Drought tolerance in the alpine dandelion, Taraxacum ceratophorum(Asteraceae), its exotic congener T. officinale, and interspecific hybrids under natural and experimental conditions
We compared water relations and adaptations to drought stress in native and invasive exotic dandelions, Taraxacum ceratophorum and T. officinale . Photosynthesis ( A ), transpiration ( E ), and water use efficiency (WUE; carbon gained/water lost) were measured for the two species under extreme droug...
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crwiley:10.3732/ajb.92.8.1311 2024-06-23T07:57:18+00:00 Drought tolerance in the alpine dandelion, Taraxacum ceratophorum(Asteraceae), its exotic congener T. officinale, and interspecific hybrids under natural and experimental conditions Brock, Marcus T. Galen, Candace National Science Foundation 2005 http://dx.doi.org/10.3732/ajb.92.8.1311 https://api.wiley.com/onlinelibrary/tdm/v1/articles/10.3732%2Fajb.92.8.1311 https://onlinelibrary.wiley.com/doi/pdf/10.3732/ajb.92.8.1311 https://onlinelibrary.wiley.com/doi/full-xml/10.3732/ajb.92.8.1311 http://api.wiley.com/onlinelibrary/chorus/v1/articles/10.3732%2Fajb.92.8.1311 en eng Wiley http://onlinelibrary.wiley.com/termsAndConditions#vor American Journal of Botany volume 92, issue 8, page 1311-1321 ISSN 0002-9122 1537-2197 journal-article 2005 crwiley https://doi.org/10.3732/ajb.92.8.1311 2024-06-13T04:21:55Z We compared water relations and adaptations to drought stress in native and invasive exotic dandelions, Taraxacum ceratophorum and T. officinale . Photosynthesis ( A ), transpiration ( E ), and water use efficiency (WUE; carbon gained/water lost) were measured for the two species under extreme drought in the alpine tundra of Colorado, USA. We also subjected both species and F 1 hybrids to a dry‐down experiment to determine how relative physiological performance varied with water availability. Photosynthesis and transpiration in the field were low and did not differ between Taraxacum congeners; however, native T. ceratophorum had higher WUE than T. officinale . After 6 days of greenhouse drought, photosynthesis and transpiration were reduced in T. officinale compared to T. ceratophorum . Taraxacum ceratophorum maintained high WUE under control and drought treatments. Conversely, WUE in T. officinale was highly plastic between watered (low WUE) and dry‐down (high WUE) treatments. Hybrids did not exhibit heterosis; instead, they were similar to T. officinale in A and E and intermediate to the parental species in WUE. Overall, results suggest that native dandelions are more drought tolerant than invasive congeners or their hybrids, but have less plasticity in WUE. Arid habitats and occasional drought in mesic sites may provide native dandelions with refugia from negative interactions with invasives. Article in Journal/Newspaper Tundra Wiley Online Library American Journal of Botany 92 8 1311 1321 |
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Wiley Online Library |
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crwiley |
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English |
description |
We compared water relations and adaptations to drought stress in native and invasive exotic dandelions, Taraxacum ceratophorum and T. officinale . Photosynthesis ( A ), transpiration ( E ), and water use efficiency (WUE; carbon gained/water lost) were measured for the two species under extreme drought in the alpine tundra of Colorado, USA. We also subjected both species and F 1 hybrids to a dry‐down experiment to determine how relative physiological performance varied with water availability. Photosynthesis and transpiration in the field were low and did not differ between Taraxacum congeners; however, native T. ceratophorum had higher WUE than T. officinale . After 6 days of greenhouse drought, photosynthesis and transpiration were reduced in T. officinale compared to T. ceratophorum . Taraxacum ceratophorum maintained high WUE under control and drought treatments. Conversely, WUE in T. officinale was highly plastic between watered (low WUE) and dry‐down (high WUE) treatments. Hybrids did not exhibit heterosis; instead, they were similar to T. officinale in A and E and intermediate to the parental species in WUE. Overall, results suggest that native dandelions are more drought tolerant than invasive congeners or their hybrids, but have less plasticity in WUE. Arid habitats and occasional drought in mesic sites may provide native dandelions with refugia from negative interactions with invasives. |
author2 |
National Science Foundation |
format |
Article in Journal/Newspaper |
author |
Brock, Marcus T. Galen, Candace |
spellingShingle |
Brock, Marcus T. Galen, Candace Drought tolerance in the alpine dandelion, Taraxacum ceratophorum(Asteraceae), its exotic congener T. officinale, and interspecific hybrids under natural and experimental conditions |
author_facet |
Brock, Marcus T. Galen, Candace |
author_sort |
Brock, Marcus T. |
title |
Drought tolerance in the alpine dandelion, Taraxacum ceratophorum(Asteraceae), its exotic congener T. officinale, and interspecific hybrids under natural and experimental conditions |
title_short |
Drought tolerance in the alpine dandelion, Taraxacum ceratophorum(Asteraceae), its exotic congener T. officinale, and interspecific hybrids under natural and experimental conditions |
title_full |
Drought tolerance in the alpine dandelion, Taraxacum ceratophorum(Asteraceae), its exotic congener T. officinale, and interspecific hybrids under natural and experimental conditions |
title_fullStr |
Drought tolerance in the alpine dandelion, Taraxacum ceratophorum(Asteraceae), its exotic congener T. officinale, and interspecific hybrids under natural and experimental conditions |
title_full_unstemmed |
Drought tolerance in the alpine dandelion, Taraxacum ceratophorum(Asteraceae), its exotic congener T. officinale, and interspecific hybrids under natural and experimental conditions |
title_sort |
drought tolerance in the alpine dandelion, taraxacum ceratophorum(asteraceae), its exotic congener t. officinale, and interspecific hybrids under natural and experimental conditions |
publisher |
Wiley |
publishDate |
2005 |
url |
http://dx.doi.org/10.3732/ajb.92.8.1311 https://api.wiley.com/onlinelibrary/tdm/v1/articles/10.3732%2Fajb.92.8.1311 https://onlinelibrary.wiley.com/doi/pdf/10.3732/ajb.92.8.1311 https://onlinelibrary.wiley.com/doi/full-xml/10.3732/ajb.92.8.1311 http://api.wiley.com/onlinelibrary/chorus/v1/articles/10.3732%2Fajb.92.8.1311 |
genre |
Tundra |
genre_facet |
Tundra |
op_source |
American Journal of Botany volume 92, issue 8, page 1311-1321 ISSN 0002-9122 1537-2197 |
op_rights |
http://onlinelibrary.wiley.com/termsAndConditions#vor |
op_doi |
https://doi.org/10.3732/ajb.92.8.1311 |
container_title |
American Journal of Botany |
container_volume |
92 |
container_issue |
8 |
container_start_page |
1311 |
op_container_end_page |
1321 |
_version_ |
1802650863475359744 |