Consulta: subjectFacets:"Leaf fall"
Registros recuperados: 5
Data/hora: 02/06/2024 14:52:29

Fenologia da copaíba (Copaifera langsdorffii Desf. -- Leguminosae, Caesalpinioideae) em uma floresta semidecídua no sudeste do Brasil
Provedor de dados: 88
Autores: PEDRONI,FERNANDO; SANCHEZ,MARYLAND; SANTOS,FLAVIO A.M.
A fenologia da emissão foliar, floração e frutificação para espécies de florestas tropicais é pouco conhecida, embora estes ecossistemas apresentem grande diversidade de padrões fenológicos. Foi estudada, de fevereiro de 1991 a abril de 1993, a fenologia da copaíba (Copaifera langsdorffii Desf.) na Reserva de Santa Genebra. Foram feitas observações em 36 indivíduos e analisadas queda de folhas, brotamento, floração e frutificação. A queda de folhas e o brotamento foram as fenofases mais sincronizadas dentro da população. Estes eventos ocorreram no final da estação seca (queda de folhas) e início da estação chuvosa (brotamento) e foram relacionados principalmente com a precipitação. A floração ocorreu na estação chuvosa e a frutificação na estação seca. A...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Seasonality; Leaf fall; Leaf flushing; Flowering; Fruiting.
Ano: 2002
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-84042002000200007

Reproductive phenology differs between evergreen and deciduous species in a Northeast Brazilian savanna
Provedor de dados: 39
Autores: Lacerda,Dinnie Michelle Assunção; Rossatto,Davi Rodrigo; Ribeiro-Novaes,Éville Karina Maciel Delgado; Almeida Jr.,Eduardo Bezerra de.
ABSTRACT Evergreen (EG) and deciduous (DEC) species exhibit distinct strategies to overcome dry periods and achieve adequate water status for reproduction and growth. Such particularities may result in distinct reproductive strategies between these groups. Thus, we evaluated the phenology of EG and DEC groups, comparing and differentiating their reproductive phenophases in an area of Brazilian savanna (cerrado sensu stricto), located in Mirador State Park, Maranhão State, by associating these patterns with leaf fall and flushing. Leaf fall, leaf flushing, flowering and fruiting data were monitored between April 2014 and March 2016 for 12 EG and 13 DEC species. To assess differences in flowering and fruiting patterns between EG and DEC, we compared...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Cerrado; Flowering; Fruiting; Leaf fall; Leaf flushing; Leaf habit.
Ano: 2018
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0102-33062018000300367

Manihot leaf abscission induced by ethrel
Provedor de dados: 1
Autores: Brito, Carmem Lacerda Lemos; Matsumoto, Sylvana Naomi; Oliveira, Luan Santos de; Moreira, Gabriela Luz Pereira; Santos, Jerffson Lucas; Viana, Anselmo Eloy Silveira.
 This study aimed to assess the impact of ethrel spraying on cassava leaf abscission at different stages of cultivar development. Two experiments were performed using randomized block designs, with 15 total treatments (three repetitions of five conditions) arranged according to the factorial scheme 3 x 5. Experiment 1 (ethrel application in the vegetative development period) consisted of three seasons (November 2013 and 2014, January and February 2014) and four concentrations of ethrel (1,500, 3,000, 4,500, and 6,000 ppm) and a control (no application); Experiment 2 (application in pre-harvest period) consisted of three periods of ethrel spraying (20, 40, and 60 days before harvest), four ethrel concentrations (1,500, 3,000, 4,500, and 6,000 ppm) and a...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Mandiocultura; Fisiologia vegetal; Desenvolvimento da cultura ManihotesculentaCrantz; Leaf fall; Plant growth regulator. Impacto da abscisão foliar de mandioca induzida por ethrel.
Ano: 2018
URL: http://periodicos.uem.br/ojs/index.php/ActaSciAgron/article/view/36540

Manihot leaf abscission induced by ethrel
Provedor de dados: 1
Autores: Brito, Carmem Lacerda Lemos; Matsumoto, Sylvana Naomi; Oliveira, Luan Santos de; Moreira, Gabriela Luz Pereira; Santos, Jerffson Lucas; Viana, Anselmo Eloy Silveira.
 This study aimed to assess the impact of ethrel spraying on cassava leaf abscission at different stages of cultivar development. Two experiments were performed using randomized block designs, with 15 total treatments (three repetitions of five conditions) arranged according to the factorial scheme 3 x 5. Experiment 1 (ethrel application in the vegetative development period) consisted of three seasons (November 2013 and 2014, January and February 2014) and four concentrations of ethrel (1,500, 3,000, 4,500, and 6,000 ppm) and a control (no application); Experiment 2 (application in pre-harvest period) consisted of three periods of ethrel spraying (20, 40, and 60 days before harvest), four ethrel concentrations (1,500, 3,000, 4,500, and 6,000 ppm) and a...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: ManihotesculentaCrantz; Leaf fall; Plant growth regulator.; Impacto da abscisão foliar de mandioca induzida por ethrel.
Ano: 2018
URL: http://periodicos.uem.br/ojs/index.php/ActaSciAgron/article/view/36540

Environmental drivers of leaf phenology in trees of the tropical species Ficus obtusifolia
Provedor de dados: 61
Autores: Ballestrini,Caín; Tezara,Wilmer; Herrera,Ana.
Vegetative as well as reproductive phenology of tropical trees frequently occur synchronously at the end of the dry season. It has been repeatedly observed on two individuals of the tropical species Ficus obtusifolia growing in Caracas that they lose their entire foliage in a period of 48 h during the dry season and renew it within the next 72 h. In order to gain knowledge on the mechanisms that govern leaf exchange in F. obtusifolia, we followed in these two individuals the seasonal changes in leaf and fruit phenology, water relations and environmental variables, and in another 25, phenology only. Although foliar exchange was always observed before the rainy season, it also occurred near the end of the rainy season. An increase in leaf turgor potential of...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Brevi-deciduous; Day length; Leaf fall; Sap flow velocity; Water relations.
Ano: 2011
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1677-04202011000200003