Abstract
The use of deep-rooted woody plants offers a means of remediating and stabilizing Arsenic (As)-rich contaminated soil and tailings often associated with mining activities. However, precisely how these plants respond to arsenic is not well understood. Studies on the responses of eucalypts to high levels of arsenic show variation in both performance and As-uptake. For example, in studies on sugar gum (Eucalyptus cladocalyx) relative growth rate was reduced by 50% and accumulated 99% of As in the roots, ranging from 111 to 746 %mu;g/g d.w. Tissue As was found to be in a reduced form, As III, coordinated to PhytoChelatins (PCs), largely as AsIII-PC 3. Oxidized PC 2 was also present ranging from 143 to 347 %mu;g/g f.w. Cellular localization studies further showed As-complexation to occur in the root endodermis with undetectable amounts in the vascular bundles. These results suggest that arsenic complexes play an important role in As-tolerance, and that selective breeding of eucalypts with enhanced-PC synthesis may help in the improvement of As-mine-site stabilization.
| Original language | English |
|---|---|
| Title of host publication | Understanding the Geological and Medical Interface of Arsenic, As 2012 - 4th International Congress |
| Subtitle of host publication | Arsenic in the Environment |
| Editors | J.C. Ng, B.N. Noller, R. Naidu, J. Bundschuh, P. Bhattacharya |
| Place of Publication | Leiden, The Netherlands |
| Publisher | CRC Press/Balkema |
| Pages | 332-334 |
| Number of pages | 3 |
| Edition | 1st |
| ISBN (Electronic) | 9780203078808 |
| ISBN (Print) | 9780415637633 |
| Publication status | Published - 6 Jul 2012 |
| Event | 4th International Congress on Arsenic in the Environment, As 2012 - Cairns, QLD, Australia Duration: 22 Jul 2012 → 27 Jul 2012 |
Publication series
| Name | Arsenic in the Environment - Proceedings |
|---|---|
| Publisher | CRC Press |
| Number | AS 2012 |
| ISSN (Print) | 2154-6568 |
Conference
| Conference | 4th International Congress on Arsenic in the Environment, As 2012 |
|---|---|
| Country | Australia |
| City | Cairns, QLD |
| Period | 22/07/12 → 27/07/12 |
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Arsenic response in roots of Eucalyptus spp. / Sanchez-Palacios, J. T.; Callahan, D.; Baker, Alan J.M.; Woodrow, I. E.; Doronila, A. I.; Wang, Y. D.; Collins, R. N.
Understanding the Geological and Medical Interface of Arsenic, As 2012 - 4th International Congress: Arsenic in the Environment. ed. / J.C. Ng; B.N. Noller; R. Naidu; J. Bundschuh; P. Bhattacharya. 1st. ed. Leiden, The Netherlands : CRC Press/Balkema, 2012. p. 332-334 (Arsenic in the Environment - Proceedings; No. AS 2012).Research output: A Conference proceeding or a Chapter in Book › Conference contribution
TY - GEN
T1 - Arsenic response in roots of Eucalyptus spp.
AU - Sanchez-Palacios, J. T.
AU - Callahan, D.
AU - Baker, Alan J.M.
AU - Woodrow, I. E.
AU - Doronila, A. I.
AU - Wang, Y. D.
AU - Collins, R. N.
PY - 2012/7/6
Y1 - 2012/7/6
N2 - The use of deep-rooted woody plants offers a means of remediating and stabilizing Arsenic (As)-rich contaminated soil and tailings often associated with mining activities. However, precisely how these plants respond to arsenic is not well understood. Studies on the responses of eucalypts to high levels of arsenic show variation in both performance and As-uptake. For example, in studies on sugar gum (Eucalyptus cladocalyx) relative growth rate was reduced by 50% and accumulated 99% of As in the roots, ranging from 111 to 746 %mu;g/g d.w. Tissue As was found to be in a reduced form, As III, coordinated to PhytoChelatins (PCs), largely as AsIII-PC 3. Oxidized PC 2 was also present ranging from 143 to 347 %mu;g/g f.w. Cellular localization studies further showed As-complexation to occur in the root endodermis with undetectable amounts in the vascular bundles. These results suggest that arsenic complexes play an important role in As-tolerance, and that selective breeding of eucalypts with enhanced-PC synthesis may help in the improvement of As-mine-site stabilization.
AB - The use of deep-rooted woody plants offers a means of remediating and stabilizing Arsenic (As)-rich contaminated soil and tailings often associated with mining activities. However, precisely how these plants respond to arsenic is not well understood. Studies on the responses of eucalypts to high levels of arsenic show variation in both performance and As-uptake. For example, in studies on sugar gum (Eucalyptus cladocalyx) relative growth rate was reduced by 50% and accumulated 99% of As in the roots, ranging from 111 to 746 %mu;g/g d.w. Tissue As was found to be in a reduced form, As III, coordinated to PhytoChelatins (PCs), largely as AsIII-PC 3. Oxidized PC 2 was also present ranging from 143 to 347 %mu;g/g f.w. Cellular localization studies further showed As-complexation to occur in the root endodermis with undetectable amounts in the vascular bundles. These results suggest that arsenic complexes play an important role in As-tolerance, and that selective breeding of eucalypts with enhanced-PC synthesis may help in the improvement of As-mine-site stabilization.
UR - http://www.scopus.com/inward/record.url?scp=84864877097&partnerID=8YFLogxK
M3 - Conference contribution
SN - 9780415637633
T3 - Arsenic in the Environment - Proceedings
SP - 332
EP - 334
BT - Understanding the Geological and Medical Interface of Arsenic, As 2012 - 4th International Congress
A2 - Ng, J.C.
A2 - Noller, B.N.
A2 - Naidu, R.
A2 - Bundschuh, J.
A2 - Bhattacharya, P.
PB - CRC Press/Balkema
CY - Leiden, The Netherlands
ER -