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  • Botany & Mycology 2009 - Abstract Search
    12 50 37 Abstract Detail BSA Past President s Symposium Computational Issues and Solutions for the Study of Plant Phylogeny Warnow Tandy 1 Linder Randal 2 A new method for simultaneous estimation of alignments and phylogenies on large difficult to align datasets Molecular sequences evolve under processes that include substitutions insertions and deletions jointly called indels as well as other mechanisms e g duplications and rearrangements The inference of the evolutionary history of these sequences has usually been performed in two stages first an alignment is estimated on the sequences and then a tree is estimated given that alignment While such methods often work well on relatively small datasets they can produce highly incorrect trees and alignments when applied to large datasets or ones which evolve rapidly and or with many indels In this talk we will present a new method that we have been developing that uses maximum likelihood to estimate the alignment and tree at the same time and that can be used to analyze datasets with up to 1000 sequences on a desktop computer in 24 hours Our studies using both real and simulated data show that this method produces much more accurate trees and alignments than

    Original URL path: http://2009.botanyconference.org/engine/search/index.php?func=detail&aid=1036 (2016-02-01)
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  • Botany & Mycology 2009 - Abstract Search
    from the Appian Way Eocene British Columbia Canada The Appian Way locality on Vancouver Island British Columbia has yielded several cupressaceous fossil remains such as shoots pollen cones and ovulate cones This paper describes one of two ovulate cones found at Appian Way The permineralized fossil cone comes from an Eocene calcareous concretion and was studied using the cellulose acetate peel technique The cone is 1 2 1 6 cm long 0 8 1 2 cm wide terminal solitary ovoid with up to 16 decussately arranged cone scale complexes Each cone scale complex is composed of an epidermis ground tissue one row of adaxial vascular bundles and one row of abaxial resin canals A thick cuticle covers rectangular epidermal cells The ground tissue is made up of both parenchymatous and sclerenchymatous cells Vascular bundles range from 9 to 17 and are represented by secondary xylem Resin canals range from 5 to 12 and have an epithelial lining Individual cone scale complexes bear up to four adaxial seeds Seeds are small ovoid and winged The cone is borne terminally on a shoot with decussately arranged leaves The shoot is 2 cm long and 0 7 cm wide with endarch primary xylem a parenchymatous pith pycnoxylic wood uniseriate rays and a small amount of periderm Leaves are 1 0 mm long 0 3 mm wide needle like to falcate with an epidermis mesophyll one resin canal and a single vascular bundle Characters such as cone and cone scale shape and size and phyllotaxy combined with falcate leaves of the attached shoot resemble those of Cupressaceae Subfamily Sequoioideae The cone contrasts with previously described species by having decussate cone scales few adaxial vascular bundles numerous abaxial resin canals four adaxial seeds and falcate subtending leaves This cone with attached leaves expands our knowledge

    Original URL path: http://2009.botanyconference.org/engine/search/index.php?func=detail&aid=698 (2016-02-01)
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  • Botany & Mycology 2009 - Abstract Search
    Mendocino County California U S A A coal bearing sequence exposed along the Middle Fork Eel River MFER near Covelo in California s northern Coast Ranges provides new paleofloristic data for this once coastal region of California and corroborates the unit s Miocene age Clark in 1940 was the first to place the coal bearing beds in their regional geologic context and assign them to the Miocene This determination relied primarily on a Desmostylus molar found in shale overlying the coal and associated equivocal though Miocene compatible marine mollusks The MFER coal bearing beds are often referred to the Temblor Formation however this assignment goes against modern day stratigraphic protocols and therefore we use the informal name Sand Bank beds SBb here in referring to this unit Stratigraphy and sedimentology of the SBb show it represents a fluvial floodplain deltaic mire estuarine marine sequence The fluvial system originated from an upland region to the north and flowed south where it fed a near coastal swampy forested bottomland mire Initial analysis of plant fossils from the shale and mudstones associated with the main MFER coal outcrop shows swamp cypress Taxodium like trees were among the dominants as represented by compressed foliage from shale overlying the coal Taxodioxylon wood from the coal and abundant taxodiaceous pollen from the underclay beneath the coal The underclay palynomorph assemblage also includes lycophytes abundant ferns similar to Polypodiaceae Gleicheniaceae cf Osmundaceae and cf Schizaeaceae conifers with affinities to Pinaceae e g Pinus Picea Pseudotsuga Larix Abies Cupressaceae and Podocarpaceae and other herbaceous and woody angiosperms e g Asteraceae Chenopodiaceae Amaranthaceae Graminae Sparganiaceae Typhaceae Betulaceae Cornaceae Ericaceae Fagaceae Ilex Juglandaceae Carya Juglans Pterocarya Cyclocarya Leguminosae Hamamelidaceae Liquidambar Onagraceae Rhamnaceae Salicaceae Tiliaceae and Ulmaceae The SBb palynoflora shares a high floristic correspondence with the assemblages from the early

    Original URL path: http://2009.botanyconference.org/engine/search/index.php?func=detail&aid=777 (2016-02-01)
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  • Botany & Mycology 2009 - Abstract Search
    Program Schedule Programs At A Glance Detailed Programs Custom Schedule Sessions Date Time Locations or Search Botany Mycology 2009 Home Login Unable to connect to database 12 50 51 Unable to connect to database 12 50 51 SQL Statement is null or not a SELECT 12 50 51 Abstract Detail MSA Systematics Evolution Urbina H 1 Iturriaga T 1 Mardones M 1 A new species of the genus Pseudoplectania Sarcosomataceae Pezizales from Venezuela A new species of the genus Pseudoplectania Sarcosomataceae Pezizales was collected on wood in a tropical rainforest located in Luepa Canaima National Park Gran Sabana Bolívar State Venezuela Species of the genus Pseudoplectania are characterized by having a deep cup shaped sessile or stipitate apothecia covered by coiled or twisted hairs J ascus containing 8 globose smooth hyaline ascospores The new species can be distinguished from the rest of the species in the genus by having brown apothecia and ornamented ascospores Currently nine species are recognized in the genus Pseudoplectania but just two P melaena Fr Sacc y P nigrella Pers Fuckel have brown to black apothecia Ornamented ascospores have not been previously described in the genus Log in to add this item to your schedule 1

    Original URL path: http://2009.botanyconference.org/engine/search/index.php?func=detail&aid=869 (2016-02-01)
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  • Botany & Mycology 2009 - Abstract Search
    K 1 Pawar Snehal 2 Kale Pinaz 2 Remington David L 3 Sadri Fereidoon 2 A New Type of Visual Key Based on Bayesian Principles Keys are character based tools for organismal identification Keys to plant species are based on the decomposition of the plant into atomistic parts which are described with the technical and often arcane terminology of plant taxonomy Even the best electronic keys Lucid make use of this terminology Keys are not based on pattern recognition the forte of visual experts Instead they demand that the user look at the plant as if it consisted of a series of isolated parts that are classified by name Keys would be more effective if they were visually based They would be easier to use for visual experts because accurate perception is their province They would also be easier to use for novices because they would not depend on knowledge of arcane terminology This paper presents a new method of constructing Bayesian visual keys and illustrates this method with a prototype key to the Fagaceae of the Southeastern US Log in to add this item to your schedule Related Links Prototype Bayesian Viaual Key to the Fagaceae of the Souteast

    Original URL path: http://2009.botanyconference.org/engine/search/index.php?func=detail&aid=68 (2016-02-01)
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  • Botany & Mycology 2009 - Abstract Search
    Abstract Detail Ecological Section Brower MB 1 Tuberty SR 1 Sakamachi Y 1 Colgan MJ 1 An Exploration of Chicken Litter Induced Trace Metal Phytotoxicity in Plants The overall goal of this study is to assess the adverse impacts of phytotoxic trace metals from long term chicken litter application to corn and fescue Confined animal feeding operations are having a potentially huge economic and environmental impact on local communities The focus of this study will be the phytotoxic effects of these metals copper zinc arsenic manganese This project will address the inherent complexities of balancing management of sustainable rural economic growth and conservation of important natural resources such as fertile bottomland farming soils for generations to come I propose two main hypotheses H 1 crop plants exposed to supplemented levels representative of 40 80 years into the future of metals will exhibit acute and chronic phytotoxic biomarkers of exposure H 2 with continued application of trace metals to farm soils productivity will be unsustainable in the near future I will determine the current concentrations of trace metals in the soils of fields amended long term 20 30 years with chicken litter Next I will prepare soil on a local farmland which will be planted with corn and fescue Observations will be made and recorded throughout the life cycle of the plants Both acute and chronic assessment techniques will be utilized Briefly these measurements include the following endpoints percent seedling germination percent seedling emergence root shoot length biomass and leaf condition The bioaccumulation of metals in crop plant tissues will then be quantified If my hypotheses are borne out this research will determine the adverse effects of the spreading of chicken litter on agricultural communities This extensive interdisciplinary study will serve as a model to other Atlantic coast and Southeastern counties

    Original URL path: http://2009.botanyconference.org/engine/search/index.php?func=detail&aid=90 (2016-02-01)
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  • Botany & Mycology 2009 - Abstract Search
    secondary forest products for the local economy occur in Cuscuco National Park Honduras A secondary objective was to initiate a long term biodiversity survey of fungi in the park The forest is dominated by Pinus oocarpa Schiede ex Schtdl with Liquidambar styraciflua L in one of the southern most native pine stands in the world Fruiting bodies were collected and morphologically identified in late June 2008 on various trails around the Base Camp 1590 meters near the village of Buenos Aires Dried specimens were returned to Syracuse NY where they were further identified using molecular techniques DNA extraction PCR RFLP direct sequencing of the nrDNA ITS region and BLAST search in GenBank Of the 31 specimens collected 25 yielded high quality sequences Fourteen were identified to species 9 to genus and two to order Multiple collections were included of two Suillus spp a Russula and a species in Boletales Two species are believed to be edible Boletus pinophilus in the porcini group and Auricularia or tree ears In addition discussions with local residents with picture keys as a guide suggest the women are harvesting a Cantherellus sp or chanterelles local name choras and a Pleurotus sp or oyster mushroom for

    Original URL path: http://2009.botanyconference.org/engine/search/index.php?func=detail&aid=602 (2016-02-01)
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  • Botany & Mycology 2009 - Abstract Search
    T 1 Sommers Saunders James 1 Adams Rogan 1 Bruederle Leo 2 Annual Variation for Effective Pollination in Pentemon degeneri Crosswhite Plataginaceae a Rare Colorado Endemic Field research addressing pollination biology in Penstemon degeneri Crosswhite Plantaginaceae a rare Colorado endemic was conducted at three sites over two field seasons characterized by extreme variation for precipitation Although overall species diversity was similar each year the visitor guild differed dramatically over this period as did effective pollination Two bumblebee species Apidae were determined to be highly effective pollinators in 2007 yet few bumblebees were observed in 2008 and these carried little body pollen and no scopal pollen Mason bees Megachilidae were also determined to be effective pollinators in 2007 yet they occurred in relatively low numbers in 2007 and only at the high elevation site Mason bees were most abundant at all three sites in 2008 and were 80 faithful to P degeneri pollen carrying copious amounts of body pollen Pseudomasaris vespoides a pollen wasp that has been described as being oligolectic for Penstemon was encountered infrequently in 2007 yet it was one of the most frequent visitors in 2008 Furthermore nine of the ten individuals captured in 2008 carried copious amounts

    Original URL path: http://2009.botanyconference.org/engine/search/index.php?func=detail&aid=354 (2016-02-01)
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