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A memória ao estresse preserva a produtividade da soja?
(Universidade Estadual de Goiás, 2026-04-10)
Gratão, Mariana Souza
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Matos, Fábio Santos
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https://orcid.org/0000-0002-7666-006X
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http://lattes.cnpq.br/0258329188698317
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https://orcid.org/0000-0003-0791-5783
The intensification of drought events has significantly compromised soybean productivity, especially in regions subjected to climatic variability. In this context, the objective was to identify the importance of physiological memory to stress in the growth and grain production of soybeans. The experiment was conducted in a greenhouse at the State University of Goiás, using a completely randomized design composed of treatments with different continuous and discontinuous water deficit regimes, applied in one or two cycles, in addition to a fully irrigated control treatment. Water deficit reduced relative water content and promoted changes in vegetative growth. However, severe and moderate deficit treatments showed distinct responses, even under similar reductions in plant water status. The severe deficit treatment maintained greater leaf area and productive performance comparable or superior in some variables, such as 100-grain weight. Regarding biochemical responses, increases in total chlorophyll and carotenoid contents were observed, in addition to changes in the activity of antioxidant enzymes CAT, SOD, and POD. The relative maintenance of CAT activity under severe deficit suggests the participation of antioxidant mechanisms associated with drought tolerance. Multivariate analysis evidenced integration among morphophysiological, biochemical, and productive responses. The obtained results suggest the occurrence of physiological mechanisms compatible with acclimation processes and possible physiological memory in plants subjected to successive water deficits, reinforcing the adaptive potential of soybean under conditions of water variability.
Desponte e anelamento na diferenciação floral, produtividade e qualidade das uvas no sistema dupla poda para colheita de inverno
(Universidade Estadual de Goiás, 2026-04-24)
Nader, Claudiene Cristina da Silva
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Berti, Mariana Pina da Silva
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https://orcid.org/0000-0001-6741-6471
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http://lattes.cnpq.br/9006953786765137
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https://orcid.org/0009-0005-4955-6899
Viticulture in the Brazilian Cerrado has stood out with the use of double pruning for harvesting during the dry winter, but complementary practices such as topping and girdling still lack validation for the Sauvignon Blanc cultivar. This study evaluated the effects of topping, girdling, and their combination on grape quality in Ipameri-GO. The design was completely randomized with four treatments (control, topping, girdling, topping + girdling) and three replications. While there was no significant effect on productivity and soluble solids, the combined treatment (topping + girdling) promoted a significant increase in berry weight, thickness, and length, in addition to reducing must pH without altering titratable acidity. This result indicates favorable modulation of the source-sink balance and higher active acidity, a desirable characteristic for oenological quality. It is concluded that the association between topping and girdling is a promising strategy to improve the qualitative attributes of Sauvignon Blanc grapes in the double pruning system in the Cerrado.
Perda e fragmentação de habitats em paisagens com uso agrícola no sudeste goiano e seus efeitos em mamíferos de médio e grande porte
(Universidade Estadual de Goiás, 2026-04-23)
Alves, Emilly Nogueira
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Rocha, Ednaldo Cândido
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https://orcid.org/0000-0002-2554-777X
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http://lattes.cnpq.br/9200178886364293
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https://orcid.org/0000-0002-7230-6055
Habitat loss and fragmentation are among the main threats to biodiversity in the Brazilian Cerrado, particularly for medium- and large-sized mammals. This study evaluated the effects of changes in landscape configuration on mammal species richness and composition in five areas of southeastern Goiás, Brazil, considering two distinct periods (2014 and 2025). Active surveys and camera trapping were used to record species, while landscape metrics (fragment area, habitat amount, number of fragments, and mean Euclidean distance between fragments) were derived from satellite images previously processed in a Geographic Information System (GIS), converted into raster format in QGIS, and subsequently calculated in RStudio. The results revealed the occurrence of 30 species distributed across eight orders, with a predominance of generalist species. Species richness varied among areas and periods, showing trends of increase, decline, or stability over time. These variations were mainly associated with habitat amount and fragment area, both of which showed a positive relationship with species richness, as well as with the potential effects of increased sampling effort between the two periods. The analyses highlighted that mammal conservation depends on the integrated functionality of the landscape rather than solely on the preservation of isolated habitat fragments. These findings reinforce the importance of management strategies that reconcile agricultural land use with biodiversity conservation in the Cerrado, such as maintaining native vegetation remnants, establishing ecological corridors, restoring degraded areas, protecting riparian forests, and adopting more sustainable production practices.
Desvendando Mecanismos Moleculares do Halotano e do Ácido Ascórbico: dinâmica de Surface Hopping na racionalização da Fotodissociação atmosférica, das razões de ramificação e da inversão Quiral do Halotano; e Dinâmica Molecular de Car–Parrinello na Investigação da Solvatação
(Universidade Estadual de Goiás, 2026-06-19)
Lopes, Yago Francisco
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Ribeiro, Luciano
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https://orcid.org/0000-0001-6988-9766
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http://lattes.cnpq.br/8085209779362242
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http://lattes.cnpq.br/7469478053328125
The elucidation of photochemical and solvation processes requires approaches capable of integrating electronic structure, molecular dynamics, and solvent effects. In this thesis, halothane was investigated along two main axes: excited- state photodynamics, with emphasis on the selective dissociation of carbon– halogen bonds and chirality inversion, and solvation in aqueous solution. In parallel, ascorbic acid was used as a water-soluble system to investigate hydration networks stabilized by hydrogen bonds. Ab initio molecular dynamics simulations were performed within the Car–Parrinello formalism (CPMD/PBE), complemented by TDDFT calculations and nonadiabatic dynamics using the Surface Hopping approach. Solvation was characterized through pair radial distribution functions (PRDFs) and mean residence times (MRTs), whereas electronic and topological properties were analyzed using NTO, QTAIM, and RDG methods. For halothane photodynamics, 138 trajectories initiated in S1 and S4 were classified according to their structural outcomes. Molecular stabilization was the most frequent result (51.4%), followed by chirality inversion (25.4%) and permanent dissociation (23.2%). The initial electronic state influenced the selectivity, with a greater contribution of dissociative processes in S4 and an overall predominance of C–Cl cleavage, resulting in a C–Cl:C–Br ratio of 2.20:1. In contrast, 71.4% of the configurational inversion events were associated with the C–Br coordinate, revealing distinct tendencies for fragmentation and stereochemical reorganization. Temporal analysis of 119 trajectories yielded a mean first-arrival time at S0, ts0, of 986.66 fs, with later access to the ground state for trajectories initiated in S4 and for those associated with dissociation or inversion. In aqueous solution, halothane preserved its structural integrity and exhibited weakly structured solvation, characterized by weak and transient interactions consistent with its hydrophobic character. For ascorbic acid, CPMD/PBE simulations revealed selective solvation, particularly at the H(1) and H(2) sites, with persistent hydrogen bonds, characteristic distances close to 2.5 Å, residence times between 10 and 15 ps, and free energies around −10 kcal mol−1. Overall, the results demonstrate that the combination of ab initio molecular dynamics, nonadiabatic dynamics, and electronic and topological analyses enables the connection of electronic structure, nuclear motion, photochemical selectivity, and solvent organization. This thesis advances the molecular understanding of photodissociation, stereochemical reorganization, and solvation processes relevant to atmospheric chemistry and the behavior of biomolecules in solution.
Formação continuada de professores: uma intervenção crítica nos anos iniciais do ensino fundamental por meio do ensino por investigação
(Universidade Estadual de Goiás, 2026-04-23)
Paula, Viviane Daniela Soares de
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Carvalho, Plauto Simão de
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https://orcid.org/0000-0002-5467-5754
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http://lattes.cnpq.br/4108262957994798
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Paulo, Pedro Oliveira
This research analyzes continuing teacher education as a strategy for implementing Inquiry-Based Science Teaching (IBST) in the early years of Elementary Education in the municipal school system of Rubiataba (GO), Brazil, articulated with the generative theme of selective waste collection. The study is grounded on an initial diagnosis that revealed a gap between teachers' theoretical knowledge and their classroom practices: although 85.7% reported being familiar with IBST, only 36.8% applied it systematically, due to factors such as generalist initial training, lack of pedagogical resources, and curricular pressures arising from large-scale assessments. Methodologically, it is characterized as a qualitative study of an applied nature, initially involving 22 teachers from the early years of Elementary Education, of whom 20 completed the formative process. Data were produced through questionnaires, lesson plan analysis, participant observation, focus group discussions, and monitoring of the implementation of Investigative Teaching Sequences (ITSs), developed within a hybrid continuing education program. The results indicate not only teacher engagement, but also a process of gradual approximation with investigative pedagogical practices, marked by an increased use of investigative questions, greater intentionality in problematizing scientific content, and the initial incorporation of argumentative practices in classroom activities. These changes occurred in a non-linear and context-dependent manner, marked by tensions, structural constraints, and methodological insecurities, evidencing that changes in teaching practice are processual and situated rather than immediate. As an outcome of the research, an educational product was developed and validated in a real teaching context, consisting of a structured continuing education course and a pedagogical guide based on ITSs, implemented by the participating teachers. Validation was achieved through classroom application, systematic monitoring of teaching practices, and analysis of impacts on instructional organization and student engagement. From an educational perspective, the study contributes to strengthening inquiry-based teaching practices and expanding teachers' understanding of IBST and its articulation with Scientific Literacy. From a social perspective, it highlights the potential of connecting science education with local realities, particularly by integrating selective waste collection as an integrating axis between scientific knowledge, environmental education, and citizenship formation. It is concluded that continuing education, when contextualized, dialogical, and articulated with concrete pedagogical tools, constitutes a fundamental strategy for implementing IBST in school contexts with structural limitations, contributing to the consolidation of more critical, inquiry-oriented, and socially relevant pedagogical practices