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| Registros recuperados: 45 | |
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| Paradizo, Inayá Castiglioni; Becacici Macieira, Bernardo Pretti; Novo Gama, Vinícius; Valandro Zanetti, Leonardo; Cuzzuol, Geraldo Rogerio Faustini. |
| A ocorrência de Cariniana legalis (Mart.) Kuntze (Lecythidaceae) em florestas secundárias em diferentes fases de regeneração sugere que essa espécie seja mais resistente a pleno sol em relação a Paratecoma peroba (Record. & Mell) Kuhlm. (Bignoniaceae) encontrada no interior da floresta primária densa. O objetivo desse trabalho foi caracterizar a plasticidade das variáveis de crescimento, anatômicas e estruturais de parede celular de C. legalis e P. peroba. Como o caule é forte dreno em arbóreas, foi elaborada a hipótese que as plasticidades das ligninas e dos monossacarídeos das hemiceluloses são maiores em relação às variáveis de crescimento e anatômicas, especialmente em C. legalis, mais resistente a pleno sol, como sugere seu hábito ecológico.... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Fisiologia Vegetal; Ecofisiologia Vegetal; Fisiologia de Florestas Crescimento; Anatomia Foliar; Cariniana legalis; Paratecoma peroba Growth; Foliar anatomy; Cariniana legalis; Paratecoma peroba. |
| Ano: 2015 |
URL: http://pfb.cnpf.embrapa.br/pfb/index.php/pfb/article/view/927 |
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| Silva Júnior, Jessé Marques da; Universidade Federal de Lavras - UFLA; Paiva, Renato; Universidade Federal de Lavras - UFLA; Campos, Ana Carolina Atala Lombelo; Universidade Federal de Lavras - UFLA; Rodrigues, Marcelo; Universidade Federal de Lavras - UFLA; Carvalho, Milene Alves de Figueiredo; Universidade Federal de Lavras - UFLA; Otoni, Wagner Campos; Universidade Federal de Viçosa - UFV. |
| The technique of hybridization using plant protoplasts is widely used in plant breeding programs. The purpose of our study is to further characterize the process of protoplast isolation from the ornamental species Etlingera elatior (Jack) R. M. Smith. Protoplasts were isolated from different tissues: in vitro leaves, in vitro pseudostem, and leaves from plants cultivated hydroponically. We tested six enzymatic combinations, four incubation time periods, the rotary system (40 rpm) or steady in the dark, and three concentrations of mannitol (0.5, 0.6 and 0.7 M). The diameter and viability of obtained protoplasts were evaluated. The best source of explants used for protoplast isolation was the in vitro leaves, which yielded 22x105 protoplasts g-1 of fresh... |
| Tipo: Pesquisa Empírica |
Palavras-chave: Fisiologia Vegetal; Biotecnologia Vegetal; Melhoramento Genético FDA; Ornamental plant; Enzymatic combinations; Incubation period Melhoramento Vegetal. |
| Ano: 2011 |
URL: http://periodicos.uem.br/ojs/index.php/ActaSciAgron/article/view/12309 |
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| Almeida, Lorena Gabriela; Silva, Dayane Meireles da; Jorge, Adelcio de Paula; Souza, Kamila Rezende Dázio de; Guilherme, Luiz Roberto Guimarães; Alves, José Donizeti. |
| Agricultural species are subjected to a variety of biotic and abiotic stresses, which are the main limitations to crop production. In this context, contamination by trace elements is characterized as an abiotic stress that represents an environmental problem. Due to the physical and chemical similarities between cadmium and zinc, these elements may interact in the environment and may cause antagonistic or synergistic effects. In this way, physiological mechanisms to exclude, detoxify or compartmentalize trace elements that are in excess are crucial for plant survival when exposed to high concentrations of these elements. In this way, the aim of this study was to understand the physiological responses of Phaseolus vulgaris plants subjected to increasing... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Trace elements; Antioxidante enzymes; ROS; Photosynthesis; Synergism.; Fisiologia Vegetal. |
| Ano: 2018 |
URL: http://periodicos.uem.br/ojs/index.php/ActaSciAgron/article/view/35829 |
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| Boiago, Nayara Parisoto; Fortes, Andréa Maria Teixeira; Pilatti, Daiane Maria; Silva, Paulo Sérgio Siberti da. |
| This study aimed to analyse the allelopathic bioactivity of fresh and infused aqueous extracts of Brazilian cherry leaves on the germination of lettuce and the initial development of maize. Brazilian cherry leaves were used to prepare a fresh aqueous extract (200 g L-1) and an infused extract (100 g L-1), which were diluted to concentrations of 0.4, 0.8, 1.2, 1.6 or 2.0% w/v. The variables evaluated in lettuce were the germination rate (GR), germination time index (GTI), germination speed index (GSI) and root length (RL). To determine the effect on the initial development of maize, we measured the shoot (SL) and root (RL) length. The experimental design included a factorial 2 × 5 design (two extracts and five concentrations), in addition to a control... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: 2.03.00.00-0; 2.03.03.00-9 Lactuca sativa; Zea mays; Allelopathy; Allelochemicals; Chemical ecology. Botânica; Fisiologia Vegetal. |
| Ano: 2018 |
URL: http://periodicos.uem.br/ojs/index.php/ActaSciBiolSci/article/view/40972 |
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| Rossi, Zélia Terezinha Teixeira; Castro, Evaristo Mauro de; Pereira, Giuslan Carvalho; Barbosa, João Paulo Rodrigues Alves Delfino; Carvalho, Graziele Wolff de Almeida; Rossi, Marco Aurélio de Lima Silva; Pereira, Fabrício José. |
| Fluorides released during the manufacture of aluminum, fertilizers, glass and ceramics are considered to be highly toxic to plants, causing damages in relatively small concentrations. This study aimed to evaluate fluoride (F) accumulation and its effects on Vitex polygama Cham. (Verbenaceae) exposed to simulated rain containing potassium fluoride in concentrations of 5, 10, 15 and 20 mg L-1. Vitex polygama presented no visual symptoms of foliar injury and accumulated a relatively small amount of F-, significant only for the treatments with higher concentrations of the pollutant. F- promoted an increase in non-photochemical quenching (qN) and in the coefficient due to non-photochemical extinction (NPQ), which indicates higher dissipation of radiant energy... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: 2.03.00.00-0; 2.03.02.03-7; 2.03.03.00-9 chlorophyll a fluorescence; Potassium fluoride; Scanning electron microscopy; Transmission electron microscopy; Biomonitoring studies Botânica; Anatomia Vegetal; Fisiologia Vegetal. |
| Ano: 2016 |
URL: http://periodicos.uem.br/ojs/index.php/ActaSciBiolSci/article/view/31400 |
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| Registros recuperados: 45 | |
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