Synergistic effects of Arbuscular mycorrhizal fungi and plant growth promoting rhizobacteria in bioremediation of iron contaminated soils

Mishra, Vartika; Gupta, Antriksh; Kaur, Parvinder; Singh, Simranjeet; Singh, Nasib; Gehlot, Praveen; Singh, Joginder

doi:10.1080/15226514.2015.1131231

Cited by 93 publications

(24 citation statements)

References 23 publications

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“…Some studies have reported the beneficial effects of dual inoculation with arbuscular mycorrhizal fungi, such as Glomus sp., Acaulospora sp., and Scutellospora sp., and plant growth-promoting rhizobacteria, such as Actinomycetes sp., Paenibacillus sp., Pseudomonas sp., and Azotobacter sp. on Pennisetum glaucum , and Sorghum bicolor , which showed a significant increase in plant growth, biomass, and bioremediation of the iron-contaminated soil ( Mishra et al, 2016 ). However, knowledge is lacking on the association of fungal and bacterial endophytes and their interaction with G. max , as well as the underlying mechanism for encountering stresses in the metal-contaminated soil.…”

Section: Discussionmentioning

confidence: 99%

Endophytic Microbial Consortia of Phytohormones-Producing Fungus Paecilomyces formosus LHL10 and Bacteria Sphingomonas sp. LK11 to Glycine max L. Regulates Physio-hormonal Changes to Attenuate Aluminum and Zinc Stresses

et al. 2018

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The compatible microbial consortia containing fungal and bacterial symbionts acting synergistically are applied to improve plant growth and eco-physiological responses in extreme crop growth conditions. However, the interactive effects of phytohormones-producing endophytic fungal and bacterial symbionts plant growth and stress tolerance under heavy metal stress have been least known. In the current study, the phytohormones-producing endophytic Paecilomyces formosus LHL10 and Sphingomonas sp. LK11 revealed potent growth and tolerance during their initial screening against combined Al and Zn (2.5 mM each) stress. This was followed with their co-inoculation in the Al- and Zn-stressed Glycine max L. plants, showing significantly higher plant growth attributes (shoot/root length, fresh/dry weight, and chlorophyll content) than the plants solely inoculated with LHL10 or LK11 and the non-inoculated (control) plants under metal stresses. Interestingly, under metal stress, the consortia exhibited lower metal uptake and inhibited metal transport in roots. Metal-induced oxidative stresses were modulated in co-inoculated plants through reduced hydrogen peroxide, lipid peroxidation, and antioxidant enzymes (catalase and superoxide dismutase) in comparison to the non-inoculated plants. In addition, endophytic co-inoculation enhanced plant macronutrient uptake (P, K, S, and N) and modulated soil enzymatic activities under stress conditions. It significantly downregulated the expression of heavy metal ATPase genes GmHMA13, GmHMA18, GmHMA19, and GmPHA1 and upregulated the expression of an ariadne-like ubiquitin ligase gene GmARI1 under heavy metals stress. Furthermore, the endogenous phytohormonal contents of co-inoculated plants revealed significantly enhanced gibberellins and reduced abscisic acid and jasmonic acid contents, suggesting that this endophytic interaction mitigated the adverse effect of metal stresses in host plants. In conclusion, the co-inoculation of the endophytic fungus LHL10 and bacteria LK11 actively contributed to the tripartite mutualistic symbiosis in G. max under heavy metal stresses; this could be used an excellent strategy for sustainable agriculture in the heavy metal-contaminated fields.

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Section: Discussionmentioning

confidence: 99%

Endophytic Microbial Consortia of Phytohormones-Producing Fungus Paecilomyces formosus LHL10 and Bacteria Sphingomonas sp. LK11 to Glycine max L. Regulates Physio-hormonal Changes to Attenuate Aluminum and Zinc Stresses

et al. 2018

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“…In field conditions, a synergistic effect of plant-growth-promoting rhizobacteria and AMF on wheat P uptake was observed: a higher P content (67.8 mg plant −1 ) was observed with the co-inoculation of Azotobacter chroococcum with Bacillus spp. and Rhizophagus fasciculatus [33].…”

Section: Uptake and Translocation Of Soil Nutrientsmentioning

confidence: 98%

A Review of Studies from the Last Twenty Years on Plant–Arbuscular Mycorrhizal Fungi Associations and Their Uses for Wheat Crops

et al. 2019

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The aim of this work was to summarize the most recent research focused on the study of plant–arbuscular mycorrhizal fungi (AMF) symbiosis, both in a generic context and in the specific context of wheat cultivation. Taking into account the last 20 years, the most significant studies on the main plant advantages taken from this association are reviewed herein. Positive advances that have been reported stem from the mutualistic relationship between the plant and the mycorrhizal fungus, revealing better performance for the host in terms of nutrient uptake and protection from salinity, lack of water, and excess phytotoxic elements. Mycorrhiza studies and the recent progress in research in this sector have shown a possible solution for environmental sustainability: AMF represent a valid alternative to overcome the loss of biological fertility of soils, reduce chemical inputs, and alleviate the effects of biotic and abiotic stress.

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“…In addition to Fe and P, AMF are often associated with mobilization of insoluble nutrients such as, Zn and Cu complexes (Lehmann and Rillig, 2015). In particular, Glomus (order Glomerales), Acaulospora (order Diversisporales) and Scutellospora (family Gigasporaceae), appear to be able to produce siderophores and are thought to increase the extent of Fe absorption in plants such as Pennisetum glaucum (Pearl millet) and Sorghum bicolor (sorghum) growing in Fe 3+ contaminated soil (Mishra et al, 2016). In a heavy metal contaminated sediment the class Microbotryomycetes in phylum Basidiomycota was observed to be resistant to high levels of Fe and other heavy metals (Pb, Mn, Cd, Cu and Zn) (Abdel-Azeem et al, 2015).…”

Section: Fungal But Not Bacterial Communities Impacted By Foliar Fe Amentioning

confidence: 99%

Foliar application of Fe resonates to the belowground rhizosphere microbiome in Andean landrace potatoes

Xiao

Rodrigues

Bonierbale

et al. 2018

Applied Soil Ecology

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Iron (Fe) is a crucial nutrient for plant growth (e.g. chlorophyll production), and though it is one of the most abundant elements in soil, very low bioavailability can limit plant growth. Studies indicate that many soil bacteria and fungi (e.g. mycorrhizal) play a role in Fe nutrient cycling and plant production, but the evidence for fungal support of plant growth is overwhelmingly correlative and in need of experimental corroboration. An Andean native potato landrace was grown in a greenhouse under Fe limitation and using three levels (Low, Medium, High) of foliar fertilization (FeEDDHA). Application occurred at 45, 60 and 70 days of growth corresponding to periods where Fe limitation is expected to be greatest. The rhizosphere soils were sampled at the flowering stage (80 days). Soil bacterial and fungal communities were examined using high-throughput sequencing of 16S and ITS regions of ribosomal RNA gene, respectively, followed by analysis using Quantitative Insights Into Microbial Ecology (QIIME v1.8). Multivariate data analyses showed that Fe fertilization of leaves significantly (p < 0.05) influenced the beta diversity of fungi but not bacterial communities in the rhizosphere. Using our novel approach, it was expected and confirmed that fungal communities would shift and mycorrhizal genera (Glomus) would be altered, however, the degree to which community change was observed was more than expected. Glomeromycota (∼16.3%) related to the family Gigasporaceae accounted for 2.8% of OTU and were 2-3 times greater in the rhizosphere of high relative to medium and low Fe conditions. Overall, the results indicate that foliar addition of Fe influences plant Fe and resonates into the root system to affect rhizosphere fungal communities. Potato Fe status thus appears to impact potato root-fungal interactions potentially mediated through mycorrhizal fungi.

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Synergistic effects of Arbuscular mycorrhizal fungi and plant growth promoting rhizobacteria in bioremediation of iron contaminated soils

Cited by 93 publications

References 23 publications

Endophytic Microbial Consortia of Phytohormones-Producing Fungus Paecilomyces formosus LHL10 and Bacteria Sphingomonas sp. LK11 to Glycine max L. Regulates Physio-hormonal Changes to Attenuate Aluminum and Zinc Stresses

Endophytic Microbial Consortia of Phytohormones-Producing Fungus Paecilomyces formosus LHL10 and Bacteria Sphingomonas sp. LK11 to Glycine max L. Regulates Physio-hormonal Changes to Attenuate Aluminum and Zinc Stresses

A Review of Studies from the Last Twenty Years on Plant–Arbuscular Mycorrhizal Fungi Associations and Their Uses for Wheat Crops

Foliar application of Fe resonates to the belowground rhizosphere microbiome in Andean landrace potatoes

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