Sökning: "Palaeobotany"

Visar resultat 6 - 7 av 7 avhandlingar innehållade ordet Palaeobotany.

1. 6. Cretaceous palynofloras from southern Scandinavia

   Författare :Vivi Vajda; Berggrundsgeologi; []
   Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; Paleobotanik; phylogeny; Palaeobotany; Cingutriletes scanicus sp. nov; Palynology; palynofacies; paleovegetation; transgression; Early Cretaceous; Cenomanian; Turonian; Bornholm; Denmark; Sweden; Scania; fylogeni; palynologi; Geology; physical geography; Geologi; fysisk geografi;

   Sammanfattning : A palynological investigation of Cretaceous sequences from Höllviken 2, Svedala 1 and Norrevång 1 wells of Scania, Southern Sweden, and from the Arnager Greensand-Arnager Limestone transition on the island of Bornholm, Denmark, was conducted. Well preserved palynofloras were found in strata consisting of shaly mudstones, glauconitic sandstones (greensand) and limestone. LÄS MER

3. 7. Temporal variation and phytotoxicity of Batatasin-III produced by Empetrum hermaphroditum

   Författare :Anna Wallstedt; Biologiska institutionen; []
   Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; Palaeobotany; nitrogen uptake; photosynthesis; inhibition; temporal variation; chemical interference; boreal forest; Empetrum hermaphroditum; batatasin-III; phylogeny; palynology; Paleobotanik; fylogeni; palynologi; Biology; Biologi;

   Sammanfattning : In northern Sweden, the clonal dwarf shrub Empetrum hermaphroditum Hagerup exerts strong inhibitory effects on other plant species. These inhibitory effects may, at least in part, be attributed to the high production of the secondary metabolite, batatasin-III, which is released from leaves and transported to the soil by rain (throughfall) and snowmelt. LÄS MER