Populus Alba
Mostrando 1-12 de 22 artigos, teses e dissertações.
-
1. Ecologia de roosting e análise morfométrica de Pteropus medius (raposa-voadora indiana) no distrito de Lower Dir, Paquistão
Resumo O presente estudo foi conduzido com o intuito de explorar variações morfométricas de Pteropus medius (raposa-voadora indiana) e árvores de repouso em Lower Dir, Paquistão. Os morcegos foram capturados de Morus alba, Morus nigra, Broussonetia papyrifera, Pinus roxburghii, Hevea brasiliensis, Platanus orientalis, Populus nigra, Melia azedarach, Euc
Braz. J. Biol.. Publicado em: 2021-02
-
2. Antimicrobial and antibiofilm activities of phenolic compounds extracted from Populus nigra and Populus alba buds (Algeria)
The interest of this work is the discovery of new antimicrobial agents of plant origin to inhibit the formation of microbial biofilms. The present research was conducted to identify and quantify the phenolic compounds extracted from Populus nigra and Populus alba buds harvested in the area of Tizi-Ouzou (Algeria), and to evaluate their antimicrobial and anti
Braz. J. Pharm. Sci.. Publicado em: 24/10/2019
-
3. Effects of Heat Treatment on the Relative Amounts of Cellulose in Nanosilver-Impregnated and Untreated Poplar Wood (Populus alba)
ABSTRACT The present study investigated the effect of heat treatment on the relative amount of cellulose in untreated and nanosilver-impregnated poplar wood (Populus alba). The impacts on physical and mechanical properties were further studied. Specimens were heated at 145°C and 165°C in hot air medium. In order to enhance heat transfer to the inner parts
Floresta Ambient.. Publicado em: 29/07/2019
-
4. Estudo da atividade de promotores heterólogos em plantas transgênicas de Populus tremula x P. alba.
2000
ENCONTRO DO TALENTO ESTUDANTIL DA EMBRAPA RECURSOS GENÉTICOS E BIOTECNOLOGIA. Publicado em: 2011
-
5. Própolis produzida no sul do Brasil, Argentina e Uruguai: evidências fitoquímicas de sua origem vegetal
A própolis é uma substância resinosa coletada pelas abelhas de diversas partes da planta. Sua composição depende da época, vegetação e área de coleta. Própolis produzida por abelhas Apis mellifera africanizada do sul do Brasil, Argentina e Uruguai foram investigadas por meio de técnicas cromatográficas. De acordo com os resultados obtidos por CCD
Ciência Rural. Publicado em: 2002-12
-
6. Estudo fitoquimico da origem botanica da propolis e avaliação da composição quimica de mel de Apis mellifera africanizada de diferentes regiões do Brasil
o objetivo deste estudo foi classificar e analisar a origem botânica dos principais tipos de própolis brasileiras produzidas por abelhas Apis mellifera africanizadas, bem como avaliar a composição de amostras de mel e própolis da mesma colméia coletados em várias regiões do Brasil. Assim, foram coletadas 201 amostras de própolis nas regiões Norte,
Publicado em: 2002
-
7. Cell-Specific and Conditional Expression of Caffeoyl-Coenzyme A-3-O-Methyltransferase in Poplar1
Caffeoyl coenzyme A-3-O-methyltransferase (CCoAOMT) plays an important role in lignin biosynthesis and is encoded by two genes in poplar (Populus trichocarpa). Here, we describe the expression pattern conferred by the two CCoAOMT promoters when fused to the gus-coding sequence in transgenic poplar (Populus tremula × Populus alba). Both genes were expressed
American Society of Plant Physiologists.
-
8. Lignification in Transgenic Poplars with Extremely Reduced Caffeic Acid O-Methyltransferase Activity1
Transgenic poplars (Populus tremula × Populus alba) were obtained by introduction of a sense homologous transgene encoding caffeic acid O-methyltransferase (COMT) under the control either of the cauliflower mosaic virus double 35S promoter or of the eucalyptus cinnamyl alcohol dehydrogenase promoter. Although these constructs conferred a moderate overexpres
American Society of Plant Physiologists.
-
9. Activation Tagging of a Dominant Gibberellin Catabolism Gene (GA 2-oxidase) from Poplar That Regulates Tree Stature1
We identified a dwarf transgenic hybrid poplar (Populus tremula × Populus alba) after screening of 627 independent activation-tagged transgenic lines in tissue culture, greenhouse, and field environments. The cause of the phenotype was a hyperactivated gene encoding GA 2-oxidase (GA2ox), the major gibberellin (GA) catabolic enzyme in plants. The mutati
The American Society for Plant Biologists.
-
10. Red Xylem and Higher Lignin Extractability by Down-Regulating a Cinnamyl Alcohol Dehydrogenase in Poplar.
Cinnamyl alcohol dehydrogenase (CAD) catalyzes the last step in the biosynthesis of the lignin precursors, the monolignols. We have down-regulated CAD in transgenic poplar (Populus tremula X Populus alba) by both antisense and co-suppression strategies. Several antisense and sense CAD transgenic poplars had an approximately 70% reduced CAD activity that was
-
11. Overexpression of glutathione reductase but not glutathione synthetase leads to increases in antioxidant capacity and resistance to photoinhibition in poplar trees.
A poplar hybrid, Populus tremula x Populus alba, was transformed with the bacterial genes for either glutathione reductase (GR) (gor) or glutathione synthetase (GS) (gshII). When the gor gene was targeted to the chloroplasts, leaf GR activities were up to 1000 times greater than in all other lines. In contrast, targeting to the cytosol resulted in 2 to 10 ti
-
12. Manipulation of Glutathione and Amino Acid Biosynthesis in the Chloroplast1
Poplars (Populus tremula × Populus alba) were transformed to overexpress Escherichia coli γ-glutamylcysteine synthetase (γ-ECS) or glutathione synthetase in the chloroplast. Five independent lines of each transformant strongly expressed the introduced gene and possessed markedly enhanced activity of the gene product. Glutathione (GSH) contents were
American Society of Plant Physiologists.