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

Muñoz, V; Hernandez-Gonzalez, MC; Buschmann AH.; Graham, MH; Vasquez, JA

Abstract

Vegetative 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

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Título según WOS: Variability in per capita oogonia and sporophyte production from giant kelp gametophytes (Macrocystis pyrifera, Phaeophyceae)
Título según SCOPUS: Variability in per capita oogonia and sporophyte production from giant kelp gametophytes (Macrocystis pyrifera, Phaeophyceae)
Título según SCIELO: Variability in per capita oogonia and sporophyte production from giant kelp gametophytes (Macrocystis pyrifera, Phaeophyceae)
Título de la Revista: REVISTA CHILENA DE HISTORIA NATURAL
Volumen: 77
Número: 4
Editorial: SOC BIOLGIA CHILE
Fecha de publicación: 2004
Página de inicio: 639
Página final: 647
Idioma: Spanish
DOI:

10.4067/S0716-078X2004000400007

Notas: ISI, SCIELO, SCOPUS