Uptake and transformation of phenol and chlorophenols by hairy root cultures of Daucus carota, Ipomoea batatas and Solanum aviculare
Hairy root cultures of Daucus carota L., Ipomoea batatas L. and Solanum aviculare Forst were investigated for their susceptibility to the highly toxic pollutants phenol and chlorophenols and for the involvement of inherent peroxidases in the removal of phenols from liquid media. Roots of D. carota g...
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Published in: | Chemosphere (Oxford) Vol. 63; no. 4; pp. 642 - 651 |
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Main Authors: | , , , |
Format: | Journal Article |
Language: | English |
Published: |
Oxford
Elsevier Ltd
01-04-2006
Elsevier |
Subjects: | |
Online Access: | Get full text |
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Summary: | Hairy root cultures of
Daucus carota L.,
Ipomoea batatas L. and
Solanum aviculare Forst were investigated for their susceptibility to the highly toxic pollutants phenol and chlorophenols and for the involvement of inherent peroxidases in the removal of phenols from liquid media. Roots of
D. carota grew normally in medium containing 1000
μmol
l
−1 of phenol, whilst normal growth of roots of
I. batatas and
S. aviculare was only possible at levels up to 500
μmol
l
−1. In the presence of chlorophenols, normal root growth was possible only in concentrations not exceeding 50
μmol
l
−1, except for
I. batatas which was severely affected at all concentrations. Despite the reduction in biomass, the growth of
S. aviculare cultures was sustained in medium containing up to 2000
μmol
l
−1 of phenol or 2-chlorophenol, and up to 500
μmol
l
−1 of 2,6-dichlorophenol. The amounts of phenol removed by the roots within 72
h of treatment were 72.7%, 90.7% and 98.6% of the initial concentration for
D. carota,
I. batatas and
S. aviculare, respectively. For the removal of 2,6-dichlorophenol the values were, respectively, 83.0%, 57.7% and 73.1%. Phenols labelled with
14C were absorbed by the root tissues and condensed with highly polar cellular substances as well as being incorporated into the cell walls or membranes. The results suggest that
S. aviculare, an ornamental plant, would be best suited for remediation trials under field conditions. |
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Bibliography: | http://dx.doi.org/10.1016/j.chemosphere.2005.08.005 ObjectType-Article-2 SourceType-Scholarly Journals-1 ObjectType-Feature-1 content type line 23 |
ISSN: | 0045-6535 1879-1298 |
DOI: | 10.1016/j.chemosphere.2005.08.005 |