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| Furlani,Ângela Maria Cangiani; Furlani,Pedro Roberto; Tanaka,Roberto Tetsuo; Mascarenhas,Hipólito Assunção Antonio; Delgado,Margarida das Dores Paes. |
| Plant efficiency for phosphorus uptake and utilization may contribute to improve crop yield potential in situations of low P availability. Twenty nine soybean [Glycine max (L.) Merr.] cultivars were evaluated and classified in relation to the response to phosphorus (P) levels in nutrient solution. P uptake and use efficiency were estimated by the variables: shoot and root dry matter (DM) yield, P-concentrations and contents in plant parts and P-efficiency index (EI). The experiment was conducted in a greenhouse, during 1999, at Campinas, State of São Paulo, Brazil. The experimental design consisted of randomized complete blocks, arranged in split-plots, with three replications. The main plots were the P levels in the nutrient solution (64.5; 129; 258 and... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Glycine max (L.) Merr.; Cultivar; P-efficiency index; P-uptake; P-use. |
| Ano: 2002 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0103-90162002000300018 |
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| Furlani,Ângela Maria Cangiani; Carvalho,Cristiane Pierrotte; Freitas,José Guilherme de; Verdial,Marcelo Fontanetti. |
| Field symptoms of open spikelets in wheat were observed in specific cultivars and supposedly related to low B soils and differential B requirement among cultivars. This study aimed to evaluate the response of four wheat (Triticum aestivum L.) cultivars, IAC 24, IAC 60, IAC 287 and IAC 289, to increasing B concentrations in nutrient solution. The experiment was set up in a randomized complete block design, with four replicates and five B concentrations (0.0, 0.05, 0.2, 0.8 and 2.0 mg L-1), during 1997/1998, in a greenhouse. Plants were grown to maturity and evaluated for plant height, spike number and length, open spikelet number, grains per spike, plant parts dry matter, B, P, K, Ca and Mg leaf concentrations and total nutrient contents. The visual... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Triticum aestivum L.; Boron nutrition; Leaf B concentrations; Critical limits. |
| Ano: 2003 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0103-90162003000200022 |
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| Furlani,Ângela Maria Cangiani; Furlani,Pedro Roberto; Meda,Anderson Rotter; Duarte,Aildson Pereira. |
| Zinc deficiency usually occurs in maize grown in Brazilian acidic soils. The aim of this study was to evaluate commercial maize cultivars for their Zn uptake and utilization efficiency. A greenhouse experiment using nutrient solution with young plants was carried out at Campinas, State of São Paulo, Brazil, in 2002. Treatments consisted of: 0.0; 0.1; 0.2; 0.4 and 0.8 mg L-1 Zn in the main plots and 24 commercial maize cultivars in the subplots, in a randomized complete block design. Zn concentration in shoot dry matter (SDM) ranged from 28.4 to 41.6 mg kg-1 among cultivars, clearly indicating a dilution effect, since a negative relation between SDM and plant height was shown. Total Zn-shoot content was a good parameter to discriminate cultivars, once... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Zea mays L.; Zn-efficiency; Zn uptake; Zn-deficiency; Commercial cultivars. |
| Ano: 2005 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0103-90162005000300010 |
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| Machado,Cynthia Torres de Toledo; Furlani,Ângela Maria Cangiani. |
| Interspecific and intraspecific differences in the efficiency of utilization of soil phosphorus (P) are explained, in part, by plant morphological and physiological variations, which characterize the plant for nutrient acquisition. As part of a study on maize genotypes characterization for P-uptake and use efficiency, kinetic parameters of P uptake and root morphological characters were evaluated for six local and improved maize varieties, grown in nutrient solution. The kinetic parameters related to P influx were: maximal transport rate (Vmax), the Michaelis-Menten constant (Km), and the external concentration when net uptake is zero (Cmin). Measured root morphological characters were: root length, radius, and surface area. Shoot and root dry matter yield... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Genetic variability; Phopshorus acquisition; Kinetics parameters; Root system; Nutritional efficiency. |
| Ano: 2004 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0103-90162004000100012 |
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| Stancato,Giulio Cesare; Abreu,Mônica Ferreira; Furlani,Ângela Maria Cangiani. |
| Este trabalho foi desenvolvido com o objetivo de estudar o efeito das polpas de frutas no crescimento de plântulas de orquídeas in vitro. Três espécies de orquídeas epífitas brasileiras foram usadas: Laelia longipes Rchb.f., Laelia tenebrosa Rolfe e Miltonia spectabilis (Lindley). Os seguintes meios nutritivos foram testados: 10:10:10 (N:P:K), na concentração de 1 g L-1, 10:30:20, 1 g L-1, polpa de maçã, 10,0 g L-1, polpa de tomate, 10 g L-1, polpa de banana, 50 g L-1, e também os meios de KNUDSON, VACIN e WENT, MURASHIGE e SKOOG. Nas plântulas de L. longipes, cultivadas em 10:10:10 e polpa de banana observou-se o maior acúmulo de, massa e naquelas cultivadas em MS o menor. Pela análise dos resultados para Miltonia spectabilis observou-se que os meios... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Meios nutritivos; Micropropagação; Nutrição in vitro. |
| Ano: 2008 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0006-87052008000100006 |
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