Seed germination after fire: a study with a plant inhabiting non-fire-prone areas

Seed germination after fire: a study with a plant inhabiting non-fire-prone areas

Título alternativo Germinación de semillas después del fuego: un estudio con una planta que habita áreas no propensas al fuego
Autor Menezes, Luciana Cristina Candido Ribeiro de Google Scholar
Rossi, Marcelo Nogueira Autor UNIFESP Google Scholar
Instituição Universidade de São Paulo (USP)
Universidade Federal de São Paulo (UNIFESP)
Resumo After a fire event, germination of seeds with hard coats can be enhanced. In the present study, we investigated whether germination of Mimosa bimucronata (DC.) Kuntze (Fabaceae) seeds, which present hard coats, is increased after fire, even though these trees usually occur in damp areas, where fire is a transient event. Fire events were manipulated in trays filled with soil covered with different amounts of dry grasses, characterizing three treatments: a) 0g (control group); b) 300g, and c) 450g of dry grass. Burning treatments were applied to seeds positioned either on the soil surface or buried in the soil. Germination experiments were carried out at 0-h and 24-h after fire to obtain the germination percentage and the Germination Speed Index (GSI). For buried seeds, the control and the 300g treatments presented significantly higher germination percentages than the 450g treatment. On the other hand, the GSI was significantly higher in the 300g treatment. Significant differences were not found between 0-h and 24-h. Seeds on the soil surface did not survive after burning. Our study showed that temperatures around 100 degrees C significantly decrease the germinability of M. bimucronata seeds. However, when seeds were buried, the germination percentage did not differ between the control group and the 300g treatment. Results also suggest that temperatures around 60 degrees C may enhance the velocity of germination of M. bimucronata seeds.
Assunto Germination
Hard seed coat
High temperatures
Fabaceae
Idioma Inglês
Financiador Fundação de Amparo à Pesquisa do Estado de São Paulo (FAPESP)
Número do financiamento FAPESP: 05/57999-3
FAPESP: 04/06737-6
Data 2011-01-01
Publicado em Phyton-international Journal Of Experimental Botany. Vicente Lopez (ba): Fundacion Romulo Raggio, v. 80, p. 153-160, 2011.
ISSN 0031-9457 (Sherpa/Romeo, fator de impacto)
Editor Fundacion Romulo Raggio
Extensão 153-160
Fonte http://www.scielo.org.ar/scielo.php?script=sci_arttext&pid=S1851-56572011000200006
Direito de acesso Acesso aberto Open Access
Tipo Artigo
Web of Science WOS:000299301200023
SciELO S1851-56572011000200006 (estatísticas na SciELO)
URI http://repositorio.unifesp.br/11600/45108

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