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  • Botany & Mycology 2009 - Abstract Search
    51 54 Abstract Detail Bryological and Lichenological Section ABLS Tremblay Susan 1 A Phylogenetic Approach to Investigating Liverwort Oil Body Function Liverworts possess unique membrane bound organelles called oil bodies that are found in no other green plant lineage While a number of hypotheses for oil body function have been proposed such as defense against herbivores and freezing and desiccation tolerance none have been rigorously tested and the function of

    Original URL path: http://2009.botanyconference.org/engine/search/index.php?func=detail&aid=852 (2016-02-01)
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  • Botany & Mycology 2009 - Abstract Search
    to connect to database 12 51 56 SQL Statement is null or not a SELECT 12 51 56 Abstract Detail Pteridological Section AFS Schuettpelz Eric 1 Pryer Kathleen M 1 Windham Michael 1 A phylogenetic approach to species delimitation in the fern genus Pentagramma Pteridaceae The goldback and silverback ferns of the American Southwest composing the genus Pentagramma are phylogenetically isolated within the xeric adapted cheilanthoid clade and rather unusual in exhibiting polyploidy without apomixis These ferns account for a diverse array of morphotypes cytotypes and flavonoid chemotypes However because the differences among the various entities are generally cryptic they are usually treated at an infraspecific level In recent years as many as five subspecies have been ascribed to P triangularis and only P pallida has been considered sufficiently distinct to warrant recognition as a separate second species In this study we employ nuclear and plastid DNA sequencing to uncover relationships within Pentagramma and test previous hypotheses of species delimitation We attempt to identify genetically distinct diploid lineages within the genus and characterize the origins of polyploid individuals Our approach ultimately provides a better understanding of the evolutionary history of this group and an assessment of polyploidy s role in

    Original URL path: http://2009.botanyconference.org/engine/search/index.php?func=detail&aid=511 (2016-02-01)
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  • Botany & Mycology 2009 - Abstract Search
    Ivalu 4 Berry Paul E 5 Sytsma Kenneth J 6 A phylogenomic approach to bromeliad phylogeny Slow rates of molecular divergence within Bromeliaceae have made it difficult to resolve a number of key nodes within the family Here we use DNA sequences of entire plastid genomes i e plastomes to resolve relationships among representatives of all eight subfamilies This approach provides the maximum possible information on phylogenetic relationships from the plastid genome we use the resulting data to compare results with a much more extensive taxon sampling ca 90 spp and much less extensive data sample eight plastid genes and spacers The total number of variable sites within coding regions is 5 to 15 times that in a five locus analysis and 14 to 44 times that in ndhF alone Including non coding regions greatly increase these numbers While phylogenomics provides an avalanche of data it does not relieve us of the need to complement it with adequate taxon sampling Jackknifing the taxon sampling shows that even plastome wide data can lead to distorted views of bromeliad phylogeny with inadequate taxon sampling Log in to add this item to your schedule 1 University of Wisconsin Madison Department of Botany 430

    Original URL path: http://2009.botanyconference.org/engine/search/index.php?func=detail&aid=756 (2016-02-01)
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  • Botany & Mycology 2009 - Abstract Search
    Hastingsia insights from chloroplast DNA sequences Serpentine soils throughout the Klamath Siskiyou region of southwestern Oregon and northern California form a patchy fragmented landscape These isolated outcrops contain toxic concentrations of heavy metals making them unsuitable for most plant species An incredible diversity of species inhabits serpentine but these are often rare endangered and narrowly endemic Hastingsia Agavaceae is a genus of two to four rare species that are mainly restricted to serpentine The closest relatives of this genus are thought to be Schoenolirion Chlorogalum and Camassia together comprising subfamily Chlorogaloideae Other than a close relationship between Camassia and Chlorogalum however phylogenetic relationships of these genera have gone largely unstudied Within Hastingsia recognition of two recently described species has been widely disputed due to the difficulty in consistently observing diagnostic differences To address the taxonomic status of the newly described H serpenticola and H atropurpurea and determine relationships among the genera of Chlorogaloideae we obtained DNA sequences from 36 specimens sampled across the ranges of all species of Hastingsia and one specimen from each species of Schoenolirion Chlorogalum and Camassia Two non coding loci from the chloroplast genome the rpl16 intron and trnD trnT spacer were sequenced Phylogenetic analyses in

    Original URL path: http://2009.botanyconference.org/engine/search/index.php?func=detail&aid=806 (2016-02-01)
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  • Botany & Mycology 2009 - Abstract Search
    relationships within the Potato Clade Solanum sect Pteroidea is a small section of ten species within the enormous genus Solanum The affinities of sect Pteroidea within Solanum have been enigmatic and some authors have even segregated members of the section as a separate genus Recent molecular studies however have supported the monophyly of sect Pteroidea and indicated that it is nested deeply within Solanum as member of the Potato Clade along with potato S tuberosum tomato S lycopersicum and their close relatives Other members of the Potato clade include Solanum sections Anarrhichomenum Basarthrum and Herpystichum Within the Potato Clade sect Pteroidea is most closely related to sect Herpystichum The precise relationships of groups within the Potato clade remain unclear with some analyses indicating that sections Herpystichum and Pteroidea are sister to each other and others suggesting that sect Herpystichum is a grade leading to sect Pteroidea Section Pteroidea is characterized by having inflorescences in an axillary position and by rugose sharply pointed conical fruits in most species Our analyses suggest a single origin of the unusual conical fruits with a single reversal to globose fruits in S mite Neither simple nor compound leaved species form a clade indicating frequent shifts

    Original URL path: http://2009.botanyconference.org/engine/search/index.php?func=detail&aid=80 (2016-02-01)
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  • Botany & Mycology 2009 - Abstract Search
    A phylogeny of Stipeae Poaceae Pooideae based on plastid and nuclear DNA sequence data The Stipeae tribe is a group of 400 600 grass species of worldwide distribution that are currently placed in 21 genera The needlegrasses are characterized by having single flowered spikelets and stout terminally awned awn composed of more than one vein lemmas We conducted a molecular phylogenetic study of the Stipeae 21 genera using 140 species 17 additional species were used as outgroups based on nine plastid DNA sequences trnK 5 matK matK trnH GUG psbA trnL5 trnF ndhF rps16 trnK rps16 intron rps3 and rpl32 trnL UAG and a single nuclear ITS DNA sequence Our parsimony analysis of DNA sequences supports the monophyly of the Stipeae including Macrochloa as sister to all other Stipeae the recognition of Lorenzochloa L erectifolia since it does not align with Ortachne but with some species of Aciachne and Anatherostipa Ptilagrostis s l as occurring in four separate clades and Oryzopsis as a monotypic genus O asperifolia Achnatherum and Piptatherum as currently circumscribed are polyphyletic and we provide good support to split the former into five groups Achantherum Neotrinia and a Timouria s l clade in the Old World Eriocoma and Pseudoeriocoma in the New World and the latter into four groups Achnatherum p p typica Piptatherum Miliacea in the Old World and a North American Piptatheropsis clade Achnatherum s s Austrostipa Hesperostipa Jarava s s Ortachne s s Pappostipa Piptatherum s s Piptochaetium Ptilagrostis s s Stipa s s and Trikeraia are all well supported as monophyletic genera Stipa capensis and S parviflora both of African origins are apparently misplaced and are not closely related to other species of Stipa s s but are allied to achnatheroids Based on molecular evolution of plastid sequences and lemma epidermal pattern we

    Original URL path: http://2009.botanyconference.org/engine/search/index.php?func=detail&aid=433 (2016-02-01)
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  • Botany & Mycology 2009 - Abstract Search
    Soltis Douglas E 7 Soltis Pamela S 8 Ma Hong 3 dePamphilis Claude W 3 Wing Rod 9 A Physical Map for the Amborella Genome Sheds Light on the Evolution of Angiosperm Genome Structure High information content fingerprints HICF were obtained for 32719 large insert clones from a bacterial artificial chromosome BAC library representing approximately 5 5 haploid equivalents of the Amborella trichocarpa genome The HIFC date were used to construct a draft physical map with 3106 contigs and 1356 singletons BAC end sequences BESs were generated for the fingerprinted clones comprising 48 25 Mbp or roughly 5 4 of the complete Amborella genome BAC end sequences were related to the physical map and used to identify regions of synteny between regions of the Amborella genome and the sequenced Arabidopsis Oryza Populus and Vitis genomes Regions of microsynteny were also observed in contiguously sequenced segments of the Amborella genome The sequenced genomes were compared with respect to the frequency of regions of synteny with the Amborella physical map and parsimony mapping of loss of synteny suggests a much slower rate of structural evolution in the Vitis lineage relative to the others The Amborella physical map provides a glimpse of genome structure in the last common ancestor of extant angiosperms and sets the stage for generating a complete genome sequence for Amborella Log in to add this item to your schedule Related Links Ancestral Angiosperm Genome Project 1 University of Georgia Department of Plant Biology 4504 Miller Plant Sciences Athens GA 30602 USA 2 Arizona Genomics Institute University of Arizona Plant Sciences 3 Pennsylvania State University Department of Biology Institute of Molecular Evolutionary Genetics and The Huck Institutes of the Life Sciences University Park Pennsylvania 16802 USA 4 University of Missouri Plant Biology Athens GA 30602 USA 5 University of Missouri

    Original URL path: http://2009.botanyconference.org/engine/search/index.php?func=detail&aid=734 (2016-02-01)
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  • Botany & Mycology 2009 - Abstract Search
    B 14 A plastome and nuclear gene based phylogeny for the orchid subfamily Epidendroideae Relationships among the tribes and especially the subtribes of the epidendroids remain the greatest enigma in orchid systematics As part of the Monocot AToL project we are sequencing the entire plastid genome of species representing all subtribes of Epidendroideae as well as the single copy nuclear gene PHYC These data should provide powerful new insights into the evolution of the epidendroids which comprise some 80 of the largest family of monocots We will use these data to 1 evaluate the potential importance of reticulate evolution at the tribal and subtribal level in epidendroids 2 test recent phylogenetic hypotheses based on 2 8 plastid genes and morphology and 3 establish a timeline for divergence of tribes within the subfamily An analysis of support for individual nodes in the tree as a function of the number of genes introns spacers and bases included will be used to assess minimum requirements for a well resolved phylogeny of the epidendroids Log in to add this item to your schedule 1 University of Wisconsin Botany 430 Lincoln Dr Madison WI 53706 USA 2 University of Wisconsin Madison Department of Botany 430 Lincoln Drive Birge Hall Madison WI 53706 USA 3 CSIRO Commonwealth Scientific and Industrial Research Organization Centre for Plant Biodiversity Research GPO Box 1600 Canberra ACT 2601 Australia 4 University of Florida Florida Museum of Natural History Gainesville Florida 32611 7800 USA 5 University of Missouri Columbia Biological Sciences 1201 Rollins Road Life Sciences Center 311 Columbia Missouri 65211 USA 6 University of Missouri Columbia Biological Sciences 311 Life Sciences Center 1201 Rollins St Columbia MO 65211 USA 7 University of Georgia Department of Plant Biology 4504 Miller Plant Sciences Athens GA 30602 USA 8 University of Wisconsin Madison Department

    Original URL path: http://2009.botanyconference.org/engine/search/index.php?func=detail&aid=692 (2016-02-01)
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