NODULAÇÃO DE LEGUMINOSAS COM POTENCIAL DE USO NA RECUPERAÇÃO DE ÁREAS DEGRADADAS EM CAMPO RUPESTRE QUARTZÍTICO

• Autor(a) principal: Pinheiro, André César
• Data de Publicação: 2023
• Outros Autores: Silva, Michele Aparecida Pereira da, Oliveira, Paula Alves, Pereira , Israel Marinho
• Tipo de documento: Artigo
• Idioma: por
• Título da fonte: Nativa (Sinop)
• Texto Completo: https://periodicoscientificos.ufmt.br/ojs/index.php/nativa/article/view/15346
• topic: nitrogênio; nodulação; Fabaceae; endemismo

The objective of this work was to evaluate the composition and structure of leguminous species in vegetal formation of rocky fields in Serra do Espinhaço Meridional, as well as to verify the diversity of nitrogen-fixing bacteria of the nodular species. The floristic survey was carried out in a reserve area belonging to the Anglo American mining company, based in the municipality of Conceição do Mato Dentro - MG. The region is located on the eastern edge of the Serra do Espinhaço Meridional and has a Cwa climate. To carry out the floristic survey, 25 fixed plots (10×10 m) were installed for the shrub-tree compartment and 60 fixed plots (1 × 2 m) for the herb-subshrub compartment. Absolute and relative density, absolute and relative frequency were estimated for both compartments. After the previous floristic survey, 40 root nodules of the species of Calliandra fasciculata and 23 of Moldenhawera emarginata were collected. Afterwards, bacteria were isolated from the nodules from the species C. fasciculata and M. emarginata. The cultural characteristics of the isolates were evaluated and from the data, it was possible to group the isolates through a cultural dendrogram using the Jaccard coefficient, using the MVSP (Multivariate Statistical Package) software. Three leguminous species were recorded in both compartments, totaling 1192 individuals distributed among C. fasciculata (with 1080 ind.), M. emarginata (with 86 ind.) and Periandra mediterranea (with 26 ind.). However, for the species P. mediterranea, no nodulation was observed in the field. The species C. fasciculata was responsible for 92.62% of the total number of individuals. From the morphological characteristics successfully evaluated, of the 23 isolates of C. fasciculata, 6 cultural groups were obtained. This result suggests high morphophysiological diversity of nitrogen-fixing bacteria nodulating the species in question, in a quartzite rock field environment. Due to the importance of this species, its use in recovery projects is recommended, especially in environments similar to the one in this study.