Differential responses of 23 maize cultivar seedlings to an arbuscular mycorrhizal fungus when grown in a metal-polluted soil

ZePeng, Yin; Zhang, Yan; Hu, Na; Shi, Yunfeng; Li, Tao; Zhao, Zhongqiu

doi:10.1016/j.scitotenv.2021.148015

Cited by 30 publications

(10 citation statements)

References 60 publications

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“…The symbiosis with Aznalcollar has the potential to increase phytoextraction efficiency, as has been reported previously with other fungal species [ 51 ]. These findings provide important information for developing the phytoremediation potential of metal-polluted arable soils via bioaugmented metal-accumulation provided by Aznalcollar fungi in wheat, as observed in previous studies [ 52 ]. In contrast, the strategy used by the non-indigenous AMFs, Custos, and Intraradices was to “exclude” HM, as though HM would be externally retained or somehow prevented from entering the plant.…”

Section: Discussionsupporting

confidence: 80%

Inoculation of Indigenous Arbuscular Mycorrhizal Fungi as a Strategy for the Recovery of Long-Term Heavy Metal-Contaminated Soils in a Mine-Spill Area

Silva-Castro

Cano

Moreno-Morillas

et al. 2022

JoF

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Symbiotic associations with arbuscular mycorrhizal fungi (AMF) offer an effective indirect mechanism to reduce heavy metal (HM) stress; however, it is still not clear which AMF species are more efficient as bioremediating agents. We selected different species of AMF: Rhizoglomus custos (Custos); Rhizoglomus sp. (Aznalcollar); and Rhizophagus irregularis (Intraradices), in order to study their inoculation in wheat grown in two soils contaminated with two levels of HMs; we tested the phytoprotection potential of the different AMF symbioses, as well as the physiological responses of the plants to HM stress. Plants inoculated with indigenous Aznalcollar fungus exhibited higher levels of accumulation, mainly in the shoots of most of the HM analyzed in heavily contaminated soil. However, the plants inoculated with the non-indigenous Custos and Intraradices showed depletion of some of the HM. In the less-contaminated soil, the Custos and Intraradices fungi exhibited the greatest bioaccumulation capacity. Interestingly, soil enzymatic activity and the enzymatic antioxidant systems of the plant increased in all AMF treatments tested in the soils with both degrees of contamination. Our results highlight the different AMF strategies with similar effectiveness, whereby Aznalcollar improves phytoremediation, while both Custos and Intraradices enhance the bioprotection of wheat in HM-contaminated environments.

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Section: Discussionsupporting

confidence: 80%

Inoculation of Indigenous Arbuscular Mycorrhizal Fungi as a Strategy for the Recovery of Long-Term Heavy Metal-Contaminated Soils in a Mine-Spill Area

Silva-Castro

Cano

Moreno-Morillas

et al. 2022

JoF

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“…Hyphae secrete a protein called glomalin-related soil protein (GRSP), which can alter the surface characteristics of soil particles and increase Cd adsorption [ 11 ]. AMF can also boost the nutrition and growth of the host plant, promote root growth and the secretion of low molecular organic acids, further promote the chelation and adsorption of Cd, reduce the toxicity of Cd and play an important role in soil Cd fixation [ 12 , 13 , 14 , 15 ]. AMF significantly affects the Cd distribution in plants; some studies found that Cd was mainly fixed in AMF-inoculated roots, and Cd transport to shoots was reduced, resulting in less Cd uptake in shoots [ 16 , 17 , 18 ].…”

Section: Introductionmentioning

confidence: 99%

Arbuscular Mycorrhizal Fungi Reduce Cadmium Leaching from Sand Columns by Reducing Availability and Enhancing Uptake by Maize Roots

Xiao-ling

Liang

et al. 2022

JoF

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To explore the effect of arbuscular mycorrhizal fungi (AMF) on the environmental migration of cadmium (Cd), a sand column-maize system containing 20 mg·L−1 Cd solution was used to investigate the AMF effect on maize growth, Cd uptake by maize, Cd adsorption by sand and Cd leaching loss. The results showed that AMF significantly increased the content of EE-GRSP and T-GRSP by 34.9% and 37.2%, respectively; the secretion of malonic acid, oxalic acid and succinic acid increased by 154.2%, 54.0% and 11.0%, respectively; the secretion of acetic acid and citric acid increased by 95.5% and 59.9%, respectively; and the length, surface area, volume, tip number and cross number of maize roots decreased by 10%, 15%, 17%, 20% and 36.4%, respectively. AMF significantly increased Cd adsorption by sand by 6.2%, Cd uptake by maize by 68.1%, and Cd leaching loss by 84.6%. In the sand column-maize system, 92.3% of the total Cd was adsorbed by sand, 5.9% was taken up by maize and 1.8% was lost due to leaching. Moreover, Cd adsorption by sand was significantly positively correlated with the GRSP content and oxalic acid secretion, and Cd uptake by roots was significantly negatively correlated with Cd leaching loss. Overall, AMF reduced the loss of Cd in the leaching solution by promoting the release of oxalic acid and GRSP, increasing the adsorption of Cd in the sand and fixing the Cd in the plant to the roots.

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“…To counter the significant increase in the Pb content of cultivated soils near industrial areas [ 52 , 53 ], chelating agents, such as EDTA and IDS, are used for phytoremediation projects because these agents can remove heavy metals from contaminated soils [ 43 , 54 ]. Maize is considered a potential phytoremediation crop for heavy metal-polluted soil [ 19 , 21 , 22 , 23 ]. Seen as direct seeding technology is commonly used in maize cultivation [ 46 , 47 ], seed germination and subsequent seedling growth are sensitive to the environment, especially in heavy metal-contaminated soils [ 55 , 56 ].…”

Section: Discussionmentioning

confidence: 99%

“…Studies have shown that using high-accumulating crops (metal accumulators), such as nonfood products and dedicated bioenergy crops, may be a feasible strategy for the phytoremediation of heavy metal-polluted soils [ 19 , 20 ]. Among diverse crop plants, maize ( Zea mays L.) exhibits the advantages of high biomass production and metal tolerant capacity; thus, it has been widely adopted for the phytomanagement of low- and medium-grade metal-contaminated soils [ 21 , 22 , 23 ]. Moreover, with the increasing global demand for maize due to population growth and industrial expansion, phytoremediation techniques that use maize to decontaminate contaminated environments represent cost-effective, environmentally friendly, and socially acceptable methods for remediating metal-contaminated soils [ 24 , 25 , 26 , 27 ].…”

Section: Introductionmentioning

confidence: 99%

Chelator Iminodisuccinic Acid Regulates Reactive Oxygen Species Accumulation and Improves Maize (Zea mays L.) Seed Germination under Pb Stress

Zhang

Sun

et al. 2022

Plants

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To explore the effects of iminodisuccinic acid (a chelating agent) on maize (Zea mays L.) seed germination under lead (Pb) stress, we comparatively analyzed the effects of applying different concentrations of iminodisuccinic acid (0, 5, 20, and 100 mmol·dm−3) and combined an addition of exogenous substances regulating reactive oxygen species production on maize seed germination, seedling growth, H2O2 content, NADPH oxidase activity, and antioxidant enzyme activities under Pb-stressed and Pb-free conditions. Iminodisuccinic acid (100 mmol·dm−3) significantly delayed seed germination under normal germination conditions and alleviated the inhibitory effects of Pb stress (20 mmol·dm−3) on seed germination. Under normal conditions (without Pb stress), the iminodisuccinic acid-induced inhibition of seed germination was enhanced by treatment with dimethylthiourea (a specific scavenger of reactive oxygen species) or diphenyleneiodonium chloride (a specific inhibitor of NADPH oxidase), but diminished by treatment with H2O2, CaCl2, diethyldithiocarbamic acid (a specific inhibitor of superoxide dismutase), or aminotriazole (a specific inhibitor of catalase). Under Pb stress, iminodisuccinic acid partially eliminated the excessive H2O2 accumulation, improved superoxide dismutase and catalase activity, and weakened the high NADPH oxidase activity. In addition, Ca2+ chelation may be essential for maintaining the reactive oxygen species’ balance and improving seed germination and seedling growth by iminodisuccinic acid supplementation in maize under Pb stress. The proposed iminodisuccinic acid supplementation-based method improved maize seed germination in Pb-polluted soil.

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Differential responses of 23 maize cultivar seedlings to an arbuscular mycorrhizal fungus when grown in a metal-polluted soil

Cited by 30 publications

References 60 publications

Inoculation of Indigenous Arbuscular Mycorrhizal Fungi as a Strategy for the Recovery of Long-Term Heavy Metal-Contaminated Soils in a Mine-Spill Area

Inoculation of Indigenous Arbuscular Mycorrhizal Fungi as a Strategy for the Recovery of Long-Term Heavy Metal-Contaminated Soils in a Mine-Spill Area

Arbuscular Mycorrhizal Fungi Reduce Cadmium Leaching from Sand Columns by Reducing Availability and Enhancing Uptake by Maize Roots

Chelator Iminodisuccinic Acid Regulates Reactive Oxygen Species Accumulation and Improves Maize (Zea mays L.) Seed Germination under Pb Stress

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