Constraints on sexual reproduction and seed set in Vaccinium and Campanula
Abstract Plant reproductive success is affected by a number of factors, such as climatic conditions and plant resource status during flowering and fruiting, and pollen origin in fertilization. In the present thesis project, different aspects of plant reproductive ecology were investigated in order t...
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University of Oulu
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ftunivoulu:oai:oulu.fi:isbn978-951-42-8500-4 2023-07-30T04:02:47+02:00 Constraints on sexual reproduction and seed set in Vaccinium and Campanula Nuortila, C. (Carolin) 2007-06-05 application/pdf http://urn.fi/urn:isbn:9789514285004 eng eng University of Oulu info:eu-repo/semantics/altIdentifier/pissn/0355-3191 info:eu-repo/semantics/altIdentifier/eissn/1796-220X info:eu-repo/semantics/openAccess © University of Oulu, 2007 Ericaceae Vaccinium autofertility flowering phenology inbreeding depression reproductive success self-fertility Campanula info:eu-repo/semantics/doctoralThesis info:eu-repo/semantics/publishedVersion 2007 ftunivoulu 2023-07-08T20:01:34Z Abstract Plant reproductive success is affected by a number of factors, such as climatic conditions and plant resource status during flowering and fruiting, and pollen origin in fertilization. In the present thesis project, different aspects of plant reproductive ecology were investigated in order to identify constraints on sexual reproduction and seed set in two clonal dwarf shrubs (Vaccinium myrtillus and V. vitis-idaea) and one long-lived perennial herb (Campanula rotundifolia). The work comprised phenological observations and experiments with the clonal shrubs at natural boreal forest sites in the Oulanka National Park in northern Finland. The impact of mycorrhiza on C. rotundifolia fitness traits was tested in hand pollinations in a greenhouse experiment. Pollen origin had some effect on fruit set, and had strong effects on the number of matured seeds in all three species. Seed yield reductions upon hand self-pollination as compared with hand cross-pollination were attributed to inbreeding depression in V. myrtillus, and presumably to partial self-incompatibility in C. rotundifolia. V. myrtillus and V. vitis-idaea showed a population structure where the number of matured seeds per fruit increased with increasing distance between pollen donor and pollen recipient. Clonal growth in concert with the foraging behaviour of bumblebee pollinators is thought to cause the possibility of either uniparental or biparental inbreeding, with a strong effect on the number of matured seeds per berry. In a flower-removal experiment lasting three years, costs of fruiting to future fecundity and vegetative traits were observed, but not to future survival in V. vitis-idaea and V. myrtillus. The response was more pronounced in the evergreen than in the deciduous species. In Campanula rotundifolia, mycorrhiza was associated with a cost to the plants’ reproductive effort, as plant biomass and the number of flowers produced per plant were decreased in mycorrhizal plants in comparison with non-mycorrhizal plants. There was no ... Doctoral or Postdoctoral Thesis Campanula rotundifolia Northern Finland Jultika - University of Oulu repository Oulanka ENVELOPE(28.986,28.986,66.455,66.455) |
institution |
Open Polar |
collection |
Jultika - University of Oulu repository |
op_collection_id |
ftunivoulu |
language |
English |
topic |
Ericaceae Vaccinium autofertility flowering phenology inbreeding depression reproductive success self-fertility Campanula |
spellingShingle |
Ericaceae Vaccinium autofertility flowering phenology inbreeding depression reproductive success self-fertility Campanula Nuortila, C. (Carolin) Constraints on sexual reproduction and seed set in Vaccinium and Campanula |
topic_facet |
Ericaceae Vaccinium autofertility flowering phenology inbreeding depression reproductive success self-fertility Campanula |
description |
Abstract Plant reproductive success is affected by a number of factors, such as climatic conditions and plant resource status during flowering and fruiting, and pollen origin in fertilization. In the present thesis project, different aspects of plant reproductive ecology were investigated in order to identify constraints on sexual reproduction and seed set in two clonal dwarf shrubs (Vaccinium myrtillus and V. vitis-idaea) and one long-lived perennial herb (Campanula rotundifolia). The work comprised phenological observations and experiments with the clonal shrubs at natural boreal forest sites in the Oulanka National Park in northern Finland. The impact of mycorrhiza on C. rotundifolia fitness traits was tested in hand pollinations in a greenhouse experiment. Pollen origin had some effect on fruit set, and had strong effects on the number of matured seeds in all three species. Seed yield reductions upon hand self-pollination as compared with hand cross-pollination were attributed to inbreeding depression in V. myrtillus, and presumably to partial self-incompatibility in C. rotundifolia. V. myrtillus and V. vitis-idaea showed a population structure where the number of matured seeds per fruit increased with increasing distance between pollen donor and pollen recipient. Clonal growth in concert with the foraging behaviour of bumblebee pollinators is thought to cause the possibility of either uniparental or biparental inbreeding, with a strong effect on the number of matured seeds per berry. In a flower-removal experiment lasting three years, costs of fruiting to future fecundity and vegetative traits were observed, but not to future survival in V. vitis-idaea and V. myrtillus. The response was more pronounced in the evergreen than in the deciduous species. In Campanula rotundifolia, mycorrhiza was associated with a cost to the plants’ reproductive effort, as plant biomass and the number of flowers produced per plant were decreased in mycorrhizal plants in comparison with non-mycorrhizal plants. There was no ... |
format |
Doctoral or Postdoctoral Thesis |
author |
Nuortila, C. (Carolin) |
author_facet |
Nuortila, C. (Carolin) |
author_sort |
Nuortila, C. (Carolin) |
title |
Constraints on sexual reproduction and seed set in Vaccinium and Campanula |
title_short |
Constraints on sexual reproduction and seed set in Vaccinium and Campanula |
title_full |
Constraints on sexual reproduction and seed set in Vaccinium and Campanula |
title_fullStr |
Constraints on sexual reproduction and seed set in Vaccinium and Campanula |
title_full_unstemmed |
Constraints on sexual reproduction and seed set in Vaccinium and Campanula |
title_sort |
constraints on sexual reproduction and seed set in vaccinium and campanula |
publisher |
University of Oulu |
publishDate |
2007 |
url |
http://urn.fi/urn:isbn:9789514285004 |
long_lat |
ENVELOPE(28.986,28.986,66.455,66.455) |
geographic |
Oulanka |
geographic_facet |
Oulanka |
genre |
Campanula rotundifolia Northern Finland |
genre_facet |
Campanula rotundifolia Northern Finland |
op_relation |
info:eu-repo/semantics/altIdentifier/pissn/0355-3191 info:eu-repo/semantics/altIdentifier/eissn/1796-220X |
op_rights |
info:eu-repo/semantics/openAccess © University of Oulu, 2007 |
_version_ |
1772813608821981184 |