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.

  • Ulmus minor

    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 and apertures (3)
    exine sculpture and apertures (3)

    species: Ulmus minor (Small-leaved Elm)
    plant family: Ulmaceae
    at aerobiological analyses usually achieved determination level: Ulmus, Ulmaceae

    photos: Landesagentur für Umwelt, Bozen (Italy)

    description:
    outline:     circular to elliptical
    size: polar axis: 24.9 (23-27) µm, equatorial axis (measured in polar view): 27.3 (25-29) x 29.0 (27-31) µm
    apertures: zonoporate pollen with variable number of pori (mainly 4 to 6).
    pollen wall: exine tectate and of intermediate thickness, with undulating outline (supra-reticulate or tectate – regulate). Slightly thickened around the pori. The thick intine (approx. 2 µm) forms germination zones (onci).
    additional attributes: granular cytoplasma

    remarks to the plant:
    Small-leaved Elm is a small deciduous, richly branched tree up to about 3 m high. Originally homed in the Mediterranean, it grows in milder climates in woods, shrubberies and other habitats. It is also found in riverside forests along the major European streams but endangered by elm disease. Leaves are oval, serrate and always asymmetric. Flowers are in small lateral clusters, bisexual and anemophilous. Flowering time is February to April, before leaf bud break. Each fruit is surrounded by a broad wing.

  • Urtica dioica

    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)
    pollen in optical section (2)
    pollen in optical section (3)
    pollen in optical section (3)

    species: Urtica dioica (Nettle)
    plant family: Urticaceae
    at aerobiological analyses usually achieved determination level: Urticaceae, Moraceae/Urticaceae group

    photos: Landesagentur für Umwelt, Bozen (Italy)

    description:
    outline:     circular
    size: polar axis: 12.6 (12-13) µm, equatorial axis: 13.6 (12-15) µm
    apertures: tri- or tetra- zonoporate pollen. Pori with small, hardly visible opercula.
    pollen wall: thin, psilate to scabrate exine. Thin intine, forms distinct germination areas (onci).
    additional attributes: fine granular cytoplasma
    remark: similar pollen: Parietaria, Broussonetia

    remarks to the plant:
    Common nettle grows on widespread and often abundant inmany habitats, especially on nutrient-rich soils. It is a perennial, dioeceous (hence the Latin name!), vigorous erect coarse herb with stinging hairs both on the stalk and the leaves. Its leaves are ovate-cordate and stalked. Flowers appear in long green narrow catkins from June to October and are wind pollinated.


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