Soil Amendments with Lignocellulosic Residues of Biorefinery Processes Affect Soil Organic Matter Accumulation and Microbial Growth

Savy, Davide; Mercl, Filip; Cozzolino, Vincenza; Spaccini, Riccardo; Cangemi, Silvana; Piccolo, Alessandro

doi:10.1021/acssuschemeng.9b07474

Cited by 13 publications

(8 citation statements)

References 62 publications

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“…Giant reed ( Arundo donax L.) was harvested at the Torre Lama experimental farm, located in Salerno (Italy), whereas miscanthus ( Miscanthus × giganteus Greef et Deuter) biomass was kindly provided by Phytatec Ltd (UK). Lignocellulosic biorefinery wastes were obtained from enzymatically treated giant reed as described previously 19‐21 …”

Section: Methodsmentioning

confidence: 99%

“…Lignocellulosic biorefinery wastes were obtained from enzymatically treated giant reed as described previously. [19][20][21] Lignin isolation was carried out as follows: 5.0 g of the various lignocellulosic materials was added to 150 mL of a 2% (w/w) aqueous solution of H 2 O 2 . The pH was brought to 11.5 by means of a 4 mol L −1 KOH solution and the mixture was shaken at 50 °C overnight.…”

Section: Methodsmentioning

confidence: 99%

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Valorization of lignins from energy crops and agro‐industrial byproducts as antioxidant and antibacterial materials

et al. 2021

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BACKGROUND Developing eco‐friendly antioxidant and antimicrobial substances originating from biomass residues has recently attracted considerable interest. In this study, two lignosulfonates and various oxidized water‐soluble lignins were investigated for their antioxidant properties, as assessed by ABTS, DPPH and Folin–Ciocalteu methods, and their antimicrobial activity against some bacterial strains responsible for human pathologies. RESULTS The lignosulfonates showed the largest antiradical/antimicrobial capacity, whereas the other substrates were less effective. The observed antioxidant/antibacterial properties were positively correlated with lignin aromatic/phenolic content. The positive correlation between antiradical and antimicrobial activities suggests that lignin scavenging capacity was also involved in its antibacterial activity. A greater antimicrobial performance was generally observed against Gram‐positive bacterial strains, and it was attributed to the intrinsic larger susceptibility of Gram‐positive bacteria to lignin phenols. A significant though lesser inhibitory activity was also found against Escherichia coli. CONCLUSION Our results confirmed the dependence of lignin antioxidant/antibacterial power on its extraction method and chemical structure, as well as on the type of bacterial strains. Identifying the relationship between lignin molecular composition and its antioxidant/antibacterial features represents an advance on the potential future use of renewable and eco‐compatible lignin materials in nutraceutical, pharmaceutical and cosmetic sectors. © 2021 Society of Chemical Industry.

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Section: Methodsmentioning

confidence: 99%

Section: Methodsmentioning

confidence: 99%

Valorization of lignins from energy crops and agro‐industrial byproducts as antioxidant and antibacterial materials

et al. 2021

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“…Even when the active ingredient is difficult to isolate, efforts are being made to find the purest active fractions. Thus, in the area of humic substances, it isnoteworthy that recently quantitative QSAR for humic substances has been reported ( Savy et al, 2020 ), but at the moment effects in plants have not been explored, remaining out of the aim of this review.…”

Section: Introductionmentioning

confidence: 99%

Pure Organic Active Compounds Against Abiotic Stress: A Biostimulant Overview

et al. 2020

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Biostimulants (BSs) are probably one of the most promising alternatives nowadays to cope with yield losses caused by plant stress, which are intensified by climate change. Biostimulants comprise many different compounds with positive effects on plants, excluding pesticides and chemical fertilisers. Usually mixtures such as lixiviates from proteins or algal extracts have been used, but currently companies are interested in more specific compounds that are capable of increasing tolerance against abiotic stress. Individual application of a pure active compound offers researchers the opportunity to better standarise formulations, learn more about the plant defence process itself and assist the agrochemical industry in the development of new products. This review attempts to summarise the state of the art regarding various families of organic compounds and their mode/mechanism of action as BSs, and how they can help maximise agricultural yields under stress conditions aggravated by climate change.

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“…The experiment included four treatments with each six replicates. OA was added to 80 g of soil (oven-dry weight) at a rate of 5 mg C g −1 soil ( Savy et al, 2020 ), and then pre-incubated at 25°C in dark for 30 days. N and P nutrients were provided according to C:N:P stoichiometric ratios (C:N: p = 10,000:833:200; Kirkby et al, 2013 ).…”

Section: Methodsmentioning

confidence: 99%

Organic amendments with high proportion of heterocyclic compounds promote soil microbiome shift and microbial use efficiency of straw-C

Lin

Zhang

et al. 2023

Front. Microbiol.

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Soil microbial use efficiency of straw carbon (C), which is the proportion of straw-C microbes assimilate into new biosynthetic material relative to C lost out of the system as CO2, is critical in increasing soil organic C (SOC) content, and hence maintaining soil fertility and productivity. However, the effect of chemical structures of the organic amendments (OAs) on the microbial use efficiency of straw-C remains unclear. The effect of the chemical structure of the OAs on microbial use efficiency of straw-C was elucidated by a combination of 13C-straw labeling with high-throughput sequencing and pyrolysis-GC/MS. We found a strong positive correlation between the microbial use efficiency of straw-C and the proportion of heterocyclic compounds (Hete_C). The microbial use efficiency of straw-C was highest in soil supplemented with Hete_C-dominant OAs, which significantly shifted microbial community structure toward fungal dominance. Specifically, fungal-to-bacterial ratio, fungal richness, and the relative abundance of Ascomycota were higher in soil with a higher proportion of Hete_C-dominant OAs. Together, our study suggests that OAs with high proportion of Hete_C promote the microbial use efficiency of straw-C by increasing the dominance of fungi in the soil microbial community in agroecosystems.

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Soil Amendments with Lignocellulosic Residues of Biorefinery Processes Affect Soil Organic Matter Accumulation and Microbial Growth

Cited by 13 publications

References 62 publications

Valorization of lignins from energy crops and agro‐industrial byproducts as antioxidant and antibacterial materials

Valorization of lignins from energy crops and agro‐industrial byproducts as antioxidant and antibacterial materials

Pure Organic Active Compounds Against Abiotic Stress: A Biostimulant Overview

Organic amendments with high proportion of heterocyclic compounds promote soil microbiome shift and microbial use efficiency of straw-C

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