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(Reference retrieved automatically from Web of Science through information on FAPESP grant and its corresponding number as mentioned in the publication by the authors.)


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Moreira, Milene [1] ; Baretta, Dilmar [2] ; Tsai, Siu Mui [3] ; Bran Nogueira Cardoso, Elke Jurandy [4]
Total Authors: 4
[1] APTA Polo Reg Medio Paranapanema, BR-19800970 Assis, SP - Brazil
[2] UDESC CEO, Lab Solos, BR-89806070 Chapeco, SC - Brazil
[3] USP, CENA, Lab Microbiol & Biol Mol, BR-13416000 Piracicaba, SP - Brazil
[4] USP, ESALQ, Depto Ciencia Solo, BR-13418900 Piracicaba, SP - Brazil
Total Affiliations: 4
Document type: Journal article
Source: Scientia Agricola; v. 66, n. 5, p. 677-684, 2009.
Web of Science Citations: 14

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)

FAPESP's process: 01/05146-6 - Plant biodiversity and soil organisms associated to natural and disturbed Araucaria angustifolia ecosystems of the State of São Paulo
Grantee:Elke Jurandy Bran Nogueira Cardoso
Support type: BIOTA-FAPESP Program - Thematic Grants
FAPESP's process: 07/05637-6 - Soil macrofauna biodiversity and others explanatory variables as soil quality indicators in Araucaria forests
Grantee:Dilmar Baretta
Support type: Scholarships in Brazil - Post-Doctorate