Sökning: "systematisk botanik"

Visar resultat 1 - 5 av 52 avhandlingar innehållade orden systematisk botanik.

  1. 1. Morphological and Molecular Phylogenetic Studies in Neotropical Gentianaceae

    Författare :Lena Struwe; Pamela S Soltis; Stockholms universitet; []
    Nyckelord :NATURAL SCIENCES; NATURVETENSKAP; NATURVETENSKAP; NATURAL SCIENCES; systematisk botanik; Systematic Botany;

    Sammanfattning : The Gentianaceae of the Neotropics are a diverse taxonomic group representing several evolutionary lineages. The phylogenetic relationships of neotropical gentians are discussed based on cladistic analyses of morphological, trnL intron, and ITS 1 sequence data. LÄS MER

  2. 2. Phylogeny and biogeography of Gunnera

    Författare :Livia Wanntorp; Lennart Andersson; Stockholms universitet; []
    Nyckelord :NATURAL SCIENCES; NATURVETENSKAP; NATURVETENSKAP; NATURAL SCIENCES; Växter; fylogeni; Tvåhjärtbladiga; Magnoliopsida; systematisk botanik; Systematic Botany;

    Sammanfattning : The angiosperm genus Gunnera consists of 30-40 species mainly distributed in Africa, New Zealand, Tasmania, South America, the Malay Archipelago and Hawaii. Because of its distribution in almost all parts of the Southern Hemisphere and to its 90 millions year's history on Earth, Gunnera is especially interesting for its biogeography. LÄS MER

  3. 3. Evolution of Lycopodiaceae (Lycopsida) : Relationships and Patterns of Diversification

    Författare :Niklas Wikström; Anders Tehler; Stockholms universitet; []
    Nyckelord :NATURAL SCIENCES; NATURVETENSKAP; NATURVETENSKAP; NATURAL SCIENCES; systematisk botanik; Systematic Botany;

    Sammanfattning : A series of phylogenetic analyses using nucleotide sequence data resolves many aspects of the relationships in a group of land plants that until now have received comparatively little attention, the homosporous lycopsids or Lycopodiaceae. Although the group has evolved as an isolated lineage ever since the Late Devonian (more than 470 Myr ago), little is known about how modern species diversity relate to this ancient history. LÄS MER

  4. 4. Desert Plants and Deserted Islands : Systematics and Ethnobotany in Caryophyllaceae

    Författare :Anneleen Kool; Mats Thulin; Gudrun Kadereit; Uppsala universitet; []
    Nyckelord :NATURAL SCIENCES; NATURVETENSKAP; NATURAL SCIENCES; NATURVETENSKAP; NATURAL SCIENCES; NATURVETENSKAP; BEAST; Corrigiola; DNA barcoding; Morocco; Pollichia; Polycarpon; Polycarpaea; RAxML; Sanctambrosia; Spergula; Spergularia; Sphaerocoma;

    Sammanfattning : Background. Caryophyllaceae is a large and cosmopolitic flowering plant family, however the systematics of many of its basal groups has been unclear, due to a lack of unambiguous morphology. Some members of Caryophyllaceae are used medicinally, e.g. LÄS MER

  5. 5. Evolutionary Studies in Asterids Emphasising Euasterids II

    Författare :Jesper Kårehed; Mats H. G. Gustafsson; Uppsala universitet; []
    Nyckelord :NATURAL SCIENCES; NATURVETENSKAP; NATURVETENSKAP; NATURAL SCIENCES; Organismic biology; Apiales; Aquifoliales; Asterales; asterids; Bayesian inference; Cardiopteridaceae; DNA sequence data; Icacinaceae; morphology; parsimony; Pennantiaceae; phylogeny; Stemonuraceae; Organismbiologi; Organism biology; Organismbiologi; systematisk botanik; Systematic Botany;

    Sammanfattning : This thesis deals with evolutionary relationships within the asterids, a group of plants comprising about one-third of all flowering plants.Two new families are recognised: Pennantiaceae and Stemonuraceae. The woody Pennantia from New Zealand and Australia is the sole genus of Pennantiaceae. LÄS MER