Bacharelado em Ciências Biológicas (Sede)
URI permanente desta comunidadehttps://arandu.ufrpe.br/handle/123456789/5
Siglas das Coleções:
APP - Artigo Publicado em Periódico
TAE - Trabalho Apresentado em Evento
TCC - Trabalho de Conclusão de Curso
Navegar
2 resultados
Resultados da Pesquisa
Item Influência do cocultivo de bactérias promotoras de crescimento no desenvolvimento morfofisiológico de Canistrum aurantiacum (Bromeliaceae)(2024-03-07) Ferreira, Esdras de Souza; Silva, Cláudia Ulisses de Carvalho; Oliveira, Henarmmany Cristina Alves de; http://lattes.cnpq.br/6859724202937192; http://lattes.cnpq.br/7161911278790052; http://lattes.cnpq.br/0201835717024585The reintroduction of vulnerable species is a common practice in ecological conservation and restoration, aiming to address the challenges arising from habitat fragmentation and climate change. However, reintroduction attempts of native plants, such as Canistrum aurantiacum, often encounter difficulties in establishing lasting reproductive populations. A promising approach to improve the success of these reintroductions is co-cultivation with growth-promoting bacteria (GPBs), which can benefit plant development at various stages of cultivation. This study sought to evaluate the impact of GPB co-cultivation on the growth and development of C. aurantiacum seedlings. The experiment was conducted in a greenhouse attached to the Plant Physiology Laboratory (LFP) at the Federal Rural University of Pernambuco (UFRPE), Recife-PE. Seeds of C. aurantiacum were sown in trays containing organic substrate and washed sand. After 90 days, the plants were transplanted into containers containing a mixture of organic substrate and sand, previously sterilized. Five GPB treatments, including a control, with 10 replicates each, were used. The plants were inoculated with bacterial suspension or sterile deionized water and maintained under these conditions for 64 days. Biometric and total chlorophyll content analyses were conducted throughout the experiment. The data obtained were analysed using ANOVA, and the means were compared employing the Tukey test at a 5% significance level. However, no significant differences were observed between the treatments regarding these variables. The results indicate that GPB inoculation had no significant effect on the growth and chlorophyll content of C. aurantiacum during the study period. This finding suggests that other factors, such as interspecific interactions between plants and microorganisms, may have influenced plant development. Therefore, further research is needed to better understand the effectiveness of GPB co-cultivation as a management strategy for vulnerable species in reintroduction programs.Item Efeitos de variações na luminosidade no crescimento vegetativo de Chamaecrista rotundifolia (Pers.) Greene, uma herbácea perene da Caatinga(2021-12-17) Silva, Lucca Leonardo Rendall; Araújo, Elcida de Lima; Aguiar, Bruno Ayron de Souza; http://lattes.cnpq.br/2829559518802671; http://lattes.cnpq.br/6239993539613839; http://lattes.cnpq.br/5047335299627536Light variations in the Caatinga are due to habitat fragmentation and natural variation in the tree canopy, which influence the growth and development of herbaceous plants. Aiming to understand the strategies of Chamaecrista rotundifolia (Pers.) Greene, a perennial herb from the Caatinga, with variation in light, this study hypothesizes that, as this factor decreases, there is a reduction in the area, longevity and production of leaves of this species. Individuals clustered in clearings, and a total of 400 seeds were randomly collected in the Caatinga fragment of the Agronomic Research Institute (IPA), Caruaru-PE. The seeds were germinated and 120 viable seedlings were placed in 4 treatments (T) with different percentages of light: T100: full sun, T70: 70%, T50: 50%, T30: 30%; 30 reps each; duration of 6 months. We measured the length and width of previously marked leaves on a weekly basis, so that we could measure the relative growth rate in leaf area (FCRAf), using specific allometric equations for this species. We measured longevity (LF) and total leaf production (PTF). We evaluate the results using GLMs (Generalized Linear Models). We found that there were no very significant differences in relative leaf growth rates between the light availability treatments. The lowest total leaf production (TFP) was similar between T30 and T50, differing from the other treatments. Compared to T100, there was a reduction in sheet production of up to 91.64% observed in T30. In addition to the higher leaf production at T100, we observed that this treatment also had the highest leaf abscission (PEF) values during monitoring. With more than 97% loss in T30 when compared to T100. And as for leaf longevity, we found that only 8% was explained by the reduction in light availability. All vegetative characteristics analyzed were plastic, with greater emphasis on the plasticity index of the relative distance of the attributes: number of leaves (0.73), height (0.68) and diameter (0.56), respectively, more plastics during the study. Extreme variations in luminosity normally have a negative impact on the primary metabolism of plants, however, specifically for this species from the Caatinga, the increase in this factor proved to be advantageous for its success in growth and establishment in this stochastic environment. Thus, added to its low nutritional requirement and large production of biomass and nutrient deposition in the soil, the species C. rotundifolia proved to be an excellent pioneer species, which can be used in the restoration of degraded environments.