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	Provedor de dados PAB (2) Planta Daninha (1) Rev. Bras. entomol. (1) Autor Dias-Filho,Moacyr Bernardino (2) Dias-Filho,Moacyr B. (1) Fonseca,Nilson G. (1) Kumagai,Alice F. (1) Mielke,Olaf H. H. (1) Palavra-chave Stachytarpheta cayennensis (4) Ipomoea asarifolia (3) Amazonia (2) Allocation patterns (1) Brazil (1) Diversidade (1) Growth analysis (1) Leaf nitrogen (1) Longevity (1) Photosynthesis (1) Sazonalidade (1) Seed (1) Mais... Tipo do documento Info:eu-repo/semantics/article (4) Ano 2006 (1) 1999 (3) País Brazil (4) Idioma Inglês (3) Português (1)		Ordenar por:  Relevância Autor Título Ano Registros recuperados: 4 Primeira ... 1 ... Última Physiological responses of two tropical weeds to shade: I. Growth and biomass allocation PAB Dias-Filho,Moacyr Bernardino. Ipomoea asarifolia (Desr.) Roem. & Schultz (Convolvulaceae) and Stachytarpheta cayennensis (Rich) Vahl. (Verbenaceae), two weeds found in pastures and crop areas in Brazilian Amazonia, were grown in controlled environment cabinets under high (800-1000 µmol m-² s-¹) and low (200-350 µmol m-² s-¹) light regimes during a 40-day period. For both species leaf dry mass and leaf area per total plant dry mass, and leaf area per leaf dry mass were higher for low-light plants, whereas root mass per total plant dry mass was higher for high-light plants. High-light S. cayennensis allocated significantly more biomass to reproductive tissue than low-light plants, suggesting a probably lower ability of this species to maintain itself under shaded conditions.... Tipo: Info:eu-repo/semantics/article Palavras-chave: Allocation patterns; Growth analysis; Amazonia; Ipomoea asarifolia; Stachytarpheta cayennensis. Ano: 1999 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-204X1999000600004 Physiological responses of two tropical weeds to shade: II. Leaf gas exchange and nitrogen content PAB Dias-Filho,Moacyr Bernardino. Ipomoea asarifolia (Desr.) Roem. & Schultz (Convolvulaceae) and Stachytarpheta cayennensis (Rich) Vahl. (Verbenaceae), two weeds found in pastures and crop areas in the Brazilian Amazonia, Brazil, were grown in controlled environment cabinets under high (800-1000 µmol m-² s-¹) and low (200-350 µmol m-² s-¹) light regimes during a 40-day period. The objective was to determine the effect of shade on photosynthetic features and leaf nitrogen content of I. asarifolia and S. cayennensis. High-irradiance grown I. asarifolia leaves had significantly higher dark respiration and light saturated rates of photosynthesis than low-irradiance leaves. No significant differences for these traits, between treatments, were observed in S. cayennensis. Low-irradiance... Tipo: Info:eu-repo/semantics/article Palavras-chave: Photosynthesis; Leaf nitrogen; Amazonia; Ipomoea asarifolia; Stachytarpheta cayennensis. Ano: 1999 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-204X1999000600005 Potential for seed bank formation of two weed species from Brazilian Amazonia Planta Daninha Dias-Filho,Moacyr B.. The potential for seed bank formation of two perennial weed species, Ipomoea asarifolia (Desr.) Roem. & Schult. (Convolvulaceae) and Stachytarpheta cayennensis (Rich.) M. Vahl (Verbenaceae), both common in Amazonia , was evaluated in a degraded pasture area in eastern Brazilian Amazonia . Seeds were enclosed in nylon mesh packets and placed at the soil surface or buried at 5 or 10 cm deep. The number of viable seeds was recorded at 6, 10, 14 and 18 months after burial. Results showed that S. cayennensis has the ability to form persistent soil seed bank, while I. asarifolia seeds do not build up in the soil seed bank. For S. cayennensis and, to some extent, for I. asarifolia, seed survival was highest at greater burial depths. Tipo: Info:eu-repo/semantics/article Palavras-chave: Brazil; Seed; Longevity; Stachytarpheta cayennensis; Ipomoea asarifolia. Ano: 1999 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-83581999000200002 Lepidópteros visitantes florais de Stachytarpheta cayennensis (Rich.) Vahl (Verbenaceae) em remanescente de Mata Atlântica, Minas Gerais, Brasil Rev. Bras. entomol. Fonseca,Nilson G.; Kumagai,Alice F.; Mielke,Olaf H. H.. Foram analisadas a composição e sazonalidade da comunidade de lepidópteros visitantes florais de S. cayennensis na Estação Ambiental de Peti. Registrou-se a visita de 445 lepidópteros pertencentes a 98 espécies, distribuídos em 6 famílias: Hesperiidae (81,8%), Pieridae (10,8%), Lycaenidae (3,6%), Nymphalidae (2,2%), Papilionidae (1,3%) e Sesiidae (0,3%). Os hesperídeos também apresentaram a maior riqueza, com 70 espécies amostradas. Das espécies amostradas, apenas quatro tiveram abundância relativa acima de 5% (Pyrgus orcus (Stoll, 1780), Pompeius pompeius (Latreille, [1824]), Urbanus dorantes dorantes (Stoll, 1790) e Corticea corticea (Plötz, 1882)). De acordo com a classificação de Palma, duas espécies foram comuns, 12 intermediárias e 84 foram... Tipo: Info:eu-repo/semantics/article Palavras-chave: Diversidade; Sazonalidade; Stachytarpheta cayennensis. Ano: 2006 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0085-56262006000300010 Registros recuperados: 4 Primeira ... 1 ... Última

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