European Aspen

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European Aspen

 

(Populus tremula), a dioecious deciduous tree of the genus Populus of the family Salicaceae. The European aspen is up to 35 m tall and has a diameter of up to 1 m. It is a round-headed or broadly conical tree. The gray-green leaves are nearly orbicular or orbicular-rhomboidal; there are large, irregular notches along the edges. The petioles are very compressed, thus causing the leaf blades to sway even in a mild breeze. The flowers are in hanging cylindrical catkins, which measure 4–15 cm long. The fruit is a capsule. The flowers appear before the leaves. The tree grows rapidly and has a life-span of 80 to 100 years. It often dies from fungus disease.

The European aspen is distributed in northern Eurasia, where it is mixed in coniferous and broad-leaved forests. In the steppes it forms groves and is found on the slopes of ravines. The tree often grows at the site of burnt out forests and at logging sites. It is planted in parks and as protective plantings. The European aspen is especially decorative in the autumn, owing to the bright carmine or yellow color of its leaves. The soft, lightweight, yellowish white timber is used in the manufacture of matches and cellulose; it is also used to make crates and various small articles.

REFERENCE

Derev’ia i kustarniki SSSR, vol. 2. Moscow-Leningrad, 1951.

V. N. GLADKOVA

References in periodicals archive ?
Caption: Figure 3: Deciduous trees, bark stripped by bears to get the cambium in Sakhalin Island: (a) Populus tremula, (b) Salix caprea, and (c) Alnus hirsute.
Barring, "On the reproduction of aspen (Populus tremula L.) with emphasis on its suckering ability," Scandinavian Journal of Forest Research, vol.
The small fraction of these that have been dated range in age from 3900 to 8400 cal yr BR As a rule, the peat contains plant macrofossils easily identifiable as common understory forest species and tree species such as Picea abies (8450, 8380, and 8180 cal yr BP), Larix sibirica (7320 cal yr BP), Sorbus aucuparia (8640 cal yr BP), Alnus incana (8000 cal yr BP), and Populus tremula (8590 cal yr BP) (Kullman and Oberg, 2012; Appendix 1).
Study area: Trembling aspen (Populus tremula L.) is one of the most resistant to cold and economically broadleaved species covering considerable areas.
Plantas de Populus tremula x Populus alba foram transformadas com o gene crs1-1, conferindo resistencia ao herbicida clorosulfan (BRASILEIRO et al., 1992).
El numero de aislamientos encontrados con la tecnica de la camara humeda fue bastante superior al obtenido utilizando medio de cultivo (284 vs .90 aislamientos), como ya se observo en Populus tremula (Santamaria y Diez, 2005).
Elstner (1995) "A combination of Populus tremula, Solidago virgaurea and Fraxinus excelsior as an anti-inflammatory and antirheumatic drug: a short review".
Key words: A Ices alces, biodiversity, browsing, European aspen, moose, Populus tremula, regeneration
The five hardwoods selected for thermal conductivity measurements were poplar (Populus tremula), oriental beech (Fagus orientalis), silver wattle (Acacia dealbata), ash (Fraxinus excelsior), and oak (Quercus petreae).
Esses autores superexpressaram um gene isolado de Arabidopsis, o qual e essencial na via de biossintese da giberelina (GA), que codifica para a GA 20-oxidase, em plantas transgenicas do hibrido Populus tremula x P.