Hippuris vulgaris could replace Myriophyllum aquaticum for efficiently removing water phosphorus under low temperature conditions in China

Jianwei Cui; Jinfeng Li; Jian Cui; Yang Ruan; Yu Liang; Yue Wu; Yajun Chang; Xiaojing Liu; Dongrui Yao

doi:10.1016/j.jenvman.2023.117886

Hippuris vulgaris could replace Myriophyllum aquaticum for efficiently removing water phosphorus under low temperature conditions in China

J Environ Manage. 2023 Aug 1:339:117886. doi: 10.1016/j.jenvman.2023.117886. Epub 2023 Apr 19.

Authors

Jianwei Cui¹, Jinfeng Li¹, Jian Cui², Yang Ruan¹, Yu Liang¹, Yue Wu¹, Yajun Chang¹, Xiaojing Liu¹, Dongrui Yao³

Affiliations

¹ Institute of Botany, Jiangsu Province and Chinese Academy of Sciences (Nanjing Botanical Garden Mem. Sun Yat-Sen), Nanjing, 210014, China; Jiangsu Key Laboratory for the Research and Utilization of Plant Resources, Nanjing, 210014, China; Jiangsu Engineering Research Center of Aquatic Plant Resources and Water Environment Remediation, Nanjing, 210014, China.
² Institute of Botany, Jiangsu Province and Chinese Academy of Sciences (Nanjing Botanical Garden Mem. Sun Yat-Sen), Nanjing, 210014, China; Jiangsu Key Laboratory for the Research and Utilization of Plant Resources, Nanjing, 210014, China; Jiangsu Engineering Research Center of Aquatic Plant Resources and Water Environment Remediation, Nanjing, 210014, China. Electronic address: jcui@cnbg.net.
³ Institute of Botany, Jiangsu Province and Chinese Academy of Sciences (Nanjing Botanical Garden Mem. Sun Yat-Sen), Nanjing, 210014, China; Jiangsu Key Laboratory for the Research and Utilization of Plant Resources, Nanjing, 210014, China; Jiangsu Engineering Research Center of Aquatic Plant Resources and Water Environment Remediation, Nanjing, 210014, China. Electronic address: shuishengzu@126.com.

PMID: 37084539
DOI: 10.1016/j.jenvman.2023.117886

Abstract

Phytoremediation is widely used for the restoration of aquatic environments. However, the phytoremediation effects and mechanisms of special submerged species of native aquatic plants, especially under low-temperature conditions, are not yet clear. In this study, two typical submerged plants, Myriophyllum aquaticum (M. aquaticum; an exotic species) and Hippuris vulgaris (H. vulgaris; a native species), in China were investigated for their phosphorus (P) removal efficiencies (RE_p) and the related mechanisms of phytophysiology and microorganisms in a low-temperature incubator (10 °C during the day and 2 °C at night). At an initial P level of 0.5 mg L^-1, the two plants exhibited similar RE_p, with the highest values (73.5%-92.1%) observed on days 3-6. After 18 days, the residual P concentration in the water was less than the Grade III limit value (0.2 mg L^-1; GB 3838-2002). However, M. aquaticum had a faster RE_p velocity than H. vulgaris at an initial P level of 3.0 mg L^-1, which was attributed to the mechanisms of plant and its interactions with microorganisms. Compared to the control group, the superoxide dismutase activity of H. vulgaris was significantly increased and its catalase activity was decreased, whereas for that of M. aquaticum was the opposite. Micro region X-ray fluorescence analysis revealed that there may be synergic absorption effects between P, S, and K, and antagonistic absorption action between P and Mn in H. vulgaris. In addition, Acinetobacter, Novosphingobium and Pseudomonas were enriched at 3.0 mg L^-1 P level with these two plants, but Chlorophyta only accumulated with H. vulgaris, respectively. Overall, the native species, H. vulgaris, could replace the exotic M. aquaticum to efficiently remove P from polluted water at low temperatures. These findings provide a theoretical foundation for submerged plants P removal capabilities, and the protection of local ecosystem diversity at low temperatures.

Keywords: Interaction; Low temperature; Microorganism; Phytoremediation; Water phosphorus.

MeSH terms

China
Ecosystem*
Nitrogen / analysis
Phosphorus / analysis
Saxifragales*
Temperature
Water / analysis

Substances

Phosphorus
Water
Nitrogen