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	Provedor de dados Acta Botanica (1) Ciência Rural (1) Autor Dokkedal,Anne Ligia (2) Almeida,Luiz Fernando Rolim de (1) Cechin,Inês (1) Franco,Danilo Miralha (1) Fumis,Terezinha de Fátima (1) Neto,José de Sousa Lima (1) Saldanha,Luiz Leonardo (1) Santos,Lourdes Campaner dos (1) Mais... Palavra-chave Fabaceae (1) Flavonoids (1) Growth (1) HPLC-PAD-ESI-MS (1) Helianthus annuus (1) Kaempferol-3-O-α-rhamnoside (1) Phenolics (1) Photosynthesis (1) Quercetin-3-O-α-rhamnoside (1) Root growth (1) Mais... Tipo do documento Info:eu-repo/semantics/article (2) Ano 2016 (1) 2007 (1) País Brazil (2) Idioma Inglês (2)		Ordenar por:  Relevância Autor Título Ano Registros recuperados: 2 Primeira ... 1 ... Última Growth and physiological responses of sunflower plants exposed to ultraviolet-B radiation Ciência Rural Cechin,Inês; Fumis,Terezinha de Fátima; Dokkedal,Anne Ligia. The effects of UV-B radiation were studied in sunflower plants (Helianthus annuus L. cv. Catissol-01) growning in greenhouse under natural photoperiod conditions. The plants received approximately 0.60Wm-2 (control) or 4.0Wm-2 (+UV-B) of UV-B radiation for 7h d-1, centered around solar noon from 15 days after sowing. Compared to the control, plants exposed to high UV-B radiation for 12 or 21 days did not show any difference in shoot dry matter, specific leaf weight or UV-B absorbing compounds. Enhanced UV-B radiation caused a significant inhibition of photosynthesis (A) only in the first sampling and this was accompained by reduction in stomatal conductance (g s) and transpiration rate. The inhibition in A can not be fully explained by reduction in g s... Tipo: Info:eu-repo/semantics/article Palavras-chave: Growth; Helianthus annuus; Phenolics; Photosynthesis. Ano: 2007 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0103-84782007000100014 Seasonal variation in allelopathic potential of the leaves of Copaifera langsdorffii Desf. Acta Botanica Franco,Danilo Miralha; Saldanha,Luiz Leonardo; Neto,José de Sousa Lima; Santos,Lourdes Campaner dos; Dokkedal,Anne Ligia; Almeida,Luiz Fernando Rolim de. ABSTRACT The deciduous plant Copaifera langsdorffii contains important medicinal compounds which may also be allelopathic and inhibitory to plant growth. The species is endemic to the Brazilian Cerrado where there is pronounced climatic seasonality. In this study we demonstrate the allelopathic capacity of extracts from the leaves of C. langsdorffii and pre-purified fractions of the extract. Analysis by HPLC-PAD-ESI-MS confirmed the presence of quercetin-3-O-α-rhamnoside and kaempferol-3-O-α-rhamnoside as major components, as well as phenolic acid derivatives of gallic acid. The extracts from samples collected during the wet season were rich in flavonoids and reduced the seed germination rate, root emergence time, and root growth of Sorghum bicolor... Tipo: Info:eu-repo/semantics/article Palavras-chave: Fabaceae; Flavonoids; HPLC-PAD-ESI-MS; Kaempferol-3-O-α-rhamnoside; Quercetin-3-O-α-rhamnoside; Root growth. Ano: 2016 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0102-33062016000200157 Registros recuperados: 2 Primeira ... 1 ... Última

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