A5016303304- Plant and animal studies
- Plant Diversity and Evolution
- Genetic diversity and population structure
- Plant and Fungal Species Descriptions
- Ecology and Vegetation Dynamics Studies
- Genomics and Phylogenetic Studies
- Plant Reproductive Biology
- Plant Parasitism and Resistance
- Plant Taxonomy and Phylogenetics
- Species Distribution and Climate Change
- Botany and Plant Ecology Studies
- Chromosomal and Genetic Variations
- Mediterranean and Iberian flora and fauna
- Plant Pathogens and Resistance
- Plant Pathogens and Fungal Diseases
- Plant Ecology and Taxonomy Studies
- Evolution and Paleontology Studies
- Enzyme Production and Characterization
- Botany, Ecology, and Taxonomy Studies
- Biofuel production and bioconversion
- Polysaccharides and Plant Cell Walls
- Plant Molecular Biology Research
- Molecular Biology Techniques and Applications
- Plant biochemistry and biosynthesis
- Microbial Metabolic Engineering and Bioproduction
University of Zurich
2016-2025
Life Science Zurich
2016-2022
Zero to Three
2022
Institute of Plant Biology
2008
Universidade Estadual de Feira de Santana
2006
Istituto Sperimentale per la Zootecnia
2006
University of Wisconsin–Madison
1991-2004
University of South Dakota
2004
Royal Botanic Garden Sydney
2004
Yale University
2004
We present the results of two exploratory parsimony analyses DNA sequences from 475 and 499 species seed plants, respectively, representing all major taxonomic groups.The data are exclusively chloroplast gene rbcL, which codes for large subunit ribulose-1,5-bisphosphate carboxylase/oxygenase (RuBisCO or RuBPCase).We used different state-transformation assumptions resulting in sets cladograms: (i) equal-weighting 499-taxon analysis; (ii) a procedure that differentially weights transversions...
Progress in genome sequencing now enables the large-scale generation of reference genomes. Various international initiatives aim to generate genomes representing global biodiversity. These provide unique insights into genomic diversity and architecture, thereby enabling comprehensive analyses population functional genomics, are expected revolutionize conservation genomics.
Fungal symbiosis with early land plants Hundreds of millions years ago, evolved descendants aquatic began showing up on dry land. These newly terrestrialized species had to deal increased ultraviolet light exposure, desiccation, and less accessible nutrients. Rich et al. show how mutualist fungi may have helped these nascent plant lineages adaptation their challenging environment (see the Perspective by Bouwmeester). Genetic metabolic analysis a liverwort as representative such suggests that...
Some of the most interesting but still contentious disjunct biogeographical distributions involve Southern Hemisphere tropical and warm temperate families. The PHMV clade Myrtales includes four families (Psiloxylaceae, Heteropyxidaceae, Myrtaceae, Vochysiaceae) that exhibit a number these patterns. related Psiloxylaceae Heteropyxidaceae are small restricted in distribution to recent volcanic Mascarene Islands east Madagascar southeast Africa, respectively. Myrtaceae found on three major...
Despite the remarkable species richness of Mediterranean flora and its well-known geological history, few studies have investigated temporal spatial origins. Most importantly, relative contribution processes long-distance dispersal to composition contemporary biotas remains largely unknown. We used phylogenetic analyses sequences from six chloroplast DNA markers, Bayesian dating methods, ancestral area reconstructions, in combination with paleogeographic, paleoclimatic, ecological evidence,...
Although recent methodological advances have allowed the incorporation of rate variation in molecular dating analyses, calibration procedure, performed mainly through fossils, remains resistant to improvements. One source uncertainty pertains assignment fossils specific nodes a phylogeny, especially when alternative possibilities exist that can be equally justified on morphological grounds. Here we expand recently developed fossil cross-validation method evaluate whether nodal assignments...
Abstract Aim The Irano‐Turanian ( IT ) floristic region is characterized by high levels of endemicity. Despite its potential role as a cradle xerophytic taxa for neighbouring areas, biogeographical history remains poorly studied. H aplophyllum , diagnostic element the region, was used model to discriminate between alternative scenarios evolution and, more specifically, investigate whether it served source xerophytes colonization Mediterranean Basin. Location (Central Asia and West Asiatic...
The flowering plant Primula veris is a common spring blooming perennial that widely cultivated throughout Europe. This species an established model system in the study of genetics, evolution, and ecology heterostylous floral polymorphisms. Despite long history research focused on this related species, continued development has been restricted due absence genomic transcriptomic resources.We present here de novo draft genome assembly P. covering 301.8 Mb, or approximately 63% estimated 479.22...
Heterostyly is a wide-spread floral adaptation to promote outbreeding, yet its genetic basis and evolutionary origin remain poorly understood. In Primula (primroses), heterostyly controlled by the S-locus supergene that determines reciprocal arrangement of reproductive organs incompatibility between two morphs. However, identities component genes unknown. Here, we identify CYP734A50 gene, encoding putative brassinosteroid-degrading enzyme, as G locus style-length dimorphism. only present on...
Ongoing rapid climate change is predicted to cause local extinction of plant species in mountain regions. However, some could have persisted during Quaternary oscillations without shifting their range, despite the limited evidence from fossils. Here, we tested two candidate mechanisms persistence by comparing macrorefugia and microrefugia (MR) hypotheses. We used rare endemic Saxifraga florulenta as a model taxon combined ensembles distribution models (SDMs) with high-resolution...
The exceptional species diversity of flowering plants, exceeding that their sister group more than 250-fold, is especially evident in floral innovations, interactions with pollinators and sexual systems. Multiple theories, emphasizing flower-pollinator interactions, genetic effects mating systems or high evolvability, predict evolution profoundly affects angiosperm diversification. However, consequences for speciation extinction dynamics remain poorly understood. Here, we investigate...
Summary Different strategies to reduce selfing and promote outcrossing have evolved in hermaphroditic flowers. Heterostyly, a complex floral polymorphism that occurs at least 27 families of angiosperms, is hypothesized achieve both goals by optimizing cross‐pollination ( via disassortative pollen transfer) restricting gamete wastage autogamy the reduction sexual interference between male female organs). In heterostylous flowers, reciprocal positioning organs different morphs incompatibility...
Abstract Aim Despite the accumulation of cases describing fast radiations alpine plants, we still have limited understanding drivers speciation in floras and precise timing their diversification. Here, investigated spatial temporal patterns three groups Primulaceae. Location Mountains European Alpine System. Methods We built a new phylogeny Primulaceae including all species focal groups: Androsace sect. Aretia , Primula Auricula Soldanella . Combining phylogenetic information with detailed...
The taxonomy of pines (genus Pinus) is widely accepted and a robust gene tree based on entire plastome sequences exists. However, there large discrepancy in estimated divergence times major pine clades among existing studies, mainly due to differences fossil placement dating methods used. We currently lack dated molecular phylogeny that makes use the rich record, this study first estimate dates number fossils (21) evenly distributed across all clades, combination with applying both node tip...
Abstract Supergenes are nonrecombining genomic regions ensuring the coinheritance of multiple, coadapted genes. Despite importance supergenes in adaptation, little is known on how they originate. A classic example supergene S locus controlling heterostyly, a floral heteromorphism occurring 28 angiosperm families. In Primula, heterostyly characterized by cooccurrence two complementary, self-incompatible morphs and controlled five genes clustered hemizygous, ca. 300-kb locus. Here, we present...
Despite intensive morphological and chemical studies on the Myrtales, circumscription of order remains poorly defined. To test monophyly Myrtales sensu Dahlgren Thorne ( Annals Missouri Botanical Garden 71: 633‐694, 1984), determine relationships some controversial families, identify most likely sister group we conducted parsimony analyses 80 rbc L sequences representing 36 taxa from families traditionally included in 44 other Rosidae. The consensus tree resulting these supports is...
Senna (Leguminosae) is a large, widespread genus that includes species with enantiostylous, asymmetric flowers and extrafloral nectaries. Clarification of phylogenetic relationships within based on parsimony analyses three chloroplast regions (rpS16, rpL16, matK) provides new insights the evolution floral symmetry Our results support monophyly only one (Psilorhegma) six currently recognized sections, while Chamaefistula, Peiranisia, are paraphyletic, monotypic Astroites Paradictyon nested...
The large genus Saxifraga , which consists of ≈400 morphologically and cytologically diverse species, has long been considered taxonomically complex. Phylogenetic analysis over 2500 bp chloroplast sequence data derived from mat K rbc L was employed to examine relationships among sections the segregate genera Zahlbrucknera, Saxifragopsis Cascadia these taxa other Saxifragaceae sensu stricto. trees resulting separate analyses sequences were highly congruent; phylogenetic a combined K– matrix...
Numerous phenotypic (morphological, palynological, cytological, and anatomical) studies have been conducted on Myrtales, yet the detailed relationships among families of order remain elusive. In this paper, rbcL sequences 50 taxa (39 representatives Myrtales 11 rosid outgroups) were analyzed using parsimony maximum likelihood to provide a phylogenetic hypothesis intraordi- nal in Myrtales. The congruence between data from an earlier study topology was assessed identify potential...
Primula (c. 430 species) and relatives (Primulaceae) are paradigmatic to our understanding of distyly. However, the common co-occurrence distyly monomorphy in closely related groups within family has made interpretation its evolution difficult.Here, we infer a chloroplast DNA (cpDNA) phylogeny for 207 accessions, including 51% species 95% sections with monomorphic populations, using Bayesian methods. With this tree, distribution ancestral states on critical nodes parsimony likelihood The...
Evolutionary biologists have long endeavored to document how many species exist on Earth, understand the processes by which biodiversity waxes and wanes, interpret spatial patterns of biodiversity, infer evolutionary relationships. Despite great potential this knowledge improve science, conservation, policy, generally devoted limited attention these broader implications. Likewise, workers in science underappreciated fundamental relevance biology. The aim article is summarize illustrate some...