INVESTIGADORES
POLTI Marta Alejandra
artículos
Título:
Soil chromium bioremediation: Synergic activity of actinobacteria and plants
Autor/es:
POLTI, MARTA ALEJANDRA; ATJIÁN, MARIANA CRISTINA; AMOROSO, MARÍA JULIA; ABATE; CARLOS MAURICIO
Revista:
INTERNATIONAL BIODETERIORATION & BIODEGRADATION
Editorial:
ELSEVIER SCI LTD
Referencias:
Año: 2011 vol. 65 p. 1175 - 1181
ISSN:
0964-8305
Resumen:
The aim of this work was to evaluate a strategy to reduce the
bioavailable chromium fraction in soil, using a Cr(VI) resistant
microorganism, Streptomyces sp. MC1, under non sterile conditions, with
maize plants as bioindicator and/or bioremediator.Soil samples were
contaminated with 100, 200 and 400 mg kg-1 of Cr(VI) or Cr(III).
Bioavailable chromium (35%) was only detected in samples with Cr(VI).
Soil samples with Cr(VI) 200 mg kg-1 were inoculated with Streptomyces
sp. MC1, and bioavailable chromium decreased up to 73%.Zea mays
seedlings were planted in soil samples contaminated with chromium.
Plantlets accumulated chromium mainly as Cr(III), and biomass decreased
up to 88%. Streptomyces sp. MC1 was inoculated in soil samples
contaminated with 200 mg kg-1 of Cr(VI) and Z. mays seedlings were
planted.Streptomyces sp. MC1 caused Z. mays biomass increase (57%),
chromium accumulation and bioavailable chromium decreased up to 46% and
96%, respectively.This work constitutes the first contribution of
cooperative action between actinobacteria and Z. mays in the
bioremediation of Cr(VI) contaminated soil. The large removal capacity
of bioavailable chromium by Streptomyces sp. MC1 and Z. mays infers that
they could be successfully applied together in bioremediationof soils contaminated with Cr(VI).