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Arbuscular Mycorrhizal Fungi and Soil Quality Indicators in Eucalyptus genotypes With Different Drought Tolerance Levels

Authors
  • Lopes, Bruna Andreia de Bacco1
  • Silva, Antonio Marcos Miranda1
  • Santana, Maiele Cintra1
  • Feiler, Henrique Petry1
  • Pereira, Arthur Prudêncio de Araújo2
  • Teixeira, Marcos Ferreira1
  • Araújo, Victor Lucas Vieira Prudêncio de...1
  • Ávila, Patrícia Andressa de3
  • Gonçalves, José Leonardo de Moraes3
  • Staunton, Siobhan4
  • Cardoso, Elke Jurandy Bran Nogueira1
  • 1 Department of Soil Science, “Luiz de Queiroz” College of Agriculture, University of São Paulo, São Paulo , (Brazil)
  • 2 Soil Microbiology Laboratory, Soil Science Department, Federal University of Ceará, Ceará , (Brazil)
  • 3 Department of Forest Sciences, “Luiz de Queiroz” College of Agriculture, University of São Paulo, São Paulo , (Brazil)
  • 4 Eco&Sols, INRAE-IRD-Cirad-SupAgro, Montpellier , (France)
Type
Published Article
Journal
Frontiers in Fungal Biology
Publisher
Frontiers Media S.A.
Publication Date
Jun 20, 2022
Volume
3
Identifiers
DOI: 10.3389/ffunb.2022.913570
Source
Frontiers
Keywords
Disciplines
  • Fungal Biology
  • Original Research
License
Green

Abstract

Silviculture has great importance worldwide, and the use of Eucalyptus species, which account for 75% of the local planted forest in Brazil, is one of the factors that contributes to the success of this activity in the country. Despite its adaptability, the yield of Eucalyptus is often affected by climate change, particularly water deficiency. Plants have developed strategies to mitigate water stress, for example, through their association with mycorrhizal fungi. The genus Eucalyptus, particularly in the plant domain, establishes symbioses with arbuscular mycorrhizal fungi (AMF) and ectomycorrhizal fungi (ECMF). The influence of Eucalyptus species on AMF and soil quality indicators is not well understood. Our aim was to conduct a preliminary evaluation of the various responses of soil AMF communities and soil nutrient dynamics in the presence of Eucalyptus species with different degrees of drought tolerance. A field experiment was established containing six Eucalyptus species, E. brassiana, E. camaldulensis, E. citriodora, E. cloeziana, E. grandis, and E. urophylla, all of which were planted in large plots. Soil and root samples were taken when the plants were 1.7 and 2.2 years old. We found that Eucalyptus species with low (E. grandis and E. urophylla) and intermediate drought tolerance (E. citriodora and E. cloeziana) showed stronger correlations with the AMF community than Eucalyptus species with high drought tolerance (E. brassiana and E. camaldulensis). Differences were also found between Eucalyptus species for AMF spore numbers and root colonization percentages, which was most evident for E. urophylla. The microbiological attributes found to be most responsive to Eucalyptus species were soil enzyme activities, AMF spore numbers, root colonization percentages, and fungal abundance. Soil organic carbon, phosphorus, potassium, zinc, copper, and iron were the main chemical drivers related to the soil AMF community structure in the presence of E. brassiana.

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