Data/hora: 08/06/2024 14:51:54

Provedor de dados: 	97	
País: 	Chile	
Título: 	Variability in per capita oogonia and sporophyte production from giant kelp gametophytes (Macrocystis pyrifera, Phaeophyceae)	
Autores: 	MUÑOZ,VERÓNICA; HERNÁNDEZ-GONZÁLEZ,MARÍA C.; BUSCHMANN,ALEJANDRO H.; GRAHAM,MICHAEL H.; VÁSQUEZ,JULIO A.	
Data: 	2004-12-01	
Ano: 	2004	
Palavras-chave: 	Gametophytes; Macrocystis pyrifera; Nutrients; Oogonia production; Sporophyte production; Temperature.	
Resumo: 	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	
Tipo: 	Journal article	
Idioma: 	Inglês	
Identificador: 	http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0716-078X2004000400007	
Editor: 	Sociedad de Biología de Chile	
Formato: 	text/html	
Fonte: 	Revista chilena de historia natural  v.77 n.4 2004