The impact of soil chloride concentration and salt type on the excretions of four recretohalophytes with different excretion mechanisms

International Journal of Phytoremediation
Amélie A S LitalienBarbara A Zeeb

Abstract

Four natives Canadian recretohalophytic species: Atriplex canescens, Armeria maritima, Spartina pectinata, and Distichlis spicata were examined to determine their relative uptake and excretion of chloride in the context of phytoremediation. Adult plants were grown in soils contaminated with either sodium chloride or potassium chloride at various concentrations, then manually washed to collect the excreted salts. Atriplex canescens which has salt bladders, was found to have negligible excretions, suggesting that these structures release minimal amounts of salt onto the leaf's surface. Chloride excretions of S. pectinata and D. spicata increased with higher soil chloride concentrations. A. maritima showed minimal excretion until a threshold soil salinity was reached. This species shifted from a reliance on internal sequestration to secretion at higher soil salinity. The salt used in the media did not impact these trends, but D. spicata excreted significantly more chloride under sodium chloride conditions. While all four species studied were able to translocate significant amount of salt to their shoots, only S. pectinata, D. spicata, and A. maritima are suitable candidates for remediation by haloconduction. Among these, A. mariti...Continue Reading

References

Mar 19, 2014·Trends in Plant Science·Ulrich DeinleinJulian I Schroeder
Apr 10, 2015·Environmental Science and Pollution Research International·João M JesusMaria-Teresa Borges
Jun 27, 2019·The Science of the Total Environment·Kassandra B M YunBarbara A Zeeb
Dec 1, 2019·The Science of the Total Environment·Amélie Litalien, Barbara Zeeb

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BETA
salt extraction

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R Studio

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