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| Registros recuperados: 19 | |
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| 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 |
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| 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 |
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| 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 |
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| 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 |
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| 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 |
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| 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... |
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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 |
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| 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... |
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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 |
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| 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 |
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| 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 |
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| 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 |
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| 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 |
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| 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 |
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| 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 |
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| 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 |
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| Registros recuperados: 19 | |
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