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	Provedor de dados BJB (1) Rev. Bras. Bot. (1) RChHN (1) Autor BEGOVACZ,A. (1) BUSCHMANN,ALEJANDRO H. (1) DUZ,SONIA REGINA (1) ESTEVES,L. M. (1) FELIPPE,G. M. (1) FIILIPPINI,ELAINE CRISTINA DE PAULA (1) GRAHAM,MICHAEL H. (1) HERNÁNDEZ-GONZÁLEZ,MARÍA C. (1) MUÑOZ,VERÓNICA (1) RANDI,ÁUREA MARIA (1) SIMABUKURO,E. A. (1) VÁSQUEZ,JULIO A. (1) Mais... Palavra-chave Gametophytes (3) Brazil (1) Cerrado (1) Cerradão (1) Fern germination (1) Fern spore bank (1) Gallery forest (1) Light (1) Macrocystis pyrifera (1) Nutrients (1) Oogonia production (1) Sporophyte production (1) Storage (1) Temperature (1) Mais... Tipo do documento Info:eu-repo/semantics/article (2) Journal article (1) Ano 2004 (1) 1999 (2) País Brazil (2) Chile (1) Idioma Inglês (3)		Ordenar por:  Relevância Autor Título Ano Registros recuperados: 3 Primeira ... 1 ... Última Light and storage on the germination of spores of Dicksonia sellowiana (Presl.) Hook., Dicksoniaceae Rev. Bras. Bot. FIILIPPINI,ELAINE CRISTINA DE PAULA; DUZ,SONIA REGINA; RANDI,ÁUREA MARIA. Spores of Dicksonia sellowiana are positively photoblastic and reach the maximum percentage of germination at 23 ± 2°C in white light after seven days of imbibition. The pre-induction phase for spores induced by white or red light for 24 hours was 72 hours. Gametophytes grown in white light were plane and bidimensional, while those grown under red light were filamentous. The higher the number of hours of light applied per day during 10 days, the higher the percentage of germination. Germination was higher for long white light treatments applied on a daily basis. The effect of different light intensities on germination was also investigated here. The lower percentages of germination were observed for spores kept under 43% and 2% of full sunlight, while... Tipo: Info:eu-repo/semantics/article Palavras-chave: Fern germination; Gametophytes; Light; Storage. Ano: 1999 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-84041999000100004 Variability in per capita oogonia and sporophyte production from giant kelp gametophytes (Macrocystis pyrifera, Phaeophyceae) RChHN MUÑOZ,VERÓNICA; HERNÁNDEZ-GONZÁLEZ,MARÍA C.; BUSCHMANN,ALEJANDRO H.; GRAHAM,MICHAEL H.; VÁSQUEZ,JULIO A.. 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... Tipo: Journal article Palavras-chave: Gametophytes; Macrocystis pyrifera; Nutrients; Oogonia production; Sporophyte production; Temperature. Ano: 2004 URL: http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0716-078X2004000400007 Fern spore bank at Pedregulho (Itirapina, São Paulo, Brazil) BJB SIMABUKURO,E. A.; BEGOVACZ,A.; ESTEVES,L. M.; FELIPPE,G. M.. This paper presents an analysis of pteridophyte spore bank the site of Pedregulho, in Itirapina, state of São Paulo, Brazil. The samples of soil were collected in February (rainy season) and August (dry season) in four localities: open cerrado, cerradão, gallery forest and a disturbed area at depths of 0-5, 5-10 and 10-15 cm. The samples were collected in duplicate. Of the duplicates, one was used for spore counting and the second one for spore germination. In the cerrado, cerradão and gallery forest soil samples the values for pteridophyte spores were similar in the rainy and dry season, but in the disturbed area the percentage of spores was higher in the rainy season than in the dry season. The number of pteridophyte spores decreased with soil depth in... Tipo: Info:eu-repo/semantics/article Palavras-chave: Fern spore bank; Gametophytes; Cerrado; Cerradão; Gallery forest; Brazil. Ano: 1999 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0034-71081999000100017 Registros recuperados: 3 Primeira ... 1 ... Última

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