Dressed for the occasion! Ecotypic divergence, phenotypic plasticity and taxonomic value of capitulum characters of Scorzoneroides autumnalis (Asteraceae)
Scorzoneroides autumnalis is a highly polymorphic perennial with several described infraspecific taxa, largely differing in involucre colour and indumentum intensity. Here, we examine the role of ecotypic divergence and phenotypic plasticity in shaping large-scale geographical variation in these cha...
Published in: | Nordic Journal of Botany |
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Language: | English |
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Wiley-Blackwell
2024
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Online Access: | https://lup.lub.lu.se/record/08729af9-6253-4bc9-8554-185b6a46645b https://doi.org/10.1111/njb.04211 |
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ftulundlup:oai:lup.lub.lu.se:08729af9-6253-4bc9-8554-185b6a46645b 2024-04-28T08:26:05+00:00 Dressed for the occasion! Ecotypic divergence, phenotypic plasticity and taxonomic value of capitulum characters of Scorzoneroides autumnalis (Asteraceae) Ingimundardóttir, Gróa Valgerður Tyler, Torbjörn Cronberg, Nils Hedrén, Mikael Andersson, Stefan 2024 https://lup.lub.lu.se/record/08729af9-6253-4bc9-8554-185b6a46645b https://doi.org/10.1111/njb.04211 eng eng Wiley-Blackwell https://lup.lub.lu.se/record/08729af9-6253-4bc9-8554-185b6a46645b http://dx.doi.org/10.1111/njb.04211 scopus:85187519627 Nordic Journal of Botany; (2024) ISSN: 0107-055X Botany Asteraceae climate chamber common garden ecotype herbarium material indumentum inflorescence infraspecific variation involucre local adaptation morphology phenotypic plasticity Scorzoneroides autumnalis taxonomy contributiontojournal/article info:eu-repo/semantics/article text 2024 ftulundlup https://doi.org/10.1111/njb.04211 2024-04-09T23:55:45Z Scorzoneroides autumnalis is a highly polymorphic perennial with several described infraspecific taxa, largely differing in involucre colour and indumentum intensity. Here, we examine the role of ecotypic divergence and phenotypic plasticity in shaping large-scale geographical variation in these characters. We collected phenotypic data from herbarium specimens and garden-grown plants of S. autumnalis, representing several habitats throughout Scandinavia and Iceland, and subjected progenies from controlled crosses within a subset of the common garden material to different temperature regimes to assess patterns of phenotypic plasticity. Our results strongly suggest that colour and indumentum of involucral bracts, as well as the size of capitula (measured by ligule length), are environmentally plastic and much affected by temperature. Reduced temperature resulted in significantly larger capitula, with both thicker and darker involucre indumentum. Since dark colouration, dense indumentum and large floral structures have been shown to facilitate heat retention and insect visitation in other plant species growing in cold climate, we hypothesize that plants of S. autumnalis benefit from possessing these features under cool conditions, and that much of the geographical variation in capitulum characters reflects adaptive phenotypic plasticity rather than ecotypic divergence. For this reason, we deem these characters to have a low taxonomic value for distinguishing infraspecific taxa within S. autumnalis. Article in Journal/Newspaper Iceland Lund University Publications (LUP) Nordic Journal of Botany |
institution |
Open Polar |
collection |
Lund University Publications (LUP) |
op_collection_id |
ftulundlup |
language |
English |
topic |
Botany Asteraceae climate chamber common garden ecotype herbarium material indumentum inflorescence infraspecific variation involucre local adaptation morphology phenotypic plasticity Scorzoneroides autumnalis taxonomy |
spellingShingle |
Botany Asteraceae climate chamber common garden ecotype herbarium material indumentum inflorescence infraspecific variation involucre local adaptation morphology phenotypic plasticity Scorzoneroides autumnalis taxonomy Ingimundardóttir, Gróa Valgerður Tyler, Torbjörn Cronberg, Nils Hedrén, Mikael Andersson, Stefan Dressed for the occasion! Ecotypic divergence, phenotypic plasticity and taxonomic value of capitulum characters of Scorzoneroides autumnalis (Asteraceae) |
topic_facet |
Botany Asteraceae climate chamber common garden ecotype herbarium material indumentum inflorescence infraspecific variation involucre local adaptation morphology phenotypic plasticity Scorzoneroides autumnalis taxonomy |
description |
Scorzoneroides autumnalis is a highly polymorphic perennial with several described infraspecific taxa, largely differing in involucre colour and indumentum intensity. Here, we examine the role of ecotypic divergence and phenotypic plasticity in shaping large-scale geographical variation in these characters. We collected phenotypic data from herbarium specimens and garden-grown plants of S. autumnalis, representing several habitats throughout Scandinavia and Iceland, and subjected progenies from controlled crosses within a subset of the common garden material to different temperature regimes to assess patterns of phenotypic plasticity. Our results strongly suggest that colour and indumentum of involucral bracts, as well as the size of capitula (measured by ligule length), are environmentally plastic and much affected by temperature. Reduced temperature resulted in significantly larger capitula, with both thicker and darker involucre indumentum. Since dark colouration, dense indumentum and large floral structures have been shown to facilitate heat retention and insect visitation in other plant species growing in cold climate, we hypothesize that plants of S. autumnalis benefit from possessing these features under cool conditions, and that much of the geographical variation in capitulum characters reflects adaptive phenotypic plasticity rather than ecotypic divergence. For this reason, we deem these characters to have a low taxonomic value for distinguishing infraspecific taxa within S. autumnalis. |
format |
Article in Journal/Newspaper |
author |
Ingimundardóttir, Gróa Valgerður Tyler, Torbjörn Cronberg, Nils Hedrén, Mikael Andersson, Stefan |
author_facet |
Ingimundardóttir, Gróa Valgerður Tyler, Torbjörn Cronberg, Nils Hedrén, Mikael Andersson, Stefan |
author_sort |
Ingimundardóttir, Gróa Valgerður |
title |
Dressed for the occasion! Ecotypic divergence, phenotypic plasticity and taxonomic value of capitulum characters of Scorzoneroides autumnalis (Asteraceae) |
title_short |
Dressed for the occasion! Ecotypic divergence, phenotypic plasticity and taxonomic value of capitulum characters of Scorzoneroides autumnalis (Asteraceae) |
title_full |
Dressed for the occasion! Ecotypic divergence, phenotypic plasticity and taxonomic value of capitulum characters of Scorzoneroides autumnalis (Asteraceae) |
title_fullStr |
Dressed for the occasion! Ecotypic divergence, phenotypic plasticity and taxonomic value of capitulum characters of Scorzoneroides autumnalis (Asteraceae) |
title_full_unstemmed |
Dressed for the occasion! Ecotypic divergence, phenotypic plasticity and taxonomic value of capitulum characters of Scorzoneroides autumnalis (Asteraceae) |
title_sort |
dressed for the occasion! ecotypic divergence, phenotypic plasticity and taxonomic value of capitulum characters of scorzoneroides autumnalis (asteraceae) |
publisher |
Wiley-Blackwell |
publishDate |
2024 |
url |
https://lup.lub.lu.se/record/08729af9-6253-4bc9-8554-185b6a46645b https://doi.org/10.1111/njb.04211 |
genre |
Iceland |
genre_facet |
Iceland |
op_source |
Nordic Journal of Botany; (2024) ISSN: 0107-055X |
op_relation |
https://lup.lub.lu.se/record/08729af9-6253-4bc9-8554-185b6a46645b http://dx.doi.org/10.1111/njb.04211 scopus:85187519627 |
op_doi |
https://doi.org/10.1111/njb.04211 |
container_title |
Nordic Journal of Botany |
_version_ |
1797585615090352128 |