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| Seganfredo,Rivelino; Finger,Fernando Luis; Barros,Raimundo S.; Mosquim,Paulo R.. |
| O presente experimento teve por objetivo avaliar a influência do momento de colheita sobre a vida de prateleira de folhas de taioba (Xanthosoma sagittifolium) clone Mangarito Roxo. As folhas foram colhidas 5; 8 e 15 dias após a completa expansão do limbo foliar, para determinação de largura, comprimento, teores de oxalato de cálcio, açúcares solúveis totais, amido e clorofila total. As folhas foram armazenadas no escuro, à temperatura de 25ºC e umidade relativa de 95%, até o completo amarelecimento do limbo. Procederam-se, no intervalo, determinações físicas e químicas. Folhas colhidas aos 5; 8 e 15 dias tiveram comprimento e largura semelhantes. Os teores de oxalato de cálcio decresceram significativamente com a idade. Folhas mais velhas exibiram menor... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Xanthosoma sagittifolium; Açúcares solúveis; Amido; Clorofila; Oxalato. |
| Ano: 2001 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0102-05362001000300004 |
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| Reis Jr.,Ronaldo; Lima,; Vilela,Evaldo F.; Barros,Raimundo S.. |
| To accomplish systematic studies with coffee leafminer, it is necessary to establish a mass rearing system under artificial conditions. It is possible to rear this species, from egg to adult, under laboratory conditions, without using coffee seedlings but detached leaves maintained in vitro. Synthetic cytokinins are routinely used for maintenance of plant cell and plant tissues in vitro. Two plant growth regulators, benzyladenin and kinetin, in concentrations 10-6 and 10-7 M were used to mantain the leaves. Green leaves collected in the field were maintained in the solution to be tested. Distilled water served as control. The experiment lasted 30 days, a period longer than the necessary for the complete development of the insect. Both artificial... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Insecta; Cytokinine; Leafminer. |
| Ano: 2000 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0301-80592000000400030 |
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| DaMatta,Fábio M.; Ronchi,Cláudio P.; Maestri,Moacyr; Barros,Raimundo S.. |
| After oil, coffee is the most valuable traded commodity worldwide. In this review we highlighted some aspects of coffee growth and development in addition to focusing our attention on recent advances on the (eco)physiology of production in both Coffea arabica and C. canephora, which together account for 99% of the world coffee bean production. This review is organized into sections dealing with (i) climatic factors and environmental requirements, (ii) root and shoot growth, (iii) blossoming synchronisation, fruiting and cup quality, (iv) competition between vegetative and reproductive growth and branch die-back, (v) photosynthesis and crop yield, (vi) physiological components of crop yield, (vii) shading and agroforestry systems, and (viii) high-density... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Arabica conilon and robusta coffee beverage quality density planting die-back flowering photosynthesis; Shading. |
| Ano: 2007 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1677-04202007000400014 |
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