Intraclonal variation in defence substances and palatability: a study on Carex and lemmings
Clonal sedges consist of integrated ramets at different development stages. Many of these sedges are important food for herbivores, yet differences in herbivore preferences and defence allocation between ramet development stages have not previously been evaluated. In this study we investigated intra...
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Wiley-Blackwell
2004
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Online Access: | https://lup.lub.lu.se/record/137014 https://doi.org/10.1111/j.0030-1299.2004.12926.x https://portal.research.lu.se/files/2705600/624626.pdf |
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ftulundlup:oai:lup.lub.lu.se:bc009f70-38d9-492d-a215-ff7394b7efd5 2023-05-15T17:07:28+02:00 Intraclonal variation in defence substances and palatability: a study on Carex and lemmings Bråthen, KA Agrell, Jep Berteaux, D Jonsdottir, IS 2004 application/pdf https://lup.lub.lu.se/record/137014 https://doi.org/10.1111/j.0030-1299.2004.12926.x https://portal.research.lu.se/files/2705600/624626.pdf eng eng Wiley-Blackwell https://lup.lub.lu.se/record/137014 http://dx.doi.org/10.1111/j.0030-1299.2004.12926.x https://portal.research.lu.se/files/2705600/624626.pdf wos:000221438100002 scopus:3042595849 info:eu-repo/semantics/openAccess Oikos; 105(3), pp 461-470 (2004) ISSN: 1600-0706 Ecology contributiontojournal/article info:eu-repo/semantics/article text 2004 ftulundlup https://doi.org/10.1111/j.0030-1299.2004.12926.x 2023-02-01T23:28:40Z Clonal sedges consist of integrated ramets at different development stages. Many of these sedges are important food for herbivores, yet differences in herbivore preferences and defence allocation between ramet development stages have not previously been evaluated. In this study we investigated intraclonal ramet variation in level of plant defence and nutrient compounds and intraclonal ramet preferences by lemmings (Lemmus trimucronatus) in field samples of a rhizomatous sedge (Carex stans). Plant defence was measured as the level of proteinase inhibitor activity (PIA) and the ratio of PIA to soluble plant proteins (SPP), whereas plant nutrients were measured as the level of soluble plant sugars (SPS) and SPP. Flowering ramets generally had a higher content of defence compared to vegetative ramets, which is consistent with the optimal defence theory predicting that defence compounds are allocated to the ramet stage of the highest fitness value. Compared to vegetative ramets, the flowering ramets had a lower content of SPP and a higher content of SPS. The lemmings showed preference differences between the ramet development stages, and to a large extent the ramet content of defence compounds and nutrient compounds covaried with these preferences in the predicted way. This study shows that defence allocation between ramet development stages of the clonal sedge Carex conforms to predictions of the optimal defence theory. Article in Journal/Newspaper Lemmus trimucronatus Lund University Publications (LUP) Oikos 105 3 461 470 |
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Open Polar |
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Lund University Publications (LUP) |
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ftulundlup |
language |
English |
topic |
Ecology |
spellingShingle |
Ecology Bråthen, KA Agrell, Jep Berteaux, D Jonsdottir, IS Intraclonal variation in defence substances and palatability: a study on Carex and lemmings |
topic_facet |
Ecology |
description |
Clonal sedges consist of integrated ramets at different development stages. Many of these sedges are important food for herbivores, yet differences in herbivore preferences and defence allocation between ramet development stages have not previously been evaluated. In this study we investigated intraclonal ramet variation in level of plant defence and nutrient compounds and intraclonal ramet preferences by lemmings (Lemmus trimucronatus) in field samples of a rhizomatous sedge (Carex stans). Plant defence was measured as the level of proteinase inhibitor activity (PIA) and the ratio of PIA to soluble plant proteins (SPP), whereas plant nutrients were measured as the level of soluble plant sugars (SPS) and SPP. Flowering ramets generally had a higher content of defence compared to vegetative ramets, which is consistent with the optimal defence theory predicting that defence compounds are allocated to the ramet stage of the highest fitness value. Compared to vegetative ramets, the flowering ramets had a lower content of SPP and a higher content of SPS. The lemmings showed preference differences between the ramet development stages, and to a large extent the ramet content of defence compounds and nutrient compounds covaried with these preferences in the predicted way. This study shows that defence allocation between ramet development stages of the clonal sedge Carex conforms to predictions of the optimal defence theory. |
format |
Article in Journal/Newspaper |
author |
Bråthen, KA Agrell, Jep Berteaux, D Jonsdottir, IS |
author_facet |
Bråthen, KA Agrell, Jep Berteaux, D Jonsdottir, IS |
author_sort |
Bråthen, KA |
title |
Intraclonal variation in defence substances and palatability: a study on Carex and lemmings |
title_short |
Intraclonal variation in defence substances and palatability: a study on Carex and lemmings |
title_full |
Intraclonal variation in defence substances and palatability: a study on Carex and lemmings |
title_fullStr |
Intraclonal variation in defence substances and palatability: a study on Carex and lemmings |
title_full_unstemmed |
Intraclonal variation in defence substances and palatability: a study on Carex and lemmings |
title_sort |
intraclonal variation in defence substances and palatability: a study on carex and lemmings |
publisher |
Wiley-Blackwell |
publishDate |
2004 |
url |
https://lup.lub.lu.se/record/137014 https://doi.org/10.1111/j.0030-1299.2004.12926.x https://portal.research.lu.se/files/2705600/624626.pdf |
genre |
Lemmus trimucronatus |
genre_facet |
Lemmus trimucronatus |
op_source |
Oikos; 105(3), pp 461-470 (2004) ISSN: 1600-0706 |
op_relation |
https://lup.lub.lu.se/record/137014 http://dx.doi.org/10.1111/j.0030-1299.2004.12926.x https://portal.research.lu.se/files/2705600/624626.pdf wos:000221438100002 scopus:3042595849 |
op_rights |
info:eu-repo/semantics/openAccess |
op_doi |
https://doi.org/10.1111/j.0030-1299.2004.12926.x |
container_title |
Oikos |
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105 |
container_issue |
3 |
container_start_page |
461 |
op_container_end_page |
470 |
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1766062899568050176 |