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Seasonal ultrastructural changes in the cambial zone of beech (Fagus sylvatica) grown at two different altitudes

Peter Prislan and Uwe Schmitt and Gerald Koch and Jožica Gričar and Katarina Čufar (2011) Seasonal ultrastructural changes in the cambial zone of beech (Fagus sylvatica) grown at two different altitudes. IAWA Journal, 32 (4). pp. 443-459. ISSN 0928-1541

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    Seasonal structural changes of cambial cells in mature beech (Fagus sylvatica L.) trees growing at elevations of 400 m a.s.l. (lowland) and 1200 m a.s.l. (mountains) are presented on the basis of light (LM) and electron microscopy (TEM). For LM, samples from trees were collected at weekly intervals and for TEM at two-month intervals from March till September, 2008. LM enabled us to follow the production of new xylem and phloem cells that lasted for 16.5 ± 3.7 weeks at the lowland site and for 10.7 ± 1.3 weeks in the mountains. TEM revealed differences in ultrastructure of cambial cells in the phases of dormancy, reactivation, activity and transition to dormancy. The seasonal patterns of ultrastructural changes in cambial cells were similar at both sites but their timing was different. TEM revealed changes in the fine structure of cambial cells, indicating their activation in spring and the earliest stages of cell divisions and development of new cell walls. When using LM, the onset of cambial activity could be observed one month later, compared with TEM. LM therefore enabled us to follow cambial productivity but not the activity and related cytoplasmic modifications during reactivation.

    Item Type: Article
    Keywords: Fagus sylvatica, cambium, seasonal changes, light microscopy, transmission electron microscopy.
    Link to COBISS: http://www.cobiss.si/scripts/cobiss?command=SEARCH&base=COBIB&select=ID=1975177
    Divisions: Biotechnical Faculty, Department of Wood Technology > Chair of wood science
    Item ID: 590
    Date Deposited: 23 Jul 2014 10:14
    Last Modified: 12 Feb 2015 14:11
    URI: http://eprints.gozdis.si/id/eprint/590

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