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Arsenic response in roots of Eucalyptus spp.

Version 2 2024-06-03, 20:11
Version 1 2017-07-26, 13:31
conference contribution
posted on 2024-06-03, 20:11 authored by JT Sanchez-Palacios, Damien CallahanDamien Callahan, AJM Baker, IE Woodrow, AI Doronila, YD Wang, RN Collins
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.

History

Pagination

332-334

Location

Cairns, Qld.

Start date

2012-07-22

End date

2012-07-27

ISBN-13

9780415637633

Language

eng

Publication classification

E Conference publication, E1.1 Full written paper - refereed

Copyright notice

2012, Taylor & Francis Group

Editor/Contributor(s)

Ng JC, Noller BN, Naidu R, Bundschuh J, Bhattacharya P

Title of proceedings

As 2012 : Understanding the geological medical interface of arsenic : Proceedings of the 4th International Congress: Arsenic in the Environment

Event

International Society of Groundwater for Sustainable Development. Conference (4th : 2012 : Cairns, Qld.)

Publisher

CRC Press/Balkema

Place of publication

Leiden, The Netherlands

Series

International Society of Groundwater for Sustainable Development Conference

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