Germination and sporophyte frequency of two sympatric species of Blechnum (Blechnaceae)
Background and Aims: Light and water are resources that limit the germination and growth of vascular plants in forests and the establishment process significantly influence the species distribution. For this reason, we evaluated whether sympatric ferns Blechnum appendiculatum and B. schiedeanum (Ble...
| Autori principali: | , , |
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| Natura: | Online |
| Lingua: | spa |
| Pubblicazione: |
Instituto de Ecología, A.C.
2016
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| Accesso online: | https://abm.ojs.inecol.mx/index.php/abm/article/view/1167 |
| _version_ | 1799771316834795520 |
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| author | López-Romero, Juan Manuel Riaño, Karolina Briones, Oscar |
| author_facet | López-Romero, Juan Manuel Riaño, Karolina Briones, Oscar |
| author_sort | López-Romero, Juan Manuel |
| collection | ABM |
| description | Background and Aims: Light and water are resources that limit the germination and growth of vascular plants in forests and the establishment process significantly influence the species distribution. For this reason, we evaluated whether sympatric ferns Blechnum appendiculatum and B. schiedeanum (Blechnaceae) differ in habitat preference and if their germination requirements may help explain their distribution in a mountain mesophyllous forest.Methods: Spores were exposed to light quality, amount of light and water potential treatments. The frequency of sporophytes of both species and the proportion of light received in the forest was also recorded.Key results: It was found that both species did not germinate in darkness and few spores did so with far-red wavelength compared to white light. The spore sprout was promoted with the increase of light intensity, and 0.04 µmol m-2 s-1 light was sufficient so this was more than 60% in both species. The decrease in water availability reduced the germination, but B. appendiculatum showed greater ability to withstand water scarcity to -1.05 MPa. Blechnum schiedeanum was abundant in environments with relatively closed canopy while B. appendiculatum occurred more frequently on the forest border.Conclusions: Germination requirements were partially related to habitat preference of the species. Blechnum schiedeanum seems to be more shade tolerant than B. appendiculatum. |
| format | Online |
| id | oai:oai.abm.ojs.inecol.mx:article-1167 |
| institution | Acta Botanica Mexicana |
| language | spa |
| publishDate | 2016 |
| publisher | Instituto de Ecología, A.C. |
| record_format | ojs |
| spelling | oai:oai.abm.ojs.inecol.mx:article-11672022-12-23T04:40:02Z Germination and sporophyte frequency of two sympatric species of Blechnum (Blechnaceae) Germinación y frecuencia de esporofitos de dos especies simpátricas de Blechnum (Blechnaceae) López-Romero, Juan Manuel Riaño, Karolina Briones, Oscar Blechnum appendiculatum Blechnum schiedeanum coexistence fern spore Blechnum appendiculatum Blechnum schiedeanum coexistencia espora helecho Background and Aims: Light and water are resources that limit the germination and growth of vascular plants in forests and the establishment process significantly influence the species distribution. For this reason, we evaluated whether sympatric ferns Blechnum appendiculatum and B. schiedeanum (Blechnaceae) differ in habitat preference and if their germination requirements may help explain their distribution in a mountain mesophyllous forest.Methods: Spores were exposed to light quality, amount of light and water potential treatments. The frequency of sporophytes of both species and the proportion of light received in the forest was also recorded.Key results: It was found that both species did not germinate in darkness and few spores did so with far-red wavelength compared to white light. The spore sprout was promoted with the increase of light intensity, and 0.04 µmol m-2 s-1 light was sufficient so this was more than 60% in both species. The decrease in water availability reduced the germination, but B. appendiculatum showed greater ability to withstand water scarcity to -1.05 MPa. Blechnum schiedeanum was abundant in environments with relatively closed canopy while B. appendiculatum occurred more frequently on the forest border.Conclusions: Germination requirements were partially related to habitat preference of the species. Blechnum schiedeanum seems to be more shade tolerant than B. appendiculatum. Antecedentes y Objetivos: La luz y el agua son recursos que limitan la germinación y el crecimiento de las plantas en los bosques, y el establecimiento influye importantemente en la distribución de las especies. Por tal razón se evaluó si los helechos simpátricos Blechnum appendiculatum y B. schiedeanum (Blechnaceae) difieren en la preferencia de hábitat y si los requerimientos en la germinación podrían ayudar a explicar su distribución en un bosque mesófilo de montaña.Métodos: Las esporas se expusieron a tratamientos de calidad de luz, cantidad de luz y potencial hídrico. También se registró la frecuencia de esporofitos de ambas especies y la proporción de luz recibida en el bosque.Resultados clave: Ambas especies no germinaron en oscuridad y pocas esporas lo hicieron con luz rojo-lejana, en comparación con luz roja y blanca. El brote de la espora aumentó con la cantidad de luz recibida, y 0.04 µmol m-2 s-1 de luz fue suficiente para que en ambas especies éste fuese mayor a 60%. La disminución en la disponibilidad de agua redujo la germinación, pero B. appendiculatum mostró mayor capacidad para soportar la escasez hídrica a -1.05 MPa. En ambientes con dosel relativamente cerrado fue abundante B. schiedeanum, mientras que B. appendiculatum ocurrió con mayor frecuencia en ambientes abiertos.Conclusiones: Los requerimientos para la germinación de la espora se relacionaron parcialmente con la preferencia del hábitat de las especies. Blechnum schiedeanum parece ser más tolerante a la sombra que B. appendiculatum. Instituto de Ecología, A.C. 2016-10-24 info:eu-repo/semantics/article info:eu-repo/semantics/publishedVersion artículo evaluado por pares application/pdf text/html https://abm.ojs.inecol.mx/index.php/abm/article/view/1167 10.21829/abm117.2016.1167 Acta Botanica Mexicana; No. 117 (2016); 47-58 Acta Botanica Mexicana; Núm. 117 (2016); 47-58 2448-7589 0187-7151 spa https://abm.ojs.inecol.mx/index.php/abm/article/view/1167/1380 https://abm.ojs.inecol.mx/index.php/abm/article/view/1167/html Derechos de autor 2016 Acta Botanica Mexicana |
| spellingShingle | López-Romero, Juan Manuel Riaño, Karolina Briones, Oscar Germination and sporophyte frequency of two sympatric species of Blechnum (Blechnaceae) |
| title | Germination and sporophyte frequency of two sympatric species of Blechnum (Blechnaceae) |
| title_full | Germination and sporophyte frequency of two sympatric species of Blechnum (Blechnaceae) |
| title_fullStr | Germination and sporophyte frequency of two sympatric species of Blechnum (Blechnaceae) |
| title_full_unstemmed | Germination and sporophyte frequency of two sympatric species of Blechnum (Blechnaceae) |
| title_short | Germination and sporophyte frequency of two sympatric species of Blechnum (Blechnaceae) |
| title_sort | germination and sporophyte frequency of two sympatric species of blechnum (blechnaceae) |
| url | https://abm.ojs.inecol.mx/index.php/abm/article/view/1167 |
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