https://ri.ufs.br/jspui/handle/riufs/2138 Sat, 09 May 2026 05:18:36 GMT 2026-05-09T05:18:36Z https://ri.ufs.br/jspui/handle/riufs/24995 Título: Expressão de memória de estresse em sementes e mudas de Cenostigma pyramidale (Tul.) E. Gagnon & G.P. Lewis : influência da alta temperatura e da hidratação descontínua Autor(es): Santos, Filipe Andrade dos Abstract: In dry ecosystems, seeds may be exposed to pulses of high temperature and discontinuous hydration during germination. Beyond acting as stressors, these events can function as environmental cues that induce persistent adjustments and modulate germination as well as resilience to water deficit. This dissertation aimed to evaluate how exposure of seeds to high- temperature pulses and hydration–dehydration (HD) cycles influences the expression of stress memory in seeds and seedlings of Cenostigma pyramidale, a woody legume widely distributed in the Caatinga. Accordingly, the dissertation was structured into four articles. In Article I, we assessed the effects of HD cycles applied at different imbibition stages on germination and Early growth. HD cycles applied during early hydration increased germination and growth-related parameters, whereas cycles imposed at later stages reduced germination performance and seedling growth. In Article II, seeds were subjected to thermal pulses of 55, 65, and 75 °C for 30, 60, and 90 min. The results indicated high germination resilience, although germination kinetics and synchrony varied with pulse intensity and duration. In Article III, we tested the influence of pre-germinative treatments (high temperature, HD cycles, and their combination) on germination under water deficit induced with PEG 6000. Prior experiences reorganized the temporal dynamics of germination, consistent with stress memory. In Article IV, we examined the persistence of these signals during the seedling stage under intermittent drought, showing that stress memory is also expressed in seedlings, enhancing resilience and recovery after rehydration through physiological adjustments. We conclude that C. pyramidale responds to semiarid conditions not only through resistance, but also through plasticity triggered by heat and discontinuous hydration cues, expressed during the seed phase and early establishment. Wed, 04 Feb 2026 00:00:00 GMT https://ri.ufs.br/jspui/handle/riufs/24995 2026-02-04T00:00:00Z https://ri.ufs.br/jspui/handle/riufs/24993 Título: Letramento ambiental e caatinga : experiência em escola da zona rural no município de Cícero Dantas/BA Autor(es): Santana, Lucila Teles de Abstract: This study aims to investigate and promote environmental literacy at the Marinho Gomes de Oliveira Municipal School, located in the São João da Fortaleza District, in the municipality of Cícero Dantas, Bahia, aiming to strengthen environmental education among students, educators, and the community. To this end, a mixed methodological approach is adopted, combining qualitative and quantitative methods. Educational activities will be developed, such as workshops, field trips, mapping of caatinga flora species, discussion groups, lectures, and other activities focused on raising awareness and environmental education. The theoretical framework encompasses core concepts of environmental literacy, environmental education, sustainable development, and innovative pedagogical practices, drawing on the contributions of Freire (1996), Morin (2001), and Araújo (2012), among others. The research is grounded in approaches that promote meaningful learning, critical reflection, and transformative action in the face of environmental issues. The study's relevance lies in the growing urgency of environmental education in the face of global challenges such as the climate crisis, biodiversity loss, and ecosystem degradation. In this context, schools play an essential role in developing critical and conscientious citizens capable of acting responsibly and sustainably. The research is expected to contribute to strengthening environmental literacy among students, teachers, management, and the school community, encouraging sustainable practices and fostering a culture of participation, engagement, and socio-environmental responsibility. Thu, 28 Aug 2025 00:00:00 GMT https://ri.ufs.br/jspui/handle/riufs/24993 2025-08-28T00:00:00Z https://ri.ufs.br/jspui/handle/riufs/24928 Título: Caracterização das propriedades estruturais e magnéticas da série SmF e1−xMnxO3 Autor(es): Silva, Cláudia Adriana da Abstract: Continuar depois... Fri, 10 Feb 2012 00:00:00 GMT https://ri.ufs.br/jspui/handle/riufs/24928 2012-02-10T00:00:00Z https://ri.ufs.br/jspui/handle/riufs/24916 Título: Junho de 2013 continuado por outros meios: os movimentos de renovação política e a institucionalização do engajamento cívico no Brasil contemporâneo Autor(es): Barbosa, Saulo Vinicius Souza Abstract: This doctoral thesis examines the social and political conditions underlying the processes of legitimation and institutionalization of civic engagement in contemporary Brazil. It focuses on the case of RenovaBR, the most prominent among the organizations known as “Political Renewal Movements” (PRM). These initiatives emerged largely in response to the critical juncture that followed the June 2013 contention cycle . In this context, the research analyzes the social backgrounds and associative ties of the 118 candidates supported by RenovaBR in the 2018 elections, seeking to understand how, in the wake of post-2013 political opportunities, the organization worked to redirect its members’ civic engagement toward representative institutions through electoral participation. The analysis unfolds across three complementary axes. The first reconstructs the historical conditions that enabled the emergence of the PRM – especially RenovaBR – highlighting how they were shaped through the discursive appropriation of the legitimacy crisis affecting Brazil’s political system. The second investigates the social trajectories and political agenda of the 2018 Renova candidates’, linking them to ideas and actors that surfaced during the 2013 cycle of mobilizations. The third maps the ties between these candidacies and civil society organizations, revealing how political renewal is structured through specific associative circuits. Drawing from this analytical framework, the thesis argues that political renewal groups reframed diffuse and contentious criticisms of the political system and the state – articulated between 2013 and 2016 – into a project of institutional occupation. In doing so, the so-called “renewers” mobilized technical competencies, connections to organized civil society, and the discourse of political professionalization as strategies for public legitimation. The study further shows that, on the one hand, such initiatives can be interpreted as responses to the crisis of representation and the closure of the Brazilian party system, as recognized in existing literature. On the other hand, it demonstrates that, despite their rhetoric of inclusion of the “ordinary citizen” in politics, these organizations are grounded in a selective ecology of civil society actors, primarily linking middle- and upper-class participation and associative networks to non-hegemonic center and right-wing political parties. Finally, the dissertation contributes to the scholarly agenda on the outcomes of collective action by proposing that the PRM be understood as institutional legacies of the 2013 protest cycle – translating social demands into non-contentious repertoires of institutional engagement. In this sense, the emergence of these groups is interpreted as an attempt by specific sectors of civil society to continue the political impulse of June 2013 by other means. Fri, 29 Aug 2025 00:00:00 GMT https://ri.ufs.br/jspui/handle/riufs/24916 2025-08-29T00:00:00Z