Potential proteolytic enzyme activities modulate archaeal and bacterial nitrifier abundance in soils differing in acidity and organic residue treatment

Balume, Isaac; Agumas, Birhanu; Musyoki, Mary K.; Marhan, Sven; Cadisch, Georg; Rasche, Frank

doi:10.1016/j.apsoil.2021.104188

Cited by 3 publications

(3 citation statements)

References 70 publications

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“…The buildup of protein in the environment will cause increased levels of ammonia which can be toxic to cultivated biota. However, the presence of proteolytic bacteria will break down protein compounds and synergize with nitrifying bacteria which will convert them into nitrites and nitrates so that they can be beneficial for the environment [15,58]. The potential and abilities of these bacteria continue to be developed by researchers in order to obtain environmentally friendly biotechnology products as bioremediation agents.…”

Section: Proteolytic Activity Index Of Bacteria In Rice-fish Farming ...mentioning

confidence: 99%

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Isolation and Screening of Proteolytic Bacteria from Rice-Fish Farming System Sediments

Riady,

Fitriadi,

Kasprijo

et al. 2024

IJDNE

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Section: Proteolytic Activity Index Of Bacteria In Rice-fish Farming ...mentioning

confidence: 99%

“…In the environment, proteolytic bacteria will break down organic compounds from the protein group so that they do not accumulate as ammonia which can pollute the aquatic environment [13]. In another study, proteolytic bacteria have a positive correlation and both play a role in bioremediation [14,15].…”

Section: Introductionmentioning

confidence: 97%

Isolation and Screening of Proteolytic Bacteria from Rice-Fish Farming System Sediments

Riady,

Fitriadi,

Kasprijo

et al. 2024

IJDNE

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“…Saline and alkaline stress reduced the number of AOB and reduced the preference of AOB for saline and alkaline environments [89]. Furthermore, in addition to soil acidity, the ecological niche specialization between AOA and AOB depends on the availability of nutrients from soil resources [90]. Soil proteases and β-glucosidases have been shown to be significantly correlated with soil-nutrient content [91], suggesting that AOB seems to be able to benefit soil nutrients better than AOA to ensure bacterial population growth.…”

Section: Cropping Patterns Ecological Niches Affect Nitrifying Bacter...mentioning

confidence: 99%

Different Cropping Patterns to Restore Saline-Alkali Soils in Northeast China Affect the Abundance of Functional Genes in the Soil Nitrogen Cycle

Ding

Sun³

et al. 2023

Sustainability

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Considerable attention has been paid to the establishment of an appropriate cropping patterns for the restoration of saline-alkali lands. This study’s goal was to explore changes in nitrogen-cycling (N-cycling) gene (nitrogen fixation: nifH; nitrification: AOA, AOB, and nxrB; denitrification: narG, norB, and nosZ) abundance of three cropping patterns at two soil depths in saline-alkali soils. Results showed that rotation and mixture promoted soil nutrients. N-cycling functional genes were significantly influenced by soil depths and cropping patterns. Compared with monoculture, rotation decreased the abundance of nifH, AOA, narG, and nosZ and increased the abundance of AOB; mixture decreased the abundance of AOA, narG, and nosZ and increased the abundance of AOB and nxrB in the 0–15 cm soil depth. Rotation increased all genes abundance; mixture increased nosZ abundance and decreased nxrB abundance in 15–30 cm soil depth. Soil protease, cellulase, nitrate reductase, pH, AK (available potassium), and AP (available phosphorus) were important factors influencing N-cycling gene abundance. In conclusion, rotation and mixture not only reduced soil salinity but also improved soil fertility and nitrogen cycling. These findings can provide some theories for the sustainable development of N-cycling during the restoration of saline-alkali soils.

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Interactive Effect of Residue Quality and Agroecologies Modulate Soil C‐ and N‐Cycling Enzyme Activities, Microbial Gene Abundance, and Metabolic Quotient

Agumas,

Agegnehu,

Feyisa

2024

Applied and Environmental Soil Science

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Understanding interactive effect of agroecology explained by rainfall, temperature, elevation, and biochemical composition of residues on soil microbial abundance and functions is crucial for unraveling soil ecological processes. This study aimed to investigate how agroecology and residue quality influence enzymatic activities, gene abundance, and metabolic quotient (qCO2). A field experiment was conducted using Leucaena leucocephala (LL) (high‐quality residue) and Acacia decurrens (AD) (low‐quality residue) in soils of highland and midland agroecologies. These residues differed in decomposability, characterized by a ratio of (lignin + polyphenol)/N of 5.0 for high‐quality residue versus 21.0 for low‐quality residue. Two experimental setups were employed: soil with litter mixture in polyvinyl chloride (PVC) tubes and residues buried in the surface soil using litterbags. Soil samples were collected after 30, 120, and 270 days of incubation and analyzed for biochemical properties, enzyme activities, and the abundance of nitrifying and total archaea and bacteria. Soil respiration was also measured at different intervals in the field. qCO2 was calculated using microbial biomass (MBC) and daily respiration (DCO2). Linear mixed model (P < 0.05) revealed that combined factors of agroecologies and residue qualities affected enzymatic activities, microbial abundance, soil properties, and qCO2. Agroecological differences exerted a greater influence than residue qualities. Positive and negative significant correlations (P < 0.05, r = 0.27 to 0.67) were found between different C and N pools as well as enzymatic activities. Positive correlations (P < 0.05) were observed between the abundance of total bacteria, total archaea, and ammonia‐oxidizing bacteria versus leucine‐aminopeptidases. qCO2 was influenced more by β‐xylosidase, leucine‐aminopeptidases, and thermolysin‐like neutral metalloproteases (TLP) than by β‐D‐glucosidase and β‐D‐cellobiohydrolase. Leucine‐aminopeptidases and TLP were identified as rate‐limiting factors for protein and peptide decomposition, while β‐xylosidase controlled hemicellulose degradation. In summary, this study provides insights into the intricate relationships between agroecology, residue quality, enzymatic activities, and microbial communities, shedding light on key processes governing soil ecological functions.

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Potential proteolytic enzyme activities modulate archaeal and bacterial nitrifier abundance in soils differing in acidity and organic residue treatment

Cited by 3 publications

References 70 publications

Isolation and Screening of Proteolytic Bacteria from Rice-Fish Farming System Sediments

Isolation and Screening of Proteolytic Bacteria from Rice-Fish Farming System Sediments

Different Cropping Patterns to Restore Saline-Alkali Soils in Northeast China Affect the Abundance of Functional Genes in the Soil Nitrogen Cycle

Interactive Effect of Residue Quality and Agroecologies Modulate Soil C‐ and N‐Cycling Enzyme Activities, Microbial Gene Abundance, and Metabolic Quotient

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