Comparative vessel anatomy of arctic deciduous and evergreen dicots
Arctic tundra plant species exhibit striking variation in leaf character and growth form. Both are likely related to differences in vessel anatomy, and all may affect responses to climate changes in the Arctic. To investigate the relationships among leaf character, growth form, vessel anatomy, and s...
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crwiley:10.2307/3558409 2024-09-15T18:08:06+00:00 Comparative vessel anatomy of arctic deciduous and evergreen dicots Gorsuch, Dennis M. Oberbauer, Steven F. Fisher, Jack B. 2001 http://dx.doi.org/10.2307/3558409 https://api.wiley.com/onlinelibrary/tdm/v1/articles/10.2307%2F3558409 http://onlinelibrary.wiley.com/wol1/doi/10.2307/3558409/fullpdf en eng Wiley http://onlinelibrary.wiley.com/termsAndConditions#vor American Journal of Botany volume 88, issue 9, page 1643-1649 ISSN 0002-9122 1537-2197 journal-article 2001 crwiley https://doi.org/10.2307/3558409 2024-07-30T04:17:35Z Arctic tundra plant species exhibit striking variation in leaf character and growth form. Both are likely related to differences in vessel anatomy, and all may affect responses to climate changes in the Arctic. To investigate the relationships among leaf character, growth form, vessel anatomy, and susceptibility to freeze‐thaw‐induced xylem cavitation, xylem vessel characteristics were compared among six deciduous and six evergreen arctic dicot species of erect and prostrate growth forms. We hypothesized that deciduous and erect species would have larger and longer vessels than evergreen and cushion/mat‐forming species. Vessel lengths, diameters, and densities were measured for each species. Theoretical vessel flow rates were calculated using Poiseuille's law for ideal capillaries. Flow rates were used to determine the susceptibility of vessels to cavitation induced by freeze‐thaw events that may become more frequent with global warming. Vessel diameters were larger in deciduous species compared to evergreens, and in shrubs/trees vs. cushion/mat‐forming plants. Vessel length distributions, however, did not differ for growth form or leaf character. Vessel density was greater in cushion/mat‐forming species than in shrub/tree species. Deciduous plants showed a greater contribution to total conductivity by relatively larger vessels than evergreens. One of the deciduous species, Vaccinium uliginosum , is predicted to be susceptible to freeze‐thaw‐induced cavitation. These results have important implications for future arctic species composition and plant community structure. Article in Journal/Newspaper Global warming Tundra Wiley Online Library American Journal of Botany 88 9 1643 1649 |
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English |
description |
Arctic tundra plant species exhibit striking variation in leaf character and growth form. Both are likely related to differences in vessel anatomy, and all may affect responses to climate changes in the Arctic. To investigate the relationships among leaf character, growth form, vessel anatomy, and susceptibility to freeze‐thaw‐induced xylem cavitation, xylem vessel characteristics were compared among six deciduous and six evergreen arctic dicot species of erect and prostrate growth forms. We hypothesized that deciduous and erect species would have larger and longer vessels than evergreen and cushion/mat‐forming species. Vessel lengths, diameters, and densities were measured for each species. Theoretical vessel flow rates were calculated using Poiseuille's law for ideal capillaries. Flow rates were used to determine the susceptibility of vessels to cavitation induced by freeze‐thaw events that may become more frequent with global warming. Vessel diameters were larger in deciduous species compared to evergreens, and in shrubs/trees vs. cushion/mat‐forming plants. Vessel length distributions, however, did not differ for growth form or leaf character. Vessel density was greater in cushion/mat‐forming species than in shrub/tree species. Deciduous plants showed a greater contribution to total conductivity by relatively larger vessels than evergreens. One of the deciduous species, Vaccinium uliginosum , is predicted to be susceptible to freeze‐thaw‐induced cavitation. These results have important implications for future arctic species composition and plant community structure. |
format |
Article in Journal/Newspaper |
author |
Gorsuch, Dennis M. Oberbauer, Steven F. Fisher, Jack B. |
spellingShingle |
Gorsuch, Dennis M. Oberbauer, Steven F. Fisher, Jack B. Comparative vessel anatomy of arctic deciduous and evergreen dicots |
author_facet |
Gorsuch, Dennis M. Oberbauer, Steven F. Fisher, Jack B. |
author_sort |
Gorsuch, Dennis M. |
title |
Comparative vessel anatomy of arctic deciduous and evergreen dicots |
title_short |
Comparative vessel anatomy of arctic deciduous and evergreen dicots |
title_full |
Comparative vessel anatomy of arctic deciduous and evergreen dicots |
title_fullStr |
Comparative vessel anatomy of arctic deciduous and evergreen dicots |
title_full_unstemmed |
Comparative vessel anatomy of arctic deciduous and evergreen dicots |
title_sort |
comparative vessel anatomy of arctic deciduous and evergreen dicots |
publisher |
Wiley |
publishDate |
2001 |
url |
http://dx.doi.org/10.2307/3558409 https://api.wiley.com/onlinelibrary/tdm/v1/articles/10.2307%2F3558409 http://onlinelibrary.wiley.com/wol1/doi/10.2307/3558409/fullpdf |
genre |
Global warming Tundra |
genre_facet |
Global warming Tundra |
op_source |
American Journal of Botany volume 88, issue 9, page 1643-1649 ISSN 0002-9122 1537-2197 |
op_rights |
http://onlinelibrary.wiley.com/termsAndConditions#vor |
op_doi |
https://doi.org/10.2307/3558409 |
container_title |
American Journal of Botany |
container_volume |
88 |
container_issue |
9 |
container_start_page |
1643 |
op_container_end_page |
1649 |
_version_ |
1810445452837912576 |