About

Professor Luiz Roesch's research group uses molecular analysis to test fundamental hypotheses in microbial ecology.

Research topics

• Biology
• Genetics
• Medicine
• Computational biology
• Dentistry
• Microbiology
• Ecology
• Internal medicine
• Bioinformatics
• Agronomy
• Environmental health
• Immunology

Selected publications

• Saliva microbiome, dietary, and genetic markers are associated with suicidal ideation in university students

  Scientific Reports · 2022 · 35 citations

  • Genetics
  • Immunology
  • Biology

  Here, salivary microbiota and major histocompatibility complex (MHC) human leukocyte antigen (HLA) alleles were compared between 47 (12.6%) young adults with recent suicidal ideation (SI) and 325 (87.4%) controls without recent SI. Several bacterial taxa were correlated with SI after controlling for sleep issues, diet, and genetics. Four MHC class II alleles were protective for SI including DRB1*04, which was absent in every subject with SI while present in 21.7% of controls. Increased incidence of SI was observed with four other MHC class II alleles and two MHC class I alleles. Associations between these HLA alleles and salivary bacteria were also identified. Furthermore, rs10437629, previously associated with attempted suicide, was correlated here with SI and the absence of Alloprevotella rava, a producer of an organic acid known to promote brain energy homeostasis. Hence, microbial-genetic associations may be important players in the diathesis-stress model for suicidal behaviors.

  PublisherOA PDFDOI

• A long‐term no‐tillage system can increase enzymatic activity and maintain bacterial richness in paddy fields

  Land Degradation and Development · 2021 · 47 citations

  • Agronomy
  • Biology
  • Ecology

  Abstract Soil management systems cause many changes in the microenvironment that directly affect activity and diversity of microorganisms. In lowlands, there is a gap in relation to the adoption of no‐tillage (zero‐tillage) and the impact it has on soil under cultivation of irrigated rice. This study, an in‐field experiment, evaluated the microbial enzymatic activity and diversity in an Entisol cultivated with rice under different managements for 22 years. The experiment started in the 1994/95 growing season, and the treatments were no‐tillage, conventional, and pregerminated management systems. After 22 years, the data obtained on most of the evaluation dates indicated that no‐tillage increased microbial biomass carbon (+45%), microbial biomass nitrogen (+54%), and basal respiration (+54%). No‐tillage compared to management under soil tillage (pregerminated and conventional tillage) increased the activity of β‐glucosidase (+43%), acid phosphatase (+68%), diacetate fluorescein (+34%), and urease (+96%). The enzyme activity was correlated with the soil organic carbon content and particulate fraction. Despite the relatively high enzyme activity with no‐tillage, bacterial richness was maintained in this soil management system. The Proteobacteria phylum has a greater abundance in the NT (43.2%) in relation to the CT (32.3%). Bacteroidetes phylum has a lower abundance in the NT (10.0%) in relation to the CT (15.2%). The Verrucomicrobia phylum has a greater abundance in NT (8.9%) in relation to CT (4.9%). The results suggest that no‐tillage is an important management tool in the recovery of irrigated rice areas whose soil has undergone microbiological degradation.

  DOI

• Association of Candida albicans and Cbp+ Streptococcus mutans with early childhood caries recurrence

  Scientific Reports · 2021 · 78 citations

  • Medicine
  • Microbiology
  • Dentistry

  S. mutans and C. albicans are intimately associated with caries recurrence, contributing to the establishment of recalcitrant biofilms.

  DOI

• Depression phenotype identified by using single nucleotide exact amplicon sequence variants of the human gut microbiome

  Molecular Psychiatry · 2020 · 69 citations

  • Biology
  • Computational biology
  • Genetics
  DOI

Frequent coauthors

• Victor Satler Pylro

  Universidade Federal de Lavras

  35 shared

• Eric W. Triplett

  University of Florida

  34 shared

• Qian Li

  Soochow University

  30 shared

• Flávio Anastácio de Oliveira Camargo

  30 shared

• Andrea Corso

  17 shared

• Priscila Thiago Dobbler

  Czech Academy of Sciences, Institute of Microbiology

  17 shared

• Rita C. Silveira

  Hospital de Clínicas de Porto Alegre

  17 shared

• Daniel Morais

  16 shared

Education

• PhD Soil Microbiology and Biochemistry, Department of Soil Science

  Universidade Federal do Rio Grande do Sul

  2007

• MS Soil microbiology and Biochemistry, Department of Soil Science

  Universidade Federal do Rio Grande do Sul

  2003

Similar researchers at University of Florida

• Steven T DeKoskyh-162
• Matthew Farrerh-133
• George Christouh-133
• Mark A Atkinsonh-129
• Christiaan Leeuwenburghh-125