Document Detail


Influence of solar UV radiation on the nitrogen metabolism in needles of Scots pine (Pinus sylvestris L.).
MedLine Citation:
PMID:  18508165     Owner:  NLM     Status:  MEDLINE    
Abstract/OtherAbstract:
Needles of 20-year-old Scots pine (Pinus sylvestris L.) saplings were studied in an ultraviolet (UV) exclusion field experiment (from 2000 to 2002) in northern Finland (67 degrees N). The chambers held filters that excluded both UV-B and UV-A, excluded UV-B only, transmitted all UV (control), or lacked filters (ambient). UV-B/UV-A exclusion decreased nitrate reductase (NR) activity of 1-year-old needles of Scots pines compared to the controls. The proportion of free amino acids varied in the range 1.08-1.94% of total proteins, and was significantly higher in needles of saplings grown under UV-B/UV-A exclusion compared to the controls or UV-B exclusion. NR activity correlated with air temperature, indicating a "chamber effect". The study showed that both UV irradiance and increasing temperature are significant modulators of nitrogen (N) metabolism in Scots pine needles.
Authors:
Marek Krywult; Jerzy Smykla; Heli Kinnunen; Françoise Martz; Marja-Liisa Sutinen; Kaisa Lakkala; Minna Turunen
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Publication Detail:
Type:  Comparative Study; Journal Article; Research Support, Non-U.S. Gov't     Date:  2008-05-27
Journal Detail:
Title:  Environmental pollution (Barking, Essex : 1987)     Volume:  156     ISSN:  1873-6424     ISO Abbreviation:  Environ. Pollut.     Publication Date:  2008 Dec 
Date Detail:
Created Date:  2008-11-17     Completed Date:  2009-01-14     Revised Date:  -    
Medline Journal Info:
Nlm Unique ID:  8804476     Medline TA:  Environ Pollut     Country:  England    
Other Details:
Languages:  eng     Pagination:  1105-11     Citation Subset:  IM    
Affiliation:
Department of Instrumental Analysis, Provincial Sanitary-Epidemiological Station, State Sanitary Inspection, Pradnicka 76, PL-31-202 Kraków, Poland.
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MeSH Terms
Descriptor/Qualifier:
Air Pollutants / metabolism*
Ecology / methods
Finland
Nitrogen / metabolism*
Pinus sylvestris / metabolism*,  radiation effects
Plant Leaves / metabolism*,  radiation effects
Seasons
Seedling / metabolism,  radiation effects
Temperature
Ultraviolet Rays*
Chemical
Reg. No./Substance:
0/Air Pollutants; 7727-37-9/Nitrogen

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


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