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	Provedor de dados Acta Botanica (4) Autor Gandolfi,Sergius (2) Rodrigues,Ricardo Ribeiro (2) Souza,Flaviana Maluf (2) Cruz Neto,Oswaldo (1) Figueira,José Eugênio Côrtes (1) Jacobi,Claudia Maria (1) Leal,Inara Roberta (1) Lopes,Ariadna Valentina (1) Mourão,Fabiana Alves (1) Perez,Sonia Cristina Juliano Gualtieri de Andrade (1) Pinheiro,Rafael Barros Pereira (1) Santos,Jean Carlos (1) Mais... Palavra-chave Plant-plant interaction (4) Allelopathy (1) Caatinga (1) Canga (1) Cuscuta partita (1) Environmental heterogeneity (1) Facilitation (1) Floral traits (1) Germination (1) Growth (1) Haustoria (1) Holoparasitic plants (1) Inhibition (1) Iron Quadrangle (1) Ironstone outcrop (1) Parasitism (1) Pollen viability (1) Rarefaction (1) Reproductive success (1) Species richness (1) Mais... Tipo do documento Info:eu-repo/semantics/article (3) Info:eu-repo/semantics/other (1) Ano 2017 (1) 2016 (1) 2015 (1) 2010 (1) País Brazil (4) Idioma Inglês (4)		Ordenar por:  Relevância Autor Título Ano Registros recuperados: 4 Primeira ... 1 ... Última Species-specific associations between overstory and understory tree species in a semideciduous tropical forest Acta Botanica Souza,Flaviana Maluf; Gandolfi,Sergius; Rodrigues,Ricardo Ribeiro. We investigated the occurrence of associations between overstory and understory tree species in a semideciduous tropical forest. We identified and measured all trees of nine canopy species with diameter at breast height ≥4.8 cm in a 10.24 ha plot and recorded all individuals beneath their canopies ("understory individuals") within the same diameter class. The total density of understory individuals did not significantly differ under different overstory species. One overstory species (Ceiba speciosa) showed higher understory species richness compared with five other species. There was a strong positive association between three overstory species (Esenbeckia leiocarpa, Savia dictyocarpa, and C. speciosa) and the density of seven understory species... Tipo: Info:eu-repo/semantics/article Palavras-chave: Environmental heterogeneity; Facilitation; Plant-plant interaction; Rarefaction; Species richness. Ano: 2015 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0102-33062015000100073 Allelopathic potential of bark and leaves of Esenbeckia leiocarpa Engl. (Rutaceae) Acta Botanica Souza,Flaviana Maluf; Gandolfi,Sergius; Perez,Sonia Cristina Juliano Gualtieri de Andrade; Rodrigues,Ricardo Ribeiro. We investigated the inhibitory potential of aqueous extracts of bark and leaves of Esenbeckia leiocarpa Engl. on lettuce germination and early seedling growth. We compared the effects of four concentrations (100, 75, 50 and 25%) of each extract to water and polyethylene glycol (PEG 6000) solution controls for four replicates of 50 seeds for germination and four replicates of ten seedlings for seedling growth. The inhibitory effects of E. leiocarpa extracts on the percentage of germination and on the germination speed seemed to be more than simply an osmotic effect, except for the percentage of seeds germinated in bark extracts. When compared to water control, both bark and leaf extracts delayed germination, and leaf extracts also affected the percentage of... Tipo: Info:eu-repo/semantics/article Palavras-chave: Allelopathy; Germination; Growth; Inhibition; Plant-plant interaction. Ano: 2010 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0102-33062010000100016 A holoparasitic plant severely reduces the vegetative and reproductive performance of its host plant in the Caatinga, a Brazilian seasonally dry forest Acta Botanica Cruz Neto,Oswaldo; Leal,Inara Roberta; Santos,Jean Carlos; Lopes,Ariadna Valentina. ABSTRACT Host-parasite interactions between plants may reduce the vegetative and reproductive performance of the host plant. Although it is well established that parasitic plants may negatively affect the metabolism and the number of vegetative/reproductive structures of their hosts, the effects of this interaction on the reproductive characteristics of the host plant are poorly understood. Here we document the interaction between Cuscuta partita (Convolvulaceae) and its main host, Zornia diphylla (Fabaceae), in the Caatinga of northeastern Brazil. We measured diverse reproductive/vegetative attributes of Z. diphylla in 60 plots randomly distributed in patches that were parasitized and not parasitized by C. partita. Both vegetative and reproductive... Tipo: Info:eu-repo/semantics/other Palavras-chave: Caatinga; Cuscuta partita; Floral traits; Haustoria; Holoparasitic plants; Plant-plant interaction; Pollen viability; Reproductive success; Zornia diphylla. Ano: 2017 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0102-33062017000100147 Host preference of the hemiparasite Struthanthus flexicaulis (Loranthaceae) in ironstone outcrop plant communities, southeast Brazil Acta Botanica Mourão,Fabiana Alves; Pinheiro,Rafael Barros Pereira; Jacobi,Claudia Maria; Figueira,José Eugênio Côrtes. Struthanthus flexicaulis is a hemiparasite abundant in ironstone outcrops in southeast Brazil. We evaluated its host preference among species of the plant community, taking into account the abundance and foliage cover of the hosts. The importance of each species in the community and the mortality caused by the parasite were assessed based on a quantitative survey in 10 strips measuring 1m x 50m. The 10,290 individuals belonged to 42 species. Only 15 had a relative abundance in the plant community greater than 1%, of which 12 showed vestiges of parasitism. More than 80% of deaths in the community were associated with parasitism. Non-infected individuals had significantly less mortality rates (7%) than those infected (83%) (²= 1102.4, df = 1, p < 0.001).... Tipo: Info:eu-repo/semantics/article Palavras-chave: Canga; Iron Quadrangle; Ironstone outcrop; Plant-plant interaction; Parasitism. Ano: 2016 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0102-33062016000100041 Registros recuperados: 4 Primeira ... 1 ... Última

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