Your browser doesn't support javascript.
loading
Salinity induced effects on the growth rates and mycelia composition of basidiomycete and zygomycete fungi.
Venâncio, C; Pereira, R; Freitas, A C; Rocha-Santos, T A P; da Costa, J P; Duarte, A C; Lopes, I.
Afiliación
  • Venâncio C; Department of Biology & CESAM, Campus de Santiago, University of Aveiro, 3810-193 Aveiro, Portugal. Electronic address: a32884@ua.pt.
  • Pereira R; Department of Biology, Faculty of Sciences of the University of Porto, Rua do Campo Alegre s/n, 4169-007 Porto, Portugal.
  • Freitas AC; Universidade Católica Portuguesa, CBQF - Centro de Biotecnologia e Química Fina, Rua Arquiteto Lobão Vital, Apartado 2511, 45202-401 Porto, Portugal.
  • Rocha-Santos TAP; Department of Chemistry & CESAM, Campus de Santiago, University of Aveiro, 3810-193 Aveiro, Portugal.
  • da Costa JP; Department of Chemistry & CESAM, Campus de Santiago, University of Aveiro, 3810-193 Aveiro, Portugal.
  • Duarte AC; Department of Chemistry & CESAM, Campus de Santiago, University of Aveiro, 3810-193 Aveiro, Portugal.
  • Lopes I; Department of Biology & CESAM, Campus de Santiago, University of Aveiro, 3810-193 Aveiro, Portugal.
Environ Pollut ; 231(Pt 2): 1633-1641, 2017 Dec.
Article en En | MEDLINE | ID: mdl-28964607
Soil salinization, as the combination of primary and secondary events, can adversely affect organisms inhabiting this compartment. In the present study, the effects of increased salinity were assessed in four species of terrestrial fungi: Lentinus sajor caju, Phanerochaete chrysosporium, Rhizopus oryzae and Trametes versicolor. The mycelial growth and biochemical composition of the four fungi were determined under three exposure scenarios: 1) exposure to serial dilutions of natural seawater (SW), 2) exposure to serial concentrations of NaCl (potential surrogate of SW); and 3) exposure to serial concentrations of NaCl after a period of pre-exposure to low levels of NaCl. The toxicity of NaCl was slightly higher than that of SW, for all fungi species: the conductivities causing 50% of growth inhibition (EC50) were within 14.9 and 22.0 mScm-1 for NaCl and within 20.2 and 34.1 mScm-1 for SW. Phanerochaete chrysosporium showed to be the less sensitive species, both for NaCl and SW. Exposure to NaCl caused changes in the biochemical composition of fungi, mainly increasing the production of polysaccharides. When fungi were exposed to SW this pattern of biochemical response was not observed. Fungi pre-exposed to low levels of salinity presented higher EC50 than fungi non-pre-exposed, though 95% confidence limits overlapped, with the exception of P. chrysosporium. Pre-exposure to low levels of NaCl also induced changes in the biochemical composition of the mycelia of L. sajor caju and R. oryzae, relatively to the respective control. These results suggest that some terrestrial fungi may acquire an increased tolerance to NaCl after being pre-exposed to low levels of this salt, thus, suggesting their capacity to persist in environments that will undergo salinization. Furthermore, NaCl could be used as a protective surrogate of SW to derive safe salinity levels for soils, since it induced toxicity similar or higher than that of SW.
Asunto(s)
Palabras clave
Texto completo
Añadir a Mi BVS
Imprimir
XML
PubMed Links
Buscar en Google

Texto completo: 1 Colección: 01-internacional Base de datos: MEDLINE Asunto principal: Rhizopus / Suelo / Microbiología del Suelo / Basidiomycota / Micelio Idioma: En Revista: Environ Pollut Asunto de la revista: SAUDE AMBIENTAL Año: 2017 Tipo del documento: Article Pais de publicación: Reino Unido
Texto completo
Añadir a Mi BVS
Imprimir
XML
PubMed Links
Buscar en Google

Texto completo: 1 Colección: 01-internacional Base de datos: MEDLINE Asunto principal: Rhizopus / Suelo / Microbiología del Suelo / Basidiomycota / Micelio Idioma: En Revista: Environ Pollut Asunto de la revista: SAUDE AMBIENTAL Año: 2017 Tipo del documento: Article Pais de publicación: Reino Unido