La Trobe
2015 ZhangCJ ESPR22, 18824.pdf (1.23 MB)

Succulent species differ substantially in their tolerance and phytoextraction potential when grown in the presence of Cd, Cr, Cu, Mn, Ni, Pb, and Zn

Download (1.23 MB)
journal contribution
posted on 06.01.2021, 01:03 by C Zhang, Peter Sale, Gary Clark, W Liu, AI Doronila, SD Kolev, Caixian Tang
© 2015, Springer-Verlag Berlin Heidelberg. Plants for the phytoextraction of heavy metals should have the ability to accumulate high concentrations of such metals and exhibit multiple tolerance traits to cope with adverse conditions such as coexistence of multiple heavy metals, high salinity, and drought which are the characteristics of many contaminated soils. This study compared 14 succulent species for their phytoextraction potential of Cd, Cr, Cu, Mn, Ni, Pb, and Zn. There were species variations in metal tolerance and accumulation. Among the 14 succulent species, an Australian native halophyte Carpobrotus rossii exhibited the highest relative growth rate (20.6–26.6 mg plant−1 day−1) and highest tolerance index (78–93 %), whilst Sedum “Autumn Joy” had the lowest relative growth rate (8.3–13.6 mg plant−1 day−1), and Crassula multicava showed the lowest tolerance indices (<50 %). Carpobrotus rossii and Crassula helmsii showed higher potential for phytoextraction of these heavy metals than other species. These findings suggest that Carpobrotus rossii is a promising candidate for phytoextraction of multiple heavy metals, and the aquatic or semiterrestrial Crassula helmsii is suitable for phytoextraction of Cd and Zn from polluted waters or wetlands.

Funding

We thank the Royal Botanic Gardens Victoria for supplying Sedum species, Dr. Trevor Edwards for the identification of plant species, and Mr. Rob Evans for assistance in the experiment. We also thank two anonymous reviewers for constructive comments. This research was supported by the Australian Research Council Linkage Grant LP100100800.

History

Publication Date

01/01/2015

Journal

Environmental Science and Pollution Research

Volume

22

Issue

23

Pagination

15p. (p. 18824-18838)

Publisher

Springer Verlag (Germany)

ISSN

0944-1344

Rights Statement

The Author reserves all moral rights over the deposited text and must be credited if any re-use occurs. Documents deposited in OPAL are the Open Access versions of outputs published elsewhere. Changes resulting from the publishing process may therefore not be reflected in this document. The final published version may be obtained via the publisher’s DOI. Please note that additional copyright and access restrictions may apply to the published version.