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| Registros recuperados: 14 | |
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| Benitez,Letícia Carvalho; Rodrigues,Isabel Corrêa da Silva; Arge,Luis Willian Pacheco; Ribeiro,Márcia Vaz; Braga,Eugenia Jacira Bolacel. |
| A salinidade, dos solos e da água de irrigação, constitui fator limitante para o cultivo do arroz, principalmente nos estágios iniciais do desenvolvimento e no período de floração. A utilização de fontes de água de má qualidade para irrigação resulta no acúmulo de sais no solo, causando toxicidade importante na cultura. Uma solução para o problema seria a introdução de variedades com tolerância à salinidade elevada. Assim, objetivou-se com este trabalho avaliar a divergência genética entre genótipos de arroz visando à seleção de genótipos tolerantes à salinidade durante a fase vegetativa. Sementes de 10 genótipos de arroz foram cultivadas in vitro, em meio MS acrescido de 0 e 136 mM de NaCl. Após 21 dias, foram avaliados seis caracteres morfológicos e os... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Variáveis canônicas; Métodos de agrupamento; Oryza sativa L; Salinidade. |
| Ano: 2011 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1806-66902011000200021 |
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| Bacarin,Marcos Antonio; Schmitz,Douglas Damé; Falqueto,Antelmo Ralph; Cassol,Daniela; Torres,Antonio Carlos; Peters,José Antonio; Braga,Eugenia Jacira Bolacel. |
| O melhoramento genético da batata é complexo e requer uma grande demanda de tempo e energia. A tecnologia do DNA recombinante, com sua capacidade potencial de isolar e transferir genes a partir de qualquer organismo, permite incorporar nas plantas novos caracteres de interesse agrícola. No entanto, as conseqüências da inserção de determinados genes em relação às características fisiológicas da planta são, muitas vezes desconhecidas. O presente trabalho teve como objetivo avaliar as características fotossintéticas de plantas de batata cultivar Baronesa modificadas geneticamente com genes de resistência a vírus. Para isso, tubérculos de batata cultivar Baronesa e seu respectivo genótipo transformado foram plantados em vasos e mantidos em casa de vegetação.... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Solanum tuberosum; Fluorescência das clorofilas; Transformação genética. |
| Ano: 2008 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0102-05362008000300018 |
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| Mota,Monalize Salete; Bianchi,Valmor João; Carvalho,Alexandre Zanardo de; Braga,Eugenia Jacira Bolacel; Peters,José Antônio. |
| Pomares comerciais de ameixeira-japonesa devem conter pelo menos duas cultivares para obter boa fertilização, devido à presença do sistema de incompatibilidade gametofítica, que inibe a autofecundação da grande maioria das cultivares. No presente trabalho, buscou-se identificar e caracterizar molecularmente os alelos-S de 11 cultivares de ameixeira-japonesa (Prunus salicina Lindl.) e verificar a compatibilidade entre os genótipos avaliados. As cultivares Santa Rosa, Santa Rita, Reubennel, Pluma 7, América, Rosa Mineira, Amarelinha, The First, Gulfblaze (Clone São Paulo), Gulfblaze (Clone Guaiba) e Harry Pickstone foram analisadas por meio de Reação em Cadeia da Polimerase (PCR) com três pares de iniciadores específicos para alelos-S. As condições da PCR... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Ameixeira-japonesa; Autoincompatibilidade gametofítica; PCR; Alelos-S. |
| Ano: 2010 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-29452010000300020 |
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| Silva,Aline Scheer da; Danielowski,Rodrigo; Braga,Eugenia Jacira Bolacel; Deuner,Sidnei; Magalhães Junior,Ariano Martins de; Peters,Jose Antonio. |
| Techniques used to induce mutations, such as ionizing radiation, are an effective tool in increasing genetic variability in breeding programs of species of economic interest. This study aimed to evaluate the effect of different doses of Co60 gamma radiation on previously soaked seeds on the emergence and early growth of seedlings of two rice cultivars. To do this, seeds (25% moisture) of BRS Querência and BRS Fronteira were irradiated with zero (control), 50, 100, 150 and 200 Gy, and then sown in trays containing soil and kept in a greenhouse. The results showed that gamma radiation affected seedling development, where the highest dose tested (200 Gy) significantly reduced the emergence and the index of emergence speed. Growth parameters were reduced... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Oryza sativa L; Humidity; Genetic variability. |
| Ano: 2011 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1413-70542011000600008 |
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| Rickes,Leticia Neutzling; Klumb,Elsa Kuhn; Benitez,Letícia Carvalho; Braga,Eugenia Jacira Bolacel; Bianchi,Valmor João. |
| ABSTRACT Water deficit is responsible for a negative impact on agricultural systems. Several physiological, biochemical, and molecular processes are initiated as a response to water-deficit stress. Quantifying the differential expression of the genes involved in the response to water-deficit stress plays a key role in the development of molecular strategies for engineering water-stress tolerance in plants. Therefore, the present study aims to evaluate the expression of key genes involved in the water-deficit response process in peach trees cv. Chimarrita grafted onto two different rootstocks. The experimental design was completely randomized, with four treatments that correspond to the evaluation periods: day zero (control), the fourth, seventh, and ninth... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Prunus persica; Osmotic adjustment; Water stress; RT-qPCR; S6PDH; P5CS. |
| Ano: 2019 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0006-87052019000100060 |
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| Mota,Monalize Salete; Bandeira,Juliana de Magalhães; Braga,Eugenia Jacira Bolacel; Bianchi,Valmor João; Peters,José Antonio. |
| A shoot regeneration system for Plectranthus neochilus was studied from leaf explants. Leaves developed under in vitro conditions were cultured on Wood Plant Medium supplemented with 0.2mg dm-3 α-naphthaleneacetic acid (NAA) and different 6-benzilaminopurine (BAP) or thidiazuron (TDZ) concentrations (0, 1.5, 3.0, 4.5 and 6.0mg dm-3). An increase in percentage of responsive explants (85.3%) and in the number of shoots developed per explant (3.2) was observed when the explants were treated with 5.3 and 4.7mg dm-3 BAP, respectively. The leaf explants cultured on media supplemented with TDZ became vitreous and did not form buds. The regeneration system used is efficient for boldo bud induction and shoot development, showing high potential for advanced cellular... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Plectranthus neochilus; Organogenesis; Plant growth regulators. |
| Ano: 2010 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0103-84782010001000026 |
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| Zanandrea,Ilisandra; Bacarin,Marcos Antonio; Braga,Eugenia Jacira Bolacel; Bianchi,Valmor João; Peters,José Antonio. |
| The aim of the present study was to evaluate the growth and development of apple rootstock shoots submitted to different photon flux densities (7, 14, 21 and 60 µmol m-2 s-1) and three culture media. The best photon flux for maximizing growth, number of shoots and leaves was 14 µmol m-2 s-1, which also resulted in the highest values of chloroplastic pigments. On the other hand, the highest photon flux (60 µmol m-2 s-1) decreased significantly these parameters. Medium with reduced sucrose concentration did not affect the analyzed parameters, enabling an efficient multiplication of the cultivar with only 1% of sucrose. |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Mallus; Apple; Sucrose; Photon flux density; Culture medium. |
| Ano: 2009 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-89132009000500005 |
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| Borella,Junior; Becker,Rafael; Lima,Milene Conceição; Oliveira,Denise dos Santos Colares de; Braga,Eugenia Jacira Bolacel; Oliveira,Ana Claudia Barneche de; Amarante,Luciano do. |
| ABSTRACT: In this work, we compared nitrate-supplied plants (non-nodulated) with non-nitrate-supplied plants (nodulated) under oxygen privation of root system (hypoxia) and re-oxygenation (post-hypoxia; recovery) in order to verify whether N sources affect the antioxidant system during oxidative stress caused by hypoxia and post-hypoxia conditions. Antioxidant enzymatic activities, ascorbate redox state, and reactive oxygen species (ROS) levels were analyzed in roots and leaves of two soybean genotypes, Fundacep 53 RR and BRS Macota at reproductive stage R2, during hypoxia and post-hypoxia in an experiment carried out in a hydroponic system. The antioxidant system was strongly induced in roots of nitrate-supplied plants of both genotypes, with high... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Glycine max; Waterlogging; Oxidative stress; Antioxidative enzymes. |
| Ano: 2019 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0103-90162019000100051 |
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| Kleinowski,Alítcia Moraes; Brandão,Isabel Rodrigues; Einhardt,Andersom Milech; Ribeiro,Márcia Vaz; Peters,José Antonio; Braga,Eugenia Jacira Bolacel. |
| The aim of the present study was to investigate the influence of tyrosine on the in vitro growth and the production of the betacyanin pigment in Alternanthera philoxeroides and A. tenella. Nodal segments were inoculated in MS medium containing different concentrations of tyrosine (0, 25, 50 and 75 μM), and the number of sprouts and buds, height, root length, fresh matter of shoots and roots and betacyanin content were evaluated. In A. philoxeroides , the highest production of betacyanin (51.30 mg 100 g-1 FM) was in the stems with the addition of approximately 45 μM tyrosine, while the increase in the leaves was proportional to the tyrosine concentration, and the best average was obtained with a tyrosine concentration of 75 μM (15.32 mg 100 g-1 FM). Higher... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Betacyanin; Elicitors; In vitro propagation; Alligator weed; Joy weed. |
| Ano: 2014 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-89132014000200014 |
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| Perotti,Janieli Cristina; Rodrigues,Isabel Corrêa da Silva; Kleinowski,Alítcia Moraes; Ribeiro,Márcia Vaz; Einhardt,Andersom Millech; Peters,José Antonio; Bacarin,Marcos Antonio; Braga,Eugenia Jacira Bolacel. |
| A manipulação da concentração dos microelementos no meio de cultura representa uma boa estratégia para aumentar a produção de metabólitos secundários em cultura de tecidos. Este trabalho teve por objetivo demonstrar a influência do sulfato de cobre na produção de betacianina e na multiplicação de plantas de Alternanthera philoxeroides (erva-de-jacaré) cultivadas in vitro. Segmentos nodais, obtidos de plantas pré-estabelecidas e após três subcultivos, foram inoculados em meio MS, com diferentes concentrações de CuSO4 (0; 25; 75; 125; 175; 200µM). O delineamento experimental utilizado foi inteiramente casualizado, com seis concentrações de CuSO4 e cinco repetições representadas por um frasco contendo quatro explantes. Os resultados foram submetidos à análise... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Estresse abiótico; Betalaínas; Cultivo in vitro; Alternanthera philoxeroides; Metabolismo secundário. |
| Ano: 2010 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0103-84782010000900004 |
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| Pinho,Daiane Schmidt de; Rey,Maristela dos Santos; Vieira,Aniheb; Danielowski,Rodrigo; Braga,Eugenia Jacira Bolacel; Peters,Jose Antonio. |
| O objetivo do presente trabalho foi otimizar um protocolo de regeneração de explantes cotiledonares de melão, cultivar 'Gaúcho', avaliando a composição de meios de germinação e o tempo de permanência dos explantes nesses meios. Para isso, as sementes foram germinadas em meio MS semi-sólido contendo BAP ou ANA e sem esses reguladores de crescimento. As sementes permaneceram nesses meios por um, dois, três e quatro dias, sendo então seus cotilédones inoculados em meio MS contendo diferentes concentrações de BAP (0,5; 0,9; 1,5 e 2,0mg L-1). As maiores taxas de regeneração ocorreram nos cotilédones oriundos de sementes mantidas durante um e dois dias nos meios contendo 0,5 e 0,9mg L-1 de BAP. O aumento da permanência dos explantes nos meios de germinação e as... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Cucumis melo L.; Meio de cultura; Morfogênese. |
| Ano: 2010 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0103-84782010000500013 |
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| Bandeira,Juliana de Magalhães; Thurow,Liane Bahr; Braga,Eugenia Jacira Bolacel; Peters,José Antonio; Bianchi,Valmor João. |
| Rooting and acclimatization are limiting steps in plant micropropagation, especially in woody plant species. This study aimed to evaluate the IAA and IBA effect on the in vitro rooting and acclimatization of micropropagated shoots of Japanese plum (Prunus salicina Lindl.) cv. América. Shoots from 3 to 4 cm long were inoculated in MS medium with half salt and vitamin concentrations (MS/2) added with IAA and IBA (0, 0.25, 0.5, 0.75 and 1 mg L-1). After a 20-day period in in vitro cultivation, the shoots were evaluated, and then transferred to a greenhouse, and evaluated after 30 days. At the end of the in vitro cultivation period, no significant interactions were observed for number of roots per shoot and rooting percentage, but a significant effect was... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Prunus salicina; Micropropagation; Auxins. |
| Ano: 2012 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-29452012000200035 |
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| Rodrigues-Brandão,Isabel; Kleinowski,Alítcia Moraes; Einhardt,Andersom Millech; Lima,Milene Conceição; Amarante,Luciano do; Peters,José Antonio; Braga,Eugenia Jacira Bolacel. |
| This research investigates effects of salicylic acid (an abiotic elicitor) on the antioxidant activity and betacyan production from leaves of Alternanthera tenella cultured in vitro was evaluated. Plants were grown in a liquid MS medium and vermiculite substrate. After 35 days salicylic acid was added to the medium. Content of betacyanins, total phenols and flavonoids and non-enzymatic antioxidant capacity were determined in leaves of A. tenella after 0, 12, 36 and 48h of treatment. After 36h, concentration of betacyanins and total phenols increased. On the other hand, the increase of the treatment time caused a slight decrease in total flavonoids and reduced the DPPH free radical activity. As result the antioxidant activity of the leaves of A. tenella is... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Alternanthera tenella; DPPH; Total flavonoids; Phenolic compounds; Betacyanins.. |
| Ano: 2014 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0103-84782014001001893 |
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| Registros recuperados: 14 | |
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