Valor adaptativo de la longitud de la radícula de la planta holoparásita tristerix aphyllus (loranthaceae): detectando causas de selección natural.
Phenotypic plasticity is the ability of a genotype to respond to changes in the environment through modifications in the phenotype. This capacity is adaptive in heterogeneous environments if the plastic genotypes show a higher fitness than nonplastic genotypes. In this thesis, I studied the plastici...
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| Tipo de recurso: | tesis doctoral |
| Estado: | Versión publicada |
| Fecha de publicación: | 2004 |
| País: | Chile |
| Idioma: | español |
| OAI Identifier: | oai:repositorio.anid.cl:10533/179389 |
| Acceso en línea: | http://creativecommons.org/licenses/by-nc-nd/3.0/cl/ https://hdl.handle.net/10533/179389 |
| Access Level: | acceso abierto |
| Sumario: | Phenotypic plasticity is the ability of a genotype to respond to changes in the environment through modifications in the phenotype. This capacity is adaptive in heterogeneous environments if the plastic genotypes show a higher fitness than nonplastic genotypes. In this thesis, I studied the plasticity of the radicle lengh in the holoparasitic mistletoe Tristerix aphyllus infecting the cactus Echinopsis chilensis. Unlike other mistletoes where the seeds are directly deposited in the host brances, the seeds of T. aphyllus are deposited mainly on the host spines. The long radicel of T. aphyllus has been suggested like an adaptation that overcomes the barrier imposed by the host spines. |
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