Data/hora: 02/06/2024 10:20:27

Provedor de dados: 	39	
País: 	Brazil	
Título: 	Germination and sporophytic development of Regnellidium diphyllum Lindm. (Marsileaceae) in the presence of copper	
Autores: 	Cassanego,Mara Betânia Brizola; Goldoni,Angélica; Heldt,Fágner Henrique; Osório,Daniela Montanari Migliavacca; Windisch,Paulo Günter; Droste,Annette.	
Data: 	2013-03-01	
Ano: 	2013	
Palavras-chave: 	Fern; Heavy metals; Pollution; Reproduction; Species conservation; Wetlands.	
Resumo: 	Regnellidium diphyllum Lindm. is a heterosporous fern growing in wetlands and humid soils that are being converted to agricultural activities. Many products that are used in agriculture contain copper, resulting in surface and groundwater contamination. Germination and initial development tests were performed using Meyer's solution containing copper sulphate at concentrations of 0 (control), 1, 5, 10, 50 and 100 mg L-1. The experiment was conducted in a growth chamber at 25 ± 1ºC for 28 days, with a 12/12-hour light/dark cycle and a photon flux density of 100 µmol m-2 s-1. The lowest germination rate (6%) was observed at 100 mg L-1. Primary root growth was significantly reduced at &gt; 10 mg L-1. Secondary leaves of sporophytes grown in concentrations &gt; 5 mg L-1 were progressively shorter than were those formed by the control plants. We conclude that the release of pollutants containing copper into the natural habitats of R. diphyllum can cause phytotoxicity, threatening the establishment of populations and worsening the already vulnerable conservation status of this species.	
Tipo: 	Info:eu-repo/semantics/article	
Idioma: 	Inglês	
Identificador: 	http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0102-33062013000100004	
Editor: 	Sociedade Botânica do Brasil	
Relação: 	10.1590/S0102-33062013000100004	
Formato: 	text/html	
Fonte: 	Acta Botanica Brasilica  v.27 n.1 2013	
Fonte: 	info:eu-repo/semantics/openAccess