Arsenic response in roots of Eucalyptus spp.

J. T. Sanchez-Palacios, D. Callahan, Alan J.M. Baker, I. E. Woodrow, A. I. Doronila, Y. D. Wang, R. N. Collins

Research output: A Conference proceeding or a Chapter in BookConference contribution

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 languageEnglish
Title of host publicationUnderstanding the Geological and Medical Interface of Arsenic, As 2012 - 4th International Congress
Subtitle of host publicationArsenic in the Environment
EditorsJ.C. Ng, B.N. Noller, R. Naidu, J. Bundschuh, P. Bhattacharya
Place of PublicationLeiden, The Netherlands
PublisherCRC Press/Balkema
Pages332-334
Number of pages3
Edition1st
ISBN (Electronic)9780203078808
ISBN (Print)9780415637633
Publication statusPublished - 6 Jul 2012
Event4th International Congress on Arsenic in the Environment, As 2012 - Cairns, QLD, Australia
Duration: 22 Jul 201227 Jul 2012

Publication series

NameArsenic in the Environment - Proceedings
PublisherCRC Press
NumberAS 2012
ISSN (Print)2154-6568

Conference

Conference4th International Congress on Arsenic in the Environment, As 2012
CountryAustralia
CityCairns, QLD
Period22/07/1227/07/12

    Fingerprint

Cite this

Sanchez-Palacios, J. T., Callahan, D., Baker, A. J. M., Woodrow, I. E., Doronila, A. I., Wang, Y. D., & Collins, R. N. (2012). Arsenic response in roots of Eucalyptus spp. In J. C. Ng, B. N. Noller, R. Naidu, J. Bundschuh, & P. Bhattacharya (Eds.), Understanding the Geological and Medical Interface of Arsenic, As 2012 - 4th International Congress: Arsenic in the Environment (1st ed., pp. 332-334). (Arsenic in the Environment - Proceedings; No. AS 2012). Leiden, The Netherlands: CRC Press/Balkema.