Variability in per capita oogonia and sporophyte production from giant kelp gametophytes (Macrocystis pyrifera, Phaeophyceae)

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Muñoz, V., Hernández-González, M. C., Buschmann, A. H., Graham, M. H., & Vásquez, J. A. (2004). Variability in per capita oogonia and sporophyte production from giant kelp gametophytes (Macrocystis pyrifera, Phaeophyceae). Revista Chilena de Historia Natural, 77(4), 639-647.
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TitleVariability in per capita oogonia and sporophyte production from giant kelp gametophytes (Macrocystis pyrifera, Phaeophyceae)
AuthorsV. Muñoz, M. Hernández-González, A. Buschmann, M. Graham, J. Vásquez
AbstractVegetative growth and fertility of kelp gametophytes are thought to be antagonistic, such that most successful kelp recruitment is assumed to result from fertilization of single oogonia released from unicellular female gametophytes. We used laboratory culture experiments to study the effect of temperature and nutrient addition on the per capita production of oogonia and sporophytes from Macrocystis pyrifera female gametophytes. Our results indicate that individual multicellular female gametophytes can give rise to more than one oogonium and that per capita oogonia production significantly increases with the enhancement of culture conditions (i.e., decreased temperature and increased nutrient concentration). Furthermore, the production of multiple oogonia per female often led to the production of multiple sporophytes per female. We discuss the importance of these results relative to variability in M. pyrifera life histories (e.g., annual vs. perennial) and their likely ecological and evolutionary consequences.
JournalRevista Chilena de Historia Natural
Date2004
Volume77
Issue4
Start page639
End page647
ISSN0716078X
Subjectsalgae, Macrocystis pyrifera, Phaeophyceae
NoteCited By (since 1996):11, Seaweeds

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