Mestrado em Biologia Vegetal
URI Permanente para esta coleção
Nível: Mestrado Acadêmico
Ano de início: 2002
Conceito atual na CAPES: 4
Ato normativo: Homologado pelo CNE (Portaria MEC Nº 609, de 14/03/2019.
Publicação no DOU 18 de março de 2019, seç. 1, p.52 - Parecer CNE/CES no 487/2018, Processo no 23001.000335/2018-51).
Periodicidade de seleção: Anual
Área(s) de concentração: Filosofia
Url do curso: https://biologiavegetal.ufes.br/pt-br/pos-graduacao/PPGBV/detalhes-do-curso?id=28
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Navegando Mestrado em Biologia Vegetal por Assunto "Aclimatação (Plantas)"
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- ItemDinâmica do fluxo e de reservatórios de carbono de três morfotipos de Paubrasilia echinata Lam. na fase juvenil e adulta, sob irradiância contrastante(Universidade Federal do Espírito Santo, 2019-02-20) Martins, Carlos Augusto Pagotto; Cuzzuol, Geraldo Rogério Faustini; Gomes, Marcos Thiago Gaudio; Milanez, Camilla Rozindo DiasIn view of the need to generate more knowledge about the best conditions for reforestation with native species, their preservation and on the quality of the wood used in the making of arches for string musical instruments, this work had as objective to evaluate the gas exchanges and the size of the carbon reservoirs of three morphotypes of Paubrasilia echinata Lam. in the juvenile and adult phases, under high and low irradiance. To achieve this purpose, two experiments were carried out. The first one analyzed photosynthesis and structural carbon (cell wall) structures in leaves and stems of juvenile plants of the small, medium and large morphotypes of P. echinata exposed to full sun and artificial shade. In the second experiment, the same variables of the first experiment were also analyzed, however, in adult plants of the three morphotypes with 12 year-old planted in full sun and natural shade under a forest of Atlantic forest fragment. The nonstructural carbohydrate contents (glucose, fructose, sucrose and starch) were analyzed only in the second experiment. Juvenile plants of the three morphotypes presented low levels of cellulose in the two light conditions. The medium and large morphotypes invested more in the production of cellulose and foliar hemicellulose in the shade, while in the full sun there was a greater increase of lignin. Adult plants of the three morphotypes presented higher levels of lignin in the stems and leaves in full sun. In the stems of adult plants, a lower concentration of soluble sugars (glucose and fructose) and a higher accumulation of sucrose and starch were observed in medium and large morphotypes in the full sun. The assimilation of CO2, stomatal conductance, transpiration and water use efficiency showed better performance of the small morphotype in the shade while the medium and large morphotypes, in full sun, in both juvenile and adult plants. In view of these results, the functional classification of the medium and large morphotypes as heliophiles and the small morphotype as umbrófilo is evident
- ItemInfluência da indução do amadurecimento e caracterização pós-colheita de frutos de genótipos de bananeira.(Universidade Federal do Espírito Santo, 2017-01-11) Oliveira, Gislane Chaves; Balbino, José Mauro de Sousa; Costa, Adelaide de Fátima Santana da; Silva, Diolina Moura; Guarçoni, Rogério CarvalhoBrazil is the fifth largest producer of banana in the world, one of the most consumed fruits in the world. The fruit quality standard from the harvest is one of the great challenges of Brazilian banana farming, directly interfering in the valorization of this product in the domestic market and the export of this fruit. This work evaluated the influence of post-harvest ripening induction on fruits of banana genotypes and the physical-chemical characterization after the climatization. The first experiment evaluated the influence of ripening induction, with and without ethylene, using two cultivars, Pratinha and Pacovan, and two periods of fruit analysis, after harvest: mature or completely yellow (E1) and good for consumption (E2). The characteristics of ripening, weight loss, firmness of the pulp, soluble solids (SS), pH, titratable acidity (AT) and the ratio (SS / AT) were evaluated. The second experiment had the objective of characterizing the fruits after the climatization, with four banana cultivars: Pratinha, Japira, Vitória and Pacovan and two maturation levels: mature (E1) and good for consumption (E2). At these stages, the following characteristics were evaluated: Ripening, Weight Loss, Length, Diameter, Shell thickness, Firmness and pH of the pulp, Soluble solids (SS), Titratable acidity (AT) and SS / AT ratio. The induction of ripening with exogenous ethylene applied to the banana varieties, provided a faster and more uniform maturation, offering better conditions for commercialization. In addition to characteristics such as firmer fruits, lower titratable acidity, and higher SS / AT ratio which precisely identifies the quality of the fruit. The application of exogenous ethylene was an important post-harvest treatment, which positively influenced fruit quality. In the second experiment, the varieties Japira and Vitória presented the best agronomic characteristics, such as firmer fruits, soluble solids contents determined from the first stage, besides these varieties presented superior characteristics, still meet the requirements of Food Safety, because they are resistant cultivars the main diseases that threaten the banana plantations of the national territory.
- ItemPlasticidade fenotípica de plantas jovens de Handroanthus chrysotrichus (Mart. Ex DC.) Mattos (Bignoniaceae) em resposta a radiação solar(Universidade Federal do Espírito Santo, 2012-02-28) Soares, Manuela Gonoring; Milanez, Camilla Rozindo Dias; Fontes, Renata Venturim; Chambô Filho, AntônioThe ability of plants to show functional adaptive responses in relation to environmental conditions is known as plasticity and can be expressed by the acclimation process. In the forest environment, light is a major factor in the establishment and distribution of plant species. In this context, more plastic species have higher survival rates in relation to the variation of light availability. Adjustments can be physiological, morphological and anatomical and vary with the level of radiation exposure and the characteristics of plasticity of the individual. Thus, this study aimed to evaluate the plasticity of young plants of Handranthus chrysotrichus in response to different light intensities. For this purpose, plants were subjected to three treatments: full sun (100% of solar radiation), moderate shade (50% of solar radiation) and severe shading (5% of solar radiation). The plasticity was evaluated by analyzing changes in physiological characteristics levels, morphological and anatomical. Analyses of growth, photosynthetic pigments content, leaf soluble carbohydrates, antioxidant enzymes (catalase and ascorbate peroxidase), leaf anatomy (thick cuticle, epidermis, palisade parenchyma, paravenal mesophyll, spongy mesophyll and stomatal density) and stem anatomy (thickness of the periderm, secondary phloem, vascular cambium, secondary xylem, diameter, length and density of vessels), histochemical tests and plasticity index (PI) after 90 and 200 days of treatment. For leaves, were evaluated leaves pre-existing to the treatments and new leaves that emerged. Plants show responses commonly found in species adapted to sun and shade. Growth was stimulated in response to high irradiance by the greater accumulation of dry weight and leaf soluble carbohydrates. The content of photosynthetic pigments was higher in plants under severe shading. The catalase activity was lower in plants grown under full sun and the enzyme ascorbate peroxidase did not vary between treatments at the end of the experiment. In relation to leaf anatomy, there were variations in the thickness of the cuticle, of measured leaves tissues and stomatal density. The stem showed variation in the measured tissue thickness, diameter and density of vessels. The anatomic variables analyzed showed higher values in plants in full sun and moderate shade. Regarding the histochemical tests, differences were found in the deposition of starch grains in stem tissues, most in full sun. The analysis of IP demonstrated that the adjustments after 90 days of treatment were predominantly physiological. The content of photosynthetic pigments and the total dry mass were the most plastic characteristics. However, after 200 days of treatment, the settings were predominantly morphological (specific leaf mass, specific leaf area, leaf area ratio, as well as the production of total dry mass), leaf anatomical (thickness of the spongy parenchyma, stomatal density) and anatomical stem (thickness range of vascular cambia). The results indicate that young plants of H. chrysotrichus exhibit great plasticity to the variation of light availability, which makes this recommended species for reforestation and reclamation