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Träfflista för sökning "L773:0024 4074 OR L773:1095 8339 srt2:(2000-2004)"

Sökning: L773:0024 4074 OR L773:1095 8339 > (2000-2004)

  • Resultat 1-7 av 7
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1.
  • Knudsen, Jette, 1961-, et al. (författare)
  • Trends in floral scent chemistry in pollination syndromes : floral scent composition in hummingbird-pollinated taxa
  • 2004
  • Ingår i: Botanical journal of the Linnean Society. - London : Academic Press. - 0024-4074 .- 1095-8339. ; 146:2, s. 191-199
  • Tidskriftsartikel (refereegranskat)abstract
    • We studied an assemblage of 17 species of bird-pollinated Ecuadorian plants (from 14 angiosperm families), including taxa pollinated by short-billed (trochiline) and sickle-billed (hermit) hummingbirds. Hummingbirds are widely supposed to ignore fragrance while visiting flowers. We collected floral headspace odours in order to test the general prediction that specialist hummingbird-pollinated flowers are scentless. In nine out of 17 of these species we failed to detect any odours using gas chromatography-mass spectrometry (GC-MS), whereas the remaining eight species produced trace levels of volatile compounds. Most of these odour compounds were of terpenoid or lipoxygenase derivation and are commonly emitted by vegetative as well as floral plant tissues. Further studies will be required to determine whether these weak odours attract alternative pollinators, repel enemies or represent vestiges of a scented ancestry.
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2.
  • Kårehed, Jesper (författare)
  • The family Pennantiaceae and its relationships to Apiales
  • 2003
  • Ingår i: Botanical journal of the Linnean Society. - : Oxford University Press (OUP). - 0024-4074 .- 1095-8339. ; 141:1, s. 1-24
  • Tidskriftsartikel (refereegranskat)abstract
    • The early evolution of the flowering plant order Apiales is discussed based on information from morphology and DNAsequences from four genes (ndhF,rbcL,atpBandmatK). A model-based approach of analysis, Bayesian inference, isused to analyse the data and the results are compared with those from parsimony analysis. In particular, a new familyof the order, the monogeneric Pennantiaceae from New Zealand and Australia, aids in the understanding of howthe order originated. The ancestor of Apiales was probably a shrub or small tree with alternate, simple leaves, paniculateinflorescences, five-merous flowers with free petals, and drupes.
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  • Eklund, H (författare)
  • Lauraceous flowers from the Late Cretaceous of North Carolina, USA
  • 2000
  • Ingår i: BOTANICAL JOURNAL OF THE LINNEAN SOCIETY. - : ACADEMIC PRESS LTD. - 0024-4074. ; 132:4, s. 397-428
  • Tidskriftsartikel (refereegranskat)abstract
    • Three new taxa with clear affinity to errant Lauraceae are described from the Santonian/ Campanian (c.83 Myr, Late Cretaceous) Neuse River locality in Nor th Carolina, U.S.A A new lauraceous genus, Neusenia, is established to accommodate an excellently pr
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  • Resultat 1-7 av 7

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