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Publication Type J
Authors Newete, SW; Allem, SM; Venter, N; Byrne, MJ
Author Full Name Newete, Solomon Wakshom; Allem, Stawm Megan; Venter, Nic; Byrne, Marcus John
Title Tamarix efficiency in salt excretion and physiological tolerance to salt-induced stress in South Africa
Source INTERNATIONAL JOURNAL OF PHYTOREMEDIATION
Language English
Document Type Article
Author Keywords Excretion; genotypes; heavy metals; phytoremediation; salt glands; Tamarix
Keywords Plus CHLOROPHYLL FLUORESCENCE; SALINITY TOLERANCE; TAMARICACEAE; HALOPHYTE; GROWTH; PHYTOREMEDIATION; PHOTOSYNTHESIS; ACCUMULATION; TRANSPORT; RESPONSES
Abstract This study, investigated the salt excretion efficiency and the level of the physiological response to salt-induced stresses between the native and exotic Tamarix species as well as their hybrids (Tamarix chinensis x Tamarix ramosissima and Tamarix chinensis x Tamarix usneoides). Ten potted plants from each of the five taxa were exposed to salt at a concentration of 3% (w/w) (180 mM) for 3 weeks. Measurements of electro-conductivity (EC), physiological parameters such as stomatal conductance, chlorophyll fluorescence, and water pressure and plant growth were taken from salt-treated and control plants. The EC in the exotic T. chinensis significantly increased by >30% compared with all other Tamarix taxa, suggesting that it is the most effective taxon for phytoremediation. Although there was no significant difference in plant growth between T. chinensis and T. usneoides, they both showed a significantly greater plant growth than the other taxa. However, the plant physiological parameters indicated that T. usneoides was less stressed by the salt exposure than the T. chinensis and the others. Thus, considering the T. usneoides greater tolerance to salt-induced and/water stresses and the strict environmental regulations of planting exotic Tamarix, the native Tamarix remains the preferred plant of choice for phytoremediation in South Africa.
Author Address [Newete, Solomon Wakshom] ARC ISCW, Geoinformat Sci Devis, 600 Belvedere St, ZA-0001 Pretoria, South Africa; [Newete, Solomon Wakshom; Allem, Stawm Megan; Venter, Nic; Byrne, Marcus John] Univ Witwatersrand, Sch Anim Plant & Environm Sci, Johannesburg, South Africa; [Byrne, Marcus John] DST NRF Ctr Excellence Invas Biol, Johannesburg, South Africa
Reprint Address Newete, SW (corresponding author), ARC ISCW, Geoinformat Sci Devis, 600 Belvedere St, ZA-0001 Pretoria, South Africa.
E-mail Address solomonnewete@gmail.com
ResearcherID Number Byrne, Marcus/AAF-9789-2021
ORCID Number newete, solomon/0000-0001-5245-8732; Venter, Nic/0000-0003-3509-2331
Funding Agency and Grant Number Wits School of Governance (WSG) through the Life in City project-Grant [2858]
Funding Text This work was supported by Wits School of Governance (WSG) through the Life in City project-Grant [2858].
Times Cited 7
Total Times Cited Count (WoS, BCI, and CSCD) 7
Publisher TAYLOR & FRANCIS INC
Publisher City PHILADELPHIA
Publisher Address 530 WALNUT STREET, STE 850, PHILADELPHIA, PA 19106 USA
ISSN 1522-6514
29-Character Source Abbreviation INT J PHYTOREMEDIAT
ISO Source Abbreviation Int. J. Phytoremediat.
Publication Date JAN 2
Year Published 2020
Volume 22
Issue 1
Special Issue SI
Beginning Page 3
Ending Page 9
Digital Object Identifier (DOI) 10.1080/15226514.2019.1633997
Page Count 7
Web of Science Category Environmental Sciences
Subject Category Environmental Sciences & Ecology
Document Delivery Number JU3KH
Unique Article Identifier WOS:000501574400001
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