Ultrastructural Responses of the LichenBryoria fuscescensto Simulated Acid Rain and Heavy Metal Deposition
Effects of simulated acid rain and heavy metal deposition on the ultrastructure of the lichen Bryoria fuscescens (Gyeln.) Brodo and Hawksw. were examined in a field study conducted in northern Finland. Lichens were exposed to simulated rain containing two levels of a mixture of copper (Cu2+) and nic...
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1998
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fthighwire:oai:open-archive.highwire.org:annbot:82/6/735 2023-05-15T17:42:40+02:00 Ultrastructural Responses of the LichenBryoria fuscescensto Simulated Acid Rain and Heavy Metal Deposition TARHANEN, S. 1998-12-01 00:00:00.0 text/html http://aob.oxfordjournals.org/cgi/content/short/82/6/735 https://doi.org/10.1006/anbo.1998.0734 en eng Oxford University Press http://aob.oxfordjournals.org/cgi/content/short/82/6/735 http://dx.doi.org/10.1006/anbo.1998.0734 Copyright (C) 1998, Oxford University Press ORIGINAL ARTICLES TEXT 1998 fthighwire https://doi.org/10.1006/anbo.1998.0734 2013-05-27T12:42:57Z Effects of simulated acid rain and heavy metal deposition on the ultrastructure of the lichen Bryoria fuscescens (Gyeln.) Brodo and Hawksw. were examined in a field study conducted in northern Finland. Lichens were exposed to simulated rain containing two levels of a mixture of copper (Cu2+) and nickel (Ni2+) ions alone or in combination with acid rain (H 2 SO 4 ) at pH 3 over 2 months in addition to ambient rainfall. The algal and fungal components responded differently to pH and there was an interaction with metal toxicity. The algal partner was the most sensitive to acid rain and heavy metal combinations and had more degenerate cells than the fungal partner. Damage was apparent in chloroplasts and mitochondria, where thylakoid and mitochondrial cristae were swollen. The fungal partner was the more sensitive to high concentrations of metal ions in the absence of acidity, suggesting an ameliorating interaction between the metals and acidity. For algae, critical metal concentrations in the thallus were >50 μg g−1for Cu and >7 μg g−1for Ni in the presence of acidity, and >20 μ g g−1for Ni in the absence of acidity. Detrimental effects of heavy metals on fungal ultrastructure were seen when thallus metal concentrations exceeded 400 μg g−1for Cu and 100 μg g−1d. wt for Ni. The results suggest that acid wet deposition containing metal ions may reduce survival of lichens in northern environments. Copyright 1998 Annals of Botany Company. Text Northern Finland HighWire Press (Stanford University) Annals of Botany 82 6 735 746 |
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HighWire Press (Stanford University) |
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English |
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ORIGINAL ARTICLES |
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ORIGINAL ARTICLES TARHANEN, S. Ultrastructural Responses of the LichenBryoria fuscescensto Simulated Acid Rain and Heavy Metal Deposition |
topic_facet |
ORIGINAL ARTICLES |
description |
Effects of simulated acid rain and heavy metal deposition on the ultrastructure of the lichen Bryoria fuscescens (Gyeln.) Brodo and Hawksw. were examined in a field study conducted in northern Finland. Lichens were exposed to simulated rain containing two levels of a mixture of copper (Cu2+) and nickel (Ni2+) ions alone or in combination with acid rain (H 2 SO 4 ) at pH 3 over 2 months in addition to ambient rainfall. The algal and fungal components responded differently to pH and there was an interaction with metal toxicity. The algal partner was the most sensitive to acid rain and heavy metal combinations and had more degenerate cells than the fungal partner. Damage was apparent in chloroplasts and mitochondria, where thylakoid and mitochondrial cristae were swollen. The fungal partner was the more sensitive to high concentrations of metal ions in the absence of acidity, suggesting an ameliorating interaction between the metals and acidity. For algae, critical metal concentrations in the thallus were >50 μg g−1for Cu and >7 μg g−1for Ni in the presence of acidity, and >20 μ g g−1for Ni in the absence of acidity. Detrimental effects of heavy metals on fungal ultrastructure were seen when thallus metal concentrations exceeded 400 μg g−1for Cu and 100 μg g−1d. wt for Ni. The results suggest that acid wet deposition containing metal ions may reduce survival of lichens in northern environments. Copyright 1998 Annals of Botany Company. |
format |
Text |
author |
TARHANEN, S. |
author_facet |
TARHANEN, S. |
author_sort |
TARHANEN, S. |
title |
Ultrastructural Responses of the LichenBryoria fuscescensto Simulated Acid Rain and Heavy Metal Deposition |
title_short |
Ultrastructural Responses of the LichenBryoria fuscescensto Simulated Acid Rain and Heavy Metal Deposition |
title_full |
Ultrastructural Responses of the LichenBryoria fuscescensto Simulated Acid Rain and Heavy Metal Deposition |
title_fullStr |
Ultrastructural Responses of the LichenBryoria fuscescensto Simulated Acid Rain and Heavy Metal Deposition |
title_full_unstemmed |
Ultrastructural Responses of the LichenBryoria fuscescensto Simulated Acid Rain and Heavy Metal Deposition |
title_sort |
ultrastructural responses of the lichenbryoria fuscescensto simulated acid rain and heavy metal deposition |
publisher |
Oxford University Press |
publishDate |
1998 |
url |
http://aob.oxfordjournals.org/cgi/content/short/82/6/735 https://doi.org/10.1006/anbo.1998.0734 |
genre |
Northern Finland |
genre_facet |
Northern Finland |
op_relation |
http://aob.oxfordjournals.org/cgi/content/short/82/6/735 http://dx.doi.org/10.1006/anbo.1998.0734 |
op_rights |
Copyright (C) 1998, Oxford University Press |
op_doi |
https://doi.org/10.1006/anbo.1998.0734 |
container_title |
Annals of Botany |
container_volume |
82 |
container_issue |
6 |
container_start_page |
735 |
op_container_end_page |
746 |
_version_ |
1766144562196119552 |