Tesis
Densidade populacional de fungos e o potencial biotecnológico em área sob restauração florestal no ecótono cerrado / Amazônia
Fecha
2015-02-26Registro en:
KAVASAKI, Kaynara Fabíola Lima. Densidade populacional de fungos e o potencial biotecnológico em área sob restauração florestal no ecótono cerrado / Amazônia. 2015. 59 f. Dissertação (Mestrado em Agronomia) - Universidade Federal de Mato Grosso, Instituto de Ciências Agrárias e Ambientais, Sinop, 2015.
Autor
Ferreira, Anderson
http://lattes.cnpq.br/6878691373643793
Ferreira, Anderson
029.760.769-36
http://lattes.cnpq.br/6878691373643793
Alfenas, Rafael Ferreira
064.465.376-03
http://lattes.cnpq.br/3253620101782295
029.760.769-36
Chitarra, Luiz Gonzaga
622.802.957-68
http://lattes.cnpq.br/5329392306332235
Institución
Resumen
The Cerrado and Amazon transition area includes part of biomes with
incalculable biodiversity value, however, this area are inside of expansion from
agricultural frontier, which may cause negative environmental impacts. Thus, there is
a growing demand for alternatives aimed to reduce land degradation through forest
restoration. In this sense, evaluate the microbial community from soil will contribute to
understand the impact of these techniques on the soil quality as well bioprospect
microorganisms with biotechnological potential as biocontrol of plant pathogens. The
objective of this study was to quantify and bioprospect fungi antagonistic to
Rhizoctonia solani and Fusarium oxysporum, present in a soil under forest
restoration and in a native-forest area. Ten forest-restoration treatments and a
native-forest area were evaluated. Fungal isolation and evaluations of antagonism
were performed on PDA medium. Antagonist isolates were identified by sequencing
rDNA region ITS1-58S-ITS2. When the amount of fungi present was evaluated, the
treatments did not differ from each other in their same year of collection, only when
compared with the native forest and between years. Of the evaluated isolates, 23
showed antagonistic potential against the studied plant pathogens. Of the ten
evaluated treatments, T3 (broadcast seeding of native species/green fertilizers) and
the native forests did not show any antagonistic isolate. After taxonomic
identification, the isolates were classified as belonging to four genera: Talaromyces,
Aspergillus, Taifanglania, and Beauveria. The results indicate the microbiological
parameters of the studied area should be evaluated continuously, as they may help
determine strategies regarding the forest restoration treatments, contributing to the
preservation/restoration of degraded areas and maintenance of the microbial
biodiversity.