Longevity and germination of Syagrus romanzoffiana (Arecaceae) seeds and its ecological implications
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| Format: | Artículo científico |
| Language: | en |
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Universidad de Costa Rica
2015
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| _version_ | 1876441131518001152 |
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| author | Túlio Gabriel Soares Oliveira |
| author_facet | Túlio Gabriel Soares Oliveira |
| contents | Longevity and germination of Syagrus romanzoffiana (Arecaceae) seeds and its ecological implications Túlio Gabriel Soares Oliveira José Anderson Cleiton Leonardo Monteiro Ribeiro José Marcio Rocha Faria Biología Palm tree viability seed bank queen palm seed storage Syagrus romanzoffiana is a palm tree native and widely distributed of South America. The present study investigated the longevity and germination of the buried seeds of this species in an experimental seed bank. Laboratory germination and viability tests were performed for comparison with field results. Pyrenes (seeds enclosed by the endocarp) were buried in a forest fragment edge in July 2012 (dry season) and exhumed monthly during one year, for the assessment of water content and percentage of germinated and viable seeds. Germination tests were conducted in a Mangelsdorf-type germinator at 30°C under constant light and the viabil - ity was assessed by the tetrazolium test. An additional sample of pyrenes was buried to evaluate the percentage of seedling emergence and survival. Climatic and soil moisture data were recorded. In the laboratory, the pyrenes were stored for one year in a temperature-controlled room at 20ºC and 75% (±10%) relative air humidity to assess changes in the percentage of germination and viability over time. In the field, a reduction in seed viability was observed over the study period, with a total loss of viability of non-germinated seeds at seven months after burial. The maximum germination (close to 26%) was observed in the samples that were exhumed between five and seven months after burial. In the field, seedling emergence did not exceed 10% and seedling mortality was not observed. The percentages of germination and of viable seeds decreased both in burial and stored seeds. The stored seeds maintained viability at up to six months, with marked reduction thereafter. After the germination tests (four months) in the laboratory, all of the remaining seeds were nonviable. The ecological, physiological and reproductive characteristics of the species are discussed, and we concluded that S. romanzoffiana seeds have short longevity after imbibition, and low potential for soil seed bank formation. 2015 artículo científico 0034-7744 https://www.redalyc.org/articulo.oa?id=44938603002 en http://www.redalyc.org/revista.oa?id=449 Revista de Biología Tropical application/pdf Universidad de Costa Rica Revista de Biología Tropical (Costa Rica) Num.2 Vol.63 |
| format | Artículo científico |
| id | redalyc_44938603002 |
| institution | Redalyc |
| language | en |
| publishDate | 2015 |
| publisher | Universidad de Costa Rica |
| spellingShingle | Longevity and germination of Syagrus romanzoffiana (Arecaceae) seeds and its ecological implications Túlio Gabriel Soares Oliveira Biología Palm tree viability seed bank queen palm seed storage Longevity and germination of Syagrus romanzoffiana (Arecaceae) seeds and its ecological implications Túlio Gabriel Soares Oliveira José Anderson Cleiton Leonardo Monteiro Ribeiro José Marcio Rocha Faria Biología Palm tree viability seed bank queen palm seed storage Syagrus romanzoffiana is a palm tree native and widely distributed of South America. The present study investigated the longevity and germination of the buried seeds of this species in an experimental seed bank. Laboratory germination and viability tests were performed for comparison with field results. Pyrenes (seeds enclosed by the endocarp) were buried in a forest fragment edge in July 2012 (dry season) and exhumed monthly during one year, for the assessment of water content and percentage of germinated and viable seeds. Germination tests were conducted in a Mangelsdorf-type germinator at 30°C under constant light and the viabil - ity was assessed by the tetrazolium test. An additional sample of pyrenes was buried to evaluate the percentage of seedling emergence and survival. Climatic and soil moisture data were recorded. In the laboratory, the pyrenes were stored for one year in a temperature-controlled room at 20ºC and 75% (±10%) relative air humidity to assess changes in the percentage of germination and viability over time. In the field, a reduction in seed viability was observed over the study period, with a total loss of viability of non-germinated seeds at seven months after burial. The maximum germination (close to 26%) was observed in the samples that were exhumed between five and seven months after burial. In the field, seedling emergence did not exceed 10% and seedling mortality was not observed. The percentages of germination and of viable seeds decreased both in burial and stored seeds. The stored seeds maintained viability at up to six months, with marked reduction thereafter. After the germination tests (four months) in the laboratory, all of the remaining seeds were nonviable. The ecological, physiological and reproductive characteristics of the species are discussed, and we concluded that S. romanzoffiana seeds have short longevity after imbibition, and low potential for soil seed bank formation. 2015 artículo científico 0034-7744 https://www.redalyc.org/articulo.oa?id=44938603002 en http://www.redalyc.org/revista.oa?id=449 Revista de Biología Tropical application/pdf Universidad de Costa Rica Revista de Biología Tropical (Costa Rica) Num.2 Vol.63 |
| title | Longevity and germination of Syagrus romanzoffiana (Arecaceae) seeds and its ecological implications |
| topic | Biología Palm tree viability seed bank queen palm seed storage |
| url | https://www.redalyc.org/articulo.oa?id=44938603002 |