Dormancy and germination of six Rhinanthus species in relation to climate
The genus Rhinanthus (Orobanchaceae) consists of annual hemiparasites that occur in a wide range of climates. Patterns of dormancy and germination were studied for six species sampled in areas ranging from the Pyrenees to Northern Scandinavia, and from sea level up to about 2500 m altitude in the Al...
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ftunivwagenin:oai:library.wur.nl:wurpubs/340932 2024-02-04T09:58:33+01:00 Dormancy and germination of six Rhinanthus species in relation to climate ter Borg, S.J. 2005 text/html https://research.wur.nl/en/publications/dormancy-and-germination-of-six-rhinanthus-species-in-relation-to https://doi.org/10.1007/bf02803238 en eng https://edepot.wur.nl/439303 https://research.wur.nl/en/publications/dormancy-and-germination-of-six-rhinanthus-species-in-relation-to doi:10.1007/bf02803238 info:eu-repo/semantics/restrictedAccess Wageningen University & Research Folia Geobotanica 40 (2005) 2/3 ISSN: 1211-9520 chalk-grassland demography ecology scrophulariaceae seed info:eu-repo/semantics/article Article/Letter to editor info:eu-repo/semantics/publishedVersion 2005 ftunivwagenin https://doi.org/10.1007/bf02803238 2024-01-10T23:25:58Z The genus Rhinanthus (Orobanchaceae) consists of annual hemiparasites that occur in a wide range of climates. Patterns of dormancy and germination were studied for six species sampled in areas ranging from the Pyrenees to Northern Scandinavia, and from sea level up to about 2500 m altitude in the Alpine region. Dormancy was broken by a 2 to 6 months period of cold stratification. Optimal temperature and length of the stratification period appeared to vary between and within species. Two patterns of dormancy and germination were distinguished. Seeds of the first group, including the widely distributed R. minor and R. angustifolius, further referred to as the LW group, require a relatively long period of cold stratification. Moreover, their germination is accelerated if they are subjected to a widening range of higher temperatures in the last weeks of the stratification period. In the other species (R. alectorolophus, R. glacialis, R. mediterraneus and perhaps R. antiquus) the release of dormancy is completed in a rather short period. Higher temperatures in the last weeks of the stratification period hardly affect the germination process of this SN-group, with short dormancy and no accelerated germination at higher temperatures. In both groups, temperatures above the low values during stratification reduce germination percentages and induce secondary dormancy in non-germinated seeds. The effects strongly vary with timing and temperature. The patterns have a genetic basis and seem to be species-specific. They do not vary with climate conditions, since samples R. minor, whether collected in sub-arctic or sub-alpine areas or at sea level, generally react according to the LW pattern, and samples of R. alectorolophus from areas at sea level up to montane regions according to the SN one. The ecological significance of the various stratification requirements and effects of higher temperatures on germination is discussed in relation to the local climate of the species and the evolutionary history of the genus. Article in Journal/Newspaper Arctic Wageningen UR (University & Research Centre): Digital Library Arctic Folia Geobotanica 40 2-3 243 260 |
institution |
Open Polar |
collection |
Wageningen UR (University & Research Centre): Digital Library |
op_collection_id |
ftunivwagenin |
language |
English |
topic |
chalk-grassland demography ecology scrophulariaceae seed |
spellingShingle |
chalk-grassland demography ecology scrophulariaceae seed ter Borg, S.J. Dormancy and germination of six Rhinanthus species in relation to climate |
topic_facet |
chalk-grassland demography ecology scrophulariaceae seed |
description |
The genus Rhinanthus (Orobanchaceae) consists of annual hemiparasites that occur in a wide range of climates. Patterns of dormancy and germination were studied for six species sampled in areas ranging from the Pyrenees to Northern Scandinavia, and from sea level up to about 2500 m altitude in the Alpine region. Dormancy was broken by a 2 to 6 months period of cold stratification. Optimal temperature and length of the stratification period appeared to vary between and within species. Two patterns of dormancy and germination were distinguished. Seeds of the first group, including the widely distributed R. minor and R. angustifolius, further referred to as the LW group, require a relatively long period of cold stratification. Moreover, their germination is accelerated if they are subjected to a widening range of higher temperatures in the last weeks of the stratification period. In the other species (R. alectorolophus, R. glacialis, R. mediterraneus and perhaps R. antiquus) the release of dormancy is completed in a rather short period. Higher temperatures in the last weeks of the stratification period hardly affect the germination process of this SN-group, with short dormancy and no accelerated germination at higher temperatures. In both groups, temperatures above the low values during stratification reduce germination percentages and induce secondary dormancy in non-germinated seeds. The effects strongly vary with timing and temperature. The patterns have a genetic basis and seem to be species-specific. They do not vary with climate conditions, since samples R. minor, whether collected in sub-arctic or sub-alpine areas or at sea level, generally react according to the LW pattern, and samples of R. alectorolophus from areas at sea level up to montane regions according to the SN one. The ecological significance of the various stratification requirements and effects of higher temperatures on germination is discussed in relation to the local climate of the species and the evolutionary history of the genus. |
format |
Article in Journal/Newspaper |
author |
ter Borg, S.J. |
author_facet |
ter Borg, S.J. |
author_sort |
ter Borg, S.J. |
title |
Dormancy and germination of six Rhinanthus species in relation to climate |
title_short |
Dormancy and germination of six Rhinanthus species in relation to climate |
title_full |
Dormancy and germination of six Rhinanthus species in relation to climate |
title_fullStr |
Dormancy and germination of six Rhinanthus species in relation to climate |
title_full_unstemmed |
Dormancy and germination of six Rhinanthus species in relation to climate |
title_sort |
dormancy and germination of six rhinanthus species in relation to climate |
publishDate |
2005 |
url |
https://research.wur.nl/en/publications/dormancy-and-germination-of-six-rhinanthus-species-in-relation-to https://doi.org/10.1007/bf02803238 |
geographic |
Arctic |
geographic_facet |
Arctic |
genre |
Arctic |
genre_facet |
Arctic |
op_source |
Folia Geobotanica 40 (2005) 2/3 ISSN: 1211-9520 |
op_relation |
https://edepot.wur.nl/439303 https://research.wur.nl/en/publications/dormancy-and-germination-of-six-rhinanthus-species-in-relation-to doi:10.1007/bf02803238 |
op_rights |
info:eu-repo/semantics/restrictedAccess Wageningen University & Research |
op_doi |
https://doi.org/10.1007/bf02803238 |
container_title |
Folia Geobotanica |
container_volume |
40 |
container_issue |
2-3 |
container_start_page |
243 |
op_container_end_page |
260 |
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1789963002404929536 |