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Bioaugmentation-assisted phytoremediation of manganese and cadmium co-contaminated soil by Polygonaceae plants (Polygonum hydropiper L. and Polygonum lapathifolium L.) and Enterobacter sp. FM-1
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Bioaugmentation-assisted phytoremediation of manganese and cadmium co-contaminated soil by Polygonaceae plants (Polygonum hydropiper L. and Polygonum lapathifolium L.) and Enterobacter sp. FM-1
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Bioaugmentation-assisted phytoremediation of manganese and cadmium co-contaminated soil by Polygonaceae plants (Polygonum hydropiper L. and Polygonum lapathifolium L.) and Enterobacter sp. FM-1
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Journal Article
Bioaugmentation-assisted phytoremediation of manganese and cadmium co-contaminated soil by Polygonaceae plants (Polygonum hydropiper L. and Polygonum lapathifolium L.) and Enterobacter sp. FM-1
2020
Overview
Aims
Polygonum hydropiper
L. and
Polygonum lapathifolium
L. are two of the well-known indigenous Mn-hyperaccumulators.
Enterobacter
sp. FM-1 is a plant growth-promoting bacterium (PGPB) that we found in our previous study. We intended to develop a novel strategy to improve Mn and Cd co-contaminated soil phytoremediation by using a Mn and Cd-resistant bacterium for soil bioaugmentation.
Methods
We carried out this study to investigate the effects of different
Enterobacter
sp. FM-1 inoculation concentrations (0, 5.0 × 10
5
, 1.0 × 10
6
and 1.4 × 10
6
CFU g
−1
soil) on the phytoremediation of Mn and Cd by
Polygonum hydropiper
L. and
Polygonum lapathifolium
L. in two types of Mn-Cd co-contaminated soil.
Results
In both soils, inoculation with
Enterobacter
sp. FM-1 promoted the growth of both plants. Moreover, inoculation with
Enterobacter
sp. FM-1 (≥1.0 × 10
6
CFU g
−1
soil) significantly increased soil Mn and Cd bioavailability and decreased the soil pH. Therefore, inoculation with
Enterobacter
sp. FM-1 (1.4 × 10
6
CFU g
−1
soil) improved Mn and Cd accumulation in both plants.
Polygonum hydropiper
L. presented excellent Mn accumulation in both soils. Additionally, both plants exhibited strong translocation and excellent phytoextraction and bioaccumulation abilities for Mn and Cd.
Conclusions
Our findings indicated that
Enterobacter
sp. FM-1 is a potent bioaugmentation agent that facilitates Mn and Cd phytoextraction in
Polygonum hydropiper
L. and
Polygonum lapathifolium
L.
Publisher
Springer International Publishing,Springer,Springer Nature B.V
Subject
