archive-org.com » ORG » B » BOTANYCONFERENCE.ORG

Total: 933

Choose link from "Titles, links and description words view":

Or switch to "Titles and links view".
  • Botany & Mycology 2009 - Abstract Search
    Statement is null or not a SELECT 12 49 20 Abstract Detail Colloquium Assembling the Tree of Life Colloquium Qiu Yin Long 1 Li Libo 2 Xue Jiayu 3 Hendry Tory A 2 Wang Bin 1 Chen Zhiduan 4 An Angiosperm Phylogeny Inferred from Nucleotide Sequences of Four Mitochondrial Genes An angiosperm phylogeny is inferred from nucleotide sequences of four mitochondrial genes atp1 matR nad5 and rps3 using a maximum likelihood method as implemented in RAXML The results are largely congruent with those obtained from previous analyses of chloroplast and nuclear genes These results demonstrate that 1 mitochondrial genes are informative markers for angiosperm phylogeny reconstruction 2 the previously reconstructed angiosperm phylogeny based on markers from chloroplast and nuclear genomes are supported by evidence from the mitochondrial genome 3 some critical details such as the composition of the first diverging lineage of angiosperm phylogeny and placement of Ceratophyllum are different in the mitochondrial gene trees and 4 horizontal transfer of mitochondrial genes reported in earlier studies is not rampant despite its occasional occurrence Log in to add this item to your schedule 1 University of Michigan Department of Ecology Evolutionary Biology 830 North University Avenue Ann Arbor Michigan 48109 1048

    Original URL path: http://2009.botanyconference.org/engine/search/index.php?func=detail&aid=66 (2016-02-01)
    Open archived version from archive


  • Botany & Mycology 2009 - Abstract Search
    Marcela 1 Meira Renata M S A 2 Anatomical and histochemical characterization of extrafloral nectaries of Prockia crucis Salicaceae Besides being vital tools in taxonomic evaluation the anatomy of plant secretory structures and the chemical composition of their secretions may contribute to a more thorough understanding of the roles and functions of these secretory structures Here we used standard techniques for plant anatomy and histochemistry to examine secretory structures on leaves at different stages of development of Prockia crucis to evaluate the origin and development of the structures and to identify the disaccharides and monosaccharides in the exudates Fructose glucose and sucrose constituted up to 49 6 of the entire secretion then the glands were confirmed to be extrafloral nectaries EFNs This is the first report of their presence in the genus Prockia These EFNs are globular sessile glands with a central concavity occurring on the basal and marginal regions of the leaf The epidermis surrounding the concavity is secretory forming a single layered palisade that strongly reacts with periodic acid Schiff s reagent PAS and Xylidine Ponceau indicators of total polysaccharides and total proteins respectively in the exudate On the basis of the similarity of these glands to the

    Original URL path: http://2009.botanyconference.org/engine/search/index.php?func=detail&aid=182 (2016-02-01)
    Open archived version from archive

  • Botany & Mycology 2009 - Abstract Search
    or Search Botany Mycology 2009 Home Login Send Email Message From Name From Email To Renata M S A Meira Subject Message Please type in the 5 characters between 0 and 9 and between A and F shown above and

    Original URL path: http://2009.botanyconference.org/engine/search/index.php?func=contactbyemail&id=13947 (2016-02-01)
    Open archived version from archive

  • Botany & Mycology 2009 - Abstract Search
    database 12 49 34 Unable to connect to database 12 49 34 SQL Statement is null or not a SELECT 12 49 34 Abstract Detail Developmental and Structural Section Seago James 1 Anatomical Features of Some Selected Basal Angisoperms In spite of the attention being given to the basal angiosperms in recent publications and presentations relatively little emphasis has been placed on the subterranean and submersed portions of the aquatic moist soil or drained soil plants of these angiosperms especially the recently reclassified Trithuria Nymphaeales Hydatellaceae Amborella Amborellales Amborellaceae and Illicium Austrobaileyales Illiciaceae For example very small adventitious roots and stems of Trithuria have an endodermis with Casparian bands and suberin lamellae it also has a modified hypodermis with some cell wall modifications Its roots have a Cabomba like tiered RAM and it develops small cortical air spaces and vascular tissue with few elements the xylem cells in the stem are irregularly arranged Both Amborella and Illicium have adventitious roots or their laterals with a diarch vascular cylinder arrangement in small roots and a complex endodermis Casparian bands and suberin lamellae and an irregular hypodermis with modified cell walls but secondary tissues and a redivided endodermis are present in larger

    Original URL path: http://2009.botanyconference.org/engine/search/index.php?func=detail&aid=233 (2016-02-01)
    Open archived version from archive

  • Botany & Mycology 2009 - Abstract Search
    Steenbock Christopher M 1 Stockey Ruth A 2 Beard Graham 3 Tomescu Alexandru MF 1 Anatomically preserved fossil moss gametophytes from the Eocene of Vancouver Island British Columbia Canada Anatomically preserved gametophytes from the Eocene Appian Way fossil locality of Vancouver Island British Columbia Canada represent one of the very few occurrences of permineralized fossil mosses reported from North America More than a dozen specimens are preserved in marine carbonate nodules embedded in a micritic mud matrix Their anatomy and morphology are documented using the cellulose acetate peel technique Caulidia branch frequently but irregularly at 0 5 1 5 mm intervals and their diameters range 160 190 um Cells with the thickest walls are found in the outermost two to three cell layers Cell wall thickness decreases gradually toward the center of the caulidium where the central cells are often poorly preserved the absence of radial patterning consisting of well defined layers indicates an absence of specialized conducting tissues Phyllidia measuring about 1 2 mm in width exhibit dense helical taxis unistratose anatomy and conspicuous alar cells at the base They taper along the longitudinal axis coming to a point at the distal end A four to five cell wide band consisting of larger globose cells can be followed along most of the longitudinal axis of the phyllidia cell size and wall thickness decrease toward the margins Phyllidia are folded longitudinally with the folding more pronounced toward the tip These features are consistent with placement in the Bryidae The plant fossil assemblages preserved in the Vancouver Island Eocene marine nodules includes plant parts usually found together in forest litter angiosperm fruits seeds and flowers conifer cones and twigs monocot roots and moss gametophytes This association has been interpreted as representing ripped up patches of forest floor buried rapidly in coastal

    Original URL path: http://2009.botanyconference.org/engine/search/index.php?func=detail&aid=755 (2016-02-01)
    Open archived version from archive

  • Botany & Mycology 2009 - Abstract Search
    Login Unable to connect to database 12 49 42 Unable to connect to database 12 49 42 SQL Statement is null or not a SELECT 12 49 42 Abstract Detail Systematics Section Zander Richard H 1 Ancestor descendant relationships in systematics using virtual fossils Ancestor descendant relationships are being gradually eliminated in phylogenetic classifications by emphasis on sister group relationships through enforcement of strict holophyly This includes repositioning lumping and splitting of taxa Some of these taxa are good taxa and are evolutionarily unique and discordant elements when lumped with a paraphyletic taxon or they have essentially random diagnoses after splitting a multiple comparisons problem in statistics that do not corroborate the split Paraphyly and heterophyly phylogenetic nonmonophyly on molecular trees may imply deep shared ancestral links between extant taxa These links are virtual fossils diagnosable at the lowest rank that is inclusive of the exemplars Examples are given The now common and unfortunate excision of ancestor descendant relationships results in a special purpose classification largely of interest only to phylogeneticists because their methods can only generate sister group relationships Modifying classifications according to strict phylogenetic monophyly scrambles a potential source of ancestor descendant information Log in to add this

    Original URL path: http://2009.botanyconference.org/engine/search/index.php?func=detail&aid=126 (2016-02-01)
    Open archived version from archive

  • Botany & Mycology 2009 - Abstract Search
    L Solanaceae domestication Changes in key traits occurring during the processes of plant domestication have often been subjects of continuous debate Only in the case of genetic analysis or with extensive plant remains can we document specific sets of changes Historical details of the plant domestication process are rare and evidence of morphological change can be difficult to obtain especially for those vegetables that lack a substantial body of archaeological data Botanical records chronicled in the ancient literature of established ancient civilizations such as that of China are invaluable resources for the study and understanding of the process of plant domestication Here we use the considerable body of ancient Chinese literature to explore the domestication process that has occurred with the eggplant Solanum melongena an important vegetable in Old World Our analysis reveals that the process of domestication of the eggplant in China involved three principal aspects of fruit quality size shape and taste These traits were selected for actively and gradually fruit size changed from small to large taste changed from not palatable to what was termed at the time sweetish and that over time a wider varieties of fruit shapes were cultivated The results indicate that in addition

    Original URL path: http://2009.botanyconference.org/engine/search/index.php?func=detail&aid=88 (2016-02-01)
    Open archived version from archive

  • Botany & Mycology 2009 - Abstract Search
    Sawada was examined by isozyme analysis MDH MDHP and sequence analysis of the ITS regions and cox I The strains were obtained by baiting in natural ecosystems in America Europe and Turkey or isolated from diseased plants linked to the horticultural trade Two Mdh 2 alleles and two Mdhp 1 alleles were observed resulting in three electrophoretic types Sequence analysis of the ITS regions resulted in thirteen haplotypes grouping in two major and two minor clades Sequence analysis of cox I revealed eleven haplotypes grouping in essentially similar clades ET 1 and ET 2 have one Mdh 2 allele in common suggesting geneflow between these clades This was indeed confirmed by the presence of similar and nearly similar sequences in these ET s ET 2 and ET 3 share one Mdhp 1 allele suggesting also geneflow between these ET s This was also confirmed by the presence of similar sequences in these ET s In addition as a whole the P citricola clade was monophyletic in relation to the broad phylogeny of the genus Phytophthora The newly described species P multivora coincided with one of the major P citricola clades It is therefore doubtful whether this clade represents a distinct

    Original URL path: http://2009.botanyconference.org/engine/search/index.php?func=detail&aid=240 (2016-02-01)
    Open archived version from archive