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  • 1. Bergström, L. Gunnar W.
    et al.
    Bergquist, Sara
    Stenhagen, Gunnar
    Gahmberg, Carl G.
    Campos D. Maia, Arthur
    Nordenstam, BertilThe Indonesian government fears that demand for palm oil in Europe could falter
    Floral scent chemistry within the genus Linnaea (Caprifoliaceae)2018In: Nordic Journal of Botany, ISSN 0107-055X, E-ISSN 1756-1051, article id e01732Article in journal (Refereed)
    Abstract [en]

    ‘Beauty bush’ and ‘twin ower’ are common names attributed to two well-recognizable species belonging to the genus Linnaea (16 spp.) – L. amabilis and L. borealis – long admired by botanists and gardeners for their perfumed paired bell-shaped owers. In the present study, we investigated their oral scent compositions through gas chro- matography – mass spectrometry (GC-MS) analysis of dynamic headspace samples. Because the owers of L. borealis in wild populations are fragrant both during the day and in the evening, circadian variation of scent emission was also assessed for this species. In total, 26 chemical compounds comprise the oral scent bouquets of L. amabilis and L. borealis, identi ed as monoterpenes (14), benzenoids and phenyl- propanoids (5), aliphatics (3), sesquiterpenes (3) and irregular terpenes (1). Whereas monoterpenes, notably (-)-α- and β-pinene, dominated the scent of L. amabilis (over 82% relative abundance), benzene derivates: 1,4 dimethoxybenzene, anisalde- hyde, 2-phenylethanol, benzaldehyde and nicotinaldehyde were exclusive to anal- ysed headspace samples of L. borealis, accounting for 52% to 100% of their relative compositions, in three Swedish populations. A southwestern Finnish population was characterized by the four rst mentioned benzenoid compounds and large amounts of (-)-α- and β-pinenes plus two aliphatic substances. e scent compounds identi- ed for both species are ubiquitous and may serve as generalist attractants/stimulants for a broad assortment of anthophilous insects. e basic work on the ower scent of L. amabilis and L. borealis should inspire studies of their pollination biology, primarily the behaviour-guiding roles of the characteristic emitted volatiles. 

  • 2.
    Sundberg, Henrik
    et al.
    Systematic Biology, Dept of Organismal Biology, Evolutionary Biology Centre, Uppsala Univ. Uppsala Sweden.
    Kruys, Åsa
    Museum of Evolution, Uppsala Univ. Uppsala Sweden.
    Bergsten, Johannes
    Swedish Museum of Natural History, Department of Zoology.
    Ekman, Stefan
    Museum of Evolution, Uppsala Univ. Uppsala Sweden.
    Coreomyces (Laboulbeniales) in Sweden, with two new species2021In: Nordic Journal of Botany, ISSN 0107-055X, E-ISSN 1756-1051, Vol. 39, no 11, p. 1-12Article in journal (Refereed)
    Abstract [en]

    The genus Coreomyces (Laboulbeniaceae, Laboulbeniomycetes, Ascomycota) includes minute parasites on water boatmen (Corixidae, Hemiptera, Insecta). This taxonomic study is primarily based on freshly sampled corixids infected by Coreomyces from Sweden, although a few samples from Denmark and Turkey were also included. All records were verified using DNA sequence data from the internal transcribed spacer region and large subunit of the nuclear ribosomal DNA repeat region. We recognise four species, two of which are new to science: Coreomyces confusus H. Sundb. et al. sp. nov., C. corixae Thaxt., C. dextrorsus H. Sundb. et al. sp. nov. and C. macropus Thaxt. Coreomyces corixae is new to Denmark, Sweden and Turkey, while C. macropus is new to Denmark and Sweden. Coreomyces confusus is morphologically very similar to C. macropus and also occupies the same positions on the same host species, although it seems to be less common. Coreomyces dextrorsus resembles C. corixae morphologically but is usually considerably larger. It infects the same host species as C. corixae and also shares one of its positions on the host with C. corixae, although it is much more common in its species-specific position. All four species can inhabit two different yet distinct positions on the host. We observe that morphology is affected by the position on the host and that different species sharing the same position on the host tend to be difficult or impossible to separate on morphology only. We conclude that species circumscriptions in Coreomyces must be based on the integration of molecular and morphological data.

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  • 3. Tyler, Torbjörn
    et al.
    Karlsson, Thomas
    Swedish Museum of Natural History, Department of Botany.
    Milberg, Per
    Sahlin, Ulrika
    Sundberg, Sebastian
    Invasive plant species in the Swedish flora: developing criteria and definitions, and assessing the invasiveness of individual taxa2015In: Nordic Journal of Botany, ISSN 0107-055X, E-ISSN 1756-1051, Vol. 33, p. 300-317Article in journal (Refereed)
  • 4. Weerakoon, G.
    et al.
    Aptroot, A
    Wedin, Mats
    Swedish Museum of Natural History, Department of Botany.
    Ekman, Stefan
    Leightoniella zeylanensis belongs to the Pannariaceae2018In: Nordic Journal of Botany, ISSN 0107-055X, E-ISSN 1756-1051, article id e01880Article in journal (Refereed)
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