Effect of Plant Root Exudate Constituents on the Degradation of Phenanthrene by the Rhizobacterium Mycolicibacterium gilvum (Mycobacteriaceae, Actinobacteria)

Panchenko, L. V.; Kuzyanov, D. A.; Плешакова, Е. В.; Pozdnyakova, N. N.; Muratova, A. Yu.; Turkovskaya, O. V.

doi:10.1134/s1062359022100284

Cited by 3 publications

(4 citation statements)

References 26 publications

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“…EC, OM, and TN in soil were significantly and positively correlated with Rhodanobacter , Rhizomicrobium , and Sphingomonas of Proteobacteria and Mycobacterium of Actinobacteria. Numerous genera within the Proteobacteria and Actinobacteria phyla have been demonstrated to promote plant growth directly or indirectly ( Yang et al, 2017 ; Kalntremtziou et al, 2023 ; Panchenko et al, 2023 ). Soil OM is the primary source of soil microbial carbon and nitrogen ( Floch et al, 2009 ).…”

Section: Discussionmentioning

confidence: 99%

Temporal and spatial changes in rhizosphere bacterial diversity of mountain Rhododendron mucronulatum

et al. 2023

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To better conserve the ecology of the wild Rhododendron mucronulatum range, we studied the rhizosphere microenvironment of R. mucronulatum in Beijing’s Yunmeng Mountain National Forest Park. R. mucronulatum rhizosphere soil physicochemical properties and enzyme activities changed significantly with temporal and elevational gradients. The correlations between soil water content (SWC), electrical conductivity (EC), organic matter content (OM), total nitrogen content (TN), catalase activity (CAT), sucrose-converting enzyme activity (INV), and urease activity (URE) were significant and positive in the flowering and deciduous periods. The alpha diversity of the rhizosphere bacterial community was significantly higher in the flowering period than in the deciduous period, and the effect of elevation was insignificant. The diversity of the R. mucronulatum rhizosphere bacterial community changed significantly with the change in the growing period. A network analysis of the correlations revealed stronger linkages between the rhizosphere bacterial communities in the deciduous period than in the flowering period. Rhizomicrobium was the dominant genus in both periods, but its relative abundance decreased in the deciduous period. Changes in the relative abundance of Rhizomicrobium may be the main factor influencing the changes in the R. mucronulatum rhizosphere bacterial community. Moreover, the R. mucronulatum rhizosphere bacterial community and soil characteristics were significantly correlated. Additionally, the influence of soil physicochemical properties on the rhizosphere bacterial community was larger than that of enzyme activity on the bacterial community. We mainly analyzed the change patterns in the rhizosphere soil properties and rhizosphere bacterial diversity of R. mucronulatum during temporal and spatial variation, laying the foundation for further understanding of the ecology of wild R. mucronulatum.

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Section: Discussionmentioning

confidence: 99%

Temporal and spatial changes in rhizosphere bacterial diversity of mountain Rhododendron mucronulatum

et al. 2023

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“…Moreover, the effects of root exudates like succinic acid and other polyphenolic substances like rutin (a flavonoid) were observed on the rhizospheric degradation of PHE by the bacteria Mycolicibacterium gilvum . The results demonstrated that both succinic acid and rutin stimulated the degradation of PHE by increasing the bacterial activity . However, it is worth noting that although some plant secondary metabolites can serve as growth substrates or inducers for metabolic pathways involved in aromatic compound degradation, the complexity of exudates means that each component may exert distinct effects on rhizospheric microbial metabolism, influenced by the structure of the PAHs …”

Section: Pahs Degradation In the Rhizosphere Of Plantsmentioning

confidence: 98%

“…The root exudates are rich in a variety of metabolites and enzymes. Leguminous plants such as alfalfa ( Medicago sativa ) secrete various enzymes, including tyrosinases, laccases, or peroxidases through their roots . Similarly, sorghum ( Sorghum bicolor) has been found to possess these enzymes as well .…”

Section: Uptake and Translocation And The Fate Of Pahs In Plantsmentioning

confidence: 99%

“…The results demonstrated that both succinic acid and rutin stimulated the degradation of PHE by increasing the bacterial activity. 116 However, it is worth noting that although some plant secondary metabolites can serve as growth substrates or inducers for metabolic pathways involved in aromatic compound degradation, the complexity of exudates means that each component may exert distinct effects on rhizospheric microbial metabolism, influenced by the structure of the PAHs. 193 Root exudates also actively participate in the degradation of organic pollutants by releasing a variety of enzymes, including laccases, peroxidases, cytochrome P450 monooxygenases, dehalogenases, etc., which transform organic xenobiotics.…”

Section: Microbial Degradation Of Pahs In Plantmentioning

confidence: 99%

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Transfer and Degradation of PAHs in the Soil–Plant System: A Review

Tarigholizadeh,

Sushkova,

Rajput

et al. 2023

J. Agric. Food Chem.

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Polycyclic aromatic hydrocarbons (PAHs) are highly toxic, persistent organic pollutants that threaten ecosystems and human health. Consistent monitoring is essential to minimize the entry of PAHs into plants and reduce food chain contamination. PAHs infiltrate plants through multiple pathways, causing detrimental effects and triggering diverse plant responses, ultimately increasing either toxicity or tolerance. Primary plant detoxification processes include enzymatic transformation, conjugation, and accumulation of contaminants in cell walls/vacuoles. Plants also play a crucial role in stimulating microbial PAHs degradation by producing root exudates, enhancing bioavailability, supplying nutrients, and promoting soil microbial diversity and activity. Thus, synergistic plant−microbe interactions efficiently decrease PAHs uptake by plants and, thereby, their accumulation along the food chain. This review highlights PAHs uptake pathways and their overall fate as contaminants of emerging concern (CEC). Understanding plant uptake mechanisms, responses to contaminants, and interactions with rhizosphere microbiota is vital for addressing PAH pollution in soil and ensuring food safety and quality.

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Interactions between plants and bacterial communities for phytoremediation of petroleum-contaminated soil

Zhong,

Yang,

et al. 2024

Environ Sci Pollut Res

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Effect of Plant Root Exudate Constituents on the Degradation of Phenanthrene by the Rhizobacterium Mycolicibacterium gilvum (Mycobacteriaceae, Actinobacteria)

Cited by 3 publications

References 26 publications

Temporal and spatial changes in rhizosphere bacterial diversity of mountain Rhododendron mucronulatum

Temporal and spatial changes in rhizosphere bacterial diversity of mountain Rhododendron mucronulatum

Transfer and Degradation of PAHs in the Soil–Plant System: A Review

Interactions between plants and bacterial communities for phytoremediation of petroleum-contaminated soil

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