Heavy metal domestication enhances beneficial effects of arbuscular mycorrhizal fungi on lead (Pb) phytoremediation efficiency of Bidens parviflora through improving plant growth and root Pb accumulation

Yang, Yurong; Huang, Beitong; Xu, Jiazheng; Li, Zhenxin; Tang, Zhanhui; Wu, Xuefeng

doi:10.1007/s11356-022-18588-2

Cited by 25 publications

(6 citation statements)

References 46 publications

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“…However, the study results also indicate that AMF do not have a significant impact on chlorophyll content, Zn in shoots, or Zn in plant roots. Chlorophyll content serves as a primary indicator of plant photosynthetic capacity, and the lack of influence by AMF on chlorophyll suggests that these fungi may not directly affect the photosynthesis process [40]. The findings of this study differ from those of the previous studies [41][42] which demonstrated that AMF can enhance plant chlorophyll content.…”

Section: Discussioncontrasting

confidence: 98%

Unraveling the Effects of Arbuscular Mycorrhizal Fungi on Plant Growth, Nutrient Content, and Heavy Metal Accumulation in the Contaminated Soil: A Meta-analysis

Putra,

Jayanegara,

Susanto

2024

App. Envi. Res.

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This study evaluated the effects of arbuscular mycorrhizal fungi (AMF) on plant growth, nutrient uptake, and heavy metal accumulation on polluted land using a meta-analysis approach. Data from 33 relevant studies were selected based on inclusion criteria, specifically articles in English, observational research, and investigating the role of AMF in plant growth and productivity on polluted land. The results showed that plants inoculated with AMF experienced significant accumulation of heavy metals in roots, such as Pb (p<0.01), Ni (p<0.01), Cr (p<0.01), Mn (p<0.05), Fe (p<0.05), and As (p<0.05). The AMF significantly reduced the accumulation of heavy metals such as Cr, Ni, Fe, and Cu on the upper part of fodder forage (p<0.01). Forage growth was also enhanced due to AMF. The AMF greatly increased the fresh weight, length, and phosphorus (P) content of fodder forage roots (p<0.01). It also increased the plant's biomass, fresh weight, dry weight, height, nitrogen (N), phosphorus (P), and potassium (K) contents (p<0.01). In conclusion, AMF is important in increasing plant growth, nutrient uptake and reducing heavy metal accumulation in forage on polluted land.

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Section: Discussioncontrasting

confidence: 98%

Unraveling the Effects of Arbuscular Mycorrhizal Fungi on Plant Growth, Nutrient Content, and Heavy Metal Accumulation in the Contaminated Soil: A Meta-analysis

Putra,

Jayanegara,

Susanto

2024

App. Envi. Res.

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“…Enhanced nutrient availability results in these positive effects on plant growth, and this is partly explained by the complex interactions occurring between the fungi and plants. [67] Mycorrhizal fungi have still not been proven to be effective in the tolerance of heavy metal-contaminated soils, contrary to numerous studies [69]. The type of plant, fungus, and metal utilized can all influence the amount of metal taken up by plants treated with fungi.…”

Section: Discussionmentioning

confidence: 99%

Morphophysiological and Biochemical Responses of Zea mays L. under Cadmium and Drought Stresses Integrated with Fungal and Bacterial Inoculation

et al. 2023

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Cadmium and drought stress are the most destructive of the abiotic stresses with negative effects on both metabolism and photosynthesis. The present experiment aimed to analyze the impact of inoculation with Bacillus paralicheniformis and Trichoderma asperellum on the growth and antioxidant response modulation of maize (Zea mays L.), under drought and Cadmium (Cd) stresses. Regarding plant biomass analysis, fungi inoculation increased leaf dry biomass significantly (11.92%) towards uninoculated ones. The leaf area was affected significantly by bacterial application, 12.15% more than the control. A significant trend (drought+ Cd stress) was observed between fungi-inoculated maize leaves (15.07 µmol/g FW) and bacterial-inoculated leaves (18.71 µmol/g FW) regarding the malondialdehyde quantity. Furthermore, the activities of superoxide dismutase were notably higher (9.63–40.88%) in microorganism-inoculated roots. Similarly, under drought + Cd stress, peroxidase demonstrated a higher activity under bacterial inoculation than fungal ones (92.11% more). The maximum translocation factor was observed in the uninoculated group (under Cd stress), while the bioconcentration factor under drought stress showed a significant increase by microorganisms. The maximum relative water content under bacterial inoculation (82.66%) was achieved. The fungi and bacterial inoculation minimized Cd accumulation in the leaf significantly under drought and drought + Cd stress. Generally, the microorganism inoculation positively and partially maintained the plant’s performance, despite the presence of drought and Cd stress.

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“…Recently, many studies have shown that AMF colonization can increase the absorption area of roots, promote growth, and enhance heavy metal tolerance of host plants [ 35 , 36 ]. Understanding how cell wall components enhance heavy metal tolerance in plants is crucial, as these components serve as the initial line of defense for plants [ 6 , 24 ].…”

Section: Discussionmentioning

confidence: 99%

The Role of Lignin in the Compartmentalization of Cadmium in Maize Roots Is Enhanced by Mycorrhiza

Lao

Guo

Hao

et al. 2023

JoF

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In nature, arbuscular mycorrhizal fungi (AMF) play a crucial role in the root systems of plants. They can help enhance the resistance of host plants by improving the compartmentalization of toxic metal contaminants in the cell walls (CWs). However, the functions and responses of various CW subfractions to mycorrhizal colonization under Cd exposure remain unknown. Here we conducted a study to investigate how Cd is stored in the cell walls of maize roots colonized by Funneliformis mosseae. Our findings indicate that inoculating the roots with AMF significantly lowers the amount of Cd in the maize shoots (63.6 ± 6.54 mg kg−1 vs. 45.3 ± 2.19 mg kg−1, p < 0.05) by retaining more Cd in the mycorrhized roots (224.0 ± 17.13 mg kg−1 vs. 289.5 ± 8.75 mg kg−1, p < 0.01). This reduces the adverse effects of excessive Cd on the maize plant. Additional research on the subcellular distribution of Cd showed that AMF colonization significantly improves the compartmentalization of 88.2% of Cd in the cell walls of maize roots, compared to the 80.8% of Cd associated with cell walls in the non-mycorrhizal controls. We observed that the presence of AMF did not increase the amount of Cd in pectin, a primary binding site for cell walls; however, it significantly enhanced the content of lignin and the proportion of Cd in the total root cell walls. This finding is consistent with the increased activity of lignin-related enzymes, such as PAL, 4CL, and laccase, which were also positively impacted by mycorrhizal colonization. Fourier transform infrared spectroscopy (FTIR) results revealed that AMF increased the number and types of functional groups, including −OH/−NH and carboxylate, which chelate Cd in the lignin. Our research shows that AMF can improve the ability of maize plants to tolerate Cd by reducing the amount of Cd transferred from the roots to the shoots. This is achieved by increasing the amount of lignin in the cell walls, which binds with Cd and prevents it from moving through the plant. This is accomplished by activating enzymes related to lignin synthesis and increasing the exposure of Cd-binding functional groups of lignin. However, more direct evidence on the immobilization of Cd in the mycorrhiza-altered cell wall subfractions is needed.

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Heavy metal domestication enhances beneficial effects of arbuscular mycorrhizal fungi on lead (Pb) phytoremediation efficiency of Bidens parviflora through improving plant growth and root Pb accumulation

Cited by 25 publications

References 46 publications

Unraveling the Effects of Arbuscular Mycorrhizal Fungi on Plant Growth, Nutrient Content, and Heavy Metal Accumulation in the Contaminated Soil: A Meta-analysis

Unraveling the Effects of Arbuscular Mycorrhizal Fungi on Plant Growth, Nutrient Content, and Heavy Metal Accumulation in the Contaminated Soil: A Meta-analysis

Morphophysiological and Biochemical Responses of Zea mays L. under Cadmium and Drought Stresses Integrated with Fungal and Bacterial Inoculation

The Role of Lignin in the Compartmentalization of Cadmium in Maize Roots Is Enhanced by Mycorrhiza

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