Changes in the composition and properties of humic acids under the influence of microorganisms

Chistyakov, I. V.; Trofimov, S. Ya.; Лысак, Л. В.; Степанов, А. А.

doi:10.3103/s0147687413010031

Cited by 2 publications

(3 citation statements)

References 5 publications

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“…The HA structures were in the form of aromatic C, aliphatic C and small-molecule carbohydrates, among these forms, aromatic C accounted for the largest fraction, and its utilization depended on the degradation capacity of HA-degrading bacteria. Some studies (Filip, Tesařová, 2004;Chistyakov et al, 2013) had shown that the aromatic C structure of HA exhibited a strong resistance to degradation and was difficult for microbes to use, which agreed with the present study. Moreover, small-molecular aliphatic compounds and polysaccharides accounted for a small fraction and could be easily utilized by HA-degrading microorganisms and, thus, were ideal C sources.…”

Section: Figure 2 Carbon Respiration (Cr) Dynamics Of Different Treasupporting

confidence: 82%

“…Structural characteristics of HA restricted its degradation (Yanagi et al, 2002;Chistyakov et al, 2013). The HA structures were in the form of aromatic C, aliphatic C and small-molecule carbohydrates, among these forms, aromatic C accounted for the largest fraction, and its utilization depended on the degradation capacity of HA-degrading bacteria.…”

Section: Figure 2 Carbon Respiration (Cr) Dynamics Of Different Treamentioning

confidence: 99%

“…HA shows a close relationship with soil microorganisms. Aliphatic C and small-molecule carbohydrates contained in the HA structure as well as C and nitrogen (N) in the side chains of aromatic rings provide C and N sources for microbial metabolism (Chistyakov et al, 2013). The HA degradation rate is affected by the functional group composition of the HA structure (Guo et al, 2013).…”

Section: Introductionmentioning

confidence: 99%

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Degradation capacity of humic acids-degrading bacteria on humic acids extracted from arable soil

Fu¹,

Liu²,

Chang³

et al. 2017

Zemdirbyste-Agriculture

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The aim of the present experiment was to determine the degradation level of humic acids (HA) extraced from arable soil by three selected strains. A short-term experiment was carried out in 2014 at State Key Laboratory of Crop Stress Biology for Arid Areas, Northwest A&F University. HA was extracted from arable soil and was used as the sole carbon (C) and nitrogen (N) source in solid culture medium. Three soil HA-degrading strainsBacillus licheniformis (strain 1), Microbacterium resistens (strain 2) and Stenotrophomonas maltophilia (strain 3), were chosen to further investigate their individual and combined effects on the C degradation rate and structural properties of humic acids in the medium. The experiment included seven treatments: T1, T2, T3, T1+T2, T1+T3, T2+T3 and T1+T2+T3. Results showed that the total colony-forming units (CFU) of S. maltophilia (strain 3) showed higher amount in the treatments it was associated with. Carbon respiration (CR) and microbial biomass carbon (MBC) in various treatments varied between 4.04 (T2) to 12.13 (T2+T3) mg dish -1 and 1.32 (T2) to 4.96 (T3) mg dish -1 , in terms of the C degradation rates in humic acids, the sum of CR and MBC, followed the trend T2+T3 (52.05%) > T1+T3 (49.29%) > T1 (44.25%) > T3 (40.61%) > T1+T2 (38.39%) > T1+T2+T3 (37.09%) > T2 (18.91%). Infrared spectroscopy revealed that medium of all treatments resulted in higher levels of carbohydrate, aliphatic compounds, alcohols and nitrogenous substances after degradation process. T1 exhibited the lowest aromatic C content compared with the content before degradation, while that in T1+T2+T3 was the highest. Thus, B. licheniformis (strain 1) might have a relatively strong degradation capacity for aromatic C.

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Section: Figure 2 Carbon Respiration (Cr) Dynamics Of Different Treasupporting

confidence: 82%

Section: Figure 2 Carbon Respiration (Cr) Dynamics Of Different Treamentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Degradation capacity of humic acids-degrading bacteria on humic acids extracted from arable soil

Fu¹,

Liu²,

Chang³

et al. 2017

Zemdirbyste-Agriculture

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Application of humic substances in the remediation of heavy-metal-polluted soils of the Subarctic Zone of the Kola Peninsula

Tregubova

Копцик

Степанов

et al. 2017

Moscow Univ. Soil Sci. Bull.

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Changes in the composition and properties of humic acids under the influence of microorganisms

Cited by 2 publications

References 5 publications

Degradation capacity of humic acids-degrading bacteria on humic acids extracted from arable soil

Degradation capacity of humic acids-degrading bacteria on humic acids extracted from arable soil

Application of humic substances in the remediation of heavy-metal-polluted soils of the Subarctic Zone of the Kola Peninsula

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