Data/hora: 05/06/2024 19:16:06

Provedor de dados: 	88	
País: 	Brazil	
Título: 	Effect of storage of achenes of Bidens gardneri Baker on light sensitivity during germination	
Autores: 	SASSAKI,REGINA M.; ZAIDAN,LILIAN B.P.; FELIPPE,G.M.	
Data: 	1999-04-01	
Ano: 	1999	
Palavras-chave: 	Bidens gardneri; Longevity; Light sensitivity.	
Resumo: 	Bidens gardneri is a very common herbaceous species in the cerrados of the state of São Paulo, whose seeds become light sensitive at 25°C only. Achenes of this species were stored in refrigerator at 4°C and in cerrado soil and in forest soil. The field experiments were carried out in the cerrado at the Reserva Biológica e Estação Experimental de Moji Guaçu, in Moji Guaçu and in the forest of the Instituto de Botânica, in São Paulo, Brazil. Achenes of B. gardneri vary in size and achenes from 7 to 12 mm long were used. Achenes stored for up to 6 months at 4°C showed light sensitivity; after 9 months storage, the difference in germination between light and darkness had disappeared for the smallest and the largest achenes used. Seeds of B. gardneri germinated during the period of storage in soil; the number of germinated seeds increased over the storage time, while the number of intact achenes decreased for the same period, no matter if the experiment was being carried out in the cerrado or in the forest. Therefore, the achenes germinated in soil in darkness. Light sensitivity was lost in intact achenes that had been stored in soil for three months.	
Tipo: 	Info:eu-repo/semantics/article	
Idioma: 	Inglês	
Identificador: 	http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-84041999000100010	
Editor: 	Sociedade Botânica de São Paulo	
Relação: 	10.1590/S0100-84041999000100010	
Formato: 	text/html	
Fonte: 	Brazilian Journal of Botany  v.22 n.1 1999	
Fonte: 	info:eu-repo/semantics/openAccess