Chlorophylls
Mostrando 25-36 de 142 artigos, teses e dissertações.
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25. Diagnóstico de doenças de citros utilizando espectroscopia de fluorescência / Diagnosis of citrus diseases using fluorescence spectroscopy
Currently the largest portion of money applied to citriculture focus on health of the orchard. The phytosanitary costs, along with fertilizers, exceed 60% of the production cost. The control of diseases such as Sudden Death of Citrus (SDC), Decline and Greening, also known as Huanglongbing, is done by visual inspection, which confers to the method a high lev
Publicado em: 2008
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26. Physiological, anatomical and essential oil characteristics of Melissa officinalis L. (Lamiaceae), in function of organic manure, intensity and quality of the light / CARACTERÃSTICAS ANATÃMICAS, FISIOLÃGICAS E DE ÃLEOS ESSENCIAIS DE Melissa officinalis L. (LAMIACEAE), EM FUNÃÃO DA ADUBAÃÃO ORGÃNICA, INTENSIDADE E QUALIDADE DE LUZ
Objetivou-se com esta pesquisa avaliar o efeito da adubaÃÃo orgÃnica, da intensidade e da qualidade de luz em caracterÃsticas fisiolÃgicas, anatÃmicas e de Ãleos essenciais de Melissa officinalis L (experimentos I, II e III). Os tratamentos dos experimentos consistiram em: emprego da adubaÃÃo orgÃnica com a aplicaÃÃo de 0, 30, 60, 90 e 120 t de e
Publicado em: 2008
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27. Mecanismo de defesa e recuperação da fotossintese em Centrolobium tomentosum sob condições de estresse induzido por SO2 / Mechanism of defense and recovery of photosynthesis in Centrolobium tomentosum under conditions of stress induced by SO2
Large quantities of gaseous pollutants emited by urban-industrial areas emit contribute to the degradation of ecosystems with subsequent declines in vegetation. The photosynthesis is one of the first processes altered by the action of these pollutants and sulphur dioxide (SO2), as one of the most common and harmful air pollutants, drastically affect the phot
Publicado em: 2008
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28. Germination, vigor of seeds and growth of tomatos seedlings in different nutritional conditions / Germinação, vigor de sementes e crescimento de plântulas de tomateiro sob diferentes condições nutricionais
The experiment was carried in the laboratory of seeds and the greenhouse of the Department of Botany, Universidade Federal de Pelotas. The research was done with objective to evaluate and to describe the effect of different nutritional solutions on the germination, the vigor of the seeds and growth of tomato seedlings. The experimental design was entirely ra
Publicado em: 2007
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29. Effect of metallic pollutants in marine algae pigments contents and evaluation of carotenes structural features in mimetic membranes / Efeito de poluentes metálicos nos níveis de pigmentos fotossintéticos presentes em algas marinhas e avaliação do papel estrutural de carotenos em membranas miméticas
This work involves the study of the levels of photosynthetic pigments, carotenoids and chlorophylls, contained in the marine algae Tetraselmis gracilis and Gracilaria tenuistipitata, under conditions of cellular senescence and anthropogenic stress (metallic pollution). Due to the fundamental organizational role of carotenoids in thylakoid membranes, its stru
Publicado em: 2007
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30. RETENÃÃO DE CLOROFILA E SEUS EFEITOS SOBRE A QUALIDADE FISIOLÃGICA DE SEMENTE DE SOJA / Chlorophyll retention and its effects on physiological quality of soybean seed
This study was composed by three experiments related to the effects of chlorophyll retention in soybean seeds. The first one determined the effects of water deficit and high temperature stresses during maturation on the expression level of green seeds. The second evaluated the susceptibility of different genotypes to the expression of this problem. The third
Publicado em: 2006
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31. 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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32. Tolerância à dessecação em Pleurostima purpurea (Velloziaceae): trocas gasosas, pigmentos fotossintéticos e conteúdo relativo de água foliar / Desiccation tolerance in Pleurostima purpurea (Velloziaceae): gas exchanges, photosynthetic pigments and leaf relative water content
Pleurostima purpurea (Velloziaceae) é uma espécie rupícola encontrada em afloramentos rochosos do estado do Rio de Janeiro, sudeste do Brasil. Por apresentar notável capacidade de tolerar a dessecação vegetativa, este estudo teve o intuito de esclarecer detalhes sobre a estratégia ecofisiológica utilizada por tais plantas frente à desidratação do
Publicado em: 2005
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33. Feijão-de-porco [Cnavalia ensiformis (L.) D.C.] cultivado com diferentes fontes de nitrogenio : fixação de N2, fotossintese e crescimento
Several reports point to a negative effect of mineral N on the fonnation and activity of root nodules in legumes that fix the N2 by simbiotic association with rizobia. However, there are few studies establishing a relation between aspects ofthe photosynthesis and the source of N. In this study, an investigation was carried out to verify the influence of the
Publicado em: 2004
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34. Caracterización de acelga fresca de Santiago del Estero (Argentina). Comparación del contenido de nutrientes en hoja y tallo. Evaluación de los carotenoides presentes
An integrated characterization study of Swiss chard grown in Santiago del Estero, Argentina, was carried out. As Swiss chard is a vegetable of important regional consumption, the determination of its basic constituents, minerals and pigments was done to appraise the nutritional value offered by this food in our area. Moisture, ash content, proteins, fats, av
Food Science and Technology. Publicado em: 2003-04
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35. Utilização da reflectância espectral para a estimativa de pigmentos fotossintéticos em dosséis de soja [Gycine Max (.L), Merril] / Soybean canopy [Glycine max (L.), Merril photosynthetic pigments estimation by measns of spectral reflectance
Os pigmentos fotossintéticos são essenciais para o desenvolvimento das plantas, pois são responsáveis pela captura da energia solar incidente usada na fotossíntese. Com o desenvolvimento do sensoriamento remoto hiperespectral, tem-se aberto a possibilidade de quantificar estes pigmentos individualmente em grandes extensões de lavouras agrícolas e esta
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 200203
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36. Soybean canopy [Glycine max (L.), Merril photosynthetic pigments estimation by measns of spectral reflectance / Utilização da reflectância espectral para a estimativa de pigmentos fotossintéticos em dosséis de soja [Gycine Max (.L), Merril]
Photosynthetic pigments are essential for plant development, because they are responsible for the incident solar energy absorption used in photosynthesis. Individually quantifying these pigments in great extensions of agricultural crops has been made possible by hyperspectral remote sensing development and these information can be used to produce a more accu
Publicado em: 2002