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

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Lopes, Bruna Andreia de Bacco ; Silva, Antonio Marcos Miranda ; Santana, Maiele Cintra ; Feiler, Henrique Petry ; Pereira, Arthur Prudencio de Araujo ; Teixeira, Marcos Ferreira ; de Araujo, Victor Lucas Vieira Prudencio ; de Avila, Patricia Andressa ; Goncalves, Jose Leonardo de Moraes ; Staunton, Siobhan ; Cardoso, Elke Jurandy Bran Nogueira

• Document type: Journal article
• Source: FRONTIERS IN FUNGAL BIOLOGY; v. 3, p. 13-pg., 2022-06-20.

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. (AU)

• FAPESP's process: 16/18944-3 - Climatic changes and energetic efficiency in agriculture: focusing on hydric stress, organic management and soil biology
• Grantee: Elke Jurandy Bran Nogueira Cardoso
• Support Opportunities: Research Program on Global Climate Change - Thematic Grants
• FAPESP's process: 18/12665-0 - Relationship between mycorrhizal fungi and eucalyptus species with different levels of water stress tolerance
• Grantee: Bruna Andréia de Bacco Lopes
• Support Opportunities: Scholarships abroad - Research Internship - Master's degree
• FAPESP's process: 18/20553-8 - Residues removal in eucalyptus forests: influence on the fungi community and phosphorus cycling in soil
• Grantee: Maiele Cintra Santana
• Support Opportunities: Scholarships in Brazil - Doctorate
• FAPESP's process: 17/16608-9 - Relationship between mycorrhizal fungi and eucalyptus species with different levels of water stress tolerance
• Grantee: Bruna Andréia de Bacco Lopes
• Support Opportunities: Scholarships in Brazil - Master
• FAPESP's process: 18/20607-0 - Does the removal of forest residues have an impact on the soil and plant microbiome related to C, N and P cycling? A metagenomic view
• Grantee: Elke Jurandy Bran Nogueira Cardoso
• Support Opportunities: Regular Research Grants
• FAPESP's process: 19/13436-8 - Mitigation of water stress in maize (Zea mays L.) after arbuscular mycorrhizal fungi and growth promoting rhizobacteria inoculation
• Grantee: Antonio Marcos Miranda Silva
• Support Opportunities: Scholarships in Brazil - Doctorate