A survey of mycorrhizal plants on Truelove Lowland, Devon Island, N.W.T., Canada
Although mycorrhizal associations are commonly found on roots of most plant species, little is known about the presence or absence of mycorrhizae in arctic regions. In the Canadian High Arctic, roots of 55 herbaceous and woody plant species were examined for mycorrhizae during the summers of 1987 an...
Published in: | Canadian Journal of Botany |
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Language: | French |
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Canadian Science Publishing
1990
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crcansciencepubl:10.1139/b90-242 2024-09-15T18:01:47+00:00 A survey of mycorrhizal plants on Truelove Lowland, Devon Island, N.W.T., Canada Bledsoe, C. Klein, P. Bliss, L. C. 1990 http://dx.doi.org/10.1139/b90-242 http://www.nrcresearchpress.com/doi/pdf/10.1139/b90-242 fr fre Canadian Science Publishing http://www.nrcresearchpress.com/page/about/CorporateTextAndDataMining Canadian Journal of Botany volume 68, issue 9, page 1848-1856 ISSN 0008-4026 journal-article 1990 crcansciencepubl https://doi.org/10.1139/b90-242 2024-08-15T04:09:29Z Although mycorrhizal associations are commonly found on roots of most plant species, little is known about the presence or absence of mycorrhizae in arctic regions. In the Canadian High Arctic, roots of 55 herbaceous and woody plant species were examined for mycorrhizae during the summers of 1987 and 1988 on Devon Island, N.W.T. Ectomycorrhizal associations were found on roots of Salix arctica, Dryas integrifolia, and Potentilla hyparctica; ericoid mycorrhizae formed on Cassiope tetragona and Vaccinium uliginosum. Ectomycorrhizal roots were often covered with black hyphae resembling the fungus Cenococcum geophilum; sclerotia characteristic of this fungus were found in soil extracts. Plants expected to have endomycorrhizal associations were apparently nonmycorrhizal in the traditional sense, since no arbuscules, vesicles, or pelotons were found on any roots during two field seasons. Although extensive fungal hyphae were often present on and within roots, these hyphae could not be conclusively identified as endomycorrhizal. Some dark, septate hyphae were present; their function, although unknown, may be beneficial to the host. In a series of greenhouse bioassays using arctic soils, no endomycorrhizal associations developed on test plants. Spores of vesicular–arbuscular fungi were not found in soil extracts. Thus in this survey, only ectomycorrhizal associations were observed, suggesting that the cold, dry winter and cold, wet summer climates in this area of the High Arctic severely limit formation of endomycorrhizae. Key words: roots, fungi, ectomycorrhizae, endomycorrhizae, arctic. Article in Journal/Newspaper Cassiope tetragona Devon Island Potentilla hyparctica Canadian Science Publishing Canadian Journal of Botany 68 9 1848 1856 |
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Canadian Science Publishing |
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crcansciencepubl |
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French |
description |
Although mycorrhizal associations are commonly found on roots of most plant species, little is known about the presence or absence of mycorrhizae in arctic regions. In the Canadian High Arctic, roots of 55 herbaceous and woody plant species were examined for mycorrhizae during the summers of 1987 and 1988 on Devon Island, N.W.T. Ectomycorrhizal associations were found on roots of Salix arctica, Dryas integrifolia, and Potentilla hyparctica; ericoid mycorrhizae formed on Cassiope tetragona and Vaccinium uliginosum. Ectomycorrhizal roots were often covered with black hyphae resembling the fungus Cenococcum geophilum; sclerotia characteristic of this fungus were found in soil extracts. Plants expected to have endomycorrhizal associations were apparently nonmycorrhizal in the traditional sense, since no arbuscules, vesicles, or pelotons were found on any roots during two field seasons. Although extensive fungal hyphae were often present on and within roots, these hyphae could not be conclusively identified as endomycorrhizal. Some dark, septate hyphae were present; their function, although unknown, may be beneficial to the host. In a series of greenhouse bioassays using arctic soils, no endomycorrhizal associations developed on test plants. Spores of vesicular–arbuscular fungi were not found in soil extracts. Thus in this survey, only ectomycorrhizal associations were observed, suggesting that the cold, dry winter and cold, wet summer climates in this area of the High Arctic severely limit formation of endomycorrhizae. Key words: roots, fungi, ectomycorrhizae, endomycorrhizae, arctic. |
format |
Article in Journal/Newspaper |
author |
Bledsoe, C. Klein, P. Bliss, L. C. |
spellingShingle |
Bledsoe, C. Klein, P. Bliss, L. C. A survey of mycorrhizal plants on Truelove Lowland, Devon Island, N.W.T., Canada |
author_facet |
Bledsoe, C. Klein, P. Bliss, L. C. |
author_sort |
Bledsoe, C. |
title |
A survey of mycorrhizal plants on Truelove Lowland, Devon Island, N.W.T., Canada |
title_short |
A survey of mycorrhizal plants on Truelove Lowland, Devon Island, N.W.T., Canada |
title_full |
A survey of mycorrhizal plants on Truelove Lowland, Devon Island, N.W.T., Canada |
title_fullStr |
A survey of mycorrhizal plants on Truelove Lowland, Devon Island, N.W.T., Canada |
title_full_unstemmed |
A survey of mycorrhizal plants on Truelove Lowland, Devon Island, N.W.T., Canada |
title_sort |
survey of mycorrhizal plants on truelove lowland, devon island, n.w.t., canada |
publisher |
Canadian Science Publishing |
publishDate |
1990 |
url |
http://dx.doi.org/10.1139/b90-242 http://www.nrcresearchpress.com/doi/pdf/10.1139/b90-242 |
genre |
Cassiope tetragona Devon Island Potentilla hyparctica |
genre_facet |
Cassiope tetragona Devon Island Potentilla hyparctica |
op_source |
Canadian Journal of Botany volume 68, issue 9, page 1848-1856 ISSN 0008-4026 |
op_rights |
http://www.nrcresearchpress.com/page/about/CorporateTextAndDataMining |
op_doi |
https://doi.org/10.1139/b90-242 |
container_title |
Canadian Journal of Botany |
container_volume |
68 |
container_issue |
9 |
container_start_page |
1848 |
op_container_end_page |
1856 |
_version_ |
1810438858885562368 |