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Availability of phosphorus and the impact on the root microbiome of several eucalyptus species

Grant number: 19/02397-1
Support type:Scholarships in Brazil - Doctorate
Effective date (Start): May 01, 2019
Effective date (End): April 30, 2022
Field of knowledge:Biological Sciences - Genetics
Principal Investigator:Paulo Mazzafera
Grantee:Laura Migliorini de Araujo
Home Institution: Instituto de Biologia (IB). Universidade Estadual de Campinas (UNICAMP). Campinas , SP, Brazil
Associated research grant:16/25498-0 - Phosphorus use efficiency in Eucalyptus and the physiological and genetic mechanisms involved, AP.TEM

Abstract

Phosphorous (P) is a macronutrient essential for plant growth and is present in different molecules that have major biological importance. P is a non-renewable element in nature, obtained from phosphorous rocks. Thus, P used as a fertilizer can lead to an extinction of its natural fonts. Most of P present in soils is insoluble and not available for plants uptake hence being necessary different mechanisms for its solubilization. Plants have developed genetic strategies for better P uptake however, these strategies are genotype and species dependent. In Brazil, the eucalyptus tree production has a major impact on the economy and studies have shown that this plant demands great amounts of P with variations among different species. Besides plant strategies developed to obtain non-available P from soils, microbial (bacteria and fungi) species present in the soil and the surface of the roots are capable of solubilize and provide P nutrient to plants and thus, enhancing plant growth under P limitation. This goal of this study is to assess the microbiome (bacteria and fungi) assembly in the root compartment and rhizosphere trough metagenomics and metatranscriptomics approaches of five species of Eucalyptus, each one presenting a characteristic P use efficiency, cultivated in soils under different availability of P. (AU)