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Intraspecific convergence of floral size correlates with pollinator size on different mountains: a case study of a bumblebee-pollinated Lamium (Lamiaceae) flowers in Japan

BACKGROUND: Geographic differences in floral size sometimes reflect geographic differences in pollinator size. However, we know little about whether this floral size specialization to the regional pollinator size occurred independently at many places or occurred once and then spread across the distr...

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Autores principales: Toji, Tsubasa, Ishimoto, Natsumi, Egawa, Shin, Nakase, Yuta, Hattori, Mitsuru, Itino, Takao
Formato: Online Artículo Texto
Lenguaje:English
Publicado: BioMed Central 2021
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC8067403/
https://www.ncbi.nlm.nih.gov/pubmed/33894742
http://dx.doi.org/10.1186/s12862-021-01796-8
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author Toji, Tsubasa
Ishimoto, Natsumi
Egawa, Shin
Nakase, Yuta
Hattori, Mitsuru
Itino, Takao
author_facet Toji, Tsubasa
Ishimoto, Natsumi
Egawa, Shin
Nakase, Yuta
Hattori, Mitsuru
Itino, Takao
author_sort Toji, Tsubasa
collection PubMed
description BACKGROUND: Geographic differences in floral size sometimes reflect geographic differences in pollinator size. However, we know little about whether this floral size specialization to the regional pollinator size occurred independently at many places or occurred once and then spread across the distribution range of the plant species. RESULTS: We investigated the relationship between the local floral size of flowers and local pollinator size in 12 populations of Lamium album var. barbatum on two different mountains in the Japan Alps. Then, using 10 microsatellite markers, we analyzed genetic differentiation among the 12 populations. The results showed that local floral size was correlated with the average size of relevant morphological traits of the local pollinators: floral size was greater in populations visited frequently by the largest flower visitors, Bombus consobrinus queens, than it was in other populations. We also found that the degree of genetic similarity between populations more closely reflected interpopulation geographic proximity than interpopulation similarity in floral size. CONCLUSIONS: Although genetic similarity of populations was highly associated with geographic proximity, floral size varied independently of geographic proximity and was associated with local pollinator size. These results suggest that in L. album var. barbatum, large floral size evolved independently in populations on different mountains as a convergent adaptation to locally abundant large bumblebee species. SUPPLEMENTARY INFORMATION: The online version contains supplementary material available at 10.1186/s12862-021-01796-8.
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spelling pubmed-80674032021-04-26 Intraspecific convergence of floral size correlates with pollinator size on different mountains: a case study of a bumblebee-pollinated Lamium (Lamiaceae) flowers in Japan Toji, Tsubasa Ishimoto, Natsumi Egawa, Shin Nakase, Yuta Hattori, Mitsuru Itino, Takao BMC Ecol Evol Research BACKGROUND: Geographic differences in floral size sometimes reflect geographic differences in pollinator size. However, we know little about whether this floral size specialization to the regional pollinator size occurred independently at many places or occurred once and then spread across the distribution range of the plant species. RESULTS: We investigated the relationship between the local floral size of flowers and local pollinator size in 12 populations of Lamium album var. barbatum on two different mountains in the Japan Alps. Then, using 10 microsatellite markers, we analyzed genetic differentiation among the 12 populations. The results showed that local floral size was correlated with the average size of relevant morphological traits of the local pollinators: floral size was greater in populations visited frequently by the largest flower visitors, Bombus consobrinus queens, than it was in other populations. We also found that the degree of genetic similarity between populations more closely reflected interpopulation geographic proximity than interpopulation similarity in floral size. CONCLUSIONS: Although genetic similarity of populations was highly associated with geographic proximity, floral size varied independently of geographic proximity and was associated with local pollinator size. These results suggest that in L. album var. barbatum, large floral size evolved independently in populations on different mountains as a convergent adaptation to locally abundant large bumblebee species. SUPPLEMENTARY INFORMATION: The online version contains supplementary material available at 10.1186/s12862-021-01796-8. BioMed Central 2021-04-24 /pmc/articles/PMC8067403/ /pubmed/33894742 http://dx.doi.org/10.1186/s12862-021-01796-8 Text en © The Author(s) 2021 https://creativecommons.org/licenses/by/4.0/Open AccessThis article is licensed under a Creative Commons Attribution 4.0 International License, which permits use, sharing, adaptation, distribution and reproduction in any medium or format, as long as you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons licence, and indicate if changes were made. The images or other third party material in this article are included in the article's Creative Commons licence, unless indicated otherwise in a credit line to the material. If material is not included in the article's Creative Commons licence and your intended use is not permitted by statutory regulation or exceeds the permitted use, you will need to obtain permission directly from the copyright holder. To view a copy of this licence, visit http://creativecommons.org/licenses/by/4.0/ (https://creativecommons.org/licenses/by/4.0/) . The Creative Commons Public Domain Dedication waiver (http://creativecommons.org/publicdomain/zero/1.0/ (https://creativecommons.org/publicdomain/zero/1.0/) ) applies to the data made available in this article, unless otherwise stated in a credit line to the data.
spellingShingle Research
Toji, Tsubasa
Ishimoto, Natsumi
Egawa, Shin
Nakase, Yuta
Hattori, Mitsuru
Itino, Takao
Intraspecific convergence of floral size correlates with pollinator size on different mountains: a case study of a bumblebee-pollinated Lamium (Lamiaceae) flowers in Japan
title Intraspecific convergence of floral size correlates with pollinator size on different mountains: a case study of a bumblebee-pollinated Lamium (Lamiaceae) flowers in Japan
title_full Intraspecific convergence of floral size correlates with pollinator size on different mountains: a case study of a bumblebee-pollinated Lamium (Lamiaceae) flowers in Japan
title_fullStr Intraspecific convergence of floral size correlates with pollinator size on different mountains: a case study of a bumblebee-pollinated Lamium (Lamiaceae) flowers in Japan
title_full_unstemmed Intraspecific convergence of floral size correlates with pollinator size on different mountains: a case study of a bumblebee-pollinated Lamium (Lamiaceae) flowers in Japan
title_short Intraspecific convergence of floral size correlates with pollinator size on different mountains: a case study of a bumblebee-pollinated Lamium (Lamiaceae) flowers in Japan
title_sort intraspecific convergence of floral size correlates with pollinator size on different mountains: a case study of a bumblebee-pollinated lamium (lamiaceae) flowers in japan
topic Research
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC8067403/
https://www.ncbi.nlm.nih.gov/pubmed/33894742
http://dx.doi.org/10.1186/s12862-021-01796-8
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