Tesis Doctorado
Valor adaptativo de la longitud de la radícula de la planta holoparásita tristerix aphyllus (loranthaceae): detectando causas de selección natural.
Autor
González-Lozada, Wilfredo Antonio
Institución
Resumen
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. PFCHA-Becas Doctor en Ciencias Mención en Ecología y Biología Evolutiva 141p. PFCHA-Becas TERMINADA