Prezygotic resource-allocation dynamics and reproductive trade-offs in calymperaceae (Bryophyta)
PREMISE OF THE STUDY: Resource allocation is difficult to characterize in plants because of the challenges of quantifying gametes and propagules. We surveyed six sympatric, unisexual species in the family Calymperaceae (Bryophyta) to test for trade-offs in prezygotic sexual and asexual expression an...
| Autor principal: | Pereira, Marta Regina Silva |
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| Outros Autores: | Sales Dambros, Cristian de, Zartman, Charles Eugene |
| Grau: | Artigo |
| Idioma: | English |
| Publicado em: |
American Journal of Botany
2020
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| Acesso em linha: |
https://repositorio.inpa.gov.br/handle/1/15793 |
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oai:repositorio:1-15793 |
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oai:repositorio:1-15793 Prezygotic resource-allocation dynamics and reproductive trade-offs in calymperaceae (Bryophyta) Pereira, Marta Regina Silva Sales Dambros, Cristian de Zartman, Charles Eugene Gamete Moss Propagule Rainforest Reproductive Behavior Resource Allocation Senescence Sporophyte Survivorship Trade-off Amazonia Bryophyta Calymperaceae Reproduction, Asexual Brasil Bryopsida Evolution Physiology Rainforest Reproduction Season Species Difference Biological Evolution Brasil Bryopsida Rainforest Reproduction Reproduction, Asexual Seasons Species Specificity PREMISE OF THE STUDY: Resource allocation is difficult to characterize in plants because of the challenges of quantifying gametes and propagules. We surveyed six sympatric, unisexual species in the family Calymperaceae (Bryophyta) to test for trade-offs in prezygotic sexual and asexual expression and density-dependent survivorship of female gametangia. METHODS: We tallied gametangial and asexual propagule output for 1820 shoots from 17 populations of six species at monthly intervals during one year (2010–2011) in a central Amazonian forest. Generalized linear mixed models were used to test for trade-offs in sexual and asexual expression and density-dependent senescence probability of gametangia. Precipitation and microsite variables were also included in the model. KEY RESULTS: For all species, sexual and asexual expression were positively correlated with mean monthly precipitation. Asexually expressing shoots produced significantly fewer gametangia than nonexpressing ones, and the probability of senescence increased with shoot density. Archegonium density per shoot was also consistently lower than the modeled optimum to maximize the number of receptive archegonia. CONCLUSIONS: Trade-offs among reproductive strategies and positive density-dependent senescence of female gametangia suggest that prezygotic sexual and asexual expression come at a tangible investment. However, the apparently inefficient resource-allocation dynamics in the production of female gametangia makes the possible advantages of squandering such investments unclear. One possibility is that the study populations, like those of many dioicous mosses, are skewed toward expressing females with low sporophyte production, which would suggest that asexual reproduction predominates and upstages efficient resource allocation in prezygotic investment. © 2016 Botanical Society of America. 2020-05-18T21:21:05Z 2020-05-18T21:21:05Z 2016 Artigo https://repositorio.inpa.gov.br/handle/1/15793 10.3732/ajb.1600240 en Volume 103, Número 10, Pags. 1838-1846 Attribution-NonCommercial-NoDerivs 3.0 Brazil http://creativecommons.org/licenses/by-nc-nd/3.0/br/ application/pdf American Journal of Botany |
| institution |
Instituto Nacional de Pesquisas da Amazônia - Repositório Institucional |
| collection |
INPA-RI |
| language |
English |
| topic |
Gamete Moss Propagule Rainforest Reproductive Behavior Resource Allocation Senescence Sporophyte Survivorship Trade-off Amazonia Bryophyta Calymperaceae Reproduction, Asexual Brasil Bryopsida Evolution Physiology Rainforest Reproduction Season Species Difference Biological Evolution Brasil Bryopsida Rainforest Reproduction Reproduction, Asexual Seasons Species Specificity |
| spellingShingle |
Gamete Moss Propagule Rainforest Reproductive Behavior Resource Allocation Senescence Sporophyte Survivorship Trade-off Amazonia Bryophyta Calymperaceae Reproduction, Asexual Brasil Bryopsida Evolution Physiology Rainforest Reproduction Season Species Difference Biological Evolution Brasil Bryopsida Rainforest Reproduction Reproduction, Asexual Seasons Species Specificity Pereira, Marta Regina Silva Prezygotic resource-allocation dynamics and reproductive trade-offs in calymperaceae (Bryophyta) |
| topic_facet |
Gamete Moss Propagule Rainforest Reproductive Behavior Resource Allocation Senescence Sporophyte Survivorship Trade-off Amazonia Bryophyta Calymperaceae Reproduction, Asexual Brasil Bryopsida Evolution Physiology Rainforest Reproduction Season Species Difference Biological Evolution Brasil Bryopsida Rainforest Reproduction Reproduction, Asexual Seasons Species Specificity |
| description |
PREMISE OF THE STUDY: Resource allocation is difficult to characterize in plants because of the challenges of quantifying gametes and propagules. We surveyed six sympatric, unisexual species in the family Calymperaceae (Bryophyta) to test for trade-offs in prezygotic sexual and asexual expression and density-dependent survivorship of female gametangia. METHODS: We tallied gametangial and asexual propagule output for 1820 shoots from 17 populations of six species at monthly intervals during one year (2010–2011) in a central Amazonian forest. Generalized linear mixed models were used to test for trade-offs in sexual and asexual expression and density-dependent senescence probability of gametangia. Precipitation and microsite variables were also included in the model. KEY RESULTS: For all species, sexual and asexual expression were positively correlated with mean monthly precipitation. Asexually expressing shoots produced significantly fewer gametangia than nonexpressing ones, and the probability of senescence increased with shoot density. Archegonium density per shoot was also consistently lower than the modeled optimum to maximize the number of receptive archegonia. CONCLUSIONS: Trade-offs among reproductive strategies and positive density-dependent senescence of female gametangia suggest that prezygotic sexual and asexual expression come at a tangible investment. However, the apparently inefficient resource-allocation dynamics in the production of female gametangia makes the possible advantages of squandering such investments unclear. One possibility is that the study populations, like those of many dioicous mosses, are skewed toward expressing females with low sporophyte production, which would suggest that asexual reproduction predominates and upstages efficient resource allocation in prezygotic investment. © 2016 Botanical Society of America. |
| format |
Artigo |
| author |
Pereira, Marta Regina Silva |
| author2 |
Sales Dambros, Cristian de Zartman, Charles Eugene |
| author2Str |
Sales Dambros, Cristian de Zartman, Charles Eugene |
| title |
Prezygotic resource-allocation dynamics and reproductive trade-offs in calymperaceae (Bryophyta) |
| title_short |
Prezygotic resource-allocation dynamics and reproductive trade-offs in calymperaceae (Bryophyta) |
| title_full |
Prezygotic resource-allocation dynamics and reproductive trade-offs in calymperaceae (Bryophyta) |
| title_fullStr |
Prezygotic resource-allocation dynamics and reproductive trade-offs in calymperaceae (Bryophyta) |
| title_full_unstemmed |
Prezygotic resource-allocation dynamics and reproductive trade-offs in calymperaceae (Bryophyta) |
| title_sort |
prezygotic resource-allocation dynamics and reproductive trade-offs in calymperaceae (bryophyta) |
| publisher |
American Journal of Botany |
| publishDate |
2020 |
| url |
https://repositorio.inpa.gov.br/handle/1/15793 |
| _version_ |
1787142751141232640 |
| score |
11.755432 |