Document Detail


UV-B radiation and acclimation in timberline plants.
MedLine Citation:
PMID:  16005753     Owner:  NLM     Status:  MEDLINE    
Abstract/OtherAbstract:
Research has shown that some plants respond to enhanced UV-B radiation by producing smaller and thicker leaves, by increasing the thickness of epidermis and concentration of UV-B absorbing compounds of their surface layers and activation of the antioxidant defence system. The response of high-altitude plants to UV-B radiation in controlled conditions is often less pronounced compared to low-altitude plants, which shows that the alpine timberline plants are adapted to UV-B. These plants may have a simultaneous co-tolerance for several stress factors: acclimation or adaptation to the harsh climate can also increase tolerance to UV-B radiation, and vice versa. On the other hand, alpine timberline plants of northern latitudes may be less protected against increasing UV-B radiation than plants from more southern latitudes and higher elevations due to harsh conditions and weaker preadaptation resulting from lower UV-B radiation exposure. It is evident that more long-term experimental field research is needed in order to study the interaction of climate, soil and UV-B irradiance on the timberline plants.
Authors:
Minna Turunen; Kirsi Latola
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Publication Detail:
Type:  Journal Article; Research Support, Non-U.S. Gov't; Review    
Journal Detail:
Title:  Environmental pollution (Barking, Essex : 1987)     Volume:  137     ISSN:  0269-7491     ISO Abbreviation:  Environ. Pollut.     Publication Date:  2005 Oct 
Date Detail:
Created Date:  2005-07-11     Completed Date:  2005-12-22     Revised Date:  2008-11-21    
Medline Journal Info:
Nlm Unique ID:  8804476     Medline TA:  Environ Pollut     Country:  England    
Other Details:
Languages:  eng     Pagination:  390-403     Citation Subset:  IM    
Affiliation:
Arctic Centre, University of Lapland, PO Box 122, FI-96101 Rovaniemi, Finland. minna.turunen@ulapland.fi
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MeSH Terms
Descriptor/Qualifier:
Acclimatization / physiology*
Altitude
Climate
Ecology / methods*
Finland
Oxidative Stress
Plant Physiological Phenomena / radiation effects*
Trees / radiation effects
Ultraviolet Rays / adverse effects*

From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine


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