Effects of ultraviolet‐B radiation on leaf elongation, production and phenylpropanoid concentrations of Deschampsia antarctica and Colobanthus quitensis in Antarctica
Stratospheric ozone depletion by anthropogenic chlorofluorocarbons has lead to increases in ultraviolet‐B radiation (UV‐B; 280–320 nm) along the Antarctic Peninsula during the austral spring. We manipulated UV‐B levels around plants of Antarctic hair grass ( Deschampsia antarctica; Poaceae) and Anta...
Published in: | Physiologia Plantarum |
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crwiley:10.1034/j.1399-3054.2000.100304.x 2024-09-15T17:45:23+00:00 Effects of ultraviolet‐B radiation on leaf elongation, production and phenylpropanoid concentrations of Deschampsia antarctica and Colobanthus quitensis in Antarctica Ruhland, Christopher T. Day, Thomas A. 2000 http://dx.doi.org/10.1034/j.1399-3054.2000.100304.x https://api.wiley.com/onlinelibrary/tdm/v1/articles/10.1034%2Fj.1399-3054.2000.100304.x https://onlinelibrary.wiley.com/doi/pdf/10.1034/j.1399-3054.2000.100304.x en eng Wiley http://onlinelibrary.wiley.com/termsAndConditions#vor Physiologia Plantarum volume 109, issue 3, page 244-251 ISSN 0031-9317 1399-3054 journal-article 2000 crwiley https://doi.org/10.1034/j.1399-3054.2000.100304.x 2024-08-30T04:12:19Z Stratospheric ozone depletion by anthropogenic chlorofluorocarbons has lead to increases in ultraviolet‐B radiation (UV‐B; 280–320 nm) along the Antarctic Peninsula during the austral spring. We manipulated UV‐B levels around plants of Antarctic hair grass ( Deschampsia antarctica; Poaceae) and Antarctic pearlwort ( Colobanthus quitensis; Caryophyllaceae) for one field season near Palmer Station along the west coast of the Antarctic Peninsula. Treatments involved placing frames over naturally growing plants that either (1) held filters that absorbed most biologically effective radiation (UV‐B BE ‘reduced UV‐B’, 22% of ambient UV‐B BE levels), (2) held filters that transmitted most UV‐B BE (‘near‐ambient UV‐B’, 87% of ambient UV‐B BE levels), or (3) lacked filters (‘ambient UV‐B’). Leaves on D. antarctica exposed to near‐ambient and ambient UV‐B were 16–17% shorter than those exposed to reduced UV‐B, and this was associated with shorter epidermal cells at the leaf base and tip. Leaves on C. quitensis exposed to near‐ambient and ambient UV‐B tended to be shorter ( P =0.18) and epidermal cells at the leaf base tended to be smaller than those under reduced UV‐B ( P <0.10). In order to further explain reductions in leaf length, we examined leaf concentrations of insoluble (cell‐wall bound) phenylpropanoids, since it has been proposed that wall‐bound phenylpropanoids such as ferulic acid may constrain cell expansion and leaf elongation. In both species, HPLC analysis revealed that ferulic and p ‐coumaric acid were major components of both insoluble and soluble phenylpropanoids. Although there were no significant differences in concentrations between UV‐B treatments, concentrations of insoluble ferulic acid in D. antarctica tended to be higher under ambient and near‐ambient UV‐B than under reduced UV‐B ( P =0.17). We also examined bulk‐leaf concentrations of soluble (methanol extractable) UV‐B‐absorbing compounds and found that concentrations were higher in plants exposed to near‐ambient and ambient UV‐B than in ... Article in Journal/Newspaper Antarc* Antarctic Antarctic Peninsula Antarctica Wiley Online Library Physiologia Plantarum 109 3 244 251 |
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Wiley Online Library |
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crwiley |
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English |
description |
Stratospheric ozone depletion by anthropogenic chlorofluorocarbons has lead to increases in ultraviolet‐B radiation (UV‐B; 280–320 nm) along the Antarctic Peninsula during the austral spring. We manipulated UV‐B levels around plants of Antarctic hair grass ( Deschampsia antarctica; Poaceae) and Antarctic pearlwort ( Colobanthus quitensis; Caryophyllaceae) for one field season near Palmer Station along the west coast of the Antarctic Peninsula. Treatments involved placing frames over naturally growing plants that either (1) held filters that absorbed most biologically effective radiation (UV‐B BE ‘reduced UV‐B’, 22% of ambient UV‐B BE levels), (2) held filters that transmitted most UV‐B BE (‘near‐ambient UV‐B’, 87% of ambient UV‐B BE levels), or (3) lacked filters (‘ambient UV‐B’). Leaves on D. antarctica exposed to near‐ambient and ambient UV‐B were 16–17% shorter than those exposed to reduced UV‐B, and this was associated with shorter epidermal cells at the leaf base and tip. Leaves on C. quitensis exposed to near‐ambient and ambient UV‐B tended to be shorter ( P =0.18) and epidermal cells at the leaf base tended to be smaller than those under reduced UV‐B ( P <0.10). In order to further explain reductions in leaf length, we examined leaf concentrations of insoluble (cell‐wall bound) phenylpropanoids, since it has been proposed that wall‐bound phenylpropanoids such as ferulic acid may constrain cell expansion and leaf elongation. In both species, HPLC analysis revealed that ferulic and p ‐coumaric acid were major components of both insoluble and soluble phenylpropanoids. Although there were no significant differences in concentrations between UV‐B treatments, concentrations of insoluble ferulic acid in D. antarctica tended to be higher under ambient and near‐ambient UV‐B than under reduced UV‐B ( P =0.17). We also examined bulk‐leaf concentrations of soluble (methanol extractable) UV‐B‐absorbing compounds and found that concentrations were higher in plants exposed to near‐ambient and ambient UV‐B than in ... |
format |
Article in Journal/Newspaper |
author |
Ruhland, Christopher T. Day, Thomas A. |
spellingShingle |
Ruhland, Christopher T. Day, Thomas A. Effects of ultraviolet‐B radiation on leaf elongation, production and phenylpropanoid concentrations of Deschampsia antarctica and Colobanthus quitensis in Antarctica |
author_facet |
Ruhland, Christopher T. Day, Thomas A. |
author_sort |
Ruhland, Christopher T. |
title |
Effects of ultraviolet‐B radiation on leaf elongation, production and phenylpropanoid concentrations of Deschampsia antarctica and Colobanthus quitensis in Antarctica |
title_short |
Effects of ultraviolet‐B radiation on leaf elongation, production and phenylpropanoid concentrations of Deschampsia antarctica and Colobanthus quitensis in Antarctica |
title_full |
Effects of ultraviolet‐B radiation on leaf elongation, production and phenylpropanoid concentrations of Deschampsia antarctica and Colobanthus quitensis in Antarctica |
title_fullStr |
Effects of ultraviolet‐B radiation on leaf elongation, production and phenylpropanoid concentrations of Deschampsia antarctica and Colobanthus quitensis in Antarctica |
title_full_unstemmed |
Effects of ultraviolet‐B radiation on leaf elongation, production and phenylpropanoid concentrations of Deschampsia antarctica and Colobanthus quitensis in Antarctica |
title_sort |
effects of ultraviolet‐b radiation on leaf elongation, production and phenylpropanoid concentrations of deschampsia antarctica and colobanthus quitensis in antarctica |
publisher |
Wiley |
publishDate |
2000 |
url |
http://dx.doi.org/10.1034/j.1399-3054.2000.100304.x https://api.wiley.com/onlinelibrary/tdm/v1/articles/10.1034%2Fj.1399-3054.2000.100304.x https://onlinelibrary.wiley.com/doi/pdf/10.1034/j.1399-3054.2000.100304.x |
genre |
Antarc* Antarctic Antarctic Peninsula Antarctica |
genre_facet |
Antarc* Antarctic Antarctic Peninsula Antarctica |
op_source |
Physiologia Plantarum volume 109, issue 3, page 244-251 ISSN 0031-9317 1399-3054 |
op_rights |
http://onlinelibrary.wiley.com/termsAndConditions#vor |
op_doi |
https://doi.org/10.1034/j.1399-3054.2000.100304.x |
container_title |
Physiologia Plantarum |
container_volume |
109 |
container_issue |
3 |
container_start_page |
244 |
op_container_end_page |
251 |
_version_ |
1810493169728487424 |