The Experts below are selected from a list of 312 Experts worldwide ranked by ideXlab platform
Douglas C Daly - One of the best experts on this subject based on the ideXlab platform.
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A new Andean species of Protium. Studies in neotropical Burseraceae XXIX
Brittonia, 2020Co-Authors: Douglas C Daly, Carlos Augusto Reynel-rodríguez, Robin Fernández-hilarioAbstract:Protium oxapampae is described and illustrated. The Burseraceae are well-known for being a diverse and often dominant group in Amazonia, but this species exemplifies the under-appreciated and to a large extent undescribed diversity of the family in the Andes. Protium oxapampae es descrito e ilustrado. Las Burseraceae son bien conocidas por ser un grupo diverso y a menudo dominante en la Amazonía, pero esta especie es un ejemplo de que conforman una familia poco considerada con presencia escasamente descrita para los Andes.
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A new Andean species of Protium. Studies in neotropical Burseraceae XXIX
Brittonia, 2020Co-Authors: Douglas C Daly, Carlos Augusto Reynel-rodríguez, Robin Fernández-hilarioAbstract:Protium oxapampae is described and illustrated. The Burseraceae are well-known for being a diverse and often dominant group in Amazonia, but this species exemplifies the under-appreciated and to a large extent undescribed diversity of the family in the Andes.
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New species of Protium sect. Tetragastris from the Andes, the Brazilian Cerrado, and Amazonia. Studies in Neotropical Burseraceae XXVIII.
Brittonia, 2020Co-Authors: Douglas C DalyAbstract:Protium acrense, P. cerradicola and P. yanachagae are described and illustrated, and a key to the twelve species of Protium sect. Tetragastris is provided. Recent botanical exploration is revealing that the Andes constitute a minor center of the Burseraceae diversity that has yielded at least one new species in this section (described here). The other two, now that they have been distinguished from P. altissimum , segregate satisfactorily by geography and habitat.
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A new identity for Tetragastris panamensis . Studies in neotropical Burseraceae XXIX
Brittonia, 2019Co-Authors: Douglas C DalyAbstract:The taxon heretofore known as Tetragastris panamensis is widespread in tropical Central and South America and often common where it occurs. All recent phylogenies for Burseraceae tribe Protieae strongly support submerging Tetragastris as a section of a more inclusive Protium. A recent smorgasbord of nomenclatural changes coined a new name for T. panamensis because the epithet is already occupied in Protium. That is unnecessary, however, because the taxon can be given the next most recent available name from a heterotypic synonym: Protium stevensonii.
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Leaf Transcriptome Assembly of Protium copal (Burseraceae) and Annotation of Terpene Biosynthetic Genes
Genes, 2019Co-Authors: Gabriel Damasco, Douglas C Daly, Vikram S. Shivakumar, Tracy M. Misciewicz, Paul V A FineAbstract:Plants in the Burseraceae are globally recognized for producing resins and essential oils with medicinal properties and have economic value. In addition, most of the aromatic and non-aromatic components of Burseraceae resins are derived from a variety of terpene and terpenoid chemicals. Although terpene genes have been identified in model plant crops (e.g., Citrus, Arabidopsis), very few genomic resources are available for non-model groups, including the highly diverse Burseraceae family. Here we report the assembly of a leaf transcriptome of Protium copal, an aromatic tree that has a large distribution in Central America, describe the functional annotation of putative terpene biosynthetic genes and compare terpene biosynthetic genes found in P. copal with those identified in other Burseraceae taxa. The genomic resources of Protium copal can be used to generate novel sequencing markers for population genetics and comparative phylogenetic studies, and to investigate the diversity and evolution of terpene genes in the Burseraceae.
Judith X. Becerra - One of the best experts on this subject based on the ideXlab platform.
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An Ethnopharmacological, Phytochemical and Pharmacological Review on Lignans from Mexican Bursera spp.
MDPI AG, 2018Co-Authors: Maria Carla Marcotullio, Massimo Curini, Judith X. BecerraAbstract:The genus Bursera belongs to the family Burseraceae and has been used in traditional Mexican medicine for treating various pathophysiological disorders. The most representative phytochemicals isolated from this genus are terpenoids and lignans. Lignans are phenolic metabolites known for their antioxidant, apoptotic, anti-cancer, anti-inflammatory, anti-bacterial, anti-viral, anti-fungal, and anti-protozoal properties. Though the genus includes more than 100 species, we have attempted to summarize the biological activities of the 34 lignans isolated from selected Mexican Bursera plants
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The monophyly of Bursera and its impact for divergence times of Burseraceae
TAXON, 2012Co-Authors: Judith X. Becerra, Koji Noge, Sarai Olivier, D. Lawrence VenableAbstract:Bursera is one of the most diverse and abundant groups of trees and shrubs of the Mexican tropical dry forests. Its interaction with its specialist herbivores in the chrysomelid genus Blepharida, is one of the best-studied coevolutionary systems. Prior studies based on molecular phylogenies concluded that Bursera is a monophyletic genus. Recently, however, other molecular analyses have suggested that the genus might be paraphyletic, with the closely related Commiphora, nested within Bursera. If this is correct, then interpretations of coevolution results would have to be revised. Whether Bursera is or is not monophyletic also has implications for the age of Burseraceae, since previous dates were based on calibrations using Bursera fossils assuming that Bursera was paraphyletic. We performed a phylogenetic analysis of 76 species and varieties of Bursera, 51 species of Commiphora, and 13 outgroups using nuclear DNA data. We also reconstructed a phylogeny of the Burseraceae using 59 members of the family, 9 outgroups and nuclear and chloroplast sequence data. These analyses strongly confirm previous conclusions that this genus is monophyletic. New calculations of the age of Burseraceae date the beginning of its diversification to at least 93 million years ago.
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2-PHENYLETHANOL IN THE LEAVES OF BURSERA VELUTINA BULLOCK (Burseraceae)
Acta Botanica Mexicana, 2011Co-Authors: Koji Noge, D. Lawrence Venable, Judith X. BecerraAbstract:the volatile composition of the leaves of Bursera velutina Bullock (Burseraceae) was determined by a gas chromatograph-mass spectrometer (G c–M s). the major component found was 2-phenylethanol (29.5%). This is the first report of 2-phenylethanol in the leaves of a species of the genus Bursera . in addition, B. velutina also produces monoterpenes, sesquiterpenes, diterpenes and alkanes, making it a species with one of the most complex chemical compositions in the genus. this diverse and unique blend of compounds may play an important role in plant defense against its herbivores.
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germacrene d a common sesquiterpene in the genus bursera Burseraceae
Molecules, 2009Co-Authors: Koji Noge, Judith X. BecerraAbstract:Abstract: The volatile components of the leaves of five Bursera species, B . copallifera , B . exselsa , B . mirandae , B . ruticola and B . fagaroides var. purpusii were determined by gas chromatography–mass spectrometry (GC–MS). Germacrene D was one of the predominant components (15.1–56.2%) of all of these species. Germacrene D has also been found in other Bursera species and some species of Commiphora , the sister group of Bursera , suggesting that the production of germacrene D might be an ancient trait in the genus Bursera . Keywords: Bursera ; Burseraceae; germacrene D; monoterpenes; sesquiterpenes 1. Introduction The genus Bursera (Burseraceae) comprises approximately 100 species with a geographical distribution extending from the southwestern United States to Peru. The genus predominates in the tropical dry forests of Mexico where about 85 species coexist and about 75 of them are endemic [1–3]. The genus Bursera is divided into two sections, Bullockia and Bursera . Bursera release their resins when they are attacked by their herbivore,
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insects on plants macroevolutionary chemical trends in host use
Science, 1997Co-Authors: Judith X. BecerraAbstract:Determining the macroevolutionary importance of plant chemistry on herbivore host shifts is critical to understanding the evolution of insect-plant interactions. Molecular phylogenies of the ancient and speciose Blepharida (Coleoptera)– Bursera (Burseraceae) system were reconstructed and terpenoid chemical profiles for the plant species obtained. Statistical analyses show that the historical patterns of host shifts strongly correspond to the patterns of host chemical similarity, indicating that plant chemistry has played a significant role in the evolution of host shifts by phytophagous insects.
Andrea Weeks - One of the best experts on this subject based on the ideXlab platform.
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Molecular phylogenetics and molecular clock dating of Sapindales based on plastid rbcL, atpB and trnL-trnF DNA sequences
Taxon, 2016Co-Authors: Alexandra N. Muellner-riehl, Andrea Weeks, Joshua W. Clayton, Sven Buerki, Lars Nauheimer, Yu-chung Chiang, Sarah Cody, Susan K PellAbstract:This study focuses on reconstructing the time-calibrated phylogeny of the nine families comprising the order Sapindales, representing a diverse and economically important group of eudicots including citrus, mahogany, tree-of-heaven, cashew, mango, pistachio, frankincense, myrrh, lychee, rambutan, maple, and buckeye. We sampled three molecular markers, plastid genes rbcL and atpB, and the trnL-trnLF spacer region, and covered one-third of the generic diversity of Sapindales. All three markers produced congruent phylogenies using maximum likelihood and Bayesian methods for a set of taxa that included outgroups, i.e., members of the closely related orders Brassicales and Malvales, and the more distantly related Crossosomatales, Ranunculales, and Ceratophyllales. All results confirmed the current delimitation of the families within Sapindales, and the monophyly of the order. Concerning inter-familial relationships, Biebersteiniaceae and Nitrariaceae formed a basal grade (or sister clade) to the rest of Sapindales with moderate support. The sister relationship of Kirkiaceae to Anacardiaceae and Burseraceae was strongly supported. The clade combining Anacardiaceae and Burseraceae as well as the clade combining Meliaceae, Simaroubaceae, and Rutaceae each received strong support. The sister relationship between Meliaceae and Simaroubaceae was moderately supported. The position of Sapindaceae could not be resolved with confidence. The Sapindales separated from their sister clade, comprising Brassicales and Malvales, in the Early Cretaceous at ca. 112 Ma, and diversified into the nine families from ca. 105 Ma until ca. 87 Ma during Early to Late Cretaceous times. Biebersteiniaceae and Nitrariaceae have the longest stem lineages observed in Sapindales, possibly indicating that extinction may have had a greater role in shaping their extant diversity than elsewhere within the order. Divergence within the larger families (Anacardiaceae, Burseraceae, Meliaceae, Rutaceae, Sapindaceae, Simaroubaceae) started during the Late Cretaceous, extending into the Paleogene and Neogene.
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to move or to evolve contrasting patterns of intercontinental connectivity and climatic niche evolution in terebinthaceae anacardiaceae and Burseraceae
Frontiers in Genetics, 2014Co-Authors: Andrea Weeks, Felipe Zapata, Susan K Pell, Douglas C Daly, John D Mitchell, Paul V A FineAbstract:Many angiosperm families are distributed pantropically, yet for any given continent little is known about which lineages are ancient residents or recent arrivals. Here we use a comprehensive sampling of the pantropical sister pair Anacardiaceae and Burseraceae to assess the relative importance of continental vicariance, long-distance dispersal and niche-conservatism in generating its distinctive pattern of diversity over time. Each family has approximately the same number of species and identical stem age, yet Anacardiaceae display a broader range of fruit morphologies and dispersal strategies and include species that can withstand freezing temperatures, whereas Burseraceae do not. We found that nuclear and chloroplast data yielded a highly supported phylogenetic reconstruction that supports current taxonomic concepts and time-calibrated biogeographic reconstructions that are broadly congruent with the fossil record. We conclude that the most recent common ancestor of these families was widespread and likely distributed in the Northern Hemisphere during the Cretaceous and that vicariance between Eastern and Western Hemispheres coincided with the initial divergence of the families. The tempo of diversification of the families is strikingly different. Anacardiaceae steadily accumulated lineages starting in the Late Cretaceous–Paleocene while the majority of Burseraceae diversification occurred in the Miocene. Multiple dispersal- and vicariance-based intercontinental colonization events are inferred for both families throughout the past 100 million years. However, Anacardiaceae have shifted climatic niches frequently during this time, while Burseraceae have experienced very few shifts between dry and wet climates and only in the tropics. Thus, we conclude that both Anacardiaceae and Burseraceae move easily but that Anacardiaceae have adapted more often, either due to more varied selective pressures or greater intrinsic lability.
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Development of Novel, Exon-Primed Intron-Crossing (EPIC) Markers from EST Databases and Evaluation of their Phylogenetic Utility in Commiphora (Burseraceae)
Wiley, 2014Co-Authors: Morgan R. Gostel, Andrea WeeksAbstract:Premise of the study: Novel nuclear exon-primed intron-crossing (EPIC) markers were developed to increase phylogenetic resolution among recently diverged lineages in the frankincense and myrrh family, Burseraceae, using Citrus, Arabidopsis, and Oryza genome resources. Methods and Results: Primer pairs for 48 nuclear introns were developed using the genome resource IntrEST and were screened using species of Commiphora and other Burseraceae taxa. Four putative intron regions (RPT6A, BXL2, mtATP Synthase D, and Rab6) sequenced successfully for multiple taxa and recovered phylogenies consistent with those of existing studies. In some cases, these regions yielded informative sequence variation on par with that of the nuclear ribosomal DNA internal transcribed spacer. Conclusions: The combination of freely available genome resources and our design criteria have uncovered four single-copy nuclear intron regions that are useful for phylogenetic reconstruction of Burseraceae taxa. Because our EPIC primers also amplify Arabidopsis, we recommend their trial in other rosid and eudicot lineages
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the phylogenetic history and biogeography of the frankincense and myrrh family Burseraceae based on nuclear and chloroplast sequence data
Molecular Phylogenetics and Evolution, 2005Co-Authors: Andrea Weeks, Douglas C Daly, Beryl B SimpsonAbstract:Generalized hypotheses for the vicariant, Gondwanan origin of pantropically distributed eudicotyledon families must be refined to accommodate recently revised dates that indicate major continental rifting events predate the evolution of many tricolpate angiosperm clades. Here, we use molecular phylogenies of an eudicotyledon family previously hypothesized to have a Gondwanan origin, the Burseraceae, to test this and other alternative biogeographical hypotheses in light of recalibrated geological events. Phylogenies based on nuclear and chloroplast data were reconstructed for 13 of the 18 genera (50 spp. total) of Burseraceae using parsimony, maximum likelihood, and Bayesian methods. Ages of all lineages were estimated using penalized likelihood and semiparametric rate smoothing [Bioinformatics 2003 (19) 301], which allows the user to calibrate phylogenies based on non-clock-like DNA sequence data with fossil information. Biogeographical hypotheses were tested by comparing ages of species and more inclusive lineages with their extant and most parsimonious ancestral distributions. Our data support a North American Paleocene origin for the Burseraceae followed by dispersal of ancestral lineages to eastern Laurasia and Southern Hemisphere continents.
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Molecular genetic evidence for interspecific hybridization among endemic Hispaniolan bursera (Burseraceae)
American journal of botany, 2004Co-Authors: Andrea Weeks, Beryl B SimpsonAbstract:Historically, genetic introgression among species as well as hybrid origins for species of the diploid tree genus Bursera (Burseraceae) have been proposed based on the supposition that individuals morphologically intermediate between sympatric ‘‘parent’’ species must be derived from hybridization. This study reports the first molecular genetic evidence for both unidirectional and reciprocal interspecific hybridization within Bursera. Phylogenies of hybrids and other species in B. subgenus Bursera are reconstructed based on nuclear and chloroplast sequence data. Compelling evidence supports the hybrid origin of three endemic Hispaniolan species: B. brunea (B. nashii 3 B. simaruba), B. gracilipes (B. spinescens 3 B. simaruba), and B. ovata (B. simaruba 3 B. spinescens). Cloning studies of nuclear markers from B. ovata suggests that this species is an introgressed or later backcross generation hybrid and thus reproduces sexually. Bursera is a member of the frankincense and myrrh family (Burseraceae) and comprises approximately 100 species of frost-intolerant trees that range from southern Arizona, USA,
Beryl B Simpson - One of the best experts on this subject based on the ideXlab platform.
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the phylogenetic history and biogeography of the frankincense and myrrh family Burseraceae based on nuclear and chloroplast sequence data
Molecular Phylogenetics and Evolution, 2005Co-Authors: Andrea Weeks, Douglas C Daly, Beryl B SimpsonAbstract:Generalized hypotheses for the vicariant, Gondwanan origin of pantropically distributed eudicotyledon families must be refined to accommodate recently revised dates that indicate major continental rifting events predate the evolution of many tricolpate angiosperm clades. Here, we use molecular phylogenies of an eudicotyledon family previously hypothesized to have a Gondwanan origin, the Burseraceae, to test this and other alternative biogeographical hypotheses in light of recalibrated geological events. Phylogenies based on nuclear and chloroplast data were reconstructed for 13 of the 18 genera (50 spp. total) of Burseraceae using parsimony, maximum likelihood, and Bayesian methods. Ages of all lineages were estimated using penalized likelihood and semiparametric rate smoothing [Bioinformatics 2003 (19) 301], which allows the user to calibrate phylogenies based on non-clock-like DNA sequence data with fossil information. Biogeographical hypotheses were tested by comparing ages of species and more inclusive lineages with their extant and most parsimonious ancestral distributions. Our data support a North American Paleocene origin for the Burseraceae followed by dispersal of ancestral lineages to eastern Laurasia and Southern Hemisphere continents.
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Molecular genetic evidence for interspecific hybridization among endemic Hispaniolan bursera (Burseraceae)
American journal of botany, 2004Co-Authors: Andrea Weeks, Beryl B SimpsonAbstract:Historically, genetic introgression among species as well as hybrid origins for species of the diploid tree genus Bursera (Burseraceae) have been proposed based on the supposition that individuals morphologically intermediate between sympatric ‘‘parent’’ species must be derived from hybridization. This study reports the first molecular genetic evidence for both unidirectional and reciprocal interspecific hybridization within Bursera. Phylogenies of hybrids and other species in B. subgenus Bursera are reconstructed based on nuclear and chloroplast sequence data. Compelling evidence supports the hybrid origin of three endemic Hispaniolan species: B. brunea (B. nashii 3 B. simaruba), B. gracilipes (B. spinescens 3 B. simaruba), and B. ovata (B. simaruba 3 B. spinescens). Cloning studies of nuclear markers from B. ovata suggests that this species is an introgressed or later backcross generation hybrid and thus reproduces sexually. Bursera is a member of the frankincense and myrrh family (Burseraceae) and comprises approximately 100 species of frost-intolerant trees that range from southern Arizona, USA,
Valdir Florêncio Da Veiga Junior - One of the best experts on this subject based on the ideXlab platform.
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The Chemistry and Pharmacology of the South America genus Protium Burm. f. (Burseraceae)
Pharmacognosy Reviews, 2007Co-Authors: André Luis Rüdiger, Ac Siani, Valdir Florêncio Da Veiga JuniorAbstract:The family Burseraceae is considered to contain about 700 species comprised in 18 genera. Their resiniferous trees and shrubs usually figures prominently in the ethnobotany of the regions where it occurs, given that such a property has led to the use of species of this family since ancient times for their aromatic properties and many medicinal applications. Although the family is distributed throughout tropical and subtropical regions of the world, the majority of the scientific available information is limited to Asiatic and African genera, such as Commiphora (myrrh), Canarium (elemi incense) and Boswellia (frankincense), or the genus Bursera (linaloe), occurring in Mexico. In the Neotropics, the Burseraceae family is largely represented by the genus Protium , which comprises about 135 species. The present review compiles the published chemical and pharmacological information on the South American genus Protium and updates important data since the last review reported in the scientific literature on Burseraceae species.
