Pollenatlas

Dieser POLLENATLAS enthält derzeit bereits über 90 verschiedene Pollentafeln mit Bildern und Beschreibungen der Pollen, die öfters in Luftproben anzutreffen sind.

Autorenschaft: Der Pollenatlas wurde von Edith Bucher und Veronika Kofler (Biologisches Labor der Landesagentur für Umwelt, Bozen) erstellt, ausgearbeitet und zur Verfügung gestellt.

  • Larix decidua

    pollen in optical section (1)
    pollen in optical section (1)
    pollen in optical section (2)
    pollen in optical section (2)
    pollen in optical section (3)
    pollen in optical section (3)
    exine sculpture
    exine sculpture

    species: Larix decidua (European Larch)
    plant family: Pinaceae
    at aerobiological analyses usually achieved determination level: Larix, Pinaceae

    photos: Landesagentur für Umwelt, Bozen (Italy)

    description:
    outline:
    in general globular, sometimes slightly elliptical
    size: polar axis: 79.3 (73.2-88.0) µm
    apertures: inaperturate
    pollen wall: Exine about 1-2 µm thick, psilate. Eye-catching thick intine, (5-7 µm), in the main the ratio between intine and exine is 8:1.
    additional attribute: granular plasma with many large, 3-10 µm long leucoplasts.
    note: similar pollen: in regard to the size and intine-exine ratio – none.

    remarks to the plant:
    European Larch is a deciduous coniferous tree, frequently found in Alpine regions, preferably at timber line. Forming contiguous woods in the subalpine level, it is also planted in lower elevations because of its rapid growth and attractive timber. Needles (leaves) arise at 20-40 from short shoots and singular from long shoots. Flowering time is - depending on temperature consumption – April/May. Male inflorescences appear as greenish-yellow globular or cylindrical catkins, females (on the same shoot) attract attention by their dark red colour.

  • Laurus nobilis

    pollen in optcal section (1)
    pollen in optcal section (1)
    exine sculpture (1)
    exine sculpture (1)
    pollen in optical section (2)
    pollen in optical section (2)
    exine sculpture (2)
    exine sculpture (2)

    species: Laurus nobilis (Sweet Bay, Laurel)
    plant family: Lauraceae
    at aerobiological analyses usually achieved determination level: (Laurus), Lauraceae

    photos: Landesagentur für Umwelt, Bozen (Italy)

    description:
    outline:
    circular
    size: 38.7 (36-41) µm
    apertures: inaperturate pollen
    pollen wall: compared to the pollen size, the echinate exine is very thin, cast by tiny (up to 1x1 µm) conical spines which appear in some distance from each other. Intine is about 3-4 µm of constant thickness, glassy.
    additional remarks: fine granular plasma
    note: we observe similar pollen in Cinnamomum (Camphor tree) and Umbellularia (California Bay)

    remarks to the plant:
    The most noble representative of the laurel family is a pyramid-shaped dioeceous tree or large shrub with evergreen, aromatic leaves. It grows spontaneous at rocky and scrubby stands in the Mediterranean, preferably in damp mountain forests near the coast and in accompany with the Mediterranean macchia. The spicy leaves are elliptic, rather thick and leathery. Clusters of small yellowish-white, unisexual flowers are produced in springtime (March/April).

  • Ligustrum vulgare

    pollen in optical section (1)
    pollen in optical section (1)
    exine sculpture and apertures (1)
    exine sculpture and apertures (1)
    pollen in optical section (2) - polar view
    pollen in optical section (2) - polar view
    exine sculpture and apertures (2)
    exine sculpture and apertures (2)

    species: Ligustrum vulgare (Wild Privet)
    plant family: Oleaceae
    at aerobiological analyses usually achieved determination level: Ligustrum, (Oleaceae)

    photos: Landesagentur für Umwelt, Bozen (Italy)

    description:
    outline:
    circular to rounded triangular in polar view, circulate-ovate in equatorial view
    size: polar axis: 28.8 (27-30) µm, equatorial axis 32.0 (30-34) µm
    apertures: tricolporate pollen with looming pori
    pollen wall: exine thick, reticulate. Muri of the mesh appear dotted in lines (like a cord of pearls) in top view. The width of the meshwork and thickness of the exine lessens towards the colpi, intine forms often onci.
    remark: similar pollen in Syringa (lilac)

    remarks to the plant:
    Wild privet is of European- West Asian origin. It grows often on calcareous soils in bright forests, along wood-borders and scrub. Frequently it is cultivated for hedges. The thin leaves are opposite, untoothed, lanceolate. Fragrant, creamy-white flowers are produced in dense pyramidal clusters from May to July. The globose fruit is shiny black when ripe.

  • Liquidambar styraciflua

    pollen in optical section (1)
    pollen in optical section (1)
    exine sculpture, apertures (1)
    exine sculpture, apertures (1)
    pollen in optical section (2)
    pollen in optical section (2)
    exine sculpture, apertures (2)
    exine sculpture, apertures (2)

    species: Liquidambar styraciflua
    plant family: Hamamelidaceae
    at aerobiological analyses usually achieved determination level: Liquidambar

    photos: Landesagentur für Umwelt, Bozen (Italy)

    description:
    outline:
    circular
    size: 34,8 (29,7-39,6) µm
    apertures: periporate pollen grain with mostly 14-20 wide, circular or elliptical pori approx. 6-10 µm in diameter. Membrane over the pori covered with numerous granules.
    pollen wall: thin, micro-reticulate exine, lumina and muri of approx. the same width. Thin, protruding intine.
    note: similar pollen: Alisma
    The microreticulum usually becomes visible not below 1000x magnification under light microscope.

    remarks to the plant:
    Sweetgum originates from the Atlantic regions of North America and is popular as an ornamental tree because of its gorgeous autumn foliage. The shiny green leaves are palmated. Flowers are inconspicuous, either male or female, and arranged in globular inflorescences, appearing in April.
    The wooden parts of the tree contain a resin (styrax) that is used as a drug against cough and common cold. Its also used as flavouring agent in the foodstuff industry.

  • Luzula lutea

    pollen tetrad in optical section (1)
    pollen tetrad in optical section (1)
    pollen tetrad - exine sculpture (1)
    pollen tetrad - exine sculpture (1)
    pollen tetrad in optical section (2)
    pollen tetrad in optical section (2)
    pollen tetrad - exine sculpture (2)
    pollen tetrad - exine sculpture (2)

    species: Luzula lutea (Yellow Wood-rush)
    plant family: Juncaceae
    at aerobiological analyses usually achieved determination level: Juncaceae

    photos: Landesagentur für Umwelt, Bozen (Italy)

    description:
    outline:
    depending on the position of the monads of the tetrade, triangular or quadrangular
    size: 46.6 (43-52) µm
    apertures: monoporate monads
    pollen wall: very thin, scabrate exine, each monad with a coarse-grained, blurred, circular distal germination area where the exine easily braks. Clearly defined intine, thickened in particular underneath the distal parts of the monads.
    remark: similar pollen in Juncus (rush)

    remarks to the plant:
    Yellow Wood-rush colonises acidic grasslands in sub-alpine and alpine strata. These perennial weeds reveal a grass-like habit. The long, slim leaves are either grass-like flat, bristly, or tubular. Its small, inconspicuous bisexual flowers are wind-pollinated and appear throughout the summer.

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