Sabiia Seb
PortuguêsEspañolEnglish
Embrapa
        Busca avançada

Botão Atualizar


Botão Atualizar

Ordenar por: RelevânciaAutorTítuloAnoImprime registros no formato resumido
Registros recuperados: 20
Primeira ... 1 ... Última
Imagem não selecionada

Imprime registro no formato completo
Amylose content and micromorphology of popcorn progenies with different popping expansion volumes Ciência Rural
Freire,Ana Izabella; Castro,Elisa de Melo; Pereira,Ariana Mota; Cruz,Renata Ranielly Pedroza; Souza,Filipe Bittencourt Machado de; Chagas,Wantuir Filipe Teixeira; Souza,João Cândido de.
ABSTRACT: Popcorn (Zea mays var. everta) has a higher commercial value than common maize, in addition to being a popular food among consumers. Today, there is a constant search for cultivars with superior performance for several traits of interest in the case of popcorn, yield and popping expansion. On this basis, this project proposes to characterize progenies of popcorn with different values ​​of expansion capacity regarding chemical composition and micromorphology. Kernels from the fifth cycle (C5) of intrapopulation recurrent selection were evaluated. The progenies were selected based on the popping expansion volume of their kernels. The kernels were quantified for amylose and analyzed for starch granule arrangement and pericarp thickness by scanning...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Zea mays var. everta; Endosperm; Pericarp; Starch granule; Thickness..
Ano: 2020 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0103-84782020000200401
Imagem não selecionada

Imprime registro no formato completo
Anatomy, histochemistry and ultrastructure of seed and somatic embryo of Acrocomia aculeata (Arecaceae) Scientia Agricola
Moura,Elisa Ferreira; Ventrella,Marília Contin; Motoike,Sérgio Yoshimitsu.
Macaw palm (Acrocomia aculeata (Jacq.) Lodd. ex Mart.) is a tropical species with multiple uses, including oil supply for biodiesel production. However, structural and physiological studies of the seed are still scarce, as well as in vitro propagation techniques. The aim of this study was to characterize the anatomy, histochemistry and ultrastructure of the seed and the in vitro somatic embryo of A. aculeata, gaining insight into relationships between the post-harvest seed behavior and the somatic embryo conversion to plant. The zygotic embryo and the endosperm show high quantities of protein and lipids, stored in protein and lipid bodies, respectively. The cell wall storage polysaccharides occur in the thickened cell wall of the endosperm. The absence of...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Macaw palm; Zygotic embryo; Endosperm; Storage reserves.
Ano: 2010 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0103-90162010000400004
Imagem não selecionada

Imprime registro no formato completo
Cell wall hydrolases in the seeds of Euphorbia heterophylla L. during germination and early seedling development Braz. J. Plant Physiol.
Suda,Cecilia N. K.; Buckeridge,Marcos S.; Giorgini,Jarbas F..
Activities of cell wall hydrolases of Euphorbia heterophylla L. (wild poinsettia) endosperm were investigated during pre- and post-emergence periods, defined as the time interval before and after 2.2 days from the start of imbibition, respectively. The activities of endo-beta-mannanase and beta-mannosidase are higher over the pre-emergence when compared to the post-emergence period and they may be involved in the process of germination in E. heterophylla. On the other hand, the activities of beta-galactosidase, beta-glucosidase, alpha-xylosidase, beta-xylosidase and glucanases, which hydrolyse CMC, xyloglucans from Hymenaea courbaril or Copaifera langsdorffii, xylan, Avicel and lichenan, are higher over the post-emergence period. Activity on laminarin...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Cotyledon expansion; Endosperm; Endoglucanase; Endomannanase; Euphorbiaceae; Xylanase.
Ano: 2003 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1677-04202003000300002
Imagem não selecionada

Imprime registro no formato completo
Compositional changes of proteins and amino acids in germinating coffee seeds BABT
Shimizu,Milton Massao; Mazzafera,Paulo.
Endosperm is the main reserve tissue in coffee seeds. Coffee (Coffea arabica L.) seeds were germinated for six weeks and qualitative and quantitative changes in amino acids and proteins were investigated. The total content of free amino acids were reduced during germination, however, protein content remained constant. SDS-PAGE profiles showed that legumin-like proteins became less stained in the last weeks. Asparagine, glutamic acid, aspartic acid, alanine and lysine were the major free amino acids, although serine and glutamine were also significant. Except for tyrosine, which increased with germination, all other amino acids were reduced. Analysis of the amino acid composition of the total soluble protein showed glutamic acid/glutamine and glycine as the...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Amino acids; Coffea arabica; Endosperm; Germination; Protein; Seeds.
Ano: 2000 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-89132000000300003
Imagem não selecionada

Imprime registro no formato completo
Cytology, biochemistry and molecular changes during coffee fruit development Braz. J. Plant Physiol.
De Castro,Renato D.; Marraccini,Pierre.
In commercial coffee species (Coffea arabica and Coffea canephora), fruit development is a lengthy process, characterized by tissue changes and evolutions. For example, soon after fecundation and up to mid development, the fruit is mainly constituted of the pericarp and perisperm tissue. Thereafter, the perisperm gradually disappears and is progressively replaced by the endosperm (true seed). Initially present in a "liquid" state, the endosperm hardens as it ripens during the maturation phase, as a result of accumulation of storage proteins, sucrose and complex polysaccharides representing the main reserves of the seed. The last step of maturation is characterized by the dehydration of the endosperm and the color change of the pericarp. Important...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Coffea spp; Bean development; Cell cycle; Endosperm; EST; Gene expression; Pericarp; Perisperm.
Ano: 2006 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1677-04202006000100013
Imagem não selecionada

Imprime registro no formato completo
Estudios anatómicos fisiológicos y nutrimentales de semillas de heliconias Colegio de Postgraduados
Benítez Domínguez, Lizeth.
Las heliconias son especies que desempeñan importantes funciones en los ecosistemas y que tienen un valor comercial alto debido a sus vistosas inflorescencias. Estas especies normalmente se reproducen de manera asexual y su producción se reduce a manejos tradicionales, por lo que existen pocos estudios de sus semillas y del manejo nutrimental de las plantas para elevar su producción. En esta investigación de hicieron estudios anatómicos, fisiológico y nutrimentales de cinco especies de heliconias: Heliconia bourgaeana, H. collinsiana, H. latispatha, H. psittacorum y H. rostrata. Las semillas de estas especies resultaron impermeables al agua. En H. collinsiana y H. latispatha los embriones se encontraron bien desarrollados y sin daños después de un año de...
Palavras-chave: Heliconiaceae; Embrión; Endospermo; Ácido abscísico; Nutrimentos; Heliconiaceae; Embryo; Endosperm; Abscisic acid; Nutrients; Maestría; Edafología.
Ano: 2010 URL: http://hdl.handle.net/10521/80
Imagem não selecionada

Imprime registro no formato completo
Estudios anatómicos fisiológicos y nutrimentales de semillas de heliconias Colegio de Postgraduados
Benítez Domínguez, Lizeth.
Las heliconias son especies que desempeñan importantes funciones en los ecosistemas y que tienen un valor comercial alto debido a sus vistosas inflorescencias. Estas especies normalmente se reproducen de manera asexual y su producción se reduce a manejos tradicionales, por lo que existen pocos estudios de sus semillas y del manejo nutrimental de las plantas para elevar su producción. En esta investigación de hicieron estudios anatómicos, fisiológico y nutrimentales de cinco especies de heliconias: Heliconia bourgaeana, H. collinsiana, H. latispatha, H. psittacorum y H. rostrata. Las semillas de estas especies resultaron impermeables al agua. En H. collinsiana y H. latispatha los embriones se encontraron bien desarrollados y sin daños después de un año de...
Palavras-chave: Heliconiaceae; Embrión; Endospermo; Ácido abscísico; Nutrimentos; Heliconiaceae; Embryo; Endosperm; Abscisic acid; Nutrients; Maestría; Edafología.
Ano: 2010 URL: http://hdl.handle.net/10521/80
Imagem não selecionada

Imprime registro no formato completo
Influence of air temperature on proteinase activity and beverage quality in Coffea arabica Rev. Bras. Bot.
Abreu,Hellen Marília Couto de; Nobile,Paula Macedo; Shimizu,Milton Massao; Yamamoto,Paula Yuri; Silva,Emerson Alves; Colombo,Carlos Augusto; Mazzafera,Paulo.
Fruits were collected from trees of Coffea arabica cv. Obatã grown at Mococa and Adamantina in São Paulo State, Brazil, which are regions with marked differences in air temperature that produce coffee with distinct qualities. Mococa is a cooler location that produces high-quality coffee, whereas coffee from Adamantina is of lower quality. The amino acid and protein contents, amino acid profile, and proteinase activity and type in endosperm protein extracts were analysed. Proteinase genes were identified, and their expression was assayed. All results indicate that temperature plays a role in controlling proteinase activity in coffee endosperm. Proteinase activity was higher in the endosperm of immature fruits from Adamantina, which was correlated with...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Amino acids; Coffee quality; Cysteine proteinase; Endosperm; Protein.
Ano: 2012 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-84042012000400009
Imagem não selecionada

Imprime registro no formato completo
Matriconditioning integrated with gibberellic acid to hasten seed germination and improve stand establishment of pepper and tomato PAB
Andreoli,Claudinei; Khan,Anwar A.
Emergence and stand establishment of tomato (Lycopersicon lycopersicum (L.) (Karsten ex Farw) and pepper (Capsicum annus L.) seeds are often slow and erratic, particularly under stress conditions. Field emergence trials sometimes have not responded to priming in pepper. This study examined the combined effects of matriconditioning and gibberellin application on the germination and stand establishment of pepper and tomato seeds. Pepper and tomato seeds were conditioned with a solid carrier, Micro Cel E, in the presence of gibberellic acid (GA) for 1, 2 , 3 and 4 days at 15 and 25ºC. The results showed that, in all cases, even under stress conditions, the combination of matriconditioning with GA was effective in improving germination and emergence of pepper...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Priming; Growth regulator; Endosperm.
Ano: 1999 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-204X1999001000023
Imagem não selecionada

Imprime registro no formato completo
Ruminal degradability of hard or soft texture corn grain at three maturity stages Scientia Agricola
Pereira,Marcos Neves; Von Pinho,Renzo Garcia; Bruno,Ralph Guilherme da Silva; Calestine,Gabriela Arruda.
The predominance of vitreous endosperm in hard texture flint corn (Zea mays L.) can decrease ruminal starch digestion comparatively to the farinaceous endosperm of dent corn, reducing energy content of the grain. The objective of this experiment was to evaluate the effects of texture and maturity stage on ruminal degradability of corn grain. Two dent and two flint hybrids were harvested at the early dent, half milk line, and black layer stages. The proportion of vitreous endosperm (vitreousness) in dent hybrids was 44.3%, while in flint it was 67.0%. There was a linear increase in vitreousness with advancing maturity. Flint hybrids at the early dent stage were more vitreous than dent at the black layer stage. The increase in vitreousness per maturation day...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Vitreousness; Endosperm; Dent corn; Flint corn; Rumen.
Ano: 2004 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0103-90162004000400002
Imagem não selecionada

Imprime registro no formato completo
Seed characters and their usefulness in the separation of Asteraceae species Biological Sciences
Batista, Michelli Fernandes; Santos, Luciane da Silva; Muller, Rafael Hespanhol; Souza, Luiz Antonio de.
Studies on seed structure of Asteraceae have received little attention of botanists. Seed structure in Asteraceae is analyzed to evaluate the usefulness of characters in the separation of species through the analysis of nine weedy species. Seeds originate from anatropous, unitegmic and tenuinucellate ovules. The partial collapse of the developing seed coat is a common characteristic in the Asteraceae species studied. The testa consists of crushed and thin-walled cells in almost all of the species studied herein, except for Elephantopus mollis and Parthenium hysterophorus, which showed exotesta cells with U-shaped thickening. The analysis revealed high uniformity in seed characters. 
Tipo: Info:eu-repo/semantics/article Palavras-chave: 2.03.02.03-7 ovule; Exotesta; Endosperm; Embryo Botânica.
Ano: 2015 URL: http://periodicos.uem.br/ojs/index.php/ActaSciBiolSci/article/view/27964
Imagem não selecionada

Imprime registro no formato completo
Seed storage proteins in coffee Rev. Bras. Fisiol. Veg.
BAÚ,SANDRA M. T.; MAZZAFERA,PAULO; SANTORO,LUIZ G..
It has been reported that Coffea arabica seeds contain as the main reserve protein, a legumin-like protein, constituted of two subunits, alpha and beta, of approximately 35 and 20 kDa. In this work the seed proteins of several coffee species and varieties were investigated by SDS-PAGE and gel filtration. No differences were observed in the electrophoretic profiles among varieties of C. arabica, however, marked differences were observed among species, or even among individuals of some species. In general, the molecular weight of the subunits alpha and beta accounted for a monomer of 48 to 62 kDa. However, native molecular weight obtained by gel filtration showed that for most of the species there is association of 6 of such proteins, in a hexamer. The most...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Coffea; Legumin; Endosperm.
Ano: 2001 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0103-31312001000100004
Imagem não selecionada

Imprime registro no formato completo
Simultaneous dehydration and infiltration with (2-hydroxyethyl)-methacrylate (HEMA) for lipid preservation in plant tissues Acta Botanica
Oliveira,João Marcelo Santos de.
Although this study aims to develop an improved method for the preservation of reserve lipids in plant tissues for different uses in plant anatomy, it mostly aims to develop an improved method for the identification of lipid reserves where synthesis or storage occurs. The proposed procedures entail only the utilization of (2-hydroxyethyl)-methacrylate (HEMA) as a dehydration agent. One of the procedures is based on the gradual exchange of aqueous HEMA solutions with increasing concentrations. In another procedure, dehydration and infiltration are induced by the presence of silica gel around a modified microcentrifuge tube containing the aqueous HEMA solution with the plant tissues, thus allowing efficient lipid preservation. Both procedures resulted in...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Embryo; Endosperm; HEMA; Lipids; Plant anatomy; Plant microtechnique.
Ano: 2015 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0102-33062015000200207
Imagem não selecionada

Imprime registro no formato completo
Some thoughts on the physiology of caffeine in coffee: and a glimpse of metabolite profiling Braz. J. Plant Physiol.
Baumann,Thomas W..
Human beings enjoy the flavor and stimulating activity of a cup of coffee without knowing that by doing so, they are part of a 'food web' and receive signals coffee plants build to improve their struggle for life. This review is centered in the first part on the purine alkaloid caffeine and its physiological role in the coffee plant's life cycle. Many of the thoughts and ideas presented here are plain speculation, because the real research revealing the secrets of plant physiology such as e.g. the formation of the coffee bean with all its ingredients, has just started. The recent achievements in molecular biology made it possible to tackle and answer new questions regarding the regulation of secondary metabolism in the coffee plant organs at selected...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Endosperm; Flower; Germination; Metabolite profiling; Purine alkaloid; Perisperm.
Ano: 2006 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1677-04202006000100017
Imagem não selecionada

Imprime registro no formato completo
Storage sites in seeds of Caesalpinia echinata and C. ferrea (Leguminosae) with considerations on nutrients flow BABT
Teixeira,Simone de Pádua; Machado,Sílvia Rodrigues.
The seeds of Caesalpinia echinata and C. ferrea behaved as typical endospermic seeds, despite their different morphological classification (exendospermic seeds were described for C. echinata and endospermic seeds for C. ferrea). Then, the aim of this work was to compare, under ultrastructural and histochemical terms, the nature of the storage substances and their accumulation sites, as well as the nutrient flow in seeds of these species. Cotyledons in C. echinata accumulate carbohydrates, lipids and proteins, which are mobilized from the outer to the inner parts as revealed by the position of plasmodesmata. Endosperm in C. ferrea accumulates carbohydrates and in C. echinata accumulates substances during the initial embryogenic phases. Such tissue develops...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Cotyledon; Embryo; Endosperm; Histochemistry; Reserve substances; Ultrastructure.
Ano: 2008 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-89132008000100016
Imagem não selecionada

Imprime registro no formato completo
Temperature-dependent germination and endo-beta -mannanase activity in sesame seeds Rev. Bras. Fisiol. Veg.
CARVALHO,PATRÍCIA GONÇALVES BAPTISTA DE; BORGHETTI,FABIAN; BUCKERIDGE,MARCOS SILVEIRA; MORHY,LAURO; FERREIRA FILHO,EDIVALDO XIMENES.
The effects of temperature on germination and endo-beta-mannanase activity in seeds of Sesamum indicum was investigated. The minimum germination temperature (Tmin) lies between 12.8°C and 13.2°C while the maximum temperature (Tmax) is located between 45.5°C and 46°C. Germinabilities are statistically not different from estimated viability (88%) between 18.8°C and 43.2°C. The Mann-Whitney test indicated the interval 31.9°C to 35.1°C as the optimum temperature (Topt) range for germination rate. When seeds incubated at temperatures at or below the Tmin and close to or above the Tmax were transferred to 30°C, those incubated at lower temperatures achieved high germinability. On the other hand, the higher the pre-incubation temperature above Tmax, the lower the...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Endosperm; Germination rate; Sesame.
Ano: 2001 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0103-31312001000200003
Imagem não selecionada

Imprime registro no formato completo
The effect of temperature on the performance and stability of some grain quality component of rice (Oryza sativa L.) International Rice Research Institute
Cruz, Normita M. de la.
90 l. : ill. Thesis (M.S.) -- Gregorio Araneta University Foundation
Tipo: Thesis Palavras-chave: Rice; Temperature; Amylose; Gelatinization; Endosperm; Rice quality.
Ano: 1987 URL: http://hdl.handle.net/123456789/1333
Imagem não selecionada

Imprime registro no formato completo
The importance of Arabidopsis seed mutants in the elucidation of the molecular basis of Endosperm Balance Number in tuberbearing Solanum species Biocell
Cornejo,P.; Camadro,E.L.; Masuelli,R.W..
The Endosperm Balance Number (EBN) is an important concept for potato breeding and has evolutionary importance in tuber-bearing Solanum species. The EBN is part of the post-zygotic hybridization barriers in the group and represents a reproductive isolating mechanism. Few genes have been proposed to be involved in its genetic control; until now, however, neither specific genes nor its molecular basis have been well established. Histological observations of embryo and endosperm development in inter-EBN crosses in tuber-bearing Solanum revealed phenotypes similar to those recently described in Arabidopsis seed mutants. The common feature between them is that the endosperm nuclei become greatly enlarged and that embryos are arrested at the globular stage. The...
Tipo: Info:eu-repo/semantics/article Palavras-chave: EBN; Solanum; Endosperm; Arabidopsis; Seed mutants.
Ano: 2006 URL: http://www.scielo.org.ar/scielo.php?script=sci_arttext&pid=S0327-95452006000300001
Imagem não selecionada

Imprime registro no formato completo
Variability of ricin content in mature seeds of castor bean PAB
Baldoni,Aisy Botega; Carvalho,Mayara Holanda de; Sousa,Natália Lima; Nóbrega,Márcia Barreto de Medeiros; Milani,Máira; Aragão,Francisco José Lima.
The objective of this work was to evaluate ricin concentration in castor bean seeds (Ricinus communis) of 20 accessions from the Banco de Germoplasma de Mamoneira of the Embrapa Algodão, Campina Grande, PB, Brazil, using the Enzyme Linked Immunosorbent Assay. Significant differences were observed among accessions. BRA 3271 had the highest ricin concentration in seeds (32.18 ng µg-1), and BRS Paraguaçu had the lowest (3.53 ng µg-1). There is the possibility of selecting genotypes with different ricin concentrations, which can be used according on the interest of the breeding programs.
Tipo: Info:eu-repo/semantics/article Palavras-chave: Ricinus communis; Endosperm; Germplasm bank; Seed protein.
Ano: 2011 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-204X2011000700015
Imagem não selecionada

Imprime registro no formato completo
ธาตุสังกะสีในเมล็ดข้าวพันธุ์พื้นเมืองภาคใต้ Thai Agricultural
Nantiya Panomjan; Chanakan Promuthai; Sansanee Jamjod; Benjavan Rerkasem.
Variation in zinc (Zn) concentration in the grain of 50 local rice varieties from Southern Thailand was examined by diphenyl thiocarbazone (DTZ) staining (intense, medium, low, and nil) and chemical analysis. Intense staining was found in the aleurone layer of 94% of the varieties, in the embryo 56% of the varieties and endosperm 12% of the varieties. Variation was found in the DTZ staining intensity of the embryo and endosperm of individual grains, with Shannon-weaver diversity index (H) of the DTZ staining at 0.15-1.00 for the embryo and 0.00-1.00 for the endosperm. Chemical analysis found the Zn concentration in brown rice grain ranging between 18-34 mg Zn/kg, 7 varieties were considered high grain Zn (29-34 mg Zn/kg). The Zn concentration in the husk...
Tipo: PhysicalObject Palavras-chave: Staining; Local rice; Endosperm; Grain; Zinc; ข้าวพื้นเมือง; อาหารสะสมในเมล็ด; เมล็ดข้าว; สังกะสี; ภาคใต้.
Ano: 2012 URL: http://anchan.lib.ku.ac.th/agnet/handle/001/5403
Registros recuperados: 20
Primeira ... 1 ... Última
 

Empresa Brasileira de Pesquisa Agropecuária - Embrapa
Todos os direitos reservados, conforme Lei n° 9.610
Política de Privacidade
Área restrita

Embrapa
Parque Estação Biológica - PqEB s/n°
Brasília, DF - Brasil - CEP 70770-901
Fone: (61) 3448-4433 - Fax: (61) 3448-4890 / 3448-4891 SAC: https://www.embrapa.br/fale-conosco

Valid HTML 4.01 Transitional