Effect of bioaugmentation on the growth and rhizosphere microbiome assembly of hydroponic cultures of Mentha aquatica

Kalniņš, Mārtiņš; Andersone-Ozola, Una; Gudrā, Dita; Sieriņa, Alise; Fridmanis, Dāvids; Ievinsh, Gederts; Muter, Olga

doi:10.1016/j.egg.2021.100107

Cited by 7 publications

(6 citation statements)

References 38 publications

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“…The plant-species-specific effects could be explained by the following assumptions: (i) the phytoremediation potential for FA removal depends on distinct FA distribution in various parts of the plant, as well as the environmental conditions (light intensity, nutrients, substrate, etc. ); (ii) the differences in a rhizosphere's microbial community structure are dependent on the plant species regardless of FA exposure, plant-specific physiological response to FA, and physiological characteristics of the microbial community (FA resistance, degradation potential, shift in the community structure due to plant and microbial response to FA, expression of specific enzymes, e.g., the glutathione-dependent FA dehydrogenase) [17,34,36]. The use of bamboo and dracaena in botanical walls has shown a high effectiveness in FA reduction [37,38].…”

Section: Discussionmentioning

confidence: 99%

Formaldehyde Removal by Expanded Clay Pellets and Biofilm in Hydroponics of a Green Wall System

Žorža,

Ceļmalniece,

Sieriņa

et al. 2023

Sustainability

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Air pollution with formaldehyde (FA) has been an emerging concern over recent years. This study was aimed at evaluating the contribution of green wall system-derived expanded clay pellets (ECP) and biofilms to FA removal in liquid phase. The effects of four plant species on this process were compared. An inhibition of the fluorescein diacetate hydrolysis activity of biofilm-derived microorganisms was detected during the exposure to FA in both air and liquid phases, and this effect was plant-species-specific. Liquid chromatography with a UV detector was applied for the quantification of FA. The FA removal activity of ECP in the liquid phase was 76.5 mg ECP−1 after a 24 h incubation in the presence of 100 mg/L FA, while the removal activity of the biofilm differed depending on the plant species used, with the highest values detected in the set with Mentha aquatica, i.e., 59.2 mg ECP−1. The overall FA removal from the liquid phase during 24 h varied in the range from 63% to 82% with the initial FA concentration of 100 mg/L. Differences in biofilm formation upon ECP enrichment were detected by using confocal laser scanning microscopy. These results contribute to the understanding of air biofiltration mechanisms in hydroponic systems.

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Section: Discussionmentioning

confidence: 99%

Formaldehyde Removal by Expanded Clay Pellets and Biofilm in Hydroponics of a Green Wall System

Žorža,

Ceļmalniece,

Sieriņa

et al. 2023

Sustainability

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“…After the 47-day hydroponic greenhouse experiment, the structure of the bacterial communities attached to expanded clay pellets was represented mostly by Proteobacteria at the phylum level (80–90%). Bioaugmentation provided significant ( p < 0.05) stimulation for the growth of M. aquatica , although the metagenome analysis of the rhizosphere did not reveal any abundance of bacterial strains, which were introduced into the hydroponic media at the beginning of the experiment [ 12 ].…”

Section: Sources Of Microorganisms For Bioaugmentationmentioning

confidence: 99%

“…Bioaugmentation is a site-specific approach. Thus, recent research publications and reviews on bioaugmentation have focused on the following aspects: thermophilic reductive dechlorination [ 4 , 5 ]; the psychrophilic treatment of groundwaters [ 6 ]; microbially induced calcium carbonate precipitation techniques to mitigate the wind-induced erosion of calcareous desert sand [ 7 ]; hydrocarbon biodegradation in freshwater sediments from historically contaminated lakes [ 8 ]; the bacterial remediation of pesticide-polluted soils [ 3 ], emerging trends in the remediation of organic contaminated soils as a whole [ 9 ]; mechanisms of microbial activity in heavy metal removal [ 10 ]; comparisons of autochthonous and allochthonous bioaugmentation [ 11 ]; the stimulation of plant growth in bioaugmented hydroponic systems [ 12 ]; and the bioaugmentation of wastewaters (WWs) with yeast in the presence of antimicrobials [ 13 ], among others.…”

Section: Introductionmentioning

confidence: 99%

Current Trends in Bioaugmentation Tools for Bioremediation: A Critical Review of Advances and Knowledge Gaps

Muter

2023

Microorganisms

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Bioaugmentation is widely used in soil bioremediation, wastewater treatment, and air biofiltration. The addition of microbial biomass to contaminated areas can considerably improve their biodegradation performance. Nevertheless, analyses of large data sets on the topic available in literature do not provide a comprehensive view of the mechanisms responsible for inoculum-assisted stimulation. On the one hand, there is no universal mechanism of bioaugmentation for a broad spectrum of environmental conditions, contaminants, and technology operation concepts. On the other hand, further analyses of bioaugmentation outcomes under laboratory conditions and in the field will strengthen the theoretical basis for a better prediction of bioremediation processes under certain conditions. This review focuses on the following aspects: (i) choosing the source of microorganisms and the isolation procedure; (ii) preparation of the inoculum, e.g., cultivation of single strains or consortia, adaptation; (iii) application of immobilised cells; (iv) application schemes for soil, water bodies, bioreactors, and hydroponics; and (v) microbial succession and biodiversity. Reviews of recent scientific papers dating mostly from 2022–2023, as well as our own long-term studies, are provided here.

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“…Previous studies confirmed that the use of monoculturebased biofertilizers in hydroponic growth medium with reduced dosage of chemical fertilizers demonstrated higher yields and vegetative growth in squash, strawberries and banana (Dagsan et al, 2012;Rueda et al, 2016;Mia et al, 2010). Kalniņš et al (2022) showed the bioaugmentation of bacterial consortia provided significant stimulation for the growth of Mentha aquatica var. aquatica and Mentha aquatica var.…”

Section: Vegetative Growthmentioning

confidence: 99%

Intimate interactions of <em>Enterobacter, Aspergillus</em> and <em>Enterobacter-Aspergillus</em> biofilm with strawberry, tomato and rice: early plant growth under glass house conditions

2022

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The host specificity of biofertilizers poses many challenges at large scale production and usage. The present study investigated the versatility of a fungal-bacterial biofilmed biofertilizer (FBB) in comparison to its monoculture bacterial (BB) and fungal (FB) biofertilizers using three crops. The FBB was formulated using selected strawberry (Fragaria ananassa) rhizosphere-associated bacterial (Enterobactor sp.) and fungal (Aspergillus sp.) strains. Strawberry, rice and tomato were grown in hydroponics under similar conditions and the liquid biofertilizers (FBB, BB and FB) were applied at a ratio of biofertilizer: hydroponic medium in 1:90 (in volume). A control was maintained without any biofertilizers. The treatments were triplicated and arranged according to completely randomized design. The growth medium collected at different time intervals were analyzed for polysaccharides, amides and lipids by Fourier Transform Infrared (FTIR) spectroscopy. Plant height and dry mass were recorded after a month. Data were analyzed by ANOVA and correlation. After 30 days, root-FBB interactions of all three crops observed significantly improved polysaccharides, amides and fatty acids concentrations in the hydroponic medium over the control. Total plant biomass and height of strawberry and rice were significantly (p < 0.05) increased with FBB over its monoculture biofilms (BB, FB) and the control. In tomato, FBB-treated seedlings showed an improved growth over their counterparts treated with monoculture biofertilizers, though the differences were not significant (p > 0.05). The growth of strawberry and rice showed a significant (p < 0.05) positive correlation with functional polysaccharides and amides, while tomato showed a similar correlation with all three functional biomolecules tested. The findings clearly indicate that the FBB developed from strawberry root-associated microbes nullify the crop specificity, and show the potential to improve growth of rice and tomato. Therefore, mixed-culture biofertilizers seem to possess a universal potential in improving crop growth in comparison to conventional monoculture biofertilizers. Further studies with other crops are imperative to confirm their potential universality.

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Effect of bioaugmentation on the growth and rhizosphere microbiome assembly of hydroponic cultures of Mentha aquatica

Cited by 7 publications

References 38 publications

Formaldehyde Removal by Expanded Clay Pellets and Biofilm in Hydroponics of a Green Wall System

Formaldehyde Removal by Expanded Clay Pellets and Biofilm in Hydroponics of a Green Wall System

Current Trends in Bioaugmentation Tools for Bioremediation: A Critical Review of Advances and Knowledge Gaps

Intimate interactions of <em>Enterobacter, Aspergillus</em> and <em>Enterobacter-Aspergillus</em> biofilm with strawberry, tomato and rice: early plant growth under glass house conditions

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