Pollination of two sympatric species of Stelis (Pleurothallidinae, Orchidaceae)
Stelis hymenantha and S. immersa are epiphytic orchids growing sympatrically on oaks in the area of Ocosingo, Chiapas. They belong to the group of Pleurothallidinae, in which pollination by Diptera is frequent. The objective of this paper is to determine pollination system as well as the mechanisms...
| Autores principales: | , |
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| Formato: | Online |
| Lenguaje: | spa |
| Publicado: |
Instituto de Ecología, A.C.
2006
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| Acceso en línea: | https://abm.ojs.inecol.mx/index.php/abm/article/view/1009 |
| _version_ | 1799771261667115008 |
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| author | Albores-Ortiz, Octavio Sosa, Victoria |
| author_facet | Albores-Ortiz, Octavio Sosa, Victoria |
| author_sort | Albores-Ortiz, Octavio |
| collection | ABM |
| description | Stelis hymenantha and S. immersa are epiphytic orchids growing sympatrically on oaks in the area of Ocosingo, Chiapas. They belong to the group of Pleurothallidinae, in which pollination by Diptera is frequent. The objective of this paper is to determine pollination system as well as the mechanisms that prevent hybridization between these species. Field work was carried out in order to determine the number of individuals per population, flowering period, fruit set, as well as pollinators, attractants and rewards that the plants of these two species offer. Results indicate that S. hymenantha and S. immersa coincide in flowering during certain period of time, that the flowers have different size and morphology, that both produce fragrances, that are different, and that both produce a ‘‘nectarlike’’ transparent substance on the base of the lip and in one of the species also on the petals. Stelis immersa is pollinated by females of a fly in the genus Megaselia (Phoridae) and receives a large number of visitors. The pollinator of S. hymenantha was not determined precisely, however a Drosophilidae fly was seen entering flowers. Removal of pollinaria is determined by the size of pollinator. A very low number of capsules is produced in both species. |
| format | Online |
| id | oai:oai.abm.ojs.inecol.mx:article-1009 |
| institution | Acta Botanica Mexicana |
| language | spa |
| publishDate | 2006 |
| publisher | Instituto de Ecología, A.C. |
| record_format | ojs |
| spelling | oai:oai.abm.ojs.inecol.mx:article-10092022-12-24T04:37:11Z Pollination of two sympatric species of Stelis (Pleurothallidinae, Orchidaceae) Polinización de dos especies simpátricas de Stelis (Pleurothallidinae, Orchidaceae) Albores-Ortiz, Octavio Sosa, Victoria Diptera Drosophilidae Orchidaceae Phoridae Pleurothallidinae pollination Stelis Diptera Drosophilidae miofilia néctar Orchidaceae Phoridae polinización Stelis Stelis hymenantha and S. immersa are epiphytic orchids growing sympatrically on oaks in the area of Ocosingo, Chiapas. They belong to the group of Pleurothallidinae, in which pollination by Diptera is frequent. The objective of this paper is to determine pollination system as well as the mechanisms that prevent hybridization between these species. Field work was carried out in order to determine the number of individuals per population, flowering period, fruit set, as well as pollinators, attractants and rewards that the plants of these two species offer. Results indicate that S. hymenantha and S. immersa coincide in flowering during certain period of time, that the flowers have different size and morphology, that both produce fragrances, that are different, and that both produce a ‘‘nectarlike’’ transparent substance on the base of the lip and in one of the species also on the petals. Stelis immersa is pollinated by females of a fly in the genus Megaselia (Phoridae) and receives a large number of visitors. The pollinator of S. hymenantha was not determined precisely, however a Drosophilidae fly was seen entering flowers. Removal of pollinaria is determined by the size of pollinator. A very low number of capsules is produced in both species. El objetivo de este trabajo es el de llevar a cabo estudios de polinización en las epífitas Stelis hymenantha y S. immersa que crecen simpátricamente en bosques de encino en la región de Ocosingo, Chiapas. Estas orquídeas pertenecen al linaje de las Pleurothallidinae, en el cual la polinización por dípteros es frecuente. Por medio de observaciones de campo en varias poblaciones de estos taxa se determinó su fenología, la situación de sus poblaciones, sus preferencias ecológicas, sus polinizadores así como su morfología floral y el tipo de atrayentes y recompensas que ofrecen. Los resultados indican que las flores de las dos especies coinciden en cierto momento en sus épocas de floración, que sus flores presentan grandes diferencias morfológicas y de tamaño, que atraen insectos al producir un líquido similar al néctar que se distribuye en forma de una capa delgada sobre la base del labelo y en una de las especies también en los pétalos, además de emitir fragancias diferentes. Stelis immersa recibe un mayor número de visitantes y sus polinizadores son hembras de un pequeño díptero, del género Megaselia (Phoridae). Aunque no se encontró un insecto llevando los polinarios de S. hymenantha, se observó a una mosca del grupo de los Drosophilidae penetrando las flores. La formación de cápsulas en las dos especies es muy baja en comparación con el número de flores. Una divergencia morfológica floral y una emisión de fragancias diferentes hacen que no se compartan los polinizadores, previniendo la hibridación entre estas orquídeas. Se requiere un tamaño específico de los polinizadores para que los polinarios sean removidos. Instituto de Ecología, A.C. 2006-01-01 info:eu-repo/semantics/article info:eu-repo/semantics/publishedVersion artículo evaluado por pares application/pdf https://abm.ojs.inecol.mx/index.php/abm/article/view/1009 10.21829/abm74.2006.1009 Acta Botanica Mexicana; No. 74 (2006); 155-168 Acta Botanica Mexicana; Núm. 74 (2006); 155-168 2448-7589 0187-7151 spa https://abm.ojs.inecol.mx/index.php/abm/article/view/1009/1170 Derechos de autor 2016 Acta Botanica Mexicana https://creativecommons.org/licenses/by-nc/4.0 |
| spellingShingle | Albores-Ortiz, Octavio Sosa, Victoria Pollination of two sympatric species of Stelis (Pleurothallidinae, Orchidaceae) |
| title | Pollination of two sympatric species of Stelis (Pleurothallidinae, Orchidaceae) |
| title_full | Pollination of two sympatric species of Stelis (Pleurothallidinae, Orchidaceae) |
| title_fullStr | Pollination of two sympatric species of Stelis (Pleurothallidinae, Orchidaceae) |
| title_full_unstemmed | Pollination of two sympatric species of Stelis (Pleurothallidinae, Orchidaceae) |
| title_short | Pollination of two sympatric species of Stelis (Pleurothallidinae, Orchidaceae) |
| title_sort | pollination of two sympatric species of stelis (pleurothallidinae, orchidaceae) |
| url | https://abm.ojs.inecol.mx/index.php/abm/article/view/1009 |
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