Mature Leaves Source
Mostrando 1-12 de 36 artigos, teses e dissertações.
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1. An Appraisal on the Source-to-Sink Relationship in Plants: an Application of Desorption Electrospray Ionization Mass Spectrometry Imaging
Amino acids/ureides and carbohydrates are the main nutrients for the plants growth. These metabolites are continuously translocated through the plant organism via well-known transportation mechanisms. The well-established source-to-sink relationship involves the transfer of these nutrients from mature (source) to young (sink) leaves. Desorption electrospray
J. Braz. Chem. Soc.. Publicado em: 2018-01
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2. Avaliação de fontes, absorção foliar e translocação de zinco (68Zn) em laranjeiras / Sources evaluation, foliar uptake and zinc translocation (68Zn) in Orange
Studies of zinc fertilization on citrus foliar developed in Brazil are mostly limited to information of the nutrients quantities absorbed by the leaves, but the zinc transport of the leaves to other parts of the plants need to be clarified. Most investigations on this subject is vast array of conflicting results. As a result, the use of stable isotope techni
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 28/09/2012
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3. Avaliação de métodos de enxertia em mudas de mangabeira.
RESUMO: Este trabalho foi conduzido no viveiro da Embrapa Cerrados, em Planaltina (DF), com o objetivo de avaliar a viabilidade da enxertia de mudas de mangabeira (Hancornia spp.) pelos métodos de garfagem lateral à inglesa simples, borbulhia de placa com janela aberta e borbulhia de escudo com lenho. A realização da enxertia ocorreu durante a estação
Planaltina. Publicado em: 2011
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4. Avaliação de métodos de enxertia em mudas de pequizeiro.
RESUMO: Este trabalho foi conduzido no viveiro da Embrapa Cerrados, em Planaltina (DF), com a reealização da enxertaria durante a estação chuvosa de verão. Teve como objetivo avaliar a viabilidade da enxertaria de mudas de pequizeiro (Caryocar brasiliense Camb.) pelos métodos de garfagem lateral ou à inglesa simples, borbulhia de placas sem lenho e co
Planaltina. Publicado em: 2011
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5. Absorção, eficiência de uso e partição do fósforo em plantas cítricas / Uptake, use and partitioning of phosphorous in citrus plants
The low phosphorus (P) availability is often a growth-limiting to a number of crops growing in Brazil, including citrus plants. Therefore, we expected that studies about P citrus nutrition could be useful to improve the management of these plants at low-P soils. Therefore, four experiments were carried out under greenhouse conditions. As strategy, acid phosp
Publicado em: 2010
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6. Longevidade foliar, compostos fenolicos e nitrogenados em arvores e lianas de um fragmento de Cerrado na Estação Experimental de Itirapína, São Paulo / Leaf life span, nitrogenous and phenolic compunds in trees and lianas from a Cerrado fragment in the Itirapina experimental station in São Paulo
Trees and lianas present different strategies for allocating resources during the phonological cycle. Whereas Lianas are important floristic components and account for a significant number of rainforest species, few studies have been conducted in the Cerrado (a savanna like vegetation) biome. The duration of the leaf life span in different species reflects b
Publicado em: 2010
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7. In vitro culture and somatic embryogenesis of zygotic embryos of macaúba (Acrocomia aculeata (Jacq). Loddiges) / Cultivo in vitro e embriogênese somática de embriões zigóticos de macaúba (Acrocomia aculeata (Jacq). Loddiges)
The objectives of this work were to propose the proceeds regarding the culture of embryos and induction of somatic embryogenesis of the Acrocomia aculeata palm tree using as explants source the mature and immature zygotic embryos. In the in vitro embryo culture the following were studied: a) the effect of the incubation conditions and of the activated charco
Publicado em: 2008
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8. Fenóis totais no cafeeiro em razão das fases de frutificação e do clima. / Total phenols in the coffee tree due to the fructification phases and the climate.
The vegetables show a natural defense against external factors, biotic and abiotic, by the synthesis of the phenolic compounds in the secondary metabolism, which varies with the maturity state and with the climate. The increase of phenolic compounds in the plants is directly related to the resistance to the infection thought pathogens and insect infestation.
Publicado em: 2005
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9. Combinações de doses de fósforo e de zinco em solução nutritiva para o Capim-Tanzânia / Combinations of phosphorus and zinc rates in nutrient solution for Tanzânia grass
Pastures are the main food source for de cattle in Brazil, and the grasses occupy most of them. Among the species in those pastures, Panicum maximum is preferred for its productivity and quality. In order to establish and maintain the pastures, it is necessary to supply nutrients in balanced amounts. The objective of this study was to determine the Panicum m
Publicado em: 2005
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10. Incorporation of 14C-Photosynthate into Major Chemical Fractions of Source and Sink Leaves of Cottonwood
The incorporation and distribution of photosynthetically fixed 14CO2 was followed for 48 hours in a recently matured source leaf (LPI 7) and in young expanding source and sink leaves (LPI 4) of cottonwood (Populus deltoides Bartr.). The major chemical constituents of leaf laminae and petioles were separated by sequential solvent extractions and enzyme hydrol
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11. Photosynthetic Capacity Is Differentially Affected by Reductions in Sedoheptulose-1,7-Bisphosphatase Activity during Leaf Development in Transgenic Tobacco Plants1
The impact of reduced sedoheptulose-1,7-bisphosphatase (SBPase) activity on photosynthetic capacity and carbohydrate status was examined during leaf expansion and maturation in antisense transgenic tobacco (Nicotiana tabacum L. cv Samsun) plants. In wild-type plants, photosynthetic capacity was lowest in young expanding leaves and reached a maximum in t
American Society of Plant Physiologists.
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12. Calcium Transport in Apple Trees
45Ca, applied to roots of apple seedlings, moved readily to the developing leaves. Kinetin, benzyladenine, and B sprays increased movement. NO3− as the source of N increased movement and accumulation of Ca into mature leaves; NH4+ increased movement into new leaves. Translocation in the stem is effected by a nonspecific ion exchange. Any divalent cation ca