Leaf Ultraviolet Optical Properties Along a Latitudinal Gradient in the Arctic‐Alpine Life Zone
Leaf epidermal transmittance of terrestrial solar ultraviolet—B radiation (295—320 nm) was examined along a latitudinal gradient of solar UV—B radiation. In high UV—B radiation zones, e.g., equatorial and tropical regions, mean epidermal transmittance for the species examined was less than 2%. At hi...
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Online Access: | http://dx.doi.org/10.2307/1937427 http://api.wiley.com/onlinelibrary/tdm/v1/articles/10.2307%2F1937427 https://api.wiley.com/onlinelibrary/tdm/v1/articles/10.2307%2F1937427 https://esajournals.onlinelibrary.wiley.com/doi/pdf/10.2307/1937427 |
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crwiley:10.2307/1937427 2024-04-28T08:11:12+00:00 Leaf Ultraviolet Optical Properties Along a Latitudinal Gradient in the Arctic‐Alpine Life Zone Robberecht, Ronald Caldwell, Martyn M. Billings, W. D. 1980 http://dx.doi.org/10.2307/1937427 http://api.wiley.com/onlinelibrary/tdm/v1/articles/10.2307%2F1937427 https://api.wiley.com/onlinelibrary/tdm/v1/articles/10.2307%2F1937427 https://esajournals.onlinelibrary.wiley.com/doi/pdf/10.2307/1937427 en eng Wiley http://onlinelibrary.wiley.com/termsAndConditions#vor Ecology volume 61, issue 3, page 612-619 ISSN 0012-9658 1939-9170 Ecology, Evolution, Behavior and Systematics journal-article 1980 crwiley https://doi.org/10.2307/1937427 2024-04-08T06:57:02Z Leaf epidermal transmittance of terrestrial solar ultraviolet—B radiation (295—320 nm) was examined along a latitudinal gradient of solar UV—B radiation. In high UV—B radiation zones, e.g., equatorial and tropical regions, mean epidermal transmittance for the species examined was less than 2%. At higher latitudes, mean epidermal transmittance exceeded 5%. Although this latitudinal solar UV—B gradient represents more than a seven—fold difference in daily integrated UV—B irradiance, the calculated mean effective UV—B irradiance at the mesophyll of low—latitude species is not substantially different from that of species at higher latitudes. Species in high UV—B radiation environments appear to attenuate this radiation more effectively than those in lower irradiance environments. In most cases, absorption of UV—B in the epidermis is the major parameter effecting low transmittance. Reflectance from glabrous leaves is generally less than 10%. In some species, pubescent or glaucous leaf surfaces can reflect more than 40% of the UV—B radiation incident on a horizontal leaf, although such surface characteristics do not necessarily indicate high UV—B reflectance. Under controlled conditions, epidermal transmittance in Pisum sativum L. decreased in response to UV—B irradiation. The modification of epidermal transmittance, resulting in lower UV—B irradiance at the mesophyll, may represent a mechanism of plant acclimation to UV—B radiation. Such acclimation may have occurred in several wildland species of temperate—latitude origin that have invaded high UV—B irradiance equatorial and tropical regions. Article in Journal/Newspaper Arctic Wiley Online Library Ecology 61 3 612 619 |
institution |
Open Polar |
collection |
Wiley Online Library |
op_collection_id |
crwiley |
language |
English |
topic |
Ecology, Evolution, Behavior and Systematics |
spellingShingle |
Ecology, Evolution, Behavior and Systematics Robberecht, Ronald Caldwell, Martyn M. Billings, W. D. Leaf Ultraviolet Optical Properties Along a Latitudinal Gradient in the Arctic‐Alpine Life Zone |
topic_facet |
Ecology, Evolution, Behavior and Systematics |
description |
Leaf epidermal transmittance of terrestrial solar ultraviolet—B radiation (295—320 nm) was examined along a latitudinal gradient of solar UV—B radiation. In high UV—B radiation zones, e.g., equatorial and tropical regions, mean epidermal transmittance for the species examined was less than 2%. At higher latitudes, mean epidermal transmittance exceeded 5%. Although this latitudinal solar UV—B gradient represents more than a seven—fold difference in daily integrated UV—B irradiance, the calculated mean effective UV—B irradiance at the mesophyll of low—latitude species is not substantially different from that of species at higher latitudes. Species in high UV—B radiation environments appear to attenuate this radiation more effectively than those in lower irradiance environments. In most cases, absorption of UV—B in the epidermis is the major parameter effecting low transmittance. Reflectance from glabrous leaves is generally less than 10%. In some species, pubescent or glaucous leaf surfaces can reflect more than 40% of the UV—B radiation incident on a horizontal leaf, although such surface characteristics do not necessarily indicate high UV—B reflectance. Under controlled conditions, epidermal transmittance in Pisum sativum L. decreased in response to UV—B irradiation. The modification of epidermal transmittance, resulting in lower UV—B irradiance at the mesophyll, may represent a mechanism of plant acclimation to UV—B radiation. Such acclimation may have occurred in several wildland species of temperate—latitude origin that have invaded high UV—B irradiance equatorial and tropical regions. |
format |
Article in Journal/Newspaper |
author |
Robberecht, Ronald Caldwell, Martyn M. Billings, W. D. |
author_facet |
Robberecht, Ronald Caldwell, Martyn M. Billings, W. D. |
author_sort |
Robberecht, Ronald |
title |
Leaf Ultraviolet Optical Properties Along a Latitudinal Gradient in the Arctic‐Alpine Life Zone |
title_short |
Leaf Ultraviolet Optical Properties Along a Latitudinal Gradient in the Arctic‐Alpine Life Zone |
title_full |
Leaf Ultraviolet Optical Properties Along a Latitudinal Gradient in the Arctic‐Alpine Life Zone |
title_fullStr |
Leaf Ultraviolet Optical Properties Along a Latitudinal Gradient in the Arctic‐Alpine Life Zone |
title_full_unstemmed |
Leaf Ultraviolet Optical Properties Along a Latitudinal Gradient in the Arctic‐Alpine Life Zone |
title_sort |
leaf ultraviolet optical properties along a latitudinal gradient in the arctic‐alpine life zone |
publisher |
Wiley |
publishDate |
1980 |
url |
http://dx.doi.org/10.2307/1937427 http://api.wiley.com/onlinelibrary/tdm/v1/articles/10.2307%2F1937427 https://api.wiley.com/onlinelibrary/tdm/v1/articles/10.2307%2F1937427 https://esajournals.onlinelibrary.wiley.com/doi/pdf/10.2307/1937427 |
genre |
Arctic |
genre_facet |
Arctic |
op_source |
Ecology volume 61, issue 3, page 612-619 ISSN 0012-9658 1939-9170 |
op_rights |
http://onlinelibrary.wiley.com/termsAndConditions#vor |
op_doi |
https://doi.org/10.2307/1937427 |
container_title |
Ecology |
container_volume |
61 |
container_issue |
3 |
container_start_page |
612 |
op_container_end_page |
619 |
_version_ |
1797578729093857280 |