Reproductive system and population structure in three arctic Saxifraga species
Saxifraga cespitosa, S. tenuis and S. cernua were examined in the Abisko area, N Sweden. Populations of S. cespitosa were gynodioecious. Hermaphrodite individuals showed a high selfing efficiency and low pollen:ovule ratios, consistent with a lower outbreeding rate. Saxifraa tenuis was hermaphrodite...
Published in: | The Journal of Ecology |
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Wiley-Blackwell
1992
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Online Access: | https://lup.lub.lu.se/record/c30aae91-64ee-4dbd-83da-d9d6e17aae90 https://doi.org/10.2307/2261072 |
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ftulundlup:oai:lup.lub.lu.se:c30aae91-64ee-4dbd-83da-d9d6e17aae90 2023-05-15T12:59:40+02:00 Reproductive system and population structure in three arctic Saxifraga species Molau, U. Prentice, Honor C 1992 https://lup.lub.lu.se/record/c30aae91-64ee-4dbd-83da-d9d6e17aae90 https://doi.org/10.2307/2261072 eng eng Wiley-Blackwell https://lup.lub.lu.se/record/c30aae91-64ee-4dbd-83da-d9d6e17aae90 http://dx.doi.org/10.2307/2261072 scopus:0026526590 Journal of Ecology; 80(1), pp 149-161 (1992) ISSN: 0022-0477 Ecology contributiontojournal/article info:eu-repo/semantics/article text 1992 ftulundlup https://doi.org/10.2307/2261072 2023-02-01T23:39:12Z Saxifraga cespitosa, S. tenuis and S. cernua were examined in the Abisko area, N Sweden. Populations of S. cespitosa were gynodioecious. Hermaphrodite individuals showed a high selfing efficiency and low pollen:ovule ratios, consistent with a lower outbreeding rate. Saxifraa tenuis was hermaphrodite with some indication of sexual asymmetry. Pollen:ovule ratios were low, but the ability to set seed by autodeposition was lower in S. tenuis than in S. cespitosa. Saxifraga cernua was androdioecious, with some populations that contained only female-sterile individuals and other populations with both female-sterile and hermaphrodite individuals. The higher production of bulbils by female-sterile individuals, coupled with self-incompatibility in hermaphrodites, suggests a means by which androdioecy may be maintained in S. cernua, in the absence of differences in male reproductive success between gender classes. Although all three species showed significant inter-population differentiation, the morphometric distances between populations were not related to the geographic distances between populations. Most of the total diversity in leaf shape was accounted for by inter-population differentiation in all three species, with <1% of the diversity due to variation within individuals. The mosaic pattern of variation in the three saxifrages is consistent with a scenario of localized founder effect and may still reflect patterns of recruitment after the deglaciation of the study area c8200BP. -from Authors Article in Journal/Newspaper Abisko Arctic Saxifraga cernua Saxifraga cespitosa Lund University Publications (LUP) Arctic Abisko ENVELOPE(18.829,18.829,68.349,68.349) The Journal of Ecology 80 1 149 |
institution |
Open Polar |
collection |
Lund University Publications (LUP) |
op_collection_id |
ftulundlup |
language |
English |
topic |
Ecology |
spellingShingle |
Ecology Molau, U. Prentice, Honor C Reproductive system and population structure in three arctic Saxifraga species |
topic_facet |
Ecology |
description |
Saxifraga cespitosa, S. tenuis and S. cernua were examined in the Abisko area, N Sweden. Populations of S. cespitosa were gynodioecious. Hermaphrodite individuals showed a high selfing efficiency and low pollen:ovule ratios, consistent with a lower outbreeding rate. Saxifraa tenuis was hermaphrodite with some indication of sexual asymmetry. Pollen:ovule ratios were low, but the ability to set seed by autodeposition was lower in S. tenuis than in S. cespitosa. Saxifraga cernua was androdioecious, with some populations that contained only female-sterile individuals and other populations with both female-sterile and hermaphrodite individuals. The higher production of bulbils by female-sterile individuals, coupled with self-incompatibility in hermaphrodites, suggests a means by which androdioecy may be maintained in S. cernua, in the absence of differences in male reproductive success between gender classes. Although all three species showed significant inter-population differentiation, the morphometric distances between populations were not related to the geographic distances between populations. Most of the total diversity in leaf shape was accounted for by inter-population differentiation in all three species, with <1% of the diversity due to variation within individuals. The mosaic pattern of variation in the three saxifrages is consistent with a scenario of localized founder effect and may still reflect patterns of recruitment after the deglaciation of the study area c8200BP. -from Authors |
format |
Article in Journal/Newspaper |
author |
Molau, U. Prentice, Honor C |
author_facet |
Molau, U. Prentice, Honor C |
author_sort |
Molau, U. |
title |
Reproductive system and population structure in three arctic Saxifraga species |
title_short |
Reproductive system and population structure in three arctic Saxifraga species |
title_full |
Reproductive system and population structure in three arctic Saxifraga species |
title_fullStr |
Reproductive system and population structure in three arctic Saxifraga species |
title_full_unstemmed |
Reproductive system and population structure in three arctic Saxifraga species |
title_sort |
reproductive system and population structure in three arctic saxifraga species |
publisher |
Wiley-Blackwell |
publishDate |
1992 |
url |
https://lup.lub.lu.se/record/c30aae91-64ee-4dbd-83da-d9d6e17aae90 https://doi.org/10.2307/2261072 |
long_lat |
ENVELOPE(18.829,18.829,68.349,68.349) |
geographic |
Arctic Abisko |
geographic_facet |
Arctic Abisko |
genre |
Abisko Arctic Saxifraga cernua Saxifraga cespitosa |
genre_facet |
Abisko Arctic Saxifraga cernua Saxifraga cespitosa |
op_source |
Journal of Ecology; 80(1), pp 149-161 (1992) ISSN: 0022-0477 |
op_relation |
https://lup.lub.lu.se/record/c30aae91-64ee-4dbd-83da-d9d6e17aae90 http://dx.doi.org/10.2307/2261072 scopus:0026526590 |
op_doi |
https://doi.org/10.2307/2261072 |
container_title |
The Journal of Ecology |
container_volume |
80 |
container_issue |
1 |
container_start_page |
149 |
_version_ |
1766075446023159808 |