Phytoremediation technology has become one of the main techniques for remediating soils polluted by heavy metals because it does not damage the environment, but heavy metal-tolerant plants have the disadvantages of low biomass and slow growth. A pot experiment was conducted to study the effects of melatonin (Mel) on growth and cadmium (Cd) accumulation in the Cd accumulator Malachium aquaticum and hyperaccumulator Galinsoga parviflora by spraying different concentrations of Mel on them. The results showed that shoot biomass, photosynthetic pigment content and antioxidant enzyme activity were increased in both species after Mel was sprayed on their leaves. Mel reduced the Cd content in shoots of M. aquaticum and increased it in those of G. parviflora. In general, Cd accumulation was greatest in M. aquaticum when Mel was 200 μmol L (120.71 μg plant, increased by 15.97% than control) and in G. parviflora when Mel was 100 μmol L (132.40 μg plant, increased by 68.30% than control). Our results suggest it is feasible to improve the remediation efficiency of lightly Cd-contaminated soil by spraying G. parviflora with100 μmol L Mel.

Download full-text PDF

Source
http://dx.doi.org/10.1080/15226514.2017.1374341DOI Listing

Publication Analysis

Top Keywords

growth cadmium
8
cadmium accumulation
8
malachium aquaticum
8
galinsoga parviflora
8
plant increased
8
mel
7
parviflora
5
melatonin growth
4
accumulation malachium
4
aquaticum
4

Similar Publications

Want AI Summaries of new PubMed Abstracts delivered to your In-box?

Enter search terms and have AI summaries delivered each week - change queries or unsubscribe any time!