Physiological Response of Two Typical Plant Species under Combined Pb and Cd Stress in Bioretention Facilities
Bioretention facilities reduce stormwater runoff and pollutants, but there is a concern that plants in bioretention facilities may absorb heavy metal pollutants from stormwater runoff, which might impair the growth of the plant species. To investigate this issue, stormwater runoff containing various...
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| Format: | Article |
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MDPI AG
2022-12-01
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| Series: | Water |
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| Online Access: | https://www.mdpi.com/2073-4441/14/23/3923 |
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| author | Yongwei Gong Xiaoxiao Lu Zhihua Zhou Zhuolun Li Yanhong Li |
| author_facet | Yongwei Gong Xiaoxiao Lu Zhihua Zhou Zhuolun Li Yanhong Li |
| author_sort | Yongwei Gong |
| collection | DOAJ |
| description | Bioretention facilities reduce stormwater runoff and pollutants, but there is a concern that plants in bioretention facilities may absorb heavy metal pollutants from stormwater runoff, which might impair the growth of the plant species. To investigate this issue, stormwater runoff containing various amounts of Pb and Cd heavy metals was used as the irrigation water in a bioretention facility. The low concentrations of Pb and Cd were 0.08 and 0.04 mg/L, and the high values were 0.68 and 0.32 mg/L. The plant heavy metal content and physiological indicators were measured. The indicators were chlorophyll content (CC), net photosynthetic rate (NPR), and transpiration rate (TR). The results showed that the changes in plant chlorophyll content (CC) were highly correlated with changes in the plants’ Pb. Low concentrations of Pb and Cd slightly inhibited the <i>Ginkgo biloba</i> L. and <i>Ligustrum</i> × <i>vicaryi</i> NPRs, the effect was more obvious at high concentrations and the <i>Ligustrum</i> × <i>vicaryi</i>’s NPR decreased from the initial 8.97 μmol CO<sub>2</sub>/(m<sup>2</sup>s) to 5.77 μmol CO<sub>2</sub>/(m<sup>2</sup>s) under high concentration conditions. Pb and Cd increased the <i>Ginkgo biloba</i> L. and <i>Ligustrum</i> × <i>vicaryi</i>’s TRs, and the effect at low Pb and Cd concentrations was more significant. Under low concentrations of Pb and Cd stress, the <i>Ginkgo biloba</i> L.’s TRs reached 0.63 mmol H<sub>2</sub>O/(m<sup>2</sup>s), <i>Ligustrum</i> × <i>vicaryi</i>’s TRs reached 1.30 mmol H<sub>2</sub>O/(m<sup>2</sup>s). The TRs of the two plants in the experimental groups remained high throughout the experiment, and there was no significant inhibition. The study found that Pb and Cd in stormwater runoff did affect the physiological function of species to some extent. Different plant species behaved differently in bioretention facilities, but the stormwater runoff did not lead to the death of species. Our study may provide a better understanding of the development of typical plant species in bioretention facilities. |
| first_indexed | 2024-03-09T17:28:08Z |
| format | Article |
| id | doaj.art-95fcaf3b84a54b78872ba722b1908068 |
| institution | Directory Open Access Journal |
| issn | 2073-4441 |
| language | English |
| last_indexed | 2024-03-09T17:28:08Z |
| publishDate | 2022-12-01 |
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| series | Water |
| spelling | doaj.art-95fcaf3b84a54b78872ba722b19080682023-11-24T12:33:31ZengMDPI AGWater2073-44412022-12-011423392310.3390/w14233923Physiological Response of Two Typical Plant Species under Combined Pb and Cd Stress in Bioretention FacilitiesYongwei Gong0Xiaoxiao Lu1Zhihua Zhou2Zhuolun Li3Yanhong Li4Key Laboratory of Urban Stormwater System and Water Environment, Ministry of Education, Beijing University of Civil Engineering and Architecture, Beijing 100044, ChinaKey Laboratory of Urban Stormwater System and Water Environment, Ministry of Education, Beijing University of Civil Engineering and Architecture, Beijing 100044, ChinaKey Laboratory of Urban Stormwater System and Water Environment, Ministry of Education, Beijing University of Civil Engineering and Architecture, Beijing 100044, ChinaKey Laboratory of Urban Stormwater System and Water Environment, Ministry of Education, Beijing University of Civil Engineering and Architecture, Beijing 100044, ChinaBeijing Guohuan Tsinghua Environmental Engineering Design & Research Institute Co., Ltd., Beijing 100084, ChinaBioretention facilities reduce stormwater runoff and pollutants, but there is a concern that plants in bioretention facilities may absorb heavy metal pollutants from stormwater runoff, which might impair the growth of the plant species. To investigate this issue, stormwater runoff containing various amounts of Pb and Cd heavy metals was used as the irrigation water in a bioretention facility. The low concentrations of Pb and Cd were 0.08 and 0.04 mg/L, and the high values were 0.68 and 0.32 mg/L. The plant heavy metal content and physiological indicators were measured. The indicators were chlorophyll content (CC), net photosynthetic rate (NPR), and transpiration rate (TR). The results showed that the changes in plant chlorophyll content (CC) were highly correlated with changes in the plants’ Pb. Low concentrations of Pb and Cd slightly inhibited the <i>Ginkgo biloba</i> L. and <i>Ligustrum</i> × <i>vicaryi</i> NPRs, the effect was more obvious at high concentrations and the <i>Ligustrum</i> × <i>vicaryi</i>’s NPR decreased from the initial 8.97 μmol CO<sub>2</sub>/(m<sup>2</sup>s) to 5.77 μmol CO<sub>2</sub>/(m<sup>2</sup>s) under high concentration conditions. Pb and Cd increased the <i>Ginkgo biloba</i> L. and <i>Ligustrum</i> × <i>vicaryi</i>’s TRs, and the effect at low Pb and Cd concentrations was more significant. Under low concentrations of Pb and Cd stress, the <i>Ginkgo biloba</i> L.’s TRs reached 0.63 mmol H<sub>2</sub>O/(m<sup>2</sup>s), <i>Ligustrum</i> × <i>vicaryi</i>’s TRs reached 1.30 mmol H<sub>2</sub>O/(m<sup>2</sup>s). The TRs of the two plants in the experimental groups remained high throughout the experiment, and there was no significant inhibition. The study found that Pb and Cd in stormwater runoff did affect the physiological function of species to some extent. Different plant species behaved differently in bioretention facilities, but the stormwater runoff did not lead to the death of species. Our study may provide a better understanding of the development of typical plant species in bioretention facilities.https://www.mdpi.com/2073-4441/14/23/3923PbCdbioretention facilitiesphysiological responsestormwater runoff<i>Ginkgo biloba</i> L. |
| spellingShingle | Yongwei Gong Xiaoxiao Lu Zhihua Zhou Zhuolun Li Yanhong Li Physiological Response of Two Typical Plant Species under Combined Pb and Cd Stress in Bioretention Facilities Water Pb Cd bioretention facilities physiological response stormwater runoff <i>Ginkgo biloba</i> L. |
| title | Physiological Response of Two Typical Plant Species under Combined Pb and Cd Stress in Bioretention Facilities |
| title_full | Physiological Response of Two Typical Plant Species under Combined Pb and Cd Stress in Bioretention Facilities |
| title_fullStr | Physiological Response of Two Typical Plant Species under Combined Pb and Cd Stress in Bioretention Facilities |
| title_full_unstemmed | Physiological Response of Two Typical Plant Species under Combined Pb and Cd Stress in Bioretention Facilities |
| title_short | Physiological Response of Two Typical Plant Species under Combined Pb and Cd Stress in Bioretention Facilities |
| title_sort | physiological response of two typical plant species under combined pb and cd stress in bioretention facilities |
| topic | Pb Cd bioretention facilities physiological response stormwater runoff <i>Ginkgo biloba</i> L. |
| url | https://www.mdpi.com/2073-4441/14/23/3923 |
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