Assessment of planctomycetes cell viability after pollutants exposure

• Tipo: Artigo em Revista Científica Internacional
• Data: 2014

Autores

flores, c (Autor) Outra; catita, jam (Autor) Outra; lage, om (Autor) FCUP

Revista

Título: Antonie van Leeuwenhoek, International Journal of General and Molecular Microbiology

Vol. 106

Páginas: 399-411

ISSN: 0003-6072

Editora: Springer Nature

Indexação

ISI Web of Knowledge - 8 Citações

Scopus - 9 Citações

Classificação Científica

FOS: Ciências exactas e naturais > Ciências biológicas

Outras Informações

ID Authenticus: P-009-MPS

DOI: 10.1007/s10482-014-0206-4

Abstract (EN): In this study, the growth of six different planctomycetes, a particular ubiquitous bacterial phylum, was assessed after exposure to pollutants. In addition and for comparative purposes, Pseudomonas putida, Escherichia coli and Vibrio anguillarum were tested. Each microorganism was exposed to several concentrations of 21 different pollutants. After exposure, bacteria were cultivated using the drop plate method. In general, the strains exhibited a great variation of sensitivity to pollutants in the order: V. anguillarum > planctomycetes > P. putida > E. coli. E. coli showed resistance to all pollutants tested, with the exception of phenol and sodium azide. Copper, Ridomil(A (R)) (fungicide), hydrazine and phenol were the most toxic pollutants. Planctomycetes were resistant to extremely high concentrations of nitrate, nitrite and ammonium but they were the only bacteria sensitive to Previcur N-A (R) (fungicide). Sodium azide affected the growth on plates of E. coli, P. putida and V. anguillarum, but not of planctomycetes. However, this compound affected planctomycetes cell respiration but with less impact than in the aforementioned bacteria. Our results provide evidence for a diverse response of bacteria towards pollutants, which may influence the structuring of microbial communities in ecosystems under stress, and provide new insights on the ecophysiology of planctomycetes.

Idioma: Inglês

Tipo (Avaliação Docente): Científica

Nº de páginas: 13