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Endophytic microorganisms: identification of genes related to microbial interactions

Grant number: 12/24217-6
Support type:Regular Research Grants
Duration: August 01, 2013 - November 30, 2015
Field of knowledge:Biological Sciences - Microbiology
Principal Investigator:Welington Luiz de Araújo
Grantee:Welington Luiz de Araújo
Home Institution: Instituto de Ciências Biomédicas (ICB). Universidade de São Paulo (USP). São Paulo , SP, Brazil

Abstract

In recent years, the interest in endophytic microorganisms as an important source of new species and potential use in biological control and production of metabolites with different biological activities has increasing. Despite the discovery of new compounds from these micro-organisms, there is a gap between the production os certains compounds and the knowledge of the biosynthetic pathways, also role of these compounds in the endophytes-plant interaction is stil understood. In previous projects a collection of endphytic microorganisms was organized (Proc. FAPESP 2003/14143-3) and genes associated with the synthesis of secondary metabolites (Procs. FAPESP 2010/08286-2; 2008/52407-9), interaction with the host plant (Proc. FAPESP 2010/07594-5) and biological control (Procs. FAPESP 2008/52407-9) were identified in the fungus Epicoccum nigrum P16 and bacteria Burkholderia cenocepacia TC3.4.2R3 and Methylobacterium mesophilicum SR1.6/6. In these projects, the genomes of E. nigrum P16 and M. mesophilicum SR1.6/6 were sequenced and have been assembled and annotated, allowing the studies of genes and possible metabolic pathways associated with endophytes-plant interaction. The strains B. cenocepacia TC3.4.2R3 and E. nigrum P16 were also used to generate a mutant library with approximately 1200 and 2100 mutans, respectively, which has been used for the identification of genes associated with microbial interactions. Therefore, the aims of the present project are i) to evaluate the transcriptome (RNA-seq) of E. nigrum P16, B. cenocepacia TC3.4.2R3 and M. mesophilicum SR1.6/6 in different growth conditions; ii) determine the genes expressed at different stages of microbial interaction; iii) confirm the association of genes/operons with the synthesis of antimicrobial compounds and colonization of the host plant by gene knockout/complementation; iv) cloning and express genes that encode peptides involved in the control of pathogens; v) identify new compounds produced by wild strain and absent B. cenocepacia and E. nigrum mutants. Thus, this project will contribute to a better understanding of many biological processes associated to microbial interaction, mainly related to plant colonization, biological control of phytopathogens and synthesis of bioactive molecules by endophytic microorganisms, allowing not only the development of biological control strategies based on endophytes, but also the organization of a gene library that may be used in many biotechnological applications, such as synthesis of biomolecules, generation of recombinant microorganisms and genetically modified plants. (AU)

Scientific publications (8)
(References retrieved automatically from Web of Science and SciELO through information on FAPESP grants and their corresponding numbers as mentioned in the publications by the authors)
ROMANO DE OLIVEIRA GONCALVES, PRISCILA JANE; HUME, CARMEN C. DENMAN; FERREIRA, ALMIR JOSE; TSUI, SARINA; BROCCHI, MARCELO; WREN, BRENDAN W.; ARAUJO, WELINGTON LUIZ. Environmental interactions are regulated by temperature in Burkholderia seminalis TC3.4.2R3. SCIENTIFIC REPORTS, v. 9, APR 2 2019. Web of Science Citations: 0.
BRAGA, RAISSA MESQUITA; DOURADO, MANUELLA NOBREGA; ARAUJO, WELINGTON LUIZ. Microbial interactions: ecology in a molecular perspective. Brazilian Journal of Microbiology, v. 47, n. 1, p. 86-98, DEC 2016. Web of Science Citations: 26.
AZEVEDO, JOAO LUCIO; ARAUJO, WELINGTON LUIZ; LACAVA, PAULO TEIXEIRA. The diversity of citrus endophytic bacteria and their interactions with Xylella fastidiosa and host plants. GENETICS AND MOLECULAR BIOLOGY, v. 39, n. 4, p. 476-491, OCT-DEC 2016. Web of Science Citations: 9.
ARAUJO, WELINGTON L.; CREASON, ALLISON L.; MANO, EMY T.; CAMARGO-NEVES, ALINE A.; MINAMI, SONIA N.; CHANG, JEFF H.; LOPER, JOYCE E. Genome Sequencing and Transposon Mutagenesis of Burkholderia seminalis TC3.4.2R3 Identify Genes Contributing to Suppression of Orchid Necrosis Caused by B-gladioli. MOLECULAR PLANT-MICROBE INTERACTIONS, v. 29, n. 6, p. 435-446, JUN 2016. Web of Science Citations: 6.
RAÍSSA MESQUITA BRAGA; MANUELLA NÓBREGA DOURADO; WELINGTON LUIZ ARAÚJO. Microbial interactions: ecology in a molecular perspective. Brazilian Journal of Microbiology, v. 47, p. 86-98, Dez. 2016.
DOURADO, MANUELLA NOBREGA; SANTOS, DAIENE SOUZA; NUNES, LUIZ ROBERTO; BATISTA DA COSTA DE OLIVEIRA, REGINA LUCIA; DE OLIVEIRA, MARCUS VINICIUS; ARAUJO, WELINGTON LUIZ. Differential gene expression in Xylella fastidiosa 9a5c during co-cultivation with the endophytic bacterium Methylobacterium mesophilicum SR1.6/6. JOURNAL OF BASIC MICROBIOLOGY, v. 55, n. 12, p. 1357-1366, DEC 2015. Web of Science Citations: 4.
ARAUJO, WELINGTON LUIZ; SANTOS, DAIENE SOUZA; DINI-ANDREOTE, FRANCISCO; SALGUEIRO-LONDONO, JENNIFER KATHERINE; CAMARGO-NEVES, ALINE APARECIDA; ANDREOTE, FERNANDO DINI; DOURADO, MANUELLA NOBREGA. Genes related to antioxidant metabolism are involved in Methylobacterium mesophilicum-soybean interaction. ANTONIE VAN LEEUWENHOEK INTERNATIONAL JOURNAL OF GENERAL AND MOLECULAR MICROBIOLOGY, v. 108, n. 4, p. 951-963, OCT 2015. Web of Science Citations: 4.
DOURADO, MANUELLA NOBREGA; CAMARGO NEVES, ALINE APARECIDA; SANTOS, DAIENE SOUZA; ARAUJO, WELINGTON LUIZ. Biotechnological and Agronomic Potential of Endophytic Pink-Pigmented Methylotrophic Methylobacterium spp.. BIOMED RESEARCH INTERNATIONAL, 2015. Web of Science Citations: 17.

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