| Texto completo | |
| Autor(es): |
Moreira, Milene
;
Baretta, Dilmar
;
Tsai, Siu Mui
;
Bran Nogueira Cardoso, Elke Jurandy
Número total de Autores: 4
|
| Tipo de documento: | Artigo Científico |
| Fonte: | CIENTIA AGRICOL; v. 66, n. 5, p. 8-pg., 2009-01-01. |
| Resumo | |
Araucaria angustifolia is an important Brazilian conifer, but it is endangered of extinction due to excessive logging. The objective of the present case study was to survey data on the diversity of AMF in Araucaria angustifolia forests, and to learn whether it is possible to discriminate between the AMF communities associated with natural, introduced, and impacted-by-anthropogenic-action ecosystems. Three ecosystems representative of the Campos do Jordao (Sao Paulo State, Brazil) region were selected, as follows: (i) a native climax forest, with predominance of Araucaria trees, without anthropogenic interference (NF), (ii) Araucaria forest introduced in 1959 (RE), and (iii) Araucaria forest introduced in 1958, submitted to accidental fire in July 2001 (RF). Sampling of rhizosphere soil was performed at a 0-20 cm depth around each Araucaria tree, and 2 m from the trunk, in the months of May and October, 2002. AMF spores were separated from the soil, counted, and taxonomically identified, while the roots were evaluated for mycorrhizal colonization. The ecological indices R (Richness), Is (Simpson's dominance index) and H (Shannon's diversity index) were calculated. All the data were submitted to univariate (two-way ANOVA) and correspondence analysis (CA). Considering both samplings and the three areas, twenty-six AMF species were found, distributed among five genera, Acaulospora and Glomus being the most frequent ones. There were no differences among the three areas for R, Is, and H. CA demonstrated that there is a spatial separation among the three areas, and the AMF that preferentially associated with each area. (AU) | |
| Processo FAPESP: | 01/13229-9 - Detecção e quantificação de fungos micorrízicos arbusculares (FMA, Glomales) em planta de Araucaria angustifolia (Bert.) O. Ktze. utilizando primers específicos da região ITS |
| Beneficiário: | Milene Moreira da Silva |
| Modalidade de apoio: | Bolsas no Brasil - Pós-Doutorado |
| Processo FAPESP: | 01/05146-6 - Biodiversidade vegetal e de organismos edáficos em ecossistemas de Araucaria angustifolia naturais e impactados no estado de São Paulo |
| Beneficiário: | Elke Jurandy Bran Nogueira Cardoso |
| Modalidade de apoio: | Auxílio à Pesquisa - Programa BIOTA - Temático |
| Processo FAPESP: | 07/05637-6 - Biodiversidade da macrofauna edáfica e outras variáveis explicativas como indicadores da qualidade do solo em florestas de araucária |
| Beneficiário: | Dilmar Baretta |
| Modalidade de apoio: | Bolsas no Brasil - Pós-Doutorado |