Phenolic acid-degrading Paraburkholderia prime decomposition in forest soil

ISME Communications, Год журнала: 2021, Номер 1(1)

Опубликована: Март 25, 2021

Abstract Plant-derived phenolic acids are catabolized by soil microorganisms whose activity may enhance the decomposition of organic carbon (SOC). We characterized whether acid-degrading bacteria SOC mineralization in forest soils when primed with 13C-labeled p-hydroxybenzoic acid (pHB). further tested pHB-induced priming could explain differences content among mono-specific tree plantations a 70-year-old common garden experiment. pHB addition significant losses (3–13 µmols C g−1 dry wt over 7 days) compared to glucose, which reduced (-3 -8 days). The principal degraders were Paraburkholderia and Caballeronia all regardless species or type, one predominant phylotype (RP11ASV) enriched 23-fold following peak respiration. isolated confirmed degrading strain matching this (RP11T), encoded numerous oxidative enzymes, including secretion signal-bearing laccase, Dyp-type peroxidase aryl-alcohol oxidase. Increased relative abundance RP11ASV corresponded higher respiration expression monooxygenase (pobA), was inversely proportional plantations. pobA proved responsive measure activity. found that stimulating phenolic-acid can prime activity, corresponding species, is potential mechanism cycling forests. Overall, study highlights ecology function associations plant roots capacity degrade phenolics suggest role for specialized effect.

Язык: Английский

---

An optimal combined slow-release nitrogen fertilizer and urea can enhance the decomposition rate of straw and the yield of maize by improving soil bacterial community and structure under full straw returning system

Frontiers in Microbiology, Год журнала: 2024, Номер 15

Опубликована: Июнь 19, 2024

Under a full straw returning system, the relationship between soil bacterial community diversity and decomposition, yield, combined application of slow-release nitrogen urea remains unclear. To evaluate these effects provide an effective strategy for sustainable agricultural production, 2-year field positioning trial was conducted using maize as research object. Six experimental treatments were set up: + no fertilizer (S1N0), fertilizer:urea = 0:100% (S1N1), 30%:70% (S1N2), 60%:40% (S1N3), 90%:10% (S1N4), removal (S0N2). Significant differences ( p < 0.05) observed Proteobacteria, Acidobacteriota, Myxococcota, Actinobacteriota at jointing stage; Bacteroidota, Gemmatimonadota tasseling Firmicutes, Methylomirabilota, Proteobacteria maturity stage. The alpha analysis showed that number operational taxonomic units (OTUs) Chao1 index higher in S1N2, S1N3, S1N4 compared with S0N2 each growth Additionally, measures S1N3 S1N2. beta communities more similar or closely clustered together, while further from all across three stages. cumulative decomposition rate tested treatment, data (90.58%) had highest rate. At phylum level, positively correlated Actinobacteriota, Bacteroidota but significantly negatively Acidobacteriota. PICRUSt2 function prediction results show relative abundance bacteria samples treatment differed significantly. yield 15597.85 ± 1477.17 kg/hm 2 , which 12.80 4.18% than S1N1 S0N2, respectively. In conclusion, combination can enhance by improving structure within system.

Язык: Английский

---

Trees First Inhibit Then Promote Litter Decomposition in the Subarctic

Ecology Letters, Год журнала: 2025, Номер 28(1)

Опубликована: Янв. 1, 2025

ABSTRACT Trees affect organic matter decomposition through allocation of recently fixed carbon belowground, but the magnitude and direction this effect may depend on substrate type stage. Here, we followed mass loss, chemical composition fungal colonisation leaf root litters incubated in mountain birch forests over 4 years, plots where belowground was severed by tree girdling or control plots. Initially, stimulated litter loss 12% 22%, respectively, suggesting competitive release saprotrophic when tree‐mediated competition ectomycorrhizal fungi eliminated (Gadgil effect). After instead hampered 30%, late‐stage priming presence trees, parallel with increased growth shrubs associated following elimination. Hence, different mechanisms driving early‐ should be considered climate‐feedback evaluations plant–soil interactions.

Язык: Английский

---

Enhancing soil multifunctionality through restoring erosion environment and microbial functions combined with organic manure and straw mulching

Agriculture Ecosystems & Environment, Год журнала: 2025, Номер 383, С. 109515 - 109515

Опубликована: Янв. 30, 2025

Язык: Английский

---

Soil Organic Carbon Formation from Plant and Microbial Residual Carbon: Effects of Home-Field Advantage and Substrate Quality

Опубликована: Янв. 1, 2025

Язык: Английский

---