Water relations, temperatures, and mineral nutrients in Pedicularis dasyantha (Scrophulariaceae) from Svalbard, Norway
The arctic vascular hemiparasite Pedicularis dasyantha has a lower diffusion resistance for water vapour than any associated species. Excised leaves die within one hour of drought stress under laboratory conditions, in spite of a high succulence. Transpiration rates of P. dasyantha in the field are...
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crwiley:10.1111/j.1600-0587.1990.tb00596.x 2023-12-03T10:17:44+01:00 Water relations, temperatures, and mineral nutrients in Pedicularis dasyantha (Scrophulariaceae) from Svalbard, Norway Gauslaa, Yngvar Odasz, Ann Marie 1990 http://dx.doi.org/10.1111/j.1600-0587.1990.tb00596.x https://api.wiley.com/onlinelibrary/tdm/v1/articles/10.1111%2Fj.1600-0587.1990.tb00596.x https://onlinelibrary.wiley.com/doi/pdf/10.1111/j.1600-0587.1990.tb00596.x en eng Wiley http://onlinelibrary.wiley.com/termsAndConditions#vor Ecography volume 13, issue 2, page 112-121 ISSN 0906-7590 1600-0587 Ecology, Evolution, Behavior and Systematics journal-article 1990 crwiley https://doi.org/10.1111/j.1600-0587.1990.tb00596.x 2023-11-09T14:28:31Z The arctic vascular hemiparasite Pedicularis dasyantha has a lower diffusion resistance for water vapour than any associated species. Excised leaves die within one hour of drought stress under laboratory conditions, in spite of a high succulence. Transpiration rates of P. dasyantha in the field are almost two times higher than in Dryas octopetala , which is the most important host within investigated sites. Diffusion resistances are higher in inflorescences than in leaves, probably because the dense pubescence reduces transpiration rates and raises temperatures in inflorescences to 14°C above air temperature on clear days. Pedicularis dasyantha contains significantly more N, P, and especially K than its host. The high rate of transpiration probably enables the hemiparasite to capture a larger fraction of nutrients supplied by the xylem of its host. Article in Journal/Newspaper Arctic Dryas octopetala Pedicularis dasyantha Svalbard Wiley Online Library (via Crossref) Arctic Norway Svalbard Ecography 13 2 112 121 |
institution |
Open Polar |
collection |
Wiley Online Library (via Crossref) |
op_collection_id |
crwiley |
language |
English |
topic |
Ecology, Evolution, Behavior and Systematics |
spellingShingle |
Ecology, Evolution, Behavior and Systematics Gauslaa, Yngvar Odasz, Ann Marie Water relations, temperatures, and mineral nutrients in Pedicularis dasyantha (Scrophulariaceae) from Svalbard, Norway |
topic_facet |
Ecology, Evolution, Behavior and Systematics |
description |
The arctic vascular hemiparasite Pedicularis dasyantha has a lower diffusion resistance for water vapour than any associated species. Excised leaves die within one hour of drought stress under laboratory conditions, in spite of a high succulence. Transpiration rates of P. dasyantha in the field are almost two times higher than in Dryas octopetala , which is the most important host within investigated sites. Diffusion resistances are higher in inflorescences than in leaves, probably because the dense pubescence reduces transpiration rates and raises temperatures in inflorescences to 14°C above air temperature on clear days. Pedicularis dasyantha contains significantly more N, P, and especially K than its host. The high rate of transpiration probably enables the hemiparasite to capture a larger fraction of nutrients supplied by the xylem of its host. |
format |
Article in Journal/Newspaper |
author |
Gauslaa, Yngvar Odasz, Ann Marie |
author_facet |
Gauslaa, Yngvar Odasz, Ann Marie |
author_sort |
Gauslaa, Yngvar |
title |
Water relations, temperatures, and mineral nutrients in Pedicularis dasyantha (Scrophulariaceae) from Svalbard, Norway |
title_short |
Water relations, temperatures, and mineral nutrients in Pedicularis dasyantha (Scrophulariaceae) from Svalbard, Norway |
title_full |
Water relations, temperatures, and mineral nutrients in Pedicularis dasyantha (Scrophulariaceae) from Svalbard, Norway |
title_fullStr |
Water relations, temperatures, and mineral nutrients in Pedicularis dasyantha (Scrophulariaceae) from Svalbard, Norway |
title_full_unstemmed |
Water relations, temperatures, and mineral nutrients in Pedicularis dasyantha (Scrophulariaceae) from Svalbard, Norway |
title_sort |
water relations, temperatures, and mineral nutrients in pedicularis dasyantha (scrophulariaceae) from svalbard, norway |
publisher |
Wiley |
publishDate |
1990 |
url |
http://dx.doi.org/10.1111/j.1600-0587.1990.tb00596.x https://api.wiley.com/onlinelibrary/tdm/v1/articles/10.1111%2Fj.1600-0587.1990.tb00596.x https://onlinelibrary.wiley.com/doi/pdf/10.1111/j.1600-0587.1990.tb00596.x |
geographic |
Arctic Norway Svalbard |
geographic_facet |
Arctic Norway Svalbard |
genre |
Arctic Dryas octopetala Pedicularis dasyantha Svalbard |
genre_facet |
Arctic Dryas octopetala Pedicularis dasyantha Svalbard |
op_source |
Ecography volume 13, issue 2, page 112-121 ISSN 0906-7590 1600-0587 |
op_rights |
http://onlinelibrary.wiley.com/termsAndConditions#vor |
op_doi |
https://doi.org/10.1111/j.1600-0587.1990.tb00596.x |
container_title |
Ecography |
container_volume |
13 |
container_issue |
2 |
container_start_page |
112 |
op_container_end_page |
121 |
_version_ |
1784264683518164992 |