Mycological Progress

, Volume 17, Issue 10, pp 1149–1159 | Cite as

Arbuscular mycorrhizal fungi (Glomeromycota) communities in tropical savannas of Roraima, Brazil

  • Sidney Luiz Stürmer
  • Karl Kemmelmeier
  • Bruno Coutinho Moreira
  • Maria Catarina Megumi Kasuya
  • Gilmara Maria Duarte Pereira
  • Krisle da Silva
Original Article


Savanna vegetation in the northern region of Brazil is jeopardized by several anthropogenic activities including cattle ranching and extensive agriculture, and soil biota of these ecosystems is virtually unknown. The soils in savannas are poor in nutrients, very acidic, and subject to drought, and under these conditions, arbuscular mycorrhizal fungi (AMF) are likely to play a key role on plant nutrition and improving soil structure. In this study, we surveyed AMF communities in five savanna locations in Roraima state, Northern Brazil. AMF species were identified using two approaches: field collected spores and trap cultures. Twenty-three AMF species were identified, including 21 species in field samples, 8 species in trap cultures, of which 15 and 2 were unique to field and trap culture samples, respectively. Gigaspora margarita, Dentiscutata heterogama, and Glomus sp1 were the most frequent species recovered from all locations. AMF communities were dominated by members of Gigasporaceae that accounted for 50 to 87% of the total species richness within each location. Spore numbers differed across locations and ranged from 5 to 25 spores 100 cm−3 soil. Redundancy analysis indicated that soil organic matter was the only selected predictor among soil parameters and correlated positively with occurrence of Glomus heterosporum. We conclude that savannas in Roraima harbor a high sporulating AMF species richness with communities dominated by members of Gigasporaceae and that organic carbon is an important edaphic factor influencing AMF community composition in this ecosystem.


Mycorrhiza Neotropics MPN Species diversity Trap cultures 



We would like to thank Andressa Franzoi Sgrott for technical assistance and Chaiane Schoen and Alexandre Uhlmann for helping with the statistical analyses. SLS thanks the CNPq for a Research Assistantship (Process 302343/2012-1).

Funding information

This study was funded by the Conselho Nacional de Desenvolvimento Científico e Tecnológico (CNPq, Grant No. 483.657/2011-5).


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Copyright information

© German Mycological Society and Springer-Verlag GmbH Germany, part of Springer Nature 2018

Authors and Affiliations

  1. 1.Departamento de Ciências NaturaisUniversidade Regional de BlumenauBlumenauBrazil
  2. 2.Colegiado de Engenharia AgronômicaUniversidade Federal do Vale do São FranciscoPetrolinaBrazil
  3. 3.Departamento de Microbiologia, Lab de Associações Micorrízicas/BIOAGROUniversidade Federal de ViçosaViçosaBrazil
  4. 4.Centro de Estudos da BiodiversidadeUniversidade Federal de RoraimaBoa VistaBrazil
  5. 5.Empresa Brasileira de Pesquisa Agropecuária (EMBRAPA)ColomboBrazil

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