Implications of mycoremediated dry olive residue application and arbuscular mycorrhizal fungi inoculation on the microbial community composition and functionality in a metal-polluted soil

García‐Sánchez, Mercedes; Cajthaml, Tomáš; Filipová, Alena; Tlustoš, Pavel; Száková, Jiřina; García-Romera, Inmaculada

doi:10.1016/j.jenvman.2019.05.101

Cited by 14 publications

(13 citation statements)

References 57 publications

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“…The inoculation of F. mosseae had an ambiguous impact on microbial abundances since Gram− bacteria and fungal populations were positively affected, in contrast with the decline found in Gram+ bacteria and Actinobacteria groups. This suppressive effect has been already reported by García-Sánchez et al 28 . The reason for this effect may be the production of antagonistic metabolites by AM fungal exudates, as it has been reported for Glomus sp.…”

Section: Discussionsupporting

confidence: 84%

“…Additionally, F. mosseae inoculation led to a significant increase in AMF hyphal density (as demonstrated by increased EE-GRSP contents 36 ), which would have benefited the stability of soil aggregates and had a beneficial effect on β-glucosidase. Thereby, combining DOR-based biochar and AMF inoculation may result in a synergistic effect based on the high C-substances input supplied by adding DOR-based biochar along with the better stability of soil aggregates provided by AMF 24 , 28 , 37 . This result might also suggest that F. mosseae stimulates indirectly the microbial activity by changing the patterns of root exudates, as previously reported 38 .…”

Section: Discussionmentioning

confidence: 99%

“…In our study, although NLFA AMF contents increased after the application of DOR-based biochar, neither levels of EE-GRSP in soil nor percentages of AMF root colonization were higher after soil application of DOR-based biochar. A possible explanation for this contradictory result may be that the susceptibility of plant roots to be colonized depends on the plant species, as some authors have suggested 20 , 28 . This argument could also explain the lack of a positive correlation between AMF root colonization and soil contents of NLFA AMF or EE-GRSP in our experiment.…”

Section: Discussionmentioning

confidence: 99%

“…The AM fungus used in this experiment was Funneliformis mosseae (formerly named as Glomus mosseae ) due to its resistance and adaptation to metal-contaminated soils as our previous studies showed 15 , 28 . The mycorrhizal inoculum was a mixture of rhizosphere soil containing spores, hyphae and mycorrhizal root fragments.…”

Section: Methodsmentioning

confidence: 99%

“…In this context, it has been hypothesized that the conversion of DOR into biochar may improve the capabilities of DOR to keep metals bound to a higher extent. Additionally, soil application of fungal transformed-DOR in combination with AMF is a viable practice to restore microbial functionality and biomass in soils chronically contaminated with metals 28 . Integrative studies assessing the potential of DOR-based biochar along with AMF application to reduce the bioavailability of metals and to enhance the activity and abundance of microbial communities in chronically metal polluted soils are missing.…”

Section: Introductionmentioning

confidence: 99%

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Application of dry olive residue-based biochar in combination with arbuscular mycorrhizal fungi enhances the microbial status of metal contaminated soils

Siles

García-Romera

Cajthaml

et al. 2022

Sci Rep

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Biochar made-up of dry olive residue (DOR), a biomass resulting from the olive oil extraction industry, has been proposed to be used as a reclamation agent for the recovery of metal contaminated soils. The aim of the present study was to investigate whether the soil application of DOR-based biochar alone or in combination with arbuscular mycorrhizal fungi (AMF) leads to an enhancement in the functionality and abundance of microbial communities inhabiting metal contaminated soils. To study that, a greenhouse microcosm experiment was carried out, where the effect of the factors (i) soil application of DOR-based biochar, (ii) biochar pyrolysis temperature (considering the variants 350 and 500 °C), (iii) soil application dose of biochar (2 and 5%), (iv) soil contamination level (slightly, moderately and highly polluted), (v) soil treatment time (30, 60 and 90 days) and (vi) soil inoculation with Funneliformis mosseae (AM fungus) on β-glucosidase and dehydrogenase activities, FA (fatty acid)-based abundance of soil microbial communities, soil glomalin content and AMF root colonization rates of the wheat plants growing in each microcosm were evaluated. Biochar soil amendment did not stimulate enzyme activities but increased microbial abundances. Dehydrogenase activity and microbial abundances were found to be higher in less contaminated soils and at shorter treatment times. Biochar pyrolysis temperature and application dose differently affected enzyme activities, but while the first factor did not have a significant effect on glucosidase and dehydrogenase, a higher biochar dose resulted in boosted microbial abundances. Soil inoculation with F. mosseae favored the proliferation of soil AMF community and increased soil glomalin content as well as rates of AMF root colonization. This factor also interacted with many of the others evaluated to significantly affect soil enzyme activities, microbial abundances and AMF community. Our results indicate that the application of DOR-based biochar along with AMF fungi is an appropriate approach to improve the status of microbial communities in soils with a moderate metal contamination at short-term.

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Section: Discussionsupporting

confidence: 84%

Section: Discussionmentioning

confidence: 99%

Section: Discussionmentioning

confidence: 99%

Section: Methodsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 3 more Smart Citations

Application of dry olive residue-based biochar in combination with arbuscular mycorrhizal fungi enhances the microbial status of metal contaminated soils

Siles

García-Romera

Cajthaml

et al. 2022

Sci Rep

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Plant–soil interactions in the native range of two congeneric species with contrasting invasive success

et al. 2023

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The aim of this study was to compare plant–soil interactions in the native range of two congeneric European species differing in their invasive success in the world: a globally invasive Cirsium vulgare and non-invasive C. oleraceum. We assessed changes in soil nutrients and soil biota following soil conditioning by each species and compared performance of plants grown in self-conditioned and unconditioned soil, from which all, some or no biota was excluded. The invasive species depleted more nutrients than the non-invasive species and coped better with altered nutrient levels. The invasive species had higher seedling establishment which benefited from the presence of unconditioned biota transferred by soil filtrate. Biomass of both species increased in soil with self-conditioned soil filtrate and decreased in soil with self-conditioned whole-soil inoculum compared to unconditioned filtrate and inoculum. However, the increase was smaller and the decrease greater for the invasive species. The invasive species allocated less biomass to roots when associated with harmful biota, reducing negative effects of the biota on its performance. The results show that in the native range the invasive species is more limited by self-conditioned pathogens and benefits more from unconditioned mutualists and thus may benefit more from loss of effectively specialized soil biota in a secondary range. Our study highlights the utility of detailed plant-soil feedback research in species native range for understanding factors regulating species performance in their native range and pinpointing the types of biota involved in their regulation.

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Plant genus is a better predictor of plant effects on soil biotic and abiotic properties than plant invasion status

Hanzelková,

Florianová,

Cajthaml

et al. 2023

Biol Invasions

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Increasing evidence suggests that plant invasions are promoted by altered plant-soil interactions. However, we still lack studies exploring differences in the effects of invasive and native species on soil properties, and particularly studies that would control for species phylogeny and abundance. Here, we grew seven congeneric pairs of invasive and native species with comparable cover in the studied region in a 12-weeks garden experiment. We analysed the amount of nutrients, pH and composition and amount of soil biota in soils cultivated by each species and in uncultivated soil. Then we used ratios of the soil characteristics in cultivated and uncultivated soil to express species effects on the soil.Invasive species used more phosphorus from the soil and supported mycorrhizal communities with higher potential to colonize plant roots than native species, but did not differ in any other soil properties. In contrast, we found strong differences among plant genera and genera from the same families tended to cluster together in their effects on the soil. We also found many interactions of genera and invasion status. Effects of plants on the soil were also largely determined by plant biomass production independent of species identity.The results suggest that invasive and native species differ only in a few general effects on the soil and that the differences among native and invasive species are largely genus speci c. They also indicated that species phylogenetic identity and individual plant biomass should be considered in future studies of the effect of plants on the soil.

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Implications of mycoremediated dry olive residue application and arbuscular mycorrhizal fungi inoculation on the microbial community composition and functionality in a metal-polluted soil

Cited by 14 publications

References 57 publications

Application of dry olive residue-based biochar in combination with arbuscular mycorrhizal fungi enhances the microbial status of metal contaminated soils

Application of dry olive residue-based biochar in combination with arbuscular mycorrhizal fungi enhances the microbial status of metal contaminated soils

Plant–soil interactions in the native range of two congeneric species with contrasting invasive success

Plant genus is a better predictor of plant effects on soil biotic and abiotic properties than plant invasion status

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