Consulta: subjectFacets:"Lignin"
Registros recuperados: 34
Data/hora: 04/06/2024 02:14:26

Actividad de enzimas fibrolíticas y fermentación in vitro con paja de cebada y raicilla inoculadas con Pleurotus sapidus.
Provedor de dados: Depósito Institucional Abierto de Documentos Digitales del Colegio de Postgraduados (COLPOS DIGITAL )
Autores: Soto Sánchez, Alfonso.
El objetivo del presente trabajo fue conocer la acción enzimática del hongo basidiomiceto Pleurotus sapidus al actuar sobre los subproductos agroindustriales: Paja de cebada (PC), Raicilla (RC) y la Mezcla PC y RC 75:25 (M), además los cambios en su composición química que permitieran mejorar la digestibilidad de los subproductos usados en la alimentación de rumiantes. Se realizaron dos experimentos, el primero fue evaluar la actividad enzimática de lacasas, celulasas y xilanasas, a los 0, 8, 16 y 24 días de cultivo; las muestras obtenidas para cada tiempo se prensaron para obtener un extracto líquido (complejo enzimático) y posteriormente en el prensado residual se determinó la composición bromatológica de PC, RC y M en relación al valor inicial. Los...
Palavras-chave: Fermentación en sustrato sólido; Digestibilidad; AGV; FDN; FDA; Lignina; Fermentation in solid substrate; Digestibility; VFA; NDF; ADF; Lignin; Ganadería; Doctorado.
Ano: 2009
URL: http://hdl.handle.net/10521/2396

Generation and analysis of an Eucalyptus globulus cDNA library constructed from seedlings subjected to low temperature conditions
Provedor de dados: Electronic Journal of Biotechnology
Autores: Rasmussen-Poblete,Susana; Valdes,Jorge; Gamboa,Maria Cecilia; Valenzuela,Pablo D.T; Krauskopf,Erwin.
Eucalyptus globulus is the most important commercial temperate hardwood in the world because of its wood properties and due to its characteristics for biofuel production. However, only a very low number of expressed sequence tags (ESTs) are publicly available for this tree species. We constructed a cDNA from E. globulus seedlings subjected to low temperature and sequenced 9,913 randomly selected clones, generating 8,737 curated ESTs. The assembly produced 1,062 contigs and 3,879 singletons forming a Eucalyptus unigene set. Based on BLASTX analysis, 89.3% of the contigs and 88.5% of the singletons had significant similarity to known genes in the non-redundant database of GenBank. The Eucalyptus unigene set generated is a valuable public resource that...
Tipo: Journal article
Palavras-chave: Cellulose; Cold-temperature; EST database; Forest biotechnology; Lignin.
Ano: 2008
URL: http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0717-34582008000200008

Genes encoding enzymes of the lignin biosynthesis pathway in Eucalyptus
Provedor de dados: Genetics and Molecular Biology
Autores: 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

Lignina frente a fungos apodrecedores de madeira.
Provedor de dados: Informação Tecnológica em Agricultura (Infoteca-e)
Autores: LOURENÇON, T. V.; MAGALHAES, W. L. E.
A lignina é um dos principais cons- tituintes da madeira e também está presente em diversos vegetais, em quantidades que variam bastante. Na madeira estão presentes também com- ponentes majoritários como celulose e hemicelulose, somados a componentes não estruturais conhecidos como extra- tivos e compostos inorgânicos. A lignina é o material aromático renovável mais abundante na Terra e o segundo polímero orgânico mais abundante depois da celulose (Hatakka, 2001). Além disso, é conhecida por sua estrutura amorfa tridimensional, consti- tuída por unidades fenilpropano metoxi- ladas (Chakar; Ragauskas, 2004). Segundo Gellerstedt e Henriksson (2008), a lignina apresenta uma estrutura altamente irregular em comparação com a da celulose. Também é conhecida por...
Tipo: Comunicado Técnico (INFOTECA-E)
Palavras-chave: Polímero; Bioativo; Lignina; Celulose; Madeira; Eucalipto; Fungo; Lignin.
Ano: 2020
URL: http://www.infoteca.cnptia.embrapa.br/infoteca/handle/doc/1125508

Composição química de plantas de cobertura sob manejo na floração e maturação: efeitos na dinâmica de decomposição de resíduos vegetais.
Provedor de dados: Informação Tecnológica em Agricultura (Infoteca-e)
Autores: CARVALHO, A. M. de; SOUZA, L. L. P. de; CASTRO ALVES, P. C. A.; GUIMARAES JUNIOR, R.
bitstream/item/79704/1/bolpd-258.pdf
Tipo: Boletim de Pesquisa e Desenvolvimento (INFOTECA-E)
Palavras-chave: Green manure; Savanna.; Cerrado; Plantio Direto.; Planta de Cobertura; Cellulose; Hemicellulose; Lignin; No-tillage; Organic matter.
Ano: 2009
URL: http://www.infoteca.cnptia.embrapa.br/infoteca/handle/doc/953747

Teores de hemiceluloses, celulose e lignina em plantas de cobertura com potencial para sistema plantio direto no Cerrado.
Provedor de dados: Informação Tecnológica em Agricultura (Infoteca-e)
Autores: CARVALHO, A. M. de; DANTAS, R. DE. A.; COELHO, M. C.; LIMA, W. M.; SOUZA, J. P. S. P. DE; FONSECA, O. P.; GUIMARAES JUNIOR, R.
bitstream/item/75878/1/bolpd-290.pdf
Tipo: Boletim de Pesquisa e Desenvolvimento (INFOTECA-E)
Palavras-chave: Green manure; Savanna.; Adubo Verde; Celulose; Cerrado; Hemicelulose; Lignina; Plantio Direto.; Hemicellulose; Cellulose; Chemical composition; Lignin; No-tillage; Organic matter.
Ano: 2010
URL: http://www.infoteca.cnptia.embrapa.br/infoteca/handle/doc/883969

Metodologia de caracterização físico-química de lignina kraft.
Provedor de dados: Informação Tecnológica em Agricultura (Infoteca-e)
Autores: VAZ JUNIOR, S.; MAGALHAES, W. L. E.; COLNAGO, L. A.; LEAL, W. G. de O.
A presente Metodologia descreve a aplicação otimizada das técnicas analíticas ATG, BET, 13C-RMN, DSC, FTIR, MEV-EDS, Py-GC-MS e SEC -ELSD na caracterização físico-química de uma amostra de lignina kraft, obtida de híbrido nacional de E. grandis x E. urophylla. Por meio de tais técnicas, foi possível observar as várias propriedades físico-químicas da lignina, de modo a poder avaliar a utilização da mesma como suporte de liberação lenta ou controlada de moléculas bioativas de interesse agrícola. The present Methodology describes the optimized application of the analytical techniques TGA, BET, 13C-NMR, DSC, FTIR, SEM -EDS, Py-GC-MS and SEC-ELSD in the physicochemical characterization of a kraft lignin sample obtained from E. grandis x E. urophylla hybrid...
Tipo: Boletim de Pesquisa e Desenvolvimento (INFOTECA-E)
Palavras-chave: Lignina kraft; Liberação controlada; Liberação lenta; Análise termogravimétrica; Análise de área superficial; Calorimetria exploratória diferencial; Cromatografia em fase líquida de exclusão; Cromatografia em fase gasosa; Espectroscopia de absorção no infravermelho; Microscopia eletrônica de varredura; Ressonância magnética nuclear; Lignina; Composição Química; Propriedade Físico-Química; Eucalyptus Grandis; Eucalyptus Urophylla; Lignin; Processing chemistry; Physical chemistry.
Ano: 2020
URL: http://www.infoteca.cnptia.embrapa.br/infoteca/handle/doc/1123698

Mapa de rotas tecnológicas da conversão da lignina em intermediários químicos, combustíveis e materiais.
Provedor de dados: Informação Tecnológica em Agricultura (Infoteca-e)
Autores: SCHULTZ, E. L.; BELÉM, D. L.; BRAGA, M.
O trabalho foi desenvolvido a partir das atividades de inteligência estratégica sobre a Plataforma Industrial de Lignina do Observatório de Tendências em Biocombustíveis e Bioprodutos (OTBB). Estas atividades foram executadas a partir do levantamento de informações contidas em artigos científicos e documentos de patentes, por métodos quantitativos e qualitativos, e seguida pela análise e consolidação dessas informações em um mapa de rotas tecnológicas, com perspectivas de curto, médio e longo prazos sobre o uso da lignina para produção de intermediários químicos, combustíveis e materiais.
Tipo: Livros
Palavras-chave: Rotas tecnológicas; Lignina; Matéria Prima; Desenvolvimento Sustentável; Biomassa.; Lignin; Biomass.
Ano: 2022
URL: http://www.infoteca.cnptia.embrapa.br/infoteca/handle/doc/1146185

Lignina de tegumento de semente de manga como componente ativo em filme de amido de milho.
Provedor de dados: Informação Tecnológica em Agricultura (Infoteca-e)
Autores: SOUSA, V. S. de; ARAÚJO JUNIOR, C. P. de; SOUZA FILHO, M. de S. M. de; FEITOSA, J. P. de A.; AZEREDO, H. M. C. de.
O objetivo deste Comunicado Técnico é explorar os benefícios da adição de lignina de tegumento de semente de manga sobre as propriedades de filmes de amido de milho 1 e sua possível aplicabilidade. Já são bem conhecidos os problemas ambientais associados ao descarte maciço e contínuo de materiais plásticos de uso único, a exemplo das embalagens de alimentos, além dos esforços de pesquisa realizados no sentido de substituir, pelo menos parcialmente, os polímeros derivados de petróleo, geralmente usados como matrizes de tais materiais. Na Embrapa Agroindústria Tropical, diversos estudos têm sido desenvolvidos objetivando o desenvolvimento de filmes à base de compostos extraídos de subprodutos de manga, em um contexto de biorrefinaria.
Tipo: Comunicado Técnico (INFOTECA-E)
Palavras-chave: Tommy Atkins; Manga; Lignina; Lignin; Mangifera.
Ano: 2021
URL: http://www.infoteca.cnptia.embrapa.br/infoteca/handle/doc/1137121

Phenolic compounds: production of phenolic compounds from lignin.
Provedor de dados: Informação Tecnológica em Agricultura (Infoteca-e)
Autores: RODRIGUES, C. M.
TC202
Tipo: Folders
Palavras-chave: Lignin; Depolymerization.
Ano: 2022
URL: http://www.infoteca.cnptia.embrapa.br/infoteca/handle/doc/1139327

Importância do conteúdo de lignina da parede celular da vagem e do tegumento da semente de soja sobre o seu desempenho fisiológico e sanitário.
Provedor de dados: Informação Tecnológica em Agricultura (Infoteca-e)
Autores: KRZYZANOWSKI, F. C.; FRANÇA-NETO, J. B.; HENNING, F. A.
Tipo: Folhetos
Palavras-chave: Lignina; Semente; Soja; Tegumento; Lignin; Seeds; Soybeans.
Ano: 2022
URL: http://www.infoteca.cnptia.embrapa.br/infoteca/handle/doc/1145526

Metodologia de caracterização físico-química de lignina kraft.
Provedor de dados: Informação Tecnológica em Agricultura (Infoteca-e)
Autores: VAZ JUNIOR, S.; MAGALHAES, W. L. E.; COLNAGO, L. A.; LEAL, W. G. de O.
A presente Metodologia descreve a aplicação otimizada das técnicas analíticas ATG, BET, 13C-RMN, DSC, FTIR, MEV-EDS, Py-GC-MS e SEC -ELSD na caracterização físico-química de uma amostra de lignina kraft, obtida de híbrido nacional de E. grandis x E. urophylla. Por meio de tais técnicas, foi possível observar as várias propriedades físico-químicas da lignina, de modo a poder avaliar a utilização da mesma como suporte de liberação lenta ou controlada de moléculas bioativas de interesse agrícola. The present Methodology describes the optimized application of the analytical techniques TGA, BET, 13C-NMR, DSC, FTIR, SEM -EDS, Py-GC-MS and SEC-ELSD in the physicochemical characterization of a kraft lignin sample obtained from E. grandis x E. urophylla hybrid...
Tipo: Boletim de Pesquisa e Desenvolvimento (INFOTECA-E)
Palavras-chave: Lignina kraft; Liberação controlada; Liberação lenta; Análise termogravimétrica; Análise de área superficial; Calorimetria exploratória diferencial; Cromatografia em fase líquida de exclusão; Cromatografia em fase gasosa; Espectroscopia de absorção no infravermelho; Microscopia eletrônica de varredura; Ressonância magnética nuclear; Lignina; Composição Química; Propriedade Físico-Química; Eucalyptus Grandis; Eucalyptus Urophylla; Lignin; Processing chemistry; Physical chemistry.
Ano: 2020
URL: http://www.infoteca.cnptia.embrapa.br/infoteca/handle/doc/1124600

Kraft lignin: Kraft lignin-based controlled release formulation for pest control.
Provedor de dados: Informação Tecnológica em Agricultura (Infoteca-e)
Autores: VAZ JUNIOR, S.
A formulation that uses lignin obtained by precipitation of black liquor from the kraft pulping process of the pulp and paper industry as an inert material for adsorption and desorption of the semiochemical cis-Jasmone for use in integrated pest management (IPM), through controlled release.
Tipo: Folders
Palavras-chave: Kraft lignin; Lignina; Lignin; Kraft pulping.
Ano: 2021
URL: http://www.infoteca.cnptia.embrapa.br/infoteca/handle/doc/1133123

Caracterização ecológica e fitoquímica de quatro populações naturais de Maytenus ilicifolia no Estado do Paraná
Provedor de dados: PFB - Pesquisa Florestal Brasileira
Autores: Radomski, Maria Izabel; Bull, Leonardo Theodoro.
A espécie medicinal Maytenus ilicifolia (Mart. ex Reiss.) localiza-se naturalmente sob diferentes condições edafoclimáticas. Isto implica em prováveis mecanismos de adaptação das populações naturais, cujas características químicas podem estar fixadas geneticamente. Este estudo foi desenvolvido para determinar a influência do ambiente sobre a composição fitoquímica de M. ilicifolia. Amostras de plantas foram coletadas em quatro populações naturais localizadas sobre diferentes superfícies geológicas no Estado do Paraná e sob distintas condições de luminosidade (pleno sol, meia sombra e sombra). Os solos foram classificados segundo o Sistema Brasileiro de Classificação. Foram avaliados os teores foliares de N, P, K, Ca, Mg, Fe, Mn, Cu, Zn, Si, Al, lignina,...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Espinheira-santa  lignina  tanino  silício. Espinheira-santa; Lignin; Tannin; Silicon.
Ano: 2010
URL: http://pfb.cnpf.embrapa.br/pfb/index.php/pfb/article/view/93

Elephant grass genotypes for bioenergy production by direct biomass combustion
Provedor de dados: Pesquisa Agropecuária Brasileira
Autores: Morais,Rafael Fiusa de; Souza,Bruno Juscelino de; Leite,José Marcos; Soares,Luis Henrique de Barros; Alves,Bruno José Rodrigues; Boddey,Robert Michael; Urquiaga,Segundo.
The objective of this work was to evaluate elephant grass (Pennisetum purpureum Schum.) genotypes for bioenergy production by direct biomass combustion. Five elephant grass genotypes grown in two different soil types, both of low fertility, were evaluated. The experiment was carried out at Embrapa Agrobiologia field station in Seropédica, RJ, Brazil. The design was in randomized complete blocks, with split plots and four replicates. The genotypes studied were Cameroon, Bag 02, Gramafante, Roxo and CNPGL F06-3. Evaluations were made for biomass production, total biomass nitrogen, biomass nitrogen from biological fixation, carbon/nitrogen and stem/leaf ratios, and contents of fiber, lignin, cellulose and ash. The dry matter yields ranged from 45 to 67 Mg...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Pennisetum purpureum; Ash; Agroenergy; Biological nitrogen fixation; Genotype; Lignin.
Ano: 2009
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-204X2009000200004

Effect of different substrates on composting of poultry litter
Provedor de dados: Revista Brasileira de Zootecnia
Autores: Orrico,Ana Carolina Amorim; Centurion,Stanley Ribeiro; Farias,Romildo Marques de; Orrico Junior,Marco Antonio Previdelli; Garcia,Rodrigo Garófallo.
The objective was to evaluate the differences between distinct types of litter material and their combinations in the dynamics of degradation on the organic matter fractions and the quality of the final compound. The treatments were established according to material used as substrate for broiler litter: treatment 1 - rice husks; 2 - sugar cane bagasse; 3 - wood shavings; 4 - wood shavings + sugar cane bagasse; 5 - rice husks + sugar cane bagasse; and 6 - Napier grass. The following variables were monitored: temperature, levels of total solids (TS), volatile solids (VS), mass and volume of the pile, fibrous fraction, and levels and reductions of N, P and K during the process. Piles formed with Napier grass and sugar cane bagasse presented the highest...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Broiler production; Cellulose; Lignin; Temperature; Total solids.
Ano: 2012
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-35982012000700028

Evaluation of sodium sulfite and protein correction in analyses of fibrous compounds in tropical forages
Provedor de dados: Revista Brasileira de Zootecnia
Autores: Gomes,Daiany Íris; Detmann,Edenio; Valadares Filho,Sebastião de Campos; Mezzomo,Rafael; Souza,Natália Krish de Paiva; Queiroz,Augusto César de; Detmann,Kelly da Silva Coutinho.
The objective of this study was to evaluate the contents of fibrous compounds in tropical grasses and legumes according to utilization of sodium sulfite in the neutral detergent solution or using a procedure for contaminant protein correction. Samples of ten grasses and ten legumes were used. The contents of neutral detergent fiber were decreased when sodium sulfite was used; however, more prominent reductions were verified in legumes. Sodium sulfite decreased the acid detergent fiber content in both forage groups. The contents of neutral and acid detergent insoluble protein and lignin were reduced by sodium sulfite in legumes, but no effect was observed in grasses with regard to these variables. The decrease in fiber contents in legumes could be explained...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Acid detergent fiber; Acid detergent insoluble protein; Lignin; Neutral detergent fiber; Neutral detergent insoluble protein.
Ano: 2012
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-35982012000100032

PELLETIZATION OF Anthracophyllum discolor FOR WATER AND SOIL TREATMENT CONTAMINATED WITH ORGANIC POLLUTANTS
Provedor de dados: Revista de la Ciencia del Suelo y Nutrición Vegetal
Autores: Rubilar,O; Elgueta,S; Tortella,G; Gianfreda,L; Diez,MC.
Pellets of the white-rot fungus Anthracophyllum discolor with activated carbon and sawdust (complex pellets) were formulated for the degradation of lignin in water and the bioremediation of soil contaminated with pentachlorophenol (PCP). The complex pellets were formed by a center of activated carbon and sawdust surrounded by fungal mycelium, whereas simple pellets consisting of only mycelium were hollow spheres. Degradation of lignin was performed in an airlift reactor at initial lignin concentration of 1000 mg L-1 and the fungal pellets were re-used two times in batch operations. Complex pellets degraded lignin by 87 and 72% in the first and second cycle, respectively, and they were significantly more effective than simple pellets. In addition, complex...
Tipo: Journal article
Palavras-chave: White-rot fungi; Lignin; Airlift reactor; Pentachlorophenol; Soils.
Ano: 2009
URL: http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0718-27912009000300001

Elevated atmospheric CO2 increases Eucalyptus urophylla S. T. Blake stem diameter by stimulating cell proliferation and reducing lignin deposition
Provedor de dados: Acta Botanica Brasilica
Autores: Innocente,Patricia Sitta; Teixeira,Simone Pádua; Balbuena,Tiago Santana.
ABSTRACT In 2019, the atmospheric CO2 concentration exceeded the 415 ppm milestone for the first time in the human history. According to projections of the Intergovernmental Panel on Climate Change (IPCC), CO2 levels will continue to rise in the future, potentially affecting all living organisms. Plants with C3 metabolism may benefit from rising CO2 levels because the significant losses of photosynthesis, driven by photorespiration could be diminished under this scenario. This study addressed the anatomical changes in the stems of young Eucalyptus urophylla plants induced through cultivation in elevated CO2 (eCO2). Plants cultivated under eCO2 showed increased stem diameter (i.e., radial width of the secondary xylem, secondary phloem and cortex tissues)....
Tipo: Info:eu-repo/semantics/other
Palavras-chave: Carbon dioxide; Climate change; Eucalyptus; Lignin; Plant stress; Stem anatomy.
Ano: 2020
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0102-33062020000300589

Growth and root lignification of susceptible and glyphosate-resistant soybean - doi: 10.4025/actasciagron.v33i2.6305
Provedor de dados: Acta Scientiarum: Agronomy
Autores: Zonetti, Patricia da Costa; Cesumar; Suzuki, Letícia Sayuri; UEM; Bonini, Edicléia Aparecida; UEM; Ferrarese, Maria de Lourdes Lucio; UEM; Ferrarese Filho, Osvaldo; UEM.
Glyphosate resistance is conferred to soybean (Glycine max L. Merril) by incorporating a gene encoding a glyphosate-insensitive enzyme (CP4-EPSP synthase) that acts in the shikimate/chorismate pathway, an important metabolic route in the lignification process. The aim of this work was to investigate the root growth and lignin contents of susceptible (CD 201 and OC 14) and glyphosate-resistant (CD 214RR and CD 213RR) soybean cultivars. To this end, three-day-old seedlings were cultivated in half-strength Hoagland nutrient solution (pH 6.0) in a growth chamber (25°C, 12-h photoperiod, irradiance of 280 &amp;micro;mol m-2 s-1) for 24 to 96 hours. The results revealed that glyphosate-resistant (CD 213RR and CD 214RR) cultivars showed high root growth when...
Palavras-chave: 5.00.00.00-4 glyphosate-resistant soybean; Lignin; Root growth; Soybean Ciências Agrárias glyphosate-resistant soybean; Lignin; Root growth; Soybean.
Ano: 2011
URL: http://periodicos.uem.br/ojs/index.php/ActaSciAgron/article/view/6305

Primary leaf growth and coleoptile length in maize seedlings
Provedor de dados: Acta Scientiarum: Agronomy
Autores: Lopes, Camila Aparecida; Carvalho, Maria Laene Moreira de; Vasconcelos, Michelle Conceição; Ribeiro, Ana Maria Pereira; Santos, Heloísa Oliveira dos.
Evaluation of the physiological potential of maize seeds during the certification process is performed by a germination test. However, some tests show a delay in the growth of aerial seedling organs that does not reflect seed lot behavior in the field. This study aims to investigate the effects of genotype, water, light and temperature on differential primary leaf growth compared to coleoptile length in maize seedlings. Seeds from two simple hybrids and their reciprocal crosses that showed slow primary leaf growth were evaluated according to physiological quality, morphology, histochemistry, and enzymatic expression. There were differences among maize genotypes regarding initial primary leaf growth when compared to the coleoptile, especially when...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Ciências agrárias; Agronomia; Fitotecnia ea mays L.; Germination test; Lignin; Enzymes. Qualidade de sementes.
Ano: 2018
URL: http://periodicos.uem.br/ojs/index.php/ActaSciAgron/article/view/35366

Primary leaf growth and coleoptile length in maize seedlings
Provedor de dados: Acta Scientiarum: Agronomy
Autores: Lopes, Camila Aparecida; Carvalho, Maria Laene Moreira de; Vasconcelos, Michelle Conceição; Ribeiro, Ana Maria Pereira; Santos, Heloísa Oliveira dos.
Evaluation of the physiological potential of maize seeds during the certification process is performed by a germination test. However, some tests show a delay in the growth of aerial seedling organs that does not reflect seed lot behavior in the field. This study aims to investigate the effects of genotype, water, light and temperature on differential primary leaf growth compared to coleoptile length in maize seedlings. Seeds from two simple hybrids and their reciprocal crosses that showed slow primary leaf growth were evaluated according to physiological quality, morphology, histochemistry, and enzymatic expression. There were differences among maize genotypes regarding initial primary leaf growth when compared to the coleoptile, especially when...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Ea mays L.; Germination test; Lignin; Enzymes.; Qualidade de sementes.
Ano: 2018
URL: http://periodicos.uem.br/ojs/index.php/ActaSciAgron/article/view/35366

Chemical changes in sunflower silage associated with different additives - doi: 10.4025/actascianimsci.v35i1.14049
Provedor de dados: Acta Scientiarum: Animal Sciences
Autores: Goes, Rafael Henrique de Tonissi e Buschinelli de; Universidade Federal da Grande Dourados; Miyagi, Eliane Sayuri; Universidade Federal da Grande Dourados; Oliveira, Euclides Reuter de; Universidade Federal da Grande Dourados; Brabes, Kelly Cristina da Silva; Universidade Federal da Grande Dourados; Patussi, Rosielen Augusto; Universidade Federal da Grande Dourados; Dambrós, Carlos Eduardo; Universidade Federal da Grande Dourados.
Thirty-six experimental silos arranged in a completely randomized 4 x 3 factorial design were provided to evaluate the chemical changes of sunflower silage treated with soybean hulls, sunflower crushed and urea at 14, 21 and 28 days of ensilage. The additives were based on 5% natural matter, whereas control consisted of silage with 100% sunflower plant. OM, NDIP, and MM had average rates 911.2; 86.6 and 92.9 g kg-1 of dry matter respectively. The addition of soybean hulls and sunflower crushed increased DM rates after 28 and 21 days. Urea increased nitrogen fractions and the addition of soybean hulls increased total carbohydrate content of silage by 5.1%, whereas the addition of sunflower crushed decreased the same by 2.18%. NDF, ADF and hemicellulose...
Tipo: Pesquisa
Palavras-chave: 5.04.03.03-6 sunflower crushed; Lignin; NDF; PH; Soybean hulls; Urea.
Ano: 2013
URL: http://periodicos.uem.br/ojs/index.php/ActaSciAnimSci/article/view/14049

Anatomia e cinética de degradação do feno de Manihot glaziovii - doi: 10.4025/actascianimsci.v32i2.8800
Provedor de dados: Acta Scientiarum: Animal Sciences
Autores: França, Andrezza Araújo; UFPB; Guim, Adriana; UFRPE; Batista, Ângela Maria Vieira; UFRPE; Pimentel, Rejane Magalhães de Mendonça; UFRPE; Ferreira, Geane Dias Gonçalves; UFRPE; Martins, Isis Darlene Sabóia Leal; UFRPE.
Avaliaram-se a composição química, o teor de compostos secundários, a degradabilidade in situ, a anatomia e a degradabilidade dos tecidos do feno de maniçoba, a partir de plantas em início de frutificação, oriundas de uma vegetação de caatinga em Ibimirim, Estado do Pernambuco. O caule apresentou células com variados graus de lignificação, destacando-se a presença de fibras gelatinosas, parênquima medular lignificado e espessas paredes celulares no xilema. As folhas se destacam pela presença da estrutura girder, caracterizam-se pela grande quantidade de mesofilo, constituído por células com paredes delgadas, contribuindo para a degradabilidade de matéria seca. Idioblastos contendo drusas de oxalato foram encontrados nos tecidos vasculares, na nervura...
Tipo: Análise laboratorial; discrição de caracteres
Palavras-chave: Ciências Agrárias; Zootecnia; Pastagem e Forragicultura parede celular; Lignina; Microscopia vegetal; Digestibilidade; Forrageira nativa Pastagem e Forragicultura cell wall; Lignin; Plant microscopy; Digestibility; Native forage.
Ano: 2010
URL: http://periodicos.uem.br/ojs/index.php/ActaSciAnimSci/article/view/8800

Phenolic acids and ruminal parameters of different varieties of sugarcane in natura or ensiled
Provedor de dados: Acta Scientiarum: Animal Sciences
Autores: Spínola, Jaime Emerson Laranjeira; Tavares dos Reis, Sidnei; Junqueira de Sales, Eleuza Clarete; Monção, Flávio Pinto; Rigueira, João Paulo Sampaio; Delvaux Júnior, Nelson de Abreu.
This study aimed to determine and measure the phenolic acids in four varieties of sugarcane (RB 855536, RB 765418, SP 80-1842 and SP 80-1816) as fresh and ensiled, and assess the influence of these acids on in situ degradability of dry matter and neutral detergent fiber. The experimental design was completely randomized in a factorial design. For the fraction of dry matter (DM), varieties RB 855536 and SP 80-1842 had average 17.80% higher compared to others. The SP80-1842 and RB 855536 varieties did not differ (p &gt; 0.05), with an average of DM effective degradability of 33.70%. For silage, the highest levels of p-coumaric acid were found in the variety RB 855536, which was 24.64% higher than the varieties RB 765418 and SP 80-1842 (average 12.75%) and...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: 5.04.03.00-1 digestibility; Fermentation; Lignin; Silage; Nutritional value.
Ano: 2017
URL: http://periodicos.uem.br/ojs/index.php/ActaSciAnimSci/article/view/31470

Optimization of RT-PCR reactions in studies with genes of lignin biosynthetic route in Saccharum spontaneum
Provedor de dados: Anais da Academia Brasileira de Ciências
Autores: LLERENA,JUAN P.P.; ARAÚJO,PEDRO; MAZZAFERA,PAULO.
ABSTRACT Saccharum spontaneum has been used for the development of energy cane a crop aimed to be used for the production of second-generation ethanol, or lignocellulosic ethanol. Lignin is a main challenge in the conversion of cell wall sugars into ethanol. In our studies to isolate the genes the lignin biosynthesis in S. spontaneum we have had great difficulty in RT-PCR reactions. Thus, we evaluated the effectiveness of different additives in the amplification of these genes. While COMT and CCoAOMT genes did not need any additives for other genes there was no amplification (HCT, F5H, 4CL and CCR) or the yield was very low (CAD and C4H). The application of supplementary cDNA was enough to overcome the non-specificity and low yield for C4H and C3H, while...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Biomass; Cell wall; Energy cane; Lignin; Lignocellulosic ethanol; Sugarcane.
Ano: 2018
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0001-37652018000100509

A supramolecular proposal of lignin structure and its relation with the wood properties
Provedor de dados: Anais da Academia Brasileira de Ciências
Autores: Abreu,Heber S.; Latorraca,João V.F.; Pereira,Regina P.W.; Monteiro,Maria Beatriz O.; Abreu,Fábio A.; Amparado,Kelysson F.
In spite of the great importance of cellulose the lignin is considered the second most abundant substance of the wood. However, little attention has been given it, mainly to wood properties. The lignin as well as other structural compounds (cellulose and hemicelluloses), has obviously an important role on the wood properties, probably due its composition and existent bonds. In general lignins have β-O-4 (Alkyl Aril Ether) as majoritary bond. This bond in a continued structure form big molecules with spiral conformation as virtual model. Based on this idea, lignins that have high/low β-O-4 content may have differentiated spiraled structures,suggesting different behaviors on the wood properties,which shows that the lignins (Guaicyl:Syringyl (GS)) of...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Lignin; Molecular conformation; Wood properties; Structure.
Ano: 2009
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0001-37652009000100014

Chemical characterization of the lignins of corn and soybean agricultural residues
Provedor de dados: Arquivo Brasileiro de Medicina Veterinária e Zootecnia
Autores: Saliba,E.O.S.; Rodriguez,N.M.; Piló-Veloso,D.; Morais,S.A.L.
Corn (CR) and soybean (SR) culture wastes were submitted to extraction with organic solvents for lignin isolation (LGS). The obtained lignin was chemically characterized, and based on studies of functional groups and microanalyses, it was possible to determine the minimum formula. LGS of CR has characteristics that resemble wood and of bamboo lignin, possessing a larger amount of methoxyl groups and vanillin.
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Lignin; Culture residue; Chemical characterization; Corn residue; Soybean residue.
Ano: 2002
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0102-09352002000100007

Involvement of peroxidases in structural changes of barley stem
Provedor de dados: Bragantia
Autores: Lidija,Begović; Lepeduš,Hrvoje; Lalić,Alojzije; Štolfa,Ivna; Jurković,Zorica; Kovačević,Josip; Cesar,Vera.
ABSTRACT The aim of this study was to investigate anatomical characteristics of barley (Hordeum vulgare L.) internodes and to reveal the connection with activity of guaiacol-peroxidases, their isoenzyme profiles, lignin, and cellulose content. Three lower internodes were sampled at elongation stage and differed in their anatomical features by showing that lignin deposition follows developmental pattern. Epidermis and hypodermis in the first internode were characterized by continuous layer of the lignified cells while in the second and third internode thin walled parenchyma cells could be observed in the hypodermis. These observations were in accordance with increment of peroxidase activity from the first to the third internode. Two acidic and 2 basic...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Lignin; Cell wall; Internode; Hordeum vulgare L.
Ano: 2017
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0006-87052017000300352

Naringenin inhibits the growth and stimulates the lignification of soybean root
Provedor de dados: Brazilian Archives of Biology and Technology
Autores: Bido,Graciene de Souza; Ferrarese,Maria de Lourdes Lucio; Marchiosi,Rogério; Ferrarese-Filho,Osvaldo.
The flavanone naringenin, an intermediate in flavonoid biosynthesis, was tested for its effect on root growth, phenylalanine ammonia-lyase (PAL) and peroxidase (POD) activities, as well as phenolic compounds and lignin contents in soybean (Glycine max L. Merrill) seedlings. Three-day-old seedlings were cultivated in half-strength Hoagland nutrient solution (pH 6.0), with or without 0.1 to 0.4 mM naringenin in a growth chamber (25°C, 12-h photoperiod, irradiance of 280 µmol m-2 s-1) for 24 h. Inhibitory effects on root growth (length, weight, cell viability), PAL and soluble POD activities were detected after naringenin treatments. These effects were associated with stimulatory activity of the cell wall-bound POD followed by an increase in the lignin...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Allelopathy; Lignin; Flavonoid; Peroxidase; Phenylalanine ammonia-lyase; Root growth.
Ano: 2010
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-89132010000300005

Decomposition of the Rubber Tree Hevea brasiliensis Litter at Two Depths
Provedor de dados: Chilean Journal of Agricultural Research
Autores: Gréggio,Thiago Claudino; Assis,Luiz Carlos; Nahas,Ely.
The decomposition of soil litter contributes to maintaining agricultural sustainability, since the nutrients released by microbial activity are determinants of the net productivity of the agroecosystem. The decomposition of rubber tree (Hevea brasiliensis [Willd. ex A. Juss.] Müll. Arg.) leaves located on the surface and buried in at 10 cm depth in Forest and Savannah (Cerradão) soils (Oxisols) was studied, with emphasis on the production of CO2 and the monthly variation of the remaining amounts of litter mass, soluble substances, cellulose and lignin. To evaluate CO2 production, H. brasiliensis leaves were incubated for 30 days in soils from the 0-2 cm and 10-12 cm layers. CO2 production increased in the 0-2 cm layer in comparison to the 10-12 cm layer....
Tipo: Journal article
Palavras-chave: Litter mass; Cellulose; Lignin; Soluble substances; Litter-bags.
Ano: 2008
URL: http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0718-58392008000200002

Forage potential of Urochloa genotypes by using leaf anatomy
Provedor de dados: Ciência Rural
Autores: Mauri,Janaína; Pereira,Daniele Laís; Silva,Gabrielle Avelar; Davide,Lisete Chamma; Techio,Vânia Helena; Souza Sobrinho,Fausto; Pereira,Fabricio José.
ABSTRACT:  The digestibility potential of leaves from forages depends on the amount of nutrition in their tissues, with low lignin deposition in the cell wall, mainly parenchyma and phloem. This research evaluated the leaf structure of different Urochloa genotypes and discussed its potential for evaluating digestibility. The cultivars U. brizantha, U. decumbens, U. ruziziensis and three clones of U. ruziziensis (1, 95 and 97), which are under development in breeding programs, were evaluated. Plants were grown under the recommended culture conditions for the Urochloa species. Plants were cut 60 days after sowing, and leaves were collected at 15 days of regrowth. Leaves were fixed in FAA 70 and further stored in 70% ethanol until being submitted to the usual...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Digestibility; Forage production; Leaf anatomy; Sclerenchyma; Lignin.
Ano: 2019
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0103-84782019000400401

Relationship between chemical components, bacterial adherence and in vitro fermentation of tropical forage legumes
Provedor de dados: Ciência e Agrotecnologia
Autores: Fluck,Ana Carolina; Kozloski,Gilberto Vilmar; Martins,Andressa Ana; Mezzomo,Mariana Patricia; Zanferari,Filipe; Stefanello,Simone.
Inclusion of forage legumes in diet may improve tropical ruminant systems productivity and sustainability. However, it is not well stablished which chemical components more impact their nutritional value. The relationship between chemical composition and in vitro fermentation of tropical forage legume was evaluated with the objective of obtaining indicators of their nutritional value. Samples of Crotalaria spectabilis, Cajanus cajan, Macrotyloma axillare, Mucuna aterrina, Stylosantis sp. and Canavalia ensiformis, cut from plants at growth age between 47 to 110 days, were analysed. Total gas production showed negative correlation (P&lt;0.05) with total N (R=-0.51), acid detergent fibre (ADF, R=-0.62) and acid detergent lignin (ADL, R=-0.65), and positive...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Gas production; Lignin; Nutritional value; Phenolic compounds; Tannins.
Ano: 2013
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1413-70542013000500010

Use of markers to determine the ileal digestibility of amino acids for swine
Provedor de dados: Ciência e Agrotecnologia
Autores: Pozza,Paulo Cesar; Gomes,Paulo Cezar; Pozza,Magali Soares Santos; Nunes,Ricardo Vianna; Ferreira,Rony Antônio; Rodrigueiro,Ramalho José Barbosa.
Many markers can be used in digestibility assays for swine, but needs to be evaluated before its use. An assay was carried out with the objective of measuring the coefficients of ileal apparent (CIAD) and standardized digestibility (CISD) of amino acids in meat and bone meal for swine using different markers. Eight crossbred barrows were equipped with T-cannulas in the distal ileum. Four animals received a free protein diet and another four received a diet containing meat and bone meal as the only protein source in the diet. The treatments consisted in evaluating the chromic oxide, acid-insoluble ash naturally occurring in the diet, cellulose and lignin as markers to determine the apparent and standardized digestibility of the amino acids contained in the...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Acid-insoluble ash; Cellulose; Chromic oxide; Lignin; Simple T-cannula.
Ano: 2013
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1413-70542013000300009