INVESTIGADORES
COCUCCI Andrea Aristides
artículos
Título:
Pollinator-mediated selection in a specialized pollination system: matches and mismatches among populations.
Autor/es:
NATTERO J.; COCUCCI, A. A.; MEDEL, R.
Revista:
JOURNAL OF EVOLUTIONARY BIOLOGY
Editorial:
WILEY-BLACKWELL PUBLISHING, INC
Referencias:
Año: 2010 vol. 23 p. 1957 - 1968
ISSN:
1010-061X
Resumen:
Most
studies on pollinator-mediated selection have been performed in generalized
rather than specialized pollination systems. This situation has impeded
evaluation of the extent to which selection acts on attraction or specialized
key .oral traits involved in the plant-pollinator phenotypic interphase. We
studied pollinator-mediated selection in four populations of Nierembergia linariifolia, a self-incompatible and
oil-secreting plant pollinated exclusively by oil-collecting bees. We evaluated
whether .oral traits experience variable selection among populations and
whether attraction and .t traits are heterogeneously selected across
populations. Populations differed in every .ower trait and selection was
consistently observed for corolla size and .ower shape, two traits involved in
the .rst steps of the pollination process. However, we found no selection
acting on mechanical-.t traits. The observation that selection occurred upon
attraction rather than mechanical-.t traits, suggests that plants are not
currently evolving .ne-tuned morphological adaptations to local pollinators and
that phenotypic matching is not necessarily an expected outcome in this specialized
pollination system.