Upland rice intercropping with Solanum nigrum inoculated with arbuscular mycorrhizal fungi reduces grain Cd while promoting phytoremediation of Cd-contaminated soil

Yang, Xu; Qin, Junhao; Li, Jiachun; Lai, Zhenai; Li, Huashou

doi:10.1016/j.jhazmat.2020.124325

Cited by 70 publications

(29 citation statements)

References 75 publications

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“…This finding is consistent with a previous study (Ji et al, 2017). In addition, intercropping of hyperaccumulators with edible plants is a widely developed strategy that enhances phytoremediation without affecting crop production or quality (Deng et al 2016;Yang et al 2021;Zou et al 2021). Therefore, intercropping Sedum plumbizincicola in wheat growth season under wheat-rice rotation can improve phytoremediation of heavy metal-contaminated soil and decrease the food chain risk of rotated rice (Zhao et al 2011).…”

Section: Discussionmentioning

confidence: 99%

Root-associated microbiota drive phytoremediation strategies to lead of Sonchus Asper (L.) Hill as revealed by intercropping-induced modifications of the rhizosphere microbiome

Mei

Wang

et al. 2021

Environ Sci Pollut Res

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Intercropping or assistant endophytes promote phytoremediation capacities of hyperaccumulators and enhance their tolerance to heavy metal (HM) stress. Findings from a previous study showed that intercropping the hyperaccumulator Sonchus asper (L.) Hill grown in HM-contaminated soils with maize improved the remediating properties and indicated an excluder-to-hyperaccumulator switched mode of action towards lead. In the current study, RNA-Seq analysis was conducted on Sonchus roots grown under intercropping or monoculture systems to explore the molecular events underlying this shift in lead sequestering strategy. The findings showed that intercropping only slightly affects S. asper transcriptome but significantly affects expression of root-associated microbial genomes. Further, intercropping triggers significant reshaping of endophytic communities associated with a ‘root-to-shoot’ transition of lead sequestration and improved phytoremediation capacities of S. asper. These findings indicate that accumulator activities of a weed are partially attributed to the root-associated microbiota, and a complex network of plant–microbe-plant interactions shapes the phytoremediation potential of S. asper. Analysis showed that intercropping may significantly change the structure of root-associated communities resulting in novel remediation properties, thus providing a basis for improving phytoremediation practices to restore contaminated soils.

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Section: Discussionmentioning

confidence: 99%

Root-associated microbiota drive phytoremediation strategies to lead of Sonchus Asper (L.) Hill as revealed by intercropping-induced modifications of the rhizosphere microbiome

Mei

Wang

et al. 2021

Environ Sci Pollut Res

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“…5d). The research of Yang et al (2020) found that the citric and malic acids in rhizosphere soil of inoculating AMF were signi cantly higher than the control under Cd stress. Besides, the decrease of exchangeable Cd form may be due to the signi cant reduction of organic acid release from soybean roots by S. indica (Fig.…”

Section: Effects Of S Indica On the Activities Of Soil Enzymes Under CD Stressmentioning

confidence: 93%

Combined Effects of Inoculating Serendipita Indica on Soybean Growth and Soil Health Under Cd Stress

Wang

Wei-dong

Fan

2021

Preprint

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Cadmium (Cd) pollution in the soil is a global environmental problem. Plants-microbial technology has been regarded as a potential technique for the remediation of Cd polluted soils. Here, we aimed to explore the combined effects of inoculating (Serendipita indica) S. indica on soybean growth and soil health under Cd stress. Therefore, a pot experiment was conducted to investigate the S. indica on soybean growth and the soil enzyme activities, pH and chemical forms of Cd in the soil under Cd 0, 10, 20, 30 mg/kg soil teatments. Results reflected that compared to non-inoculated ones, the application of S. indica can still enhance the dry weight (66.57%), shoot height (90.35%) and promote the net photosynthesis rate (72.18%), transpiration ratio (80.73%), and stomatal conductance (119.05%) photosynthesis of soybean under Cd 30 mg/kg soil. Furthermore, The pH, phosphatase (116.39%) and catalase (4.17%) activities in the S. indica treatments were increased under Cd 10 mg/kg soil. Meanwhile, inoculated S. indica treatments significantly shifted Cd from exchangeable fraction to other more stable fractions, primarily decreased Cd concentrations (23.66%) under Cd 20 mg/kg soil. The Cd pollution assessment in soil indicated that S. indica could effectively reduce Cd pollution in the Cd 10 mg/kg soil treatments. This work suggests that S. indica may be a potential method for not only promoting plant growth, but also relieving the phytotoxicity of Cd and remediating Cd contaminated soil.

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“…For example, AM fungal inoculation enhanced cadmium (Cd) acquisition by Alfred stonecrop (Sedum alfredii) over the neighboring upland kangkong (Ipomoea aquatica), increased soil P availability through activating phosphatase activity, and reduced soil available Cd concentrations via elevating soil pH (Hu et al, 2013a(Hu et al, , 2013b. In a recent study reported by Yang et al (2021), AM fungal inoculation also reduced Cd concentration in upland rice through regulating Cd transporter genes in rice, increasing the root surface area and Cd acquisition of the intercropped black nightshade (Solanum nigrum), and modulating root exudation and rhizosphere pH to decrease Cd availability for rice and increase that for nightshade. In a heavy metal-polluted soil, AM fungal inoculation alleviated the toxicity level and increased the yield of garlic chives (Allium tubersosum) intercropped with sunflower (Helianthus annuus) via enhancing soil phosphatase activity and plant P acquisition, along with increased availabilities of heavy metals in soil and acquisitions by sunflower (Zhang et al, 2019).…”

Section: The Function Of Am Fungi For Soil Remediation In Intercropping Systemsmentioning

confidence: 99%

The roles and performance of arbuscular mycorrhizal fungi in intercropping systems

Lin

2021

Soil Ecol. Lett.

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Intercropping, which gains productivity and ecological benefits through plant facilitative interactions, is a practice often associated with sustainable agriculture. In such systems, arbuscular mycorrhizal (AM) fungi and the hyphal networks play key roles in plant facilitation by promoting connectivity, mediating interplant transfer of metabolic resources, and managing weeds, pathogens, and contaminants. This review states that the symmetrically or unsymmetrically delivered resources via AM fungi are imperative to maintain facilitative interactions between intercrops. In addition, the responses of AM fungi to intercropping are also discussed, including changes in abundance, diversity, community composition and colonization level. Although general proliferations in AM fungi via intercropping have been shown, the plant hosts and neighbors may exert different influences on AM fungi. Therefore, further research is needed in quantifying the mediating role of AM fungi on outputs of intercropping systems, clarifying the driving forces, and exploring the causation between these processes and the changes in AM fungi themselves. To conclude, the integration with AM fungi extends the understanding of key soil biological processes driving plant facilitation and will guide efforts to optimizing intercropping systems.

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Upland rice intercropping with Solanum nigrum inoculated with arbuscular mycorrhizal fungi reduces grain Cd while promoting phytoremediation of Cd-contaminated soil

Cited by 70 publications

References 75 publications

Root-associated microbiota drive phytoremediation strategies to lead of Sonchus Asper (L.) Hill as revealed by intercropping-induced modifications of the rhizosphere microbiome

Root-associated microbiota drive phytoremediation strategies to lead of Sonchus Asper (L.) Hill as revealed by intercropping-induced modifications of the rhizosphere microbiome

Combined Effects of Inoculating Serendipita Indica on Soybean Growth and Soil Health Under Cd Stress

The roles and performance of arbuscular mycorrhizal fungi in intercropping systems

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