | - Rein Brys
- Research Institute for Nature and Forest, Geraardsbergen, Belgium
| | - Dorien Schouppe
- Department of Biology, Plant Conservation and Population Biology, KU Leuven, Leuven, Belgium
| | - Hans Jacquemyn
- Department of Biology, Plant Conservation and Population Biology, KU Leuven, Leuven, Belgium
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39
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Bertel C, Rešetnik I, Frajman B, Erschbamer B, Hülber K, Schönswetter P. Natural selection drives parallel divergence in the mountain plant Heliosperma pusillum
s.l. OIKOS 2018. [DOI: 10.1111/oik.05364] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/03/2023]
Affiliation(s)
- Clara Bertel
- Dept. of Botany; Univ. of Innsbruck, Sternwartestraße 15; AT-6020 Innsbruck Austria
| | | | - Božo Frajman
- Dept. of Botany; Univ. of Innsbruck, Sternwartestraße 15; AT-6020 Innsbruck Austria
| | - Brigitta Erschbamer
- Dept. of Botany; Univ. of Innsbruck, Sternwartestraße 15; AT-6020 Innsbruck Austria
| | - Karl Hülber
- Dept of Botany and Biodiversity Research; Univ. of Vienna; Vienna Austria
| | - Peter Schönswetter
- Dept. of Botany; Univ. of Innsbruck, Sternwartestraße 15; AT-6020 Innsbruck Austria
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40
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Mediterranean Islands Hosting Marginal and Peripheral Forest Tree Populations: The Case of Pinus brutia Ten. in Cyprus. FORESTS 2018. [DOI: 10.3390/f9090514] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/03/2023]
Abstract
Mediterranean islands have served as important Tertiary and glacial refuges, hosting important peripheral and ecologically marginal forest tree populations. These populations, presumably harboring unique gene complexes, are particularly interesting in the context of climate change. Pinus brutia Ten. is widespread in the eastern Mediterranean Basin and in Cyprus in particular it is the most common tree species. This study evaluated genetic patterns and morphoanatomical local adaptation along the species geographical distribution and altitudinal range in Cyprus. Analysis showed that the Cyprus population of P. brutia is a peripheral population with high genetic diversity, comprised of different subpopulations. Evidence suggests the presence of ongoing dynamic evolutionary processes among the different subpopulations, while the most relic and isolated subpopulations exhibited a decreased genetic diversity compared to the most compact subpopulations in the central area of the island. These results could be the consequence of the small size and prolonged isolation of the former. Comparing populations along an altitude gradient, higher genetic diversity was detected at the middle level. The phenotypic plasticity observed is particularly important for the adaptive potential of P. brutia in an island environment, since it allows rapid change in local environmental conditions.
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41
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Hämälä T, Mattila TM, Savolainen O. Local adaptation and ecological differentiation under selection, migration, and drift in Arabidopsis lyrata. Evolution 2018; 72:1373-1386. [PMID: 29741234 DOI: 10.1111/evo.13502] [Citation(s) in RCA: 42] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/22/2018] [Accepted: 05/03/2018] [Indexed: 12/19/2022]
Abstract
How the balance between selection, migration, and drift influences the evolution of local adaptation has been under intense theoretical scrutiny. Yet, empirical studies that relate estimates of local adaptation to quantification of gene flow and effective population sizes have been rare. Here, we conducted a reciprocal transplant trial, a common garden trial, and a whole-genome-based demography analysis to examine these effects among Arabidopsis lyrata populations from two altitudinal gradients in Norway. Demography simulations indicated that populations within the two gradients are connected by gene flow (0.1 < 4Ne m < 11) and have small effective population sizes (Ne < 6000), suggesting that both migration and drift can counteract local selection. However, the three-year field experiments showed evidence of local adaptation at the level of hierarchical multiyear fitness, attesting to the strength of differential selection. In the lowland habitat, local superiority was associated with greater fecundity, while viability accounted for fitness differences in the alpine habitat. We also demonstrate that flowering time differentiation has contributed to adaptive divergence between these locally adapted populations. Our results show that despite the estimated potential of gene flow and drift to hinder differentiation, selection among these A. lyrata populations has resulted in local adaptation.
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Affiliation(s)
- Tuomas Hämälä
- Department of Ecology and Genetics, University of Oulu, FI-90014 Oulu, Finland
- Biocenter Oulu, University of Oulu, FI-90014 Oulu, Finland
| | - Tiina M Mattila
- Department of Ecology and Genetics, University of Oulu, FI-90014 Oulu, Finland
| | - Outi Savolainen
- Department of Ecology and Genetics, University of Oulu, FI-90014 Oulu, Finland
- Biocenter Oulu, University of Oulu, FI-90014 Oulu, Finland
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42
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Halbritter AH, Fior S, Keller I, Billeter R, Edwards PJ, Holderegger R, Karrenberg S, Pluess AR, Widmer A, Alexander JM. Trait differentiation and adaptation of plants along elevation gradients. J Evol Biol 2018. [PMID: 29518274 DOI: 10.1111/jeb.13262] [Citation(s) in RCA: 61] [Impact Index Per Article: 10.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/16/2023]
Abstract
Studies of genetic adaptation in plant populations along elevation gradients in mountains have a long history, but there has until now been neither a synthesis of how frequently plant populations exhibit adaptation to elevation nor an evaluation of how consistent underlying trait differences across species are. We reviewed studies of adaptation along elevation gradients (i) from a meta-analysis of phenotypic differentiation of three traits (height, biomass and phenology) from plants growing in 70 common garden experiments; (ii) by testing elevation adaptation using three fitness proxies (survival, reproductive output and biomass) from 14 reciprocal transplant experiments; (iii) by qualitatively assessing information at the molecular level, from 10 genomewide surveys and candidate gene approaches. We found that plants originating from high elevations were generally shorter and produced less biomass, but phenology did not vary consistently. We found significant evidence for elevation adaptation in terms of survival and biomass, but not for reproductive output. Variation in phenotypic and fitness responses to elevation across species was not related to life history traits or to environmental conditions. Molecular studies, which have focussed mainly on loci related to plant physiology and phenology, also provide evidence for adaptation along elevation gradients. Together, these studies indicate that genetically based trait differentiation and adaptation to elevation are widespread in plants. We conclude that a better understanding of the mechanisms underlying adaptation, not only to elevation but also to environmental change, will require more studies combining the ecological and molecular approaches.
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Affiliation(s)
- Aud H Halbritter
- Department of Biological Sciences, University of Bergen, Bergen, Norway.,Institute of Integrative Biology, ETH Zürich, Zürich, Switzerland
| | - Simone Fior
- Institute of Integrative Biology, ETH Zürich, Zürich, Switzerland
| | - Irene Keller
- Department of Clinical Research and Swiss Institute of Bioinformatics, University of Bern, Bern, Switzerland
| | - Regula Billeter
- Institute of Natural Resource Sciences, ZHAW Wädenswil, Wädenswil, Switzerland
| | - Peter J Edwards
- Institute of Integrative Biology, ETH Zürich, Zürich, Switzerland
| | - Rolf Holderegger
- Institute of Integrative Biology, ETH Zürich, Zürich, Switzerland.,Swiss Federal Research Institute for Forest, Snow and Landscape WSL, Birmensdorf, Switzerland
| | - Sophie Karrenberg
- Department of Ecology and Genetics, Uppsala University, Uppsala, Sweden
| | - Andrea R Pluess
- Swiss Federal Research Institute for Forest, Snow and Landscape WSL, Birmensdorf, Switzerland
| | - Alex Widmer
- Institute of Integrative Biology, ETH Zürich, Zürich, Switzerland
| | - Jake M Alexander
- Institute of Integrative Biology, ETH Zürich, Zürich, Switzerland.,Department of Ecology and Evolution, University of Lausanne, Lausanne, Switzerland
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Dagnino D, Minuto L, Casazza G. Divergence is not enough: the use of ecological niche models for the validation of taxon boundaries. PLANT BIOLOGY (STUTTGART, GERMANY) 2017; 19:1003-1011. [PMID: 28691341 DOI: 10.1111/plb.12600] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/01/2016] [Accepted: 07/04/2017] [Indexed: 06/07/2023]
Abstract
Delimiting taxon boundaries is crucial for any evolutionary research and conservation regulation. In order to avoid mistaken description of species, the approach of integrative taxonomy recommends considering multidisciplinary lines of evidence, including ecology. Unfortunately, ecological data are often difficult to quantify objectively. Here we test and discuss the potential use of ecological niche models for validating taxon boundaries, using three pairs of closely related plant taxa endemic to the south-western Alps as a case study. We also discuss the application of ecological niche models for species delimitation and the implementation of different approaches. Niche overlap, niche equivalency and niche similarity were assessed both in multidimensional environmental space and in geographic space to look for differences in the niche of three pairs of closely related plant taxa. We detected a high degree of niche differentiation between taxa although this result seems not due to differences in habitat selection. The different statistical tests gave contrasting outcomes between environmental and geographic spaces. According to our results, niche divergence does not seem to support taxon boundaries at species level, but may have had important consequences for local adaptation and in generating phenotypic diversity at intraspecific level. Environmental space analysis should be preferred to geographic space as it provides more clear results. Even if the different analyses widely disagree in their conclusions about taxon boundaries, our study suggests that ecological niche models may help taxonomists to reach a decision.
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Affiliation(s)
- D Dagnino
- Dipartimento di Scienze della Terra, Ambiente e Vita, Università degli Studi di Genova, Genova, Italy
| | - L Minuto
- Dipartimento di Scienze della Terra, Ambiente e Vita, Università degli Studi di Genova, Genova, Italy
| | - G Casazza
- Dipartimento di Scienze della Terra, Ambiente e Vita, Università degli Studi di Genova, Genova, Italy
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44
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Geange SR, Briceño VF, Aitken NC, Ramirez-Valiente JA, Holloway-Phillips MM, Nicotra AB. Phenotypic plasticity and water availability: responses of alpine herb species along an elevation gradient. ACTA ACUST UNITED AC 2017. [DOI: 10.1186/s40665-017-0033-8] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
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Hirst MJ, Griffin PC, Sexton JP, Hoffmann AA. Testing the niche‐breadth–range‐size hypothesis: habitat specialization vs. performance in Australian alpine daisies. Ecology 2017; 98:2708-2724. [DOI: 10.1002/ecy.1964] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 03/21/2017] [Revised: 06/24/2017] [Accepted: 07/13/2017] [Indexed: 12/27/2022]
Affiliation(s)
- Megan J. Hirst
- Bio21 Institute School of Biosciences The University of Melbourne Parkville Victoria 3010 Australia
- The Royal Botanic Gardens of Victoria Melbourne Victoria 3141 Australia
| | - Philippa C. Griffin
- Bio21 Institute School of Biosciences The University of Melbourne Parkville Victoria 3010 Australia
- Melbourne Bioinformatics and EMBL Australia Bioinformatics Resource The University of Melbourne 187 Grattan Street Carlton Victoria 3053 Australia
| | - Jason P. Sexton
- School of Natural Sciences University of California Merced California 95343 USA
| | - Ary A. Hoffmann
- Bio21 Institute School of Biosciences The University of Melbourne Parkville Victoria 3010 Australia
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46
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Sánchez AM, Alonso-Valiente P, Albert MJ, Escudero A. How might edaphic specialists in gypsum islands respond to climate change? Reciprocal sowing experiment to infer local adaptation and phenotypic plasticity. ANNALS OF BOTANY 2017; 120:135-146. [PMID: 28510631 PMCID: PMC5737687 DOI: 10.1093/aob/mcx046] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/19/2016] [Accepted: 04/05/2017] [Indexed: 06/07/2023]
Abstract
BACKGROUND AND AIMS Local adaptation and phenotypic plasticity are considered key mechanisms for coping with climate warming, especially for plant species that inhabit island-like habitats. In Spain a complete guild of edaphic specialists, most of them threatened, occurs in gypsum outcrops, but how these species will respond to climate change has received little attention. METHODS A reciprocal sowing experiment was performed to determine the extent of local adaptation and phenotypic plasticity in five gypsophytes with contrasting distributions along a climate gradient. Germination, seedling growth and survival were recorded during a 4-year period. KEY RESULTS Plants responded plastically according to their positions along the regional climate gradient, as well as locally between matched locations. All species exhibited highly plastic responses and stress-tolerant behaviours, especially in terms of seedling survival during summer drought. However, no evidence of local adaptation was detected in any of the locations, where local individuals never performed better than those from other sites. In some sites, both germination and seedling recruitment were higher irrespective of parent plant origin. CONCLUSIONS The lack of local adaptation to drought displayed at the regeneration stage indicates limited capacity for in situ genetic response to new climate scenarios. Nevertheless, a plastic response along the climatic gradient does suggest a wider species-level capacity to enable these edaphic specialists to cope with increasing aridity over coming decades.
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Affiliation(s)
- Ana M. Sánchez
- Área de Biodiversidad y Conservación, Universidad Rey Juan Carlos, C/Tulipán s/n, 28933 Móstoles, Madrid, Spain
| | - Patricia Alonso-Valiente
- Área de Biodiversidad y Conservación, Universidad Rey Juan Carlos, C/Tulipán s/n, 28933 Móstoles, Madrid, Spain
| | - M. José Albert
- Área de Biodiversidad y Conservación, Universidad Rey Juan Carlos, C/Tulipán s/n, 28933 Móstoles, Madrid, Spain
| | - Adrián Escudero
- Área de Biodiversidad y Conservación, Universidad Rey Juan Carlos, C/Tulipán s/n, 28933 Móstoles, Madrid, Spain
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47
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Pfennigwerth AA, Bailey JK, Schweitzer JA. Trait variation along elevation gradients in a dominant woody shrub is population-specific and driven by plasticity. AOB PLANTS 2017; 9:plx027. [PMID: 28721188 PMCID: PMC5509947 DOI: 10.1093/aobpla/plx027] [Citation(s) in RCA: 18] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/12/2016] [Accepted: 06/15/2017] [Indexed: 05/24/2023]
Abstract
Elevation gradients are frequently used as space-for-time substitutions to infer species' trait responses to climate change. However, studies rarely investigate whether trait responses to elevation are widespread or population-specific within a species, and the relative genetic and plastic contributions to such trait responses may not be well understood. Here, we examine plant trait variation in the dominant woody shrub, Rhododendron maximum, along elevation gradients in three populations in the South Central Appalachian Mountains, USA, in both field and common garden environments. We ask the following: (i) do plant traits vary along elevation? (ii) do trait responses to elevation differ across populations, and if so, why? and (iii) does genetic differentiation or phenotypic plasticity drive trait variation within and among populations? We found that internode length, shoot length, leaf dry mass, and leaf area varied along elevation, but that these responses were generally unique to one population, suggesting that trait responses to environmental gradients are population-specific. A common garden experiment identified no genetic basis to variation along elevation or among populations in any trait, suggesting that plasticity drives local and regional trait variation and may play a key role in the persistence of plant species such as R. maximum with contemporary climate change. Overall, our findings highlight the importance of examining multiple locations in future elevation studies and indicate that, for a given plant species, the magnitude of trait responses to global climate change may vary by location.
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Affiliation(s)
- Alix A. Pfennigwerth
- Department of Ecology and Evolutionary Biology, University of Tennessee, 569 Dabney Hall, Knoxville, TN 37996-0001, USA
| | - Joseph K. Bailey
- Department of Ecology and Evolutionary Biology, University of Tennessee, 569 Dabney Hall, Knoxville, TN 37996-0001, USA
| | - Jennifer A. Schweitzer
- Department of Ecology and Evolutionary Biology, University of Tennessee, 569 Dabney Hall, Knoxville, TN 37996-0001, USA
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Meng H, Wei X, Franklin SB, Wu H, Jiang M. Geographical variation and the role of climate in leaf traits of a relict tree species across its distribution in China. PLANT BIOLOGY (STUTTGART, GERMANY) 2017; 19:552-561. [PMID: 28294500 DOI: 10.1111/plb.12564] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/03/2017] [Accepted: 03/08/2017] [Indexed: 06/06/2023]
Abstract
Intraspecific trait variation and trait-climate relationships are crucial for understanding a species' response to climate change. However, these phenomena have rarely been studied for tree species. Euptelea pleiospermum is a relict tree species with a wide distribution in China that offers a novel opportunity to examine such relationships. Here, we measured 13 leaf traits of E. pleiospermum in 20 sites across its natural distribution in China. We investigated the extent of trait variation at local and regional scales, and developed geographic and climate models to explain trait variation at the regional scale. We documented intraspecific trait variation among leaf traits of E. pleiospermum at local and regional scales. Five traits exhibited relatively high trait variation: leaf area, leaf density and three leaf economic traits (leaf dry matter content, specific leaf area [SLA] and leaf phosphorus concentration). Significant trait-geography correlations were mediated by local climate. Most leaf trait variation could be explained (from 24% to 64%) by geographic or climate variables, except leaf width, leaf thickness, leaf dry matter content and leaf length-width ratio. Latitude and temperature were the strongest predictors of trait variation throughout the distribution of E. pleiospermum in China, and temperature explained more leaf trait variation than precipitation. In particular, we showed that leaves had longer petiole lengths, higher SLA and lower densities in northern E. pleiospermum populations. We suggest that northern E. pleiospermum populations are adapting to higher latitudinal environments via high growth rate (higher SLA) and low construction investment strategies (lower leaf densities), benefitting northern migration. Overall, we demonstrate that intraspecific trait variation reflects E. pleiospermum response to the local environment. We call for consideration of intraspecific trait variation to examine specific climate response questions. In addition, provenance experiments using widely distributed species are needed to separate trait variation resulting from genetic differentiation and plastic responses to environmental change.
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Affiliation(s)
- H Meng
- Key Laboratory of Aquatic Botany and Watershed Ecology, Wuhan Botanical Garden, Chinese Academy of Sciences, Wuhan, Hubei, China
- University of Chinese Academy of Sciences, Beijing, China
| | - X Wei
- Key Laboratory of Aquatic Botany and Watershed Ecology, Wuhan Botanical Garden, Chinese Academy of Sciences, Wuhan, Hubei, China
| | - S B Franklin
- Department of Biological Sciences, University of Northern Colorado, Greeley, USA
| | - H Wu
- Key Laboratory of Aquatic Botany and Watershed Ecology, Wuhan Botanical Garden, Chinese Academy of Sciences, Wuhan, Hubei, China
- University of Chinese Academy of Sciences, Beijing, China
| | - M Jiang
- Key Laboratory of Aquatic Botany and Watershed Ecology, Wuhan Botanical Garden, Chinese Academy of Sciences, Wuhan, Hubei, China
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Wadgymar SM, Daws SC, Anderson JT. Integrating viability and fecundity selection to illuminate the adaptive nature of genetic clines. Evol Lett 2017; 1:26-39. [PMID: 30283636 PMCID: PMC6121800 DOI: 10.1002/evl3.3] [Citation(s) in RCA: 50] [Impact Index Per Article: 7.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/19/2016] [Revised: 03/15/2017] [Accepted: 03/20/2017] [Indexed: 12/18/2022] Open
Abstract
Genetically based trait variation across environmental gradients can reflect adaptation to local environments. However, natural populations that appear well-adapted often exhibit directional, not stabilizing, selection on ecologically relevant traits. Temporal variation in the direction of selection could lead to stabilizing selection across multiple episodes of selection, which might be overlooked in short-term studies that evaluate relationships of traits and fitness under only one set of conditions. Furthermore, nonrandom mortality prior to trait expression can bias inferences about trait evolution if viability selection opposes fecundity selection. Here, we leveraged fitness and trait data to test whether phenotypic clines are genetically based and adaptive, whether temporal variation in climate imposes stabilizing selection, and whether viability selection acts on adult phenotypes. We monitored transplants of the subalpine perennial forb, Boechera stricta (Brassicaceae), in common gardens at two elevations over 2-3 years that differed in drought intensity. We quantified viability, and fecundity fitness components for four heritable traits: specific leaf area, integrated water-use efficiency, height at first flower, and flowering phenology. Our results indicate that genetic clines are maintained by selection, but their expression is context dependent, as they do not emerge in all environments. Moreover, selection varied spatially and temporally. Stabilizing selection was most pronounced when we integrated data across years. Finally, viability selection prior to trait expression targeted adult phenotypes (age and size at flowering). Indeed, viability selection for delayed flowering opposed fecundity selection for accelerated flowering; this result demonstrates that neglecting to account for viability selection could lead to inaccurate conclusions that populations are maladapted. Our results suggest that reconciling clinal trait variation with selection requires data collected across multiple spatial scales, time frames, and life-history stages.
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Affiliation(s)
- Susana M Wadgymar
- Department of Genetics and Odum School of Ecology University of Georgia Athens Georgia 30602
| | - S Caroline Daws
- Department of Ecology, Evolution and Behavior University of Minnesota St. Paul Minnesota 55108
| | - Jill T Anderson
- Department of Genetics and Odum School of Ecology University of Georgia Athens Georgia 30602
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50
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Porter CK, Benkman CW. Assessing the Potential Contributions of Reduced Immigrant Viability and Fecundity to Reproductive Isolation. Am Nat 2017; 189:580-591. [DOI: 10.1086/691191] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/03/2022]
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