Thermal niche traits of high alpine plant species and communities across the tropical Andes and their vulnerability to global warmingFrancisco Cuesta & Carolina Tovar
Aim The Climate Variability Hypothesis (CVH) predicts that locations with reduced seasonal temperature variation select for species with narrower thermal ranges. Here we (1) test the CVH by assessing the effect of latitude and elevation on the thermal ranges of Andean vascular plant species and communities, and (2) assess tropical alpine plants vulnerability to warming based on their thermal traits. Location Tropical Andes Taxon Vascular plants Methods Temperature data for 505 vascular plant species from...
Global patterns of species and evolutionary diversity in plants are primarily determined by a temperature gradient, but precipitation gradients may be more important within the tropics, where plant species richness is positively associated with the amount of rainfall. The impact of precipitation on the distribution of evolutionary diversity, however, is largely unexplored. Here we detail how evolutionary diversity varies along precipitation gradients by bringing together a comprehensive database on the composition of angiosperm tree communities...
Angiosperms are by far the most species-rich clade of land plants, but their origin and early evolutionary history remain poorly understood. We reconstructed angiosperm phylogeny based on 80 genes from 2,881 plastid genomes representing 85% of extant families and all orders. With a well-resolved plastid tree and 62 fossil calibrations, we dated the origin of the crown angiosperms to the Upper Triassic, with major angiosperm radiations occurring in the Jurassic and Lower Cretaceous. This estimated...
Mushroom-forming fungi (Agaricomycetes) have the greatest morphological diversity and complexity of any group of fungi. They have radiated into most niches and fulfill diverse roles in the ecosystem, including wood decomposers, pathogens or mycorrhizal mutualists. Despite the importance of mushroom-forming fungi, large-scale patterns of their evolutionary history are poorly known, in part due to the lack of a comprehensive and dated molecular phylogeny. Here, using multigene and genome-based data, we assemble a 5,284-species phylogenetic tree...
Data from: An allometry between seed kernel and seed coat shows greater investment in physical defense in small seedsLa-Mei Wu, Si-Chong Chen & Bo Wang
PREMISE OF THE STUDY: Numerous studies have treated the mass of a whole seed as an integrated unit, although the two components, seed kernel and seed coat, play different roles and suffer from different evolutionary selection pressures. In this study, we provided the first global-scale quantification of the relative biomass investments in seed coats and seed kernels. We tested the following hypotheses: there is a negative allometry between seed kernel mass and seed coat mass,...
Data from: Interactions between plant genome size, nutrients and herbivory by rabbits, molluscs and insects on a temperate grasslandMaïté S. Guignard, Michael J. Crawley, Dasha Kovalenko, Richard A. Nichols, Mark Trimmer, Andrew R. Leitch & Ilia J. Leitch
Angiosperm genome sizes (GS) vary c. 2,400-fold. Recent research has shown that GS influences plant abundance, and plant competition. There are also tantalising reports that herbivores may select plants as food dependent on their GS. To test the hypothesis that GS plays a role in shaping plant communities under herbivore pressure, we exploit a grassland experiment that has experimentally excluded herbivores and applied nutrient over 8 years. Using phylogenetically-informed statistical models and path analyses, we...
Plant traits are critical to plant form and function —including growth, survival and reproduction— and therefore shape fundamental aspects of population and ecosystem dynamics as well as ecosystem services. Here, we present a global species-level compilation of key functional traits for palms (Arecaceae), a plant family with keystone importance in tropical and subtropical ecosystems. We derived measurements of essential functional traits for all (>2500) palm species from key sources such as monographs, books, other scientific...
Background: Polyploidy has played a major role in angiosperm evolution. Previous studies have examined polyploid phenotypes in comparison to their extant progenitors, but not in context of predicted progenitor phenotypes at allopolyploid origin. In addition, differences in the trends of polyploid versus diploid evolution have not been investigated. We use ancestral character-state reconstructions to estimate progenitor phenotype at allopolyploid origin to determine patterns of polyploid evolution leading to morphology of the extant species. We also...
Data from: A strong east–west Mediterranean divergence supports a new phylogeographic history of the carob tree (Ceratonia siliqua, Leguminosae) and multiple domestications from native populationsJuan Viruel, Nicolas Le Galliot, Samuel Pironon, Jean Pierre Suc, Gonzalo Nieto Feliner, Fatma Lakhal-Mirleau, Marianick Juin, Marjorie Selva, Magda Bou Dagher-Kharrat, Lahcen Ouahmane, Stefano La Malfa, Katia Diadema, Hervé Sanguin, Frédéric Médail & Alex Baumel
Aim: Phylogeography of fruit trees is challenging due to the recurrent exchanges between domesticated and wild populations. Here we tested the eastern refugium hypothesis (ERH) for the carob tree, Ceratonia siliqua, which supports its natural and domestication origins in the Eastern Mediterranean and a feral origin in the West. Location: Mediterranean basin Taxon: Ceratonia siliqua L., Leguminosae Methods: Divergence time of the divergence between the carob tree and its sister species (C. oreothauma) was estimated...
Continued adaptation of C4 photosynthesis after an initial burst of changes in the Andropogoneae grassesMatheus Bianconi, Jan Hackel, Maria Vorontsova, Adriana Alberti, Watchara Arthan, Sean Burke, Melvin Duvall, Elizabeth Kellogg, Sébastien Lavergne, Michael McKain, Alexandre Meunier, Colin Osborne, Paweena Traiperm, Pascal-Antoine Christin & Guillaume Besnard
C4 photosynthesis is a complex trait that sustains fast growth and high productivity in tropical and subtropical conditions and evolved repeatedly in flowering plants. One of the major C4 lineages is Andropogoneae, a group of ~ 1,200 grass species that includes some of the world's most important crops and species dominating tropical and some temperate grasslands. Previous efforts to understand C4 evolution in the group have compared a few model C4 plants to distantly related...
Data from: Conservation of the threatened species Pulsatilla vulgaris Mill. (pasqueflower) is aided by reproductive system and polyploidyRoberta Gargiulo, Gemma Worswick, Corinne Arnold, Lindsay Pike, Robyn S. Cowan, Kate A. Hardwick, Ted Chapman & Michael F. Fay
Population loss due to habitat disturbance is a major concern in biodiversity conservation. Here we investigate the genetic causes of the demographic decline observed in English populations of Pulsatilla vulgaris and the consequences for conservation. Using ten nuclear microsatellite markers, we compare genetic variation in wild populations with restored and seed-regenerated populations (674 samples). Emergence of genetic structure and loss of allelic variation in natural populations is not as evident as expected from demographic trends....
Royal Botanic Gardens11
Chinese Academy of Sciences2
Donald Danforth Plant Science Center1
University of Buenos Aires1
State University of Norte Fluminense1
Museu Paraense Emílio Goeldi1
Northern Illinois University1
Szent István University1
Finnish Environment Institute1
MTA Biological Research Centre1