Effects of reducing the ambient UV-B radiation in the high Arctic on Salix arctica and Vaccinium uliginosum
Effects of reducing the ambient UV-B radiation on gas exchange and chlorophyll fluores-cence of two dwarf shrub species, Salix arctica and Vaccinium uliginosum, was studied in a high arctic heath in North East Greenland during two growing seasons. Films (Mylar, transmitting λ > 320 nm, and Lexan,...
Main Authors: | , , , , |
---|---|
Format: | Article in Journal/Newspaper |
Language: | English |
Published: |
2005
|
Subjects: | |
Online Access: | https://orbit.dtu.dk/en/publications/3c61e2b8-ad5f-41ff-9e9e-1d392b4017bb https://backend.orbit.dtu.dk/ws/files/4005518/paper_Albert2005_phyton.pdf |
id |
ftdtupubl:oai:pure.atira.dk:publications/3c61e2b8-ad5f-41ff-9e9e-1d392b4017bb |
---|---|
record_format |
openpolar |
spelling |
ftdtupubl:oai:pure.atira.dk:publications/3c61e2b8-ad5f-41ff-9e9e-1d392b4017bb 2023-05-15T14:25:08+02:00 Effects of reducing the ambient UV-B radiation in the high Arctic on Salix arctica and Vaccinium uliginosum Albert, K.R. Ro-Poulsen, H. Mikkelsen, Teis Nørgaard Bredahl, L. Haakansson, K.B. 2005 application/pdf https://orbit.dtu.dk/en/publications/3c61e2b8-ad5f-41ff-9e9e-1d392b4017bb https://backend.orbit.dtu.dk/ws/files/4005518/paper_Albert2005_phyton.pdf eng eng info:eu-repo/semantics/openAccess Albert , K R , Ro-Poulsen , H , Mikkelsen , T N , Bredahl , L & Haakansson , K B 2005 , ' Effects of reducing the ambient UV-B radiation in the high Arctic on Salix arctica and Vaccinium uliginosum ' , Phyton. Annales Rei Botanicae , vol. 45 , no. 4 , pp. 41-49 . 9-B risiko /dk/atira/pure/sustainabledevelopmentgoals/good_health_and_well_being SDG 3 - Good Health and Well-being article 2005 ftdtupubl 2023-01-11T23:57:18Z Effects of reducing the ambient UV-B radiation on gas exchange and chlorophyll fluores-cence of two dwarf shrub species, Salix arctica and Vaccinium uliginosum, was studied in a high arctic heath in North East Greenland during two growing seasons. Films (Mylar, transmitting λ > 320 nm, and Lexan, transmitting λ > 400 nm) were used to reduce UV-B radiation and UV-B+A respectively. A UV transparent film (Teflon, transmitting λ > 280 nm) and no film were used as controls. Field measurements showed that the plants under Teflon, Mylar and Lexan received app. 91%, 39% and 17% of the ambient UV-B irradiance, respectively. UV radiation decreased the maximal photochemical efficiency (Fv/Fm) and other fast fluorescence transient derived parameters in both species, despite an increased level of leaf flavonoid content. The responses varied in signifi-cance according to species and site. The relation of these effects to a significantly decreased stomatal conductance (gs) and intercellular CO2 concentration (Ci) pointed to respiration as an im-portant factor in the interpretation of the observed unaffected net CO2 assimilation (Pn) in UV- re-duced treatments. It is concluded that the studied species have not fully acclimatized to the level of ambient UV-B radiation, and that ambient UV-B level is an important stress factor for the investi-gated plants in High Arctic. Article in Journal/Newspaper Arctic Arctic East Greenland Greenland Technical University of Denmark: DTU Orbit Arctic Greenland |
institution |
Open Polar |
collection |
Technical University of Denmark: DTU Orbit |
op_collection_id |
ftdtupubl |
language |
English |
topic |
9-B risiko /dk/atira/pure/sustainabledevelopmentgoals/good_health_and_well_being SDG 3 - Good Health and Well-being |
spellingShingle |
9-B risiko /dk/atira/pure/sustainabledevelopmentgoals/good_health_and_well_being SDG 3 - Good Health and Well-being Albert, K.R. Ro-Poulsen, H. Mikkelsen, Teis Nørgaard Bredahl, L. Haakansson, K.B. Effects of reducing the ambient UV-B radiation in the high Arctic on Salix arctica and Vaccinium uliginosum |
topic_facet |
9-B risiko /dk/atira/pure/sustainabledevelopmentgoals/good_health_and_well_being SDG 3 - Good Health and Well-being |
description |
Effects of reducing the ambient UV-B radiation on gas exchange and chlorophyll fluores-cence of two dwarf shrub species, Salix arctica and Vaccinium uliginosum, was studied in a high arctic heath in North East Greenland during two growing seasons. Films (Mylar, transmitting λ > 320 nm, and Lexan, transmitting λ > 400 nm) were used to reduce UV-B radiation and UV-B+A respectively. A UV transparent film (Teflon, transmitting λ > 280 nm) and no film were used as controls. Field measurements showed that the plants under Teflon, Mylar and Lexan received app. 91%, 39% and 17% of the ambient UV-B irradiance, respectively. UV radiation decreased the maximal photochemical efficiency (Fv/Fm) and other fast fluorescence transient derived parameters in both species, despite an increased level of leaf flavonoid content. The responses varied in signifi-cance according to species and site. The relation of these effects to a significantly decreased stomatal conductance (gs) and intercellular CO2 concentration (Ci) pointed to respiration as an im-portant factor in the interpretation of the observed unaffected net CO2 assimilation (Pn) in UV- re-duced treatments. It is concluded that the studied species have not fully acclimatized to the level of ambient UV-B radiation, and that ambient UV-B level is an important stress factor for the investi-gated plants in High Arctic. |
format |
Article in Journal/Newspaper |
author |
Albert, K.R. Ro-Poulsen, H. Mikkelsen, Teis Nørgaard Bredahl, L. Haakansson, K.B. |
author_facet |
Albert, K.R. Ro-Poulsen, H. Mikkelsen, Teis Nørgaard Bredahl, L. Haakansson, K.B. |
author_sort |
Albert, K.R. |
title |
Effects of reducing the ambient UV-B radiation in the high Arctic on Salix arctica and Vaccinium uliginosum |
title_short |
Effects of reducing the ambient UV-B radiation in the high Arctic on Salix arctica and Vaccinium uliginosum |
title_full |
Effects of reducing the ambient UV-B radiation in the high Arctic on Salix arctica and Vaccinium uliginosum |
title_fullStr |
Effects of reducing the ambient UV-B radiation in the high Arctic on Salix arctica and Vaccinium uliginosum |
title_full_unstemmed |
Effects of reducing the ambient UV-B radiation in the high Arctic on Salix arctica and Vaccinium uliginosum |
title_sort |
effects of reducing the ambient uv-b radiation in the high arctic on salix arctica and vaccinium uliginosum |
publishDate |
2005 |
url |
https://orbit.dtu.dk/en/publications/3c61e2b8-ad5f-41ff-9e9e-1d392b4017bb https://backend.orbit.dtu.dk/ws/files/4005518/paper_Albert2005_phyton.pdf |
geographic |
Arctic Greenland |
geographic_facet |
Arctic Greenland |
genre |
Arctic Arctic East Greenland Greenland |
genre_facet |
Arctic Arctic East Greenland Greenland |
op_source |
Albert , K R , Ro-Poulsen , H , Mikkelsen , T N , Bredahl , L & Haakansson , K B 2005 , ' Effects of reducing the ambient UV-B radiation in the high Arctic on Salix arctica and Vaccinium uliginosum ' , Phyton. Annales Rei Botanicae , vol. 45 , no. 4 , pp. 41-49 . |
op_rights |
info:eu-repo/semantics/openAccess |
_version_ |
1766297570703835136 |