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| Format: | Artículo científico |
| Language: | es |
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Universidad de Costa Rica
2015
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| Online Access: | https://www.redalyc.org/articulo.oa?id=44933764020 |
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| author | Jhon Alexander Vargas Figueroa |
| author_facet | Jhon Alexander Vargas Figueroa |
| contents | Germinación de semillas de cuatro especies arbóreas del bosque seco tropical del Valle del Cauca, Colombia Jhon Alexander Vargas Figueroa Olga Lucía Duque Palacio Alba Marina Torres González Biología Samanea saman Tabebuia rosea light response Jacaranda caucana Pithecellobium dulce The ecological restoration strategies for highly threatened ecosystems such as the tropical dry forest, depend on the knowledge of limiting factors of biological processes for the different species. Some of these include aspects such as germination and seed longevity of typical species present in those forests. In this study, we evaluated the effect of light and temperature on seed germination of two Fabaceae ( Samanea saman and Jacaranda caucana ) and two Bignoniaceae ( Pithecellobium dulce and Tabebuia rosea ) species having potential use in restoration, and we analyzed the seed storage behavior of these species for a three months period. To study the light effect, four levels of light quality on seeds were used (photoperiod of 12 hours of white light, darkness and light enriched in red and farred, both for an hour each day), and we combined them with three levels of alternated temperatures (20/25, 20/30 and 25/30°C16/8h). For the storage behavior, two levels of seed moisture content particular for each species were used (low: 3.56.1% and high: 8.313.8%), with three storage temperatures (20, 5 and 20°C) and two storage times (one and three months). The criterion for germination was radicle emergence which was measured in four replicates per treatment, and was expressed as percentage of germination (PG). There were significant differences in germination of Samanea saman and Jacaranda caucana among light and temperature treatments, with the lowest value in darkness treatments, whereas germination of Pithecellobium dulce and Tabebuia rosea did not differ between treatments (PG>90%). The most suitable temperature regime to promote germination in all species was 25/30°C. These four species showed an orthodox seed storage behavior. We concluded that seeds of P. dulce , J. caucana and T. rosea did not have an apparent influence of all light conditions tested in their germination response, which might confer advantages in colonization and establish ment processes, while S. saman did not germinate well in darkness. We suggest the use of seeds of P. dulce, J. caucana and T. rosea in ecological restoration processes, due to their tolerance and germination under a wide range of temperature and light conditions. Futhermore, seeds of S. saman might be used in open areas such as forest gaps. 2015 artículo científico 0034-7744 https://www.redalyc.org/articulo.oa?id=44933764020 es 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.1 Vol.63 |
| format | Artículo científico |
| id | redalyc_44933764020 |
| language | es |
| publishDate | 2015 |
| publisher | Universidad de Costa Rica |
| spellingShingle | Germinación de semillas de cuatro especies arbóreas del bosque seco tropical del Valle del Cauca, Colombia Jhon Alexander Vargas Figueroa Biología Samanea saman Tabebuia rosea light response Jacaranda caucana Pithecellobium dulce Germinación de semillas de cuatro especies arbóreas del bosque seco tropical del Valle del Cauca, Colombia Jhon Alexander Vargas Figueroa Olga Lucía Duque Palacio Alba Marina Torres González Biología Samanea saman Tabebuia rosea light response Jacaranda caucana Pithecellobium dulce The ecological restoration strategies for highly threatened ecosystems such as the tropical dry forest, depend on the knowledge of limiting factors of biological processes for the different species. Some of these include aspects such as germination and seed longevity of typical species present in those forests. In this study, we evaluated the effect of light and temperature on seed germination of two Fabaceae ( Samanea saman and Jacaranda caucana ) and two Bignoniaceae ( Pithecellobium dulce and Tabebuia rosea ) species having potential use in restoration, and we analyzed the seed storage behavior of these species for a three months period. To study the light effect, four levels of light quality on seeds were used (photoperiod of 12 hours of white light, darkness and light enriched in red and farred, both for an hour each day), and we combined them with three levels of alternated temperatures (20/25, 20/30 and 25/30°C16/8h). For the storage behavior, two levels of seed moisture content particular for each species were used (low: 3.56.1% and high: 8.313.8%), with three storage temperatures (20, 5 and 20°C) and two storage times (one and three months). The criterion for germination was radicle emergence which was measured in four replicates per treatment, and was expressed as percentage of germination (PG). There were significant differences in germination of Samanea saman and Jacaranda caucana among light and temperature treatments, with the lowest value in darkness treatments, whereas germination of Pithecellobium dulce and Tabebuia rosea did not differ between treatments (PG>90%). The most suitable temperature regime to promote germination in all species was 25/30°C. These four species showed an orthodox seed storage behavior. We concluded that seeds of P. dulce , J. caucana and T. rosea did not have an apparent influence of all light conditions tested in their germination response, which might confer advantages in colonization and establish ment processes, while S. saman did not germinate well in darkness. We suggest the use of seeds of P. dulce, J. caucana and T. rosea in ecological restoration processes, due to their tolerance and germination under a wide range of temperature and light conditions. Futhermore, seeds of S. saman might be used in open areas such as forest gaps. 2015 artículo científico 0034-7744 https://www.redalyc.org/articulo.oa?id=44933764020 es 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.1 Vol.63 |
| title | Germinación de semillas de cuatro especies arbóreas del bosque seco tropical del Valle del Cauca, Colombia |
| topic | Biología Samanea saman Tabebuia rosea light response Jacaranda caucana Pithecellobium dulce |
| url | https://www.redalyc.org/articulo.oa?id=44933764020 |