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Registros recuperados: 221 | |
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Teixeira,Felipe Karam; Menezes-Benavente,Larissa; Galvão,Vinícius Costa; Margis-Pinheiro,Márcia. |
Antioxidant metabolism protects cells from oxidative damage caused by reactive oxygen species (ROS). In plants, several enzymes act jointly to maintain redox homeostasis. Moreover, isoform diversity contributes to the fine tuning necessary for plant responses to both exogenous and endogenous signals influencing antioxidant metabolism. This study aimed to provide a comprehensive view of the major classes of antioxidant enzymes in the woody species Eucalyptus grandis. A careful survey of the FORESTs data bank revealed 36 clusters as encoding antioxidant enzymes: six clusters encoding ascorbate peroxidase (APx) isozymes, three catalase (CAT) proteins, three dehydroascorbate reductase (DHAR), two glutathione reductase (GR) isozymes, four monodehydroascorbate... |
Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Eucalyptus; Antioxidant metabolism; Catalase; Ascorbate-gluthatione cycle. |
Ano: 2005 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1415-47572005000400007 |
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Bocca,Silvia Nora; Magioli,Claudia; Mangeon,Amanda; Junqueira,Ricardo Magrani; Cardeal,Vanessa; Margis,Rogério; Sachetto-Martins,Gilberto. |
The occurrence of quasi-repetitive glycine-rich peptides has been reported in different organisms. Glycine-rich regions are proposed to be involved in protein-protein interactions in some mammalian protein families. In plants, a set of glycine-rich proteins (GRPs) was characterized several years ago, and since then a wealth of new GRPs have been identified. GRPs may have very diverse sub-cellular localization and functions. The only common feature among all different GRPs is the presence of glycine-rich repeat domains. The expression of genes encoding GRPs is developmentally regulated, and also induced, in several plant genera, by physical, chemical and biological factors. In addition to the highly modulated expression, several GRPs also show... |
Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Glycine-rich; GRP; Eucalyptus. |
Ano: 2005 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1415-47572005000400016 |
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Harakava,Ricardo. |
Eucalyptus ESTs libraries were screened for genes involved in lignin biosynthesis. This search was performed under the perspective of recent revisions on the monolignols biosynthetic pathway. Eucalyptus orthologues of all genes of the phenylpropanoid pathway leading to lignin biosynthesis reported in other plant species were identified. A library made with mRNAs extracted from wood was enriched for genes involved in lignin biosynthesis and allowed to infer the isoforms of each gene family that play a major role in wood lignin formation. Analysis of the wood library suggests that, besides the enzymes of the phenylpropanoids pathway, chitinases, laccases, and dirigent proteins are also important for lignification. Colocalization of several enzymes on the... |
Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Eucalyptus; Lignin; Expressed sequenced tag; Phenylpropanoids pathway; Monolignols. |
Ano: 2005 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1415-47572005000400015 |
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Domingues,Douglas Silva; Leite,Susi Meire Maximino; Farro,Ana Paula Cazerta; Coscrato,Virgínia Elias; Mori,Edson Seizo; Furtado,Edson Luiz; Wilcken,Carlos Frederico; Velini,Edivaldo Domingues; Guerrini,Iraë Amaral; Maia,Ivan Godoy; Marino,Celso Luis. |
Boron (B) is a low mobility plant micronutrient whose molecular mechanisms of absorption and translocation are still controversial. Many factors are involved in tolerance to Boron excess or deficiency. Recently, the first protein linked to boron transport in biological systems, BOR1, was characterized in Arabidopsis thaliana. This protein is involved in boron xylem loading and is similar to bicarbonate transporters found in animals. There are indications that BOR1 is a member of a conserved protein family in plants. In this work, FORESTS database was used to identify sequences similar to this protein family, looking for a probable BOR1 homolog in eucalypt. We found five consensus sequences similar to BOR1; three of them were then used in multiple alignment... |
Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Eucalyptus; Boron; Xylem loading; Expressed Sequence Tag (EST); BOR1. |
Ano: 2005 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1415-47572005000400017 |
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Rocha,Graça Celeste Gomes; Corrêa,Régis Lopes; Borges,Anna Cristina Neves; Sá,Claudio Bustamante Pereira de; Alves-Ferreira,Márcio. |
Homeobox genes encode transcriptional factors, usually involved in molecular control of plant developmental patterns. They can be divided into several classes according to conserved sequences within the homeobox region and the presence of specific additional sequences. Based on these conserved sequences, we developed a search procedure to identify possible homeobox genes in the Eucalyptus Genome Sequencing Project Consortium (FORESTs) database. We were able to identify 50 Eucalyptus sequences (EST-contigs) containing the homeodomain sequence. Phylogenetic analysis was applied to this ESTs-contigs and 44 of them were found to have similarities with one of three well-known homeobox classes: Bell, Knox and HD-Zip, and their sub-classes. However, no EST-contig... |
Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Plant development; Abiotic stress; Eucalyptus; FORESTs; Phylogenetic analysis. |
Ano: 2005 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1415-47572005000400005 |
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Rabello,Edenilson; Souza,Adriane Nunes de; Saito,Daniel; Tsai,Siu Mui. |
This study assessed the abundance of microsatellites, or simple sequence repeats (SSR), in 19 Eucalyptus EST libraries from FORESTs, containing cDNA sequences from five species: E. grandis, E. globulus, E. saligna, E. urophylla and E. camaldulensis. Overall, a total of 11,534 SSRs and 8,447 SSR-containing sequences (25.5% of total ESTs) were identified, with an average of 1 SSR/2.5 kb when considering all motifs and 1 SSR/3.1 kb when mononucleotides were not included. Dimeric repeats were the most abundant (41.03%), followed by trimerics (36.11%) and monomerics (19.59%). The most frequent motifs were A/T (87.24%) for monomerics, AG/CT (94.44%) for dimerics, CCG/CGG (37.87%) for trimerics, AAGG/CCTT (18.75%) for tetramerics, AGAGG/CCTCT (14.04%) for... |
Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Eucalyptus; EST; Microsatellite; Simple sequence repeat (SSR); Molecular marker. |
Ano: 2005 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1415-47572005000400013 |
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SANTOS, P. E. T. dos; PALUDZYSZYN FILHO, E.; MAGALHAES, W. L. E.; PIMENTEL, N.. |
A Embrapa Florestas vem desenvolvendo trabalhos com eucaliptos praticamente desde o ano de 1978, sendo os primórdios das suas ações de pesquisa marcados pela presença de espécies subtropicais, dentre elas Eucalyptus dunnii, E. benthamii e E. viminalis, além de outras menos familiares ao ambiente de produção florestal. Em grande parte, isso se deve à localização geográfica da Unidade, mais precisamente no município de Colombo e, portanto, dentro da região metropolitana de Curitiba, a qual, por sua vez, é abrangida pela Zona Bioclimática 1, a mais drástica em termos de rigor da estação de inverno, porém, caracteristicamente com boa distribuição de chuvas ao longo do ano e sem ocorrência de déficit hídrico. A área de melhoramento genético da Unidade... |
Tipo: Documentos (INFOTECA-E) |
Palavras-chave: Propagação; Manejo florestal; Eucalipto; Silvicultura; Madeira; Celulose; Pesquisa Florestal; Melhoramento Genético Vegetal; Eucalyptus viminalis; Eucalyptus. |
Ano: 2020 |
URL: http://www.infoteca.cnptia.embrapa.br/infoteca/handle/doc/1125379 |
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QUEIROZ, D. L. de; KÜNAST, T. B. S.; CREMONESE, J. T.; CORT, G. D.; SA, L. A. N. de; BARBOSA, L. R.; SCHUHLI, G. S. e; BURCKHARDT, D.. |
Psilídeos compreendem pequenos insetos da superfamília Psylloidea, distribuídos por todos os continentes. São sugadores fitófagos, muitos deles presentes em diversas culturas agrícolas, florestais e ornamentais, podendo causar prejuízos econômicos. Mais de 300 espécies de psilídeos, todas elas de origem australiana, são citadas utilizando o eucalipto como planta hospedeira (Hollis, 2004). No Brasil, além de Blastopsylla occidentalis Taylor, 1985, foram também introduzidas mais três outras espécies, todas da família Aphalaridae (Hemiptera, Psylloidea) subfamília Spondyliaspidinae, sendo elas: Ctenarytaina eucalypti (Maskell, 1890), Ctenarytaina spatulata Taylor, 1997 e Glycaspis brimblecombei Moore, 1964 (Burckhardt; Queiroz, 2012). |
Tipo: Comunicado Técnico (INFOTECA-E) |
Palavras-chave: Casa de vegetação.; Psilídeo; Blastopsylla occidentalis; Eucalipto; Eucalyptus; Psylloidea.. |
Ano: 2020 |
URL: http://www.infoteca.cnptia.embrapa.br/infoteca/handle/doc/1121621 |
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FERRARI, M. P.; GROSSI, F.; WENDLING, I.. |
O assunto propagação vegetativa de espécies florestais atualmente é de amplo conhecimento e utilização principalmente pelas grandes empresas florestais.No entanto, a Embrapa Florestas percebe uma demanda muito forte por parte de pequenos produtores rurais, pequenos viveiristas, cooperativas,organizações não governamentais - ONGS, e instituições de pesquisa e desenvolvimento, no sentido de conhecer melhor os diferentes processos de propagação disponíveis, suas vantagens e desvantagens e a aplicabilidade de cada método na sua atividade.Neste sentido, os autores elaboraram o presente documento que tem o objetivo, de numa linguagem simples, expor algumas vantagens e desvantagens de diferentes técnicas de propagação vegetativa, seus usos e possibilidades, e... |
Tipo: Documentos (INFOTECA-E) |
Palavras-chave: Espécie florestal; Técnica; Propagação; Propagação Vegetativa; Eucalyptus. |
Ano: 2004 |
URL: http://www.infoteca.cnptia.embrapa.br/infoteca/handle/doc/304164 |
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Registros recuperados: 221 | |
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