Foliar Senescence
Mostrando 13-24 de 29 artigos, teses e dissertações.
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13. Microclimate characterization of the protected environment cultivated with french-beans / Caracterização do microclima de ambiente protegido cultivado com feijão-vagem
The protected environment changes the meteorological elements in its interior related to the outward environment. The french-beans culture is considered a high risk one, being so sensitive to adverse meteorological conditions. The cultivation in protected environment may become viable the production in South Region under unfavorable year period. Due to the e
Publicado em: 2008
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14. INFLUÊNCIA DA APLICAÇÃO DE FERTILIZANTES E FUNGICIDA SOBRE O ENCHIMENTO DE GRÃOS E O DESEMPENHO AGRONÔMICO DO ARROZ IRRIGADO / EFFECT OF FERTILIZERS AND FUNGICIDE APPLICATION ON GRAINS FILLING AND ON RICE CULTURE PERFORMACE
Increasing green leaf duration during grain filling in rice, using management practices to enhance plant nutrition and health, can increase grain yield. To test this hypothesis, two experiments were conducted in 2005/06. The first experiment with the objectives of evaluating the effects of nitrogen (N) and fungicide application at booting stage on 1) the gre
Publicado em: 2007
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15. Leaf area, senescence and uniform development as favorable treits, in the adaptation of maize cultivars with contrasting genetic variability to crowding. / Área foliar, senescência e uniformidade de desenvolvimento na adaptação ao adensamento de plantas de cultivares de milho com bases genéticas contrastantes.
O incremento na densidade de plantas é uma forma de maximizar a interceptação da radiação solar e o rendimento de grãos do milho. Contudo, ele também pode reduzir a atividade fotossintética da planta e a eficiência de conversão dos fotoassimilados à produção de grãos. Aumentos na tolerância de híbridos de milho ao adensamento têm sido report
Publicado em: 2007
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16. Metabolismo do nitrogênio e estado nutricional do cafeeiro (Coffea arabica) / Nitrate reductase and glutamine synthetase activity during coffee plant reproduction
The aim of this work was to evaluate the nitrate reductase (NR) and glutamine synthetase (GS) activity, total soluble protein content (PTS) in coffee leaves during the fruits development in field conditions. The study was carried out in ESALQ/USP (University of São Paulo), Piracicaba, São Paulo, Brazil in a Red Nitosol eutrofic. The experimental design was
Publicado em: 2007
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17. Morphophysiological description of early and late potato clones aiming at adaptation to tropical conditions. / DescriÃÃo morfofisiolÃgica de clones de batata precoces e tardios visando a adaptaÃÃo a condiÃÃes tropicais
The objective of this research was to study the growth, tuberization and dry matter partitioning to tubers of early and late potato clones during the vegetative growth. Besides, it was studied the viability for using morphophysiological traits as parameters to select clones more adapted to tropical conditions. Two clones from each maturity class were used, C
Publicado em: 2006
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18. Growth, crown dynamic and wood quality for sawmill of Eucalyptus grandis [HILL EX MAIDEN] clone submitted to artificial pruning / Crescimento, dinâmica de copa e qualidade da madeira para serraria de clone de Eucalyptus grandis [HILL EX MAIDEN] submetido à desrama artificial
Plants of the clone 24504 of Eucalyptus grandis [HILL ex-MAIDEN] established at 3.0 x 3.0 m spacing, in Southeastern Brazil, were submitted to different artificial pruning intensities starting at two seasons: dry season, with the first pruning intervention occurring in July 2000 in plants aged 20 months and, wet season, with the first pruning intervention oc
Publicado em: 2002
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19. Similarities in Gene Expression during the Postharvest-Induced Senescence of Spears and Natural Foliar Senescence of Asparagus.
Changes in gene expression and tissue composition were investigated during foliar development and natural senescence of asparagus (Asparagus officinalis L.). Three phases in development and senescence of the foliage were characterized: early fern growth, mature fern, and senescence, when a marked loss of chlorophyll, sucrose, and protein occurred and major c
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20. Senescence of Attached Bean Leaves Accelerated by Sprays of Silicone Oil Antitranspirants 1
During an investigation into the use of oil emulsions in foliar sprays, it was found that silicone oil emulsions accelerated the senescence of the primary leaves of bean (Phaseolus vulgaris) plants. It was shown that accelerated senescence was not a result of the reduced transpiration rates found in silicone-sprayed leaves. Furthermore, the silicone oil emul
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21. Studies on the Behavior of the Senescence Signal in Anoka Soybeans 1
Soybean, a monocarpic plant, has been found to undergo rapid senescence as its fruits mature. In soybeans (Glycine max[L.] Merrill) cv. Anoka, foliar senescence begins during the period of most rapid pod-fill (seed growth), and it can be eliminated by surgical removal of the seeds at an early stage of their growth. Experiments in which fruits are removed fro
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22. The Dependence of Stomatal Closure on Protein Synthesis 1
Seven different inhibitors of the synthesis of protein and RNA, all of which are found to delay the senescence of detached oat leaves in darkness, also cause the opening of the stomata in the dark. The concentration ranges for activity on the two processes agree closely. Four other compounds of similar effects on RNA and protein synthesis, but which are inac
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23. Induced Senescence of Intact Wheat Seedlings and Its Reversibility 1
Intact wheat seedlings (Triticum aestivum L.) were induced to senesce by placing them in the dark and at various stages of senescence were placed back in the light and their recoverability observed. Seedlings demonstrated complete recovery of chlorophyll, protein, and rate of photosynthesis after 2 days in the dark, but were unable to recover fully after 4 d
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24. Natural Senescence of Pea Leaves (An Activated Oxygen-Mediated Function for Peroxisomes).
We studied the activated oxygen metabolism of peroxisomes in naturally and dark-induced senescent leaves of pea (Pisum sativum L.). Peroxisomes were purified from three different types of senescent leaves and the activities of different peroxisomal and glyoxysomal enzymes were measured. The activities of the O2-- and H2O2-producing enzymes were enhanced by n