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	Provedor de dados Acta Botanica (2) Autor Baeza,M. Jaime (1) Bicalho,Elisa Monteze (1) Fidelis,Alessandra (1) Garcia,Queila Souza (1) Gorgone-Barbosa,Elizabeth (1) Pivello,Vânia R. (1) Santos,Talita R. Silva dos (1) Mais... Palavra-chave Physiological dormancy (2) Breaking-dormancy (1) Cerrado (1) Fire (1) Germination percentage (1) Haustorium (1) Hormones (1) Invasive species (1) Operculum (1) Palm seeds (1) Reactive oxygen species (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 2019 (1) 2016 (1) País Brazil (2) Idioma Inglês (2)		Ordenar por:  Relevância Autor Título Ano Registros recuperados: 2 Primeira ... 1 ... Última 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 Abscisic acid and the antioxidant system are involved in germination of Butia capitata seeds Acta Botanica Bicalho,Elisa Monteze; Santos,Talita R. Silva dos; Garcia,Queila Souza. ABSTRACT Seed germination is an important step for plants without vegetative propagation and is a physiological process that begins with specific environmental cues resulting in biochemical responses. Breaking-dormancy is necessary to study germination in dormant seeds with asynchronous germination. We investigated the processes of breaking dormancy and germination of Butia capitata (Arecaceae) seeds, in which germination is slow and asynchronous, by operculum removal. This treatment increased germination of B. capitata to 90 %. Embryos of dry, imbibed, 24-hours post-operculum removal and early-germinated seeds were collected for biochemical analysis of the following: quantification of abscisic acid (ABA) and hydrogen peroxide (H2O2), activities of... Tipo: Info:eu-repo/semantics/other Palavras-chave: Breaking-dormancy; Haustorium; Hormones; Palm seeds; Operculum; Physiological dormancy; Reactive oxygen species. Ano: 2019 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0102-33062019000100174 Registros recuperados: 2 Primeira ... 1 ... Última

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