The influence of hybridization on epidermal properties of birch species and the consequences for palaeoclimatic interpretations
The Fennoscandian birch population primarily consists of Betula nana, B. pendula and B. pubescens ssp. czerepanovii, the Mountain birch. Frequent hybridization between the Mountain birch and B. nana generates a wide range of genotypic and phenotypic plasticity in the subarctic birch zone of Fennosca...
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ftunivutrecht:oai:dspace.library.uu.nl:1874/20768 2023-07-23T04:18:37+02:00 The influence of hybridization on epidermal properties of birch species and the consequences for palaeoclimatic interpretations Wagner, F. Kürschner, W.M. Neuvonen, S. Visscher, H. 2000 text/plain https://dspace.library.uu.nl/handle/1874/20768 en eng https://dspace.library.uu.nl/handle/1874/20768 info:eu-repo/semantics/OpenAccess Biologie Epidermal properties Birch hybridization Stomatal index Stomatal density Palaeoatmospheric CO2 Article 2000 ftunivutrecht 2023-07-01T23:17:38Z The Fennoscandian birch population primarily consists of Betula nana, B. pendula and B. pubescens ssp. czerepanovii, the Mountain birch. Frequent hybridization between the Mountain birch and B. nana generates a wide range of genotypic and phenotypic plasticity in the subarctic birch zone of Fennoscandia. Phases of subarctic conditions prevailed during the Late Glacial in large parts of NW - Europe, and palynological as well as macrofossil analysis provide some evidence for the occurrence of birch hybrids during these intervals. Leaves from genetically controlled specimens of Betula pendula, B. pubescens ssp. czerepanovii, B. nana and the hybrids B. pubescens ssp. czerepanovii x nana and B. nana x pubescens ssp. czerepanovii are investigated for their specific characteristics of the epidermis morphology. Frequency and size of epidermal cells and stomata reveal a close affinity of both hybrids to B. nana and allow a differentiation of the intermediate forms between B. nana and the Mountain birch. With respect to palaeoatmospheric CO2 reconstructions based on stomatal index, epidermal analysis shows that a possible occurrence of hybrids in fossil leaf assemblages has no profound consequences for combined species records. However, the significant differences observed in B. nana demand the separation of this species. A comparison of the cuticle properties of B. pendula and B. pubescens from Finnish Lappland and leaf material from The Netherlands reveals a divergence of the stomatal index that may be due to differences in day light length. Article in Journal/Newspaper Betula nana Fennoscandia Fennoscandian Lappland Subarctic Utrecht University Repository Lappland ENVELOPE(18.067,18.067,65.900,65.900) |
institution |
Open Polar |
collection |
Utrecht University Repository |
op_collection_id |
ftunivutrecht |
language |
English |
topic |
Biologie Epidermal properties Birch hybridization Stomatal index Stomatal density Palaeoatmospheric CO2 |
spellingShingle |
Biologie Epidermal properties Birch hybridization Stomatal index Stomatal density Palaeoatmospheric CO2 Wagner, F. Kürschner, W.M. Neuvonen, S. Visscher, H. The influence of hybridization on epidermal properties of birch species and the consequences for palaeoclimatic interpretations |
topic_facet |
Biologie Epidermal properties Birch hybridization Stomatal index Stomatal density Palaeoatmospheric CO2 |
description |
The Fennoscandian birch population primarily consists of Betula nana, B. pendula and B. pubescens ssp. czerepanovii, the Mountain birch. Frequent hybridization between the Mountain birch and B. nana generates a wide range of genotypic and phenotypic plasticity in the subarctic birch zone of Fennoscandia. Phases of subarctic conditions prevailed during the Late Glacial in large parts of NW - Europe, and palynological as well as macrofossil analysis provide some evidence for the occurrence of birch hybrids during these intervals. Leaves from genetically controlled specimens of Betula pendula, B. pubescens ssp. czerepanovii, B. nana and the hybrids B. pubescens ssp. czerepanovii x nana and B. nana x pubescens ssp. czerepanovii are investigated for their specific characteristics of the epidermis morphology. Frequency and size of epidermal cells and stomata reveal a close affinity of both hybrids to B. nana and allow a differentiation of the intermediate forms between B. nana and the Mountain birch. With respect to palaeoatmospheric CO2 reconstructions based on stomatal index, epidermal analysis shows that a possible occurrence of hybrids in fossil leaf assemblages has no profound consequences for combined species records. However, the significant differences observed in B. nana demand the separation of this species. A comparison of the cuticle properties of B. pendula and B. pubescens from Finnish Lappland and leaf material from The Netherlands reveals a divergence of the stomatal index that may be due to differences in day light length. |
format |
Article in Journal/Newspaper |
author |
Wagner, F. Kürschner, W.M. Neuvonen, S. Visscher, H. |
author_facet |
Wagner, F. Kürschner, W.M. Neuvonen, S. Visscher, H. |
author_sort |
Wagner, F. |
title |
The influence of hybridization on epidermal properties of birch species and the consequences for palaeoclimatic interpretations |
title_short |
The influence of hybridization on epidermal properties of birch species and the consequences for palaeoclimatic interpretations |
title_full |
The influence of hybridization on epidermal properties of birch species and the consequences for palaeoclimatic interpretations |
title_fullStr |
The influence of hybridization on epidermal properties of birch species and the consequences for palaeoclimatic interpretations |
title_full_unstemmed |
The influence of hybridization on epidermal properties of birch species and the consequences for palaeoclimatic interpretations |
title_sort |
influence of hybridization on epidermal properties of birch species and the consequences for palaeoclimatic interpretations |
publishDate |
2000 |
url |
https://dspace.library.uu.nl/handle/1874/20768 |
long_lat |
ENVELOPE(18.067,18.067,65.900,65.900) |
geographic |
Lappland |
geographic_facet |
Lappland |
genre |
Betula nana Fennoscandia Fennoscandian Lappland Subarctic |
genre_facet |
Betula nana Fennoscandia Fennoscandian Lappland Subarctic |
op_relation |
https://dspace.library.uu.nl/handle/1874/20768 |
op_rights |
info:eu-repo/semantics/OpenAccess |
_version_ |
1772181051893874688 |