Conifers
Mostrando 13-24 de 69 artigos, teses e dissertações.
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13. Sun-earth relationship studied by tree growth rings in conifers from holocene and triassic / Relação sol-terra estudada através de anéis de crescimento de coníferas do holoceno recente e do triássico
The study of the Sun and of its energy flux variations is recent and fully experimental. For this reason , if is very important develop studies in order to understand the past and predict the future using natural records at the Earth surface to monitor solar variations and their effects on climate. The studies about the Sun s variations and Sun-Earth-Climate
Publicado em: 2006
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14. A Floricaula/Leafy gene homolog is preferentially expressed in developing female cones of the tropical pine Pinus caribaea var. caribaea
In angiosperms, flower formation is controlled by meristem identity genes, one of which, FLORICAULA (FLO)/LEAFY (LFY), plays a central role. It is not known if the formation of reproductive organs of pre-angiosperm species is similarly regulated. Here, we report the cloning of a conifer (Pinus caribaea var. caribaea) FLO/LFY homolog, named PcLFY. This gene h
Genetics and Molecular Biology. Publicado em: 2005
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15. Identificação e caracterização de proteinas e genes expressos diferencialmente durante o desenvolvimento do embrião zigotico de Araucaria angustifolia
Arauearia angustifolia, the only native conifer in Brazil, covered the States of Paraná (40%), Santa Catarina (31 %) and Rio Grande do Sul (25%). Sparse patches were also found in areas with elevated altitudes, in the States of São Paulo (3%), Minas Gerais and Rio de Janeiro (1 %). The A. angustifolia wood was, for a long time, one of the most important ex
Publicado em: 2002
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16. Avaliação de diferentes fontes de nitrogênio em explantes de Cryptomeria japonica D.Don. "elegans" cultivados in vitro: análises bioquímicas e relações entre reguladores vegetais. / Evaluation of the different nitrate and ammonium concentrations in explants of cryptomeria japonica d. don. "elegans" cultivated in vitro .
Cryptomeria japonica D. Don. "elegans" is a fast-growing tree belonging to the Taxodiaceae and it is considered a responsive species in vitro . The aim of this work was to evaluate the effect of ten different concentrations of nitrate and ammonium in morphogenesis in vitro of Cryptomeria japonica D. Don. "elegans" explants. Analysis of relative growth rate,
Publicado em: 2002
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17. Perspectivas de Estimativa dos Balancos Anuais Hidrico e de Carbono em Ecossistemas Florestais a partir de um modelo Biogeoquimico Florestal associado a Tecnicas de Sensoriamento Remoto Orbital / On the computation of carbon and water cycles in forest ecosystems using a biogeochemical model and remotely sensed data
Este trabalho tem por objetivo testar e avaliar o potencial de utilizacao de um modelo biogeoquimico regional para representar os principais processos do ciclo hidrologico e do carbono de ecossistemas florestais de coniferas, existentes em tres estados brasileiros, submetidos a condicoes ambientais contrastes. Este modelo, denominado Forecos, tem como princi
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 199207
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18. On the computation of carbon and water cycles in forest ecosystems using a biogeochemical model and remotely sensed data / Perspectivas de Estimativa dos Balancos Anuais Hidrico e de Carbono em Ecossistemas Florestais a partir de um modelo Biogeoquimico Florestal associado a Tecnicas de Sensoriamento Remoto Orbital
Este trabalho tem por objetivo testar e avaliar o potencial de utilizacao de um modelo biogeoquimico regional para representar os principais processos do ciclo hidrologico e do carbono de ecossistemas florestais de coniferas, existentes em tres estados brasileiros, submetidos a condicoes ambientais contrastes. Este modelo, denominado Forecos, tem como princi
Publicado em: 1992
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19. Perspectivas de Estimativa dos Balancos Anuais Hidrico e de Carbono em Ecossistemas Florestais a partir de um modelo Biogeoquimico Florestal associado a Tecnicas de Sensoriamento Remoto Orbital / On the computation of carbon and water cycles in forest ecosystems using a biogeochemical model and remotely sensed data
Este trabalho tem por objetivo testar e avaliar o potencial de utilizacao de um modelo biogeoquimico regional para representar os principais processos do ciclo hidrologico e do carbono de ecossistemas florestais de coniferas, existentes em tres estados brasileiros, submetidos a condicoes ambientais contrastes. Este modelo, denominado Forecos, tem como princi
Publicado em: 1992
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20. Seasonal and Perennial Changes in the Distribution of Water in the Sapwood of Conifers in a Sub-Frigid Zone1
An analysis was made of progressive changes in patterns of cavitation in the sapwood of three species of conifer (Larix kaempferi, Abies sachalinensis, and Picea jezoensis) that were growing in a sub-frigid zone. In all three conifers, all tracheids of the newly forming outermost annual ring were filled with water or cytoplasm during the period from May to A
American Society of Plant Biologists.
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21. Seed plant phylogeny inferred from all three plant genomes: Monophyly of extant gymnosperms and origin of Gnetales from conifers
Phylogenetic relationships among the five groups of extant seed plants are presently quite unclear. For example, morphological studies consistently identify the Gnetales as the extant sister group to angiosperms (the so-called “anthophyte” hypothesis), whereas a number of molecular studies recover gymnosperm monophyly, and few agree with the morphology-b
The National Academy of Sciences.
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22. New Insights into the Mechanisms of Water-Stress-Induced Cavitation in Conifers
Cavitation resistance is a key parameter to understand tree drought tolerance but little is known about the mechanisms of air entry into xylem conduits. For conifers three mechanisms have been proposed: (1) a rupture of pit margo microfibrils, (2) a displacement of the pit torus from its normal sealing position over the pit aperture, and (3) a rupture of an
American Society of Plant Biologists.
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23. APPARENT PHOTOSYNTHESIS IN SOME CONIFERS DURING WINTER1
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24. INFLUENCE OF FOLIAGE SPRAYS ON DROUGHT RESISTANCE OF CONIFERS