Densidade populacional e bioprospecção de bactérias com potencial antagonista em solo sob restauração florestal no ecótono Cerrado/Amazônia

Abstract

Techniques which minimize the impact resulting from use and handling of the soil have been studied and applied to minimize these effects. An instrument to revert the environmental degradation, is forest restoration. This study was made in an area previously used to agricultural practices, now submitted to different strategies of forest restoration. The object was quantify the cultured bacterias present in soil under different treatments of restoration and in area of remaining forest and evaluate potential of antagonism against phytopathogenic fungi: Fusarium oxysporum e Rhizoctonia solani. There was no significant difference among treatments, when evaluated in its respective year of collect. When compared the equal treatments between a year and another, there was significant difference among treatments T1,T2,T3,T6 e T8. There was no significant difference in any year when compared treatments with the area of remaining forest. The isolates antagonists to phytopathogens, were classified as belonging to Filo Firmicutes and Proteobacteria. The indentified isolates are formed by bacteria of genus Bacillus, Brevibacillus, Burkholderia, Paenibacillus e Variovorax. This is the first quantification report and bioprospecting of bacteria in different treatments of forest restoration in ecotone Cerrado/Amazon and serve as a basis for potential biotechnological studies of these microorganisms. These results may help in deciding which forest restoration strategies in this region.