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	Provedor de dados Acta Botanica (2) Autor Baeza,M. Jaime (2) Fidelis,Alessandra (2) Gorgone-Barbosa,Elizabeth (1) Pivello,Vânia R. (1) Zupo,Talita (1) Palavra-chave Cerrado (2) Fire (1) Germination percentage (1) Invasive species (1) Mean germination time (1) Mediterranean Basin (1) Physical dormancy (1) Physiological dormancy (1) Post-fire germination (1) Seed dormancy (1) Temperature fluctuation (1) Urochloa brizantha (1) Urochloa decumbens (1) Mais... Tipo do documento Info:eu-repo/semantics/article (1) Info:eu-repo/semantics/other (1) Ano 2016 (2) País Brazil (2) Idioma Inglês (2)		Ordenar por:  Relevância Autor Título Ano Registros recuperados: 2 Primeira ... 1 ... Última The effect of simulated heat-shock and daily temperature fluctuations on seed germination of four species from fire-prone ecosystems Acta Botanica Zupo,Talita; Baeza,M. Jaime; Fidelis,Alessandra. ABSTRACT Seed germination in many species from fire-prone ecosystems may be triggered by heat shock and/or temperature fluctuation, and how species respond to such fire-related cues is important to understand post-fire regeneration strategies. Thus, we tested how heat shock and daily temperature fluctuations affect the germination of four species from fire-prone ecosystems; two from the Cerrado and two from the Mediterranean Basin. Seeds of all four species were subjected to four treatments: Fire (F), temperature fluctuations (TF), fire+temperature fluctuations (F+TF) and control (C). After treatments, seeds were put to germinate for 60 days at 25ºC (dark). Responses differed according to species and native ecosystem. Germination percentage for the Cerrado... Tipo: Info:eu-repo/semantics/other Palavras-chave: Cerrado; Mediterranean Basin; Mean germination time; Physical dormancy; Post-fire germination. Ano: 2016 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0102-33062016000300514 Disturbance as a factor in breaking dormancy and enhancing invasiveness of African grasses in a Neotropical Savanna Acta Botanica Gorgone-Barbosa,Elizabeth; Pivello,Vânia R.; Baeza,M. Jaime; Fidelis,Alessandra. The Cerrado is threatened by wildfires and invasive species. We aimed to evaluate in laboratory conditions whether temperature fluctuation at the soil surface, resulting from the absence of vegetation due to fire, can affect the germination of Urochloa decumbens and U. brizantha, two invasive African grasses. Seeds of both species were submitted to simulations: 1) temperature during fire at 1cm belowground (F); 2) temperature fluctuation at 1cm belowground without vegetation cover for a month (TF); 3) (F) + (TF); 4) control at 25ºC. After treatments, seeds were put to germinate at 25ºC for 40 days. We had four replicates per treatment and three temporal replicates. We compared germination percentage and the mean germination time among treatments using... Tipo: Info:eu-repo/semantics/article Palavras-chave: Cerrado; Fire; Germination percentage; Invasive species; Physiological dormancy; Seed dormancy; Temperature fluctuation; Urochloa brizantha; Urochloa decumbens. Ano: 2016 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0102-33062016000100131 Registros recuperados: 2 Primeira ... 1 ... Última

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