Abstract
Plant hormones can improve the phytoremediation capabilities of heavy metal hyperaccumulator plants. In this study, different doses of indole-3-butytric acid (IBA) were sprayed on the leaves of the lead (Pb) and zinc (Zn) accumulator plant Pseudostellaria maximowicziana, which was planted in Pb–Zn contaminated soil, and the effects of IBA on Pb and Zn accumulation levels in P. maximowicziana were studied. Spraying 25- and 50-mg/L IBA doses increased the stem, leaf and shoot biomasses of P. maximowicziana compared with the control, while 75- and 100-mg/L IBA doses decreased them. The 50-mg/L IBA dose increased the P. maximowicziana contents of chlorophyll a, total chlorophyll and carotenoid of compared with the control, and other doses had no significant effects or decreased these values. Spraying IBA reduced the superoxide dismutase activity of P. maximowicziana compared with the control, but improved the peroxidase and catalase activities. The 50-, 75-, and 100-mg/L IBA doses increased the Pb and Zn contents in P. maximowicziana compared with the control and also increased the amounts of Pb and Zn extracted by P. maximowicziana. Thus, 50 mg/L of IBA could promote the growth and the Pb and Zn phytoremediation capabilities of P. maximowicziana.
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We thank Lesley Benyon, PhD, from Liwen Bianji, Edanz Group China (www.liwenbianji.cn/ac), for editing the English text of a draft of this manuscript.
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Ran, Z., Chen, C., Chen, F. et al. Effects of indole-3-butytric acid on lead and zinc accumulations in Pseudostellaria maximowicziana. Environ Monit Assess 190, 212 (2018). https://doi.org/10.1007/s10661-018-6607-5
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DOI: https://doi.org/10.1007/s10661-018-6607-5