Data/hora: 20/05/2024 04:57:00

Provedor de dados: 	Revista Brasileira de Botânica	
País: 	Brazil	
Título: 	High irradiance and temperature inhibit the germination of spores of the fern Rumohra adiantiformis (Forst.) Ching (Dryopteridaceae)	
Autores: 	BRUM,FRANCIS R.; RANDI,ÁUREA M.	
Data: 	2002-12-01	
Ano: 	2002	
Palavras-chave: 	Germination; Irradiance; Rumohra adiantiformis; Temperature.	
Resumo: 	Rumohra adiantiformis (Forst.) Ching is a fern (Dryopteridaceae) which is used to compose floral arrangements. Fertile fronds were harvested in the "Permanently Protected Area" of Ilha Comprida, São Paulo, Brazil. Sterilized spores were germinated in Mohr liquid medium modified by Dyer. The effect of 72%, 54%, 17% and 9% of total irradiance on germination under field conditions, was analyzed. Experiments were carried out in March (I), April (II) and August of 2000 (III). Under 54% and 72% of total irradiance in Experiment I (March) the germination was completely inhibited and partially inhibited under 72% of total irradiance in Experiment II (April). The lowest mean germination time (&lt;img border=0 width=10 height=12 id="_x0000_i1025" src="../img/a02s01.gif"&gt;) was observed under 9% of total irradiance in Experiments II (11.62 days) and III (8.80 days) respectively, followed by 17% in Experiment III (10.12 days) and 9% of total irradiance in the Experiment I (11.62 days ). The effect of temperatures of 15 ± 1, 20 ± 1, 25 ± 1 and 30 ± 1 ºC on germination was also analyzed. The lowest mean germination time (7.93 days) was observed at 25 ± 1 °C followed by 20 ± 1 °C. The highest mean germination time was observed at 15 ± 1 °C (12.10 days) followed by 30 ± 1 °C (10.63 days), which inhibited germination. The germination of R. adiantiformis was photoinhibited by high irradiance and partially inhibited by the highest temperature tested.	
Tipo: 	Info:eu-repo/semantics/article	
Idioma: 	Inglês	
Identificador: 	http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-84042002012000002	
Editor: 	Sociedade Botânica de São Paulo	
Relação: 	10.1590/S0100-84042002012000002	
Formato: 	text/html	
Fonte: 	Brazilian Journal of Botany  v.25 n.4 2002	
Fonte: 	info:eu-repo/semantics/openAccess