Acid rain effects on foliar histology of Artemisia tilesii
The present study describes the effects of simulated acid rain (pH 2.5–5.6) on foliar histology of an arctic herb, Artemisia tilesii Ledeb., which is remarkably tolerant to naturally occurring atmospheric acidity at Smoking Hills, N.W.T. Plants were exposed to simulated acid rain twice weekly for 4...
Published in: | Canadian Journal of Botany |
---|---|
Main Authors: | , , |
Format: | Article in Journal/Newspaper |
Language: | English |
Published: |
Canadian Science Publishing
1984
|
Subjects: | |
Online Access: | http://dx.doi.org/10.1139/b84-070 http://www.nrcresearchpress.com/doi/pdf/10.1139/b84-070 |
id |
crcansciencepubl:10.1139/b84-070 |
---|---|
record_format |
openpolar |
spelling |
crcansciencepubl:10.1139/b84-070 2024-06-23T07:50:32+00:00 Acid rain effects on foliar histology of Artemisia tilesii Adams, C. M. Dengler, N. G. Hutchinson, T. C. 1984 http://dx.doi.org/10.1139/b84-070 http://www.nrcresearchpress.com/doi/pdf/10.1139/b84-070 en eng Canadian Science Publishing http://www.nrcresearchpress.com/page/about/CorporateTextAndDataMining Canadian Journal of Botany volume 62, issue 3, page 463-474 ISSN 0008-4026 journal-article 1984 crcansciencepubl https://doi.org/10.1139/b84-070 2024-06-13T04:10:51Z The present study describes the effects of simulated acid rain (pH 2.5–5.6) on foliar histology of an arctic herb, Artemisia tilesii Ledeb., which is remarkably tolerant to naturally occurring atmospheric acidity at Smoking Hills, N.W.T. Plants were exposed to simulated acid rain twice weekly for 4 weeks in exposure chambers in the greenhouse. Droplets as acidic as pH 2.5 caused limited macroscopic foliar damage. However, much greater damage was observed when sectioned leaf tissue was examined microscopically. On leaves having no injury visible to the unaided eye, small lesions consisting of one to three collapsed epidermal cells were observed in scanning electron micrographs and in cleared leaves after exposure to rain of pH 3.0 and 3.5. Stomata remained open in damaged areas of acid-sprayed leaves. Lesions most commonly developed from an initial collapse of a few adaxial epidermal cells, followed by progressive injury of underlying tissues. Palisade and spongy mesophyll cells underwent hypertrophic (abnormal cell enlargement) and hyperplastic (abnormal cell division) responses in the region adjacent to severely collapsed tissue, causing reduced intercellular spaces. These effects isolated the injured areas from adjacent healthy tissues, and resembled wound periderm responses to fungal pathogens and to mechanical irritation. This response may be one mechanism of limiting acid rain damage. Article in Journal/Newspaper Arctic Canadian Science Publishing Arctic Smoking Hills ENVELOPE(-126.638,-126.638,69.559,69.559) Canadian Journal of Botany 62 3 463 474 |
institution |
Open Polar |
collection |
Canadian Science Publishing |
op_collection_id |
crcansciencepubl |
language |
English |
description |
The present study describes the effects of simulated acid rain (pH 2.5–5.6) on foliar histology of an arctic herb, Artemisia tilesii Ledeb., which is remarkably tolerant to naturally occurring atmospheric acidity at Smoking Hills, N.W.T. Plants were exposed to simulated acid rain twice weekly for 4 weeks in exposure chambers in the greenhouse. Droplets as acidic as pH 2.5 caused limited macroscopic foliar damage. However, much greater damage was observed when sectioned leaf tissue was examined microscopically. On leaves having no injury visible to the unaided eye, small lesions consisting of one to three collapsed epidermal cells were observed in scanning electron micrographs and in cleared leaves after exposure to rain of pH 3.0 and 3.5. Stomata remained open in damaged areas of acid-sprayed leaves. Lesions most commonly developed from an initial collapse of a few adaxial epidermal cells, followed by progressive injury of underlying tissues. Palisade and spongy mesophyll cells underwent hypertrophic (abnormal cell enlargement) and hyperplastic (abnormal cell division) responses in the region adjacent to severely collapsed tissue, causing reduced intercellular spaces. These effects isolated the injured areas from adjacent healthy tissues, and resembled wound periderm responses to fungal pathogens and to mechanical irritation. This response may be one mechanism of limiting acid rain damage. |
format |
Article in Journal/Newspaper |
author |
Adams, C. M. Dengler, N. G. Hutchinson, T. C. |
spellingShingle |
Adams, C. M. Dengler, N. G. Hutchinson, T. C. Acid rain effects on foliar histology of Artemisia tilesii |
author_facet |
Adams, C. M. Dengler, N. G. Hutchinson, T. C. |
author_sort |
Adams, C. M. |
title |
Acid rain effects on foliar histology of Artemisia tilesii |
title_short |
Acid rain effects on foliar histology of Artemisia tilesii |
title_full |
Acid rain effects on foliar histology of Artemisia tilesii |
title_fullStr |
Acid rain effects on foliar histology of Artemisia tilesii |
title_full_unstemmed |
Acid rain effects on foliar histology of Artemisia tilesii |
title_sort |
acid rain effects on foliar histology of artemisia tilesii |
publisher |
Canadian Science Publishing |
publishDate |
1984 |
url |
http://dx.doi.org/10.1139/b84-070 http://www.nrcresearchpress.com/doi/pdf/10.1139/b84-070 |
long_lat |
ENVELOPE(-126.638,-126.638,69.559,69.559) |
geographic |
Arctic Smoking Hills |
geographic_facet |
Arctic Smoking Hills |
genre |
Arctic |
genre_facet |
Arctic |
op_source |
Canadian Journal of Botany volume 62, issue 3, page 463-474 ISSN 0008-4026 |
op_rights |
http://www.nrcresearchpress.com/page/about/CorporateTextAndDataMining |
op_doi |
https://doi.org/10.1139/b84-070 |
container_title |
Canadian Journal of Botany |
container_volume |
62 |
container_issue |
3 |
container_start_page |
463 |
op_container_end_page |
474 |
_version_ |
1802641436978446336 |