Fava bean intercropping with Sedum alfredii inoculated with endophytes enhances phytoremediation of cadmium and lead co-contaminated field

Tang, Lin; Hamid, Yasir; Zehra, Afsheen; Sahito, Zulfiqar Ali; He, Zhenli; Beri, Wolde Tefera; Khan, Muhammad Bilal; Yang, Xiaoe

doi:10.1016/j.envpol.2020.114861

Cited by 65 publications

(13 citation statements)

References 59 publications

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“…Intercropping significantly decreased the root/shoot ratio of E. japonicus while significantly enhancing the root/shoot ratio of P. × fraseri (as shown in Figure S2 ), It also disrupted the metal distribution among different organs, as observed in the increase in root Cd of E. japonicus and leaf Cu of P. × fraseri , while decreasing in the stem Cd of E. japonicus and the root Cu of P. × fraseri ( Figure 2 A,B), respectively. The change in the metal balance in the intercropping systems was also found in fava beans with Sedum alfredii [ 40 ], Galium aparine Linn. with Malachium Fr.…”

Section: Discussionmentioning

confidence: 87%

“…As observed in this study, the biomass of P. × fraseri and E. japonicus (48 and 33 g/plant, respectively) ( Figure 1 ) are approximately 11–137 times larger than that of Sedum alfredii Hance. [ 40 , 42 ].…”

Section: Discussionmentioning

confidence: 99%

“…The land equivalent ratio (LER) is commonly used to assess the intercropping advantage and is calculated as follows [ 40 ]: LER = (Y A I/Y A M) + (Y B I/Y B M) where Y A I and Y A M indicate the yields of plant A in the intercropping and monoculture systems, respectively. Y B I and Y B M indicate the yields of plant B in the intercropping and monoculture systems, respectively.…”

Section: Methodsmentioning

confidence: 99%

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Intercropping of Euonymus japonicus with Photinia × fraseri Improves Phytoremediation Efficiency in Cd/Cu/Zn Contaminated Field

Qiu¹,

Liu²,

Lin³

et al. 2022

Biology

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Intercropping plants for phytoremediation is a promising strategy in heavy metal-polluted soils. In this study, two typical greening plant species, Euonymus japonicus (E. japonicus) and Photinia × fraseri (P. × fraseri), were intercropped in a Cd/Cu/Zn-contaminated field. The phytoremediation efficiency was investigated by measuring the plant biomass, metal concentration, and mycorrhizal colonisation, as well as the effects on soil properties, including soil pH; soil total N; and available N, P, K, Cd, Cu, and Zn. The results showed that, compared with the monoculture system, intercropping significantly lowered the available Cd, Cu, and Zn contents, significantly improved the total and available N contents in rhizosphere soils of both plant species, and increased the hyphae colonisation rate of P. × fraseri. In both plants, intercropping significantly improved the total plant biomass. Furthermore, the concentrations Zn and Cd in the root of E. japonicus and Cu concentration in the root of P. × fraseri were enhanced by 58.16%, 107.74%, and 20.57%, respectively. Intercropping resulted in plants accumulating higher amounts of Cd, Cu, and Zn. This was particularly evident in the total amount of Cd in E. japonicus, which was 2.2 times greater than that in the monoculture system. Therefore, this study provides a feasible technique for improving phytoremediation efficiency using greening plants.

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Section: Discussionmentioning

confidence: 87%

Section: Discussionmentioning

confidence: 99%

Section: Methodsmentioning

confidence: 99%

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Intercropping of Euonymus japonicus with Photinia × fraseri Improves Phytoremediation Efficiency in Cd/Cu/Zn Contaminated Field

Qiu¹,

Liu²,

Lin³

et al. 2022

Biology

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“…These authors have made significant contributions to this field. Yang et al revealed that Sedum alfredii , could hyperaccumulate cadmium and lead; in addition, they conducted extensive studies on the enrichment mechanism and successfully applied it in phytoremediation [ 13 , 32 , 33 ]. Shuhe Wei conducted several studies in screening new cadmium hyperaccumulators and actively applied them in phytoremediation [ 9 , 34 , 35 ].…”

Section: Resultsmentioning

confidence: 99%

Knowledge Mapping of the Phytoremediation of Cadmium-Contaminated Soil: A Bibliometric Analysis from 1994 to 2021

Zhao

Lei

2022

IJERPH

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Cadmium pollution of soil threatens the environmental quality and human health. Phytoremediation of cadmium-contaminated soil has attracted global attention in recent decades. This study aimed to conduct a comprehensive and systematic review of the literature on phytoremediation of cadmium-contaminated soil based on bibliometric analysis. A total of 5494 articles published between 1994 and 2021 were retrieved from the Web of Science Core Collection. Our knowledge mapping presented the authors, journals, countries, institutions, and other basic information to understand the development status of phytoremediation of cadmium-contaminated soil. Based on a keyword cluster analysis, the identified major research domains were “biochar”, “Thlaspi caerulescens”, “endophytic bacteria”, “oxidative stress”, “EDTA”, and “bioconcentration factor”. Overall, this study provided a detailed summary of research trends and hotspots. Based on the keyword co-occurrence and burst analysis, the core concepts and basic theories of this field were completed in 2011. However, the pace of theoretical development has been relatively slow. Finally, future research trends/frontiers were proposed, such as biochar addition, rhizosphere bacterial community manipulation, cadmium subcellular distribution, and health risk assessment.

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“…The extensive root system of B. monnieri may be the reason for a higher uptake of heavy metals due to the availability of greater surface area for metal absorption (Patnaik & Abbasi, 2020). Similarly, different root exudation capacities of MPs may also be associated with differential adsorption of Pb and Cd (Tang et al, 2020). Also, the symbiotic interaction of rhizospheric soil microbes with roots, which affect the heavy metal bioavailability and their root absorption, may differ in these plants (Wang et al, 2020).…”

Section: Discussionmentioning

confidence: 99%

Biochar amendment reduced the risk associated with metal uptake and improved metabolite content in medicinal herbs

Nigam

Khare

Ahsan

et al. 2021

Physiologia Plantarum

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Contaminations of heavy metals such as lead (Pb) and cadmium (Cd) in medicinal plants (MPs) not only restrict their safe consumption due to health hazards but also lower their productivity. Biochar amendments in the soil are supposed to immobilize the toxic metals, improve the soil quality, and agricultural productivity. However, the impact of biochar on growth attributes, metal accumulation, pharmacologically active compounds of MPs, and health risk is less explored. An experiment was performed on three medicinal plants [Bacopa monnieri (L.), Andrographis paniculata (Burmf.) Nees, and Withania somnifera (L.)] grown in a greenhouse in soil co‐contaminated with Pb and Cd (at two concentrations) without and with biochar amendments (2% and 4% application rates). The fractionation of Pb and Cd, plant growth parameters, stress enzymes, photosynthetic capacity, pharmacologically active compounds, nutrient content, uptake and translocation of metals, antioxidant activities, and metabolite content were examined in the three MPs. The accumulation of Pb and Cd varied from 3.25–228 and 1.29–20.2 mg kg−1, respectively, in the three MPs, while it was reduced to 0.08–18 and 0.03–6.05 mg kg−1upon biochar treatments. Plants grown in Pb and Cd co‐contaminated soil had reduced plant biomass (5%–50% depending on the species) compared to control and a deleterious effect on photosynthetic attributes and protein content. However, biochar amendments significantly improved plant biomass (21%–175%), as well as photosynthesis attributes, chlorophyll, and protein contents. Biochar amendments in Pb and Cd co‐contaminated soil significantly reduced the health hazard quotient (HQ) estimated for the consumption of these medicinal herbs grown on metal‐rich soil. An enhancement in secondary metabolite content and antioxidant properties was also observed upon biochar treatments. These multiple beneficial effects of biochar supplementation in Pb and Cd co‐contaminated soil suggested that a biochar amendment is a sustainable approach for the safe cultivation of MPs.

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Fava bean intercropping with Sedum alfredii inoculated with endophytes enhances phytoremediation of cadmium and lead co-contaminated field

Cited by 65 publications

References 59 publications

Intercropping of Euonymus japonicus with Photinia × fraseri Improves Phytoremediation Efficiency in Cd/Cu/Zn Contaminated Field

Intercropping of Euonymus japonicus with Photinia × fraseri Improves Phytoremediation Efficiency in Cd/Cu/Zn Contaminated Field

Knowledge Mapping of the Phytoremediation of Cadmium-Contaminated Soil: A Bibliometric Analysis from 1994 to 2021

Biochar amendment reduced the risk associated with metal uptake and improved metabolite content in medicinal herbs

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