Effects of root exudates on the activation and remediation of cadmium ion in contaminated soils

Chen, Cheng; Li, Zhongbao; Li, Shengjin; Deng, Nanxin; Mei, Ping

doi:10.1007/s11356-019-07263-8

Cited by 27 publications

(12 citation statements)

References 27 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Phytoremediation is the process of removal of water and soil contaminants, especially by using the plant root system (Upadhyay and Edrisi, 2021 ). The role of root exudate in the removal of soil and water contaminants has been reported outstandingly (Gleba et al, 1999 ; Ma et al, 2016 ; Chen et al, 2020 ). Different components of root exudates play a specific role in the removal of certain contaminants from the soil and groundwater.…”

Section: Future Perspectivesmentioning

confidence: 99%

Root Exudates: Mechanistic Insight of Plant Growth Promoting Rhizobacteria for Sustainable Crop Production

Srivastava²,

et al. 2022

View full text Add to dashboard Cite

The breaking silence between the plant roots and microorganisms in the rhizosphere affects plant growth and physiology by impacting biochemical, molecular, nutritional, and edaphic factors. The components of the root exudates are associated with the microbial population, notably, plant growth-promoting rhizobacteria (PGPR). The information accessible to date demonstrates that PGPR is specific to the plant's roots. However, inadequate information is accessible for developing bio-inoculation/bio-fertilizers for the crop in concern, with satisfactory results at the field level. There is a need to explore the perfect candidate PGPR to meet the need for plant growth and yield. The functions of PGPR and their chemotaxis mobility toward the plant root are triggered by the cluster of genes induced by the components of root exudates. Some reports have indicated the benefit of root exudates in plant growth and productivity, yet a methodical examination of rhizosecretion and its consequences in phytoremediation have not been made. In the light of the afore-mentioned facts, in the present review, the mechanistic insight and recent updates on the specific PGPR recruitment to improve crop production at the field level are methodically addressed.

show abstract

Section: Future Perspectivesmentioning

confidence: 99%

Root Exudates: Mechanistic Insight of Plant Growth Promoting Rhizobacteria for Sustainable Crop Production

Srivastava²,

et al. 2022

View full text Add to dashboard Cite

show abstract

“…Using the improved Hoagland solution as a culture medium, 20 S. sudanense seeds were placed in each Petri dish and cultured in a climate chamber. The nutrient element composition of the improved Hoagland solution (Chen et al, 2020) was as follows: 5.0 mmol/l Ca 2+ , 5.0 mmol/l K + , 1.0 mmol/l KH 2 PO 4 , 1.0 mmol/l Mg 2+ , 1.0 mmol/l Zn 2+ , and 1.0 mmol/l Cu 2+ . The temperature was maintained at 25 ± 0.5°C, the humidity was at 75 ± 5%, light intensity was at 80 ± 1 lx, and day: night photoperiod was 16:8 h. Seedlings were transplanted when they had 2-3 true leaves (Aram et al, 2021).…”

Section: Test Designmentioning

confidence: 99%

Impact of soil types and root exudates on cadmium and petroleum hydrocarbon phytoremediation by Sorghum sudanense, Festuca arundinace, and Lolium perenne

Chen

et al. 2022

Front. Ecol. Evol.

View full text Add to dashboard Cite

With the development of industrialization, soils around the world have been polluted by heavy metals and oil to different degrees in recent years, and soil remediation has become a global problem. Phytoremediation has a wide application prospect because of its environmental friendliness and easy availability of materials.ObjectiveTo explore the effects of soil types and root exudates on the removal of cadmium and petroleum hydrocarbon in soils.MethodA pot experiments with three soil types (sandy, loamy and clayey) of the Changning-Weiyuan area of Sichuan province and three root exudates (citric acid, glycine, and maltose) were carried out using Sorghum sudanense (Piper) Stapf., Lolium perenne L., and Festuca arundinacea L. as test materials. Plants were grown in soils contaminated by cadmium and petroleum at different concentrations.ResultThe biomass of S. sudanense, the translocation ratio and removal rate of cadmium in S. sudanense decreased gradually with increasing soil cadmium concentration. The promotion effects of the three root exudates on S. sudanense were in the following order: citric acid > glycine > maltose. At the same cadmium pollution conditions, the biomass levels of S. sudanense in sandy, loamy, and clayey soils were in the following order: clayey soil > loamy soil > sandy soil. On the contrary, the concentration, translocation ratio, and removal rate of cadmium in S. sudanense grown in the different soils treated with root exudates were in the following order: sandy soil > loamy soil > clayey soil. Under the three soil conditions, the fresh weight of F. arundinacea (0.36 ~ 0.68 g) and S. sudanense (0.51 ~ 0.99 g) increased significantly (p < 0.05). The total petroleum hydrocarbons degradation efficiencies of F. arundinacea, L. perenne, and S. sudanense were high in sandy soil (34.27% ~ 60.52%). Changing the type of root exudate had a significant impact on the degradation of total petroleum hydrocarbons in sandy soil (p < 0.05).ConclusionThis study showed that soil types impacted the accumulation of cadmium and petroleum in plants. Phytoremediation of cadmium and petroleum contaminated soil could be enhanced by the application of root exudates. This study recommend that the method is suitable for field remediation of soils contaminated with mild cadmium and petroleum hydrocarbons.

show abstract

“…The root secretions and the cell wall of root epidermal cells play an important role in limiting Cd uptake and Cd accumulation in the roots [ 58 ]. Root exudates can form complexes or precipitates with external Cd, thereby retaining Cd on the root epidermis [ 119 ]; organic acids in different types of root exudates also have different adsorption effects on Cd in the soil, so that Cd in the soil enters the plant roots in different chemical forms. Therefore, the bioavailability of Cd in the soil environment can be conversed by changing the root exudates [ 119 ].…”

Section: The Mechanisms Of Plant Enrichment Of CDmentioning

confidence: 99%

“…Root exudates can form complexes or precipitates with external Cd, thereby retaining Cd on the root epidermis [ 119 ]; organic acids in different types of root exudates also have different adsorption effects on Cd in the soil, so that Cd in the soil enters the plant roots in different chemical forms. Therefore, the bioavailability of Cd in the soil environment can be conversed by changing the root exudates [ 119 ]. Lowering the pH increases the solubility of Cd compounds in the soil and, hence, the bioavailability of Cd 2+ .…”

Section: The Mechanisms Of Plant Enrichment Of CDmentioning

confidence: 99%

“…Lowering the pH increases the solubility of Cd compounds in the soil and, hence, the bioavailability of Cd 2+ . An appropriate concentration of root exudates can promote the transfer of Cd from roots to leaves for accumulation in the leaves [ 119 ]. The root cell wall is mainly composed of cellulose, hemicellulose, and pectin, which are rich in hydroxyl, thiol, and carboxyl functional groups.…”

Section: The Mechanisms Of Plant Enrichment Of CDmentioning

confidence: 99%

See 1 more Smart Citation

Research on the Mechanisms of Plant Enrichment and Detoxification of Cadmium

Yang

Zheng

Tan

et al. 2021

Biology

View full text Add to dashboard Cite

The heavy metal cadmium (Cd), as one of the major environmentally toxic pollutants, has serious impacts on the growth, development, and physiological functions of plants and animals, leading to deterioration of environmental quality and threats to human health. Research on how plants absorb and transport Cd, as well as its enrichment and detoxification mechanisms, is of great significance to the development of phytoremediation technologies for ecological and environmental management. This article summarises the research progress on the enrichment of heavy metal cadmium in plants in recent years, including the uptake, transport, and accumulation of Cd in plants. The role of plant roots, compartmentalisation, chelation, antioxidation, stress, and osmotic adjustment in the process of plant Cd enrichment are discussed. Finally, problems are proposed to provide a more comprehensive theoretical basis for the further application of phytoremediation technology in the field of heavy metal pollution.

show abstract

Effects of root exudates on the activation and remediation of cadmium ion in contaminated soils

Cited by 27 publications

References 27 publications

Root Exudates: Mechanistic Insight of Plant Growth Promoting Rhizobacteria for Sustainable Crop Production

Root Exudates: Mechanistic Insight of Plant Growth Promoting Rhizobacteria for Sustainable Crop Production

Impact of soil types and root exudates on cadmium and petroleum hydrocarbon phytoremediation by Sorghum sudanense, Festuca arundinace, and Lolium perenne

Research on the Mechanisms of Plant Enrichment and Detoxification of Cadmium

Contact Info

Product

Resources

About