Applied Soil Ecology最新文献

{"title":"Community structure and selected genes abundance shift of rhizosphere and endophyte bacteria from roots associated with the sludge application under reclaimed water irrigation","authors":"Bingjian Cui ,&nbsp;Haishu Sun ,&nbsp;Erping Cui ,&nbsp;Chao Hu ,&nbsp;Xiangyang Fan ,&nbsp;Zhongyang Li ,&nbsp;Chuncheng Liu","doi":"10.1016/j.apsoil.2025.106070","DOIUrl":"10.1016/j.apsoil.2025.106070","url":null,"abstract":"<div><div>Reclaimed water and sewage sludge as renewable resources are urged to be used in agriculture, but their reuse poses potential chemical and microbiological risks. As a waste biomass resource, sludge combined with reclaimed water irrigation is a major way to develop and utilize renewable resources and control environmental pollution. However, whether reclaimed water irrigation and sludge application have adverse effects on the agricultural environment and human health remains a controversial point of discussion. A greenhouse pot experiment was conducted to investigate the effects of reclaimed water and sewage sludge on rhizosphere soil and root endophytic bacterial communities, the abundance of selected genes, and to evaluate the soil quality of sludge application. The results of this study demonstrated that the application of sewage sludge could result in the accumulation of nutrients in soil. The rhizosphere soil and root endophytic bacteria possessed common dominant groups at phylum level, including Proteobacteria, Bacteroidota, Actinobacteriota and Chloroflexi. Reclaimed water irrigation had less effect on rhizosphere soil and root endophytic bacterial communities than sludge application. <em>Pseudomonas</em> showed a decrease in relative abundance in both rhizosphere soil and root endophytes following sludge application, whereas beneficial bacteria like <em>Bacillus</em>, <em>Stenotrophobacter</em>, <em>Cellvibrio</em> and <em>Altererythrobacter</em> experienced an increase. Redundancy analysis (RDA) showed that the diversity and composition of bacterial communities in rhizosphere soil among treatment groups were closely related to soil organic matter, total nitrogen and total phosphate contents. The functional prediction highlighted the participation of functional groups in nitrogen and carbon cycling as well as degradation processes at varying sludge application rates. The abundance of selected genes was more affected by sludge application. A considerable amount of sludge application to the soil resulted in a significant increase in the abundance of pathogens and antibiotic resistance genes, as well as functional genes, compared to unamended soil with sludge treatment. Direct or excessive application of sludge might aggravate the dissemination and accumulation of deleterious genes in soil-crop systems irrigated with reclaimed water. Overall, our study results may provide valuable information on how sludge influences the microbial community characteristics and abundance of specific genes, guiding the assessment of biological quality and the appropriate use of sludge in agriculture irrigated with reclaimed water.</div></div>","PeriodicalId":8099,"journal":{"name":"Applied Soil Ecology","volume":"210 ","pages":"Article 106070"},"PeriodicalIF":4.8,"publicationDate":"2025-04-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143800535","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"农林科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Changes of microbial turnover and plant uptake of soil amino acids during conversion of a natural forest to a spruce plantation on the eastern Tibetan plateau, China","authors":"Ziliang Zhang ,&nbsp;Bartosz Adamczyk ,&nbsp;Huajun Yin","doi":"10.1016/j.apsoil.2025.106085","DOIUrl":"10.1016/j.apsoil.2025.106085","url":null,"abstract":"<div><div>It is well recognized that amino acids play an important role in soil nitrogen (N) cycling and contribute to plant N supply in forests. Land-use change is likely to alter soil amino- acid cycling and the role of amino acids in plant nutrition by influencing multiple abiotic and biotic factors, which, however, remains poorly understood. Here, by using ¹⁵N labeling methods, we quantified effects of land-use change from a natural forest to a spruce plantation on the uptake and turnover of amino acids by soil microbes, as well as trees' ability to take up amino acids on eastern Tibetan, China. Forest conversion from the natural forest to the spruce plantation significantly decreased soil inorganic N availability and N transformation rates, while increased the ratio of amino acids to inorganic N concentration. A soil incubation experiment with ¹⁵N-labeled-glycine addition in the laboratory showed that forest conversion inhibited gross consumption of amino acids and facilitated recycling of amino acids within microbial biomass. Furthermore, an in situ ¹⁵N-labeling experiment revealed that forest conversion significantly increased the contribution of soil amino acids to the total N uptake by plants, which was attributed to the increased proportion of amino acids in soil available N pools. Collectively, our results demonstrated that forest conversion from natural forests to plantations impacted turnover of amino acids by soil microbes, which consequently influenced plant uptake of amino acids. Our study further highlights the important role of amino acids as a N source for subalpine coniferous plantations and has implications for formulating management practices to maintain long-term productivity and stability of plantations.</div></div>","PeriodicalId":8099,"journal":{"name":"Applied Soil Ecology","volume":"210 ","pages":"Article 106085"},"PeriodicalIF":4.8,"publicationDate":"2025-04-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143800536","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"农林科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Earthworms regulate the response of greenhouse gas emissions in wetland soils to simulated warming and flooding","authors":"Mingzhu Lu ,&nbsp;Wenzhi Liu ,&nbsp;Lei Fan ,&nbsp;Haitao Wu","doi":"10.1016/j.apsoil.2025.106074","DOIUrl":"10.1016/j.apsoil.2025.106074","url":null,"abstract":"<div><div>Wetlands are a significant source of greenhouse gases (GHGs) and provide crucial habitats for soil invertebrates. Climate change, including warming and increased flooding, has considerably altered the exchange of GHGs between wetland soils and the atmosphere. However, whether and how soil fauna regulates the impacts of climate change on GHGs remains obscure. Herein, we conducted a 58-day microcosm incubation of wetland soils at two temperatures (20 and 25 °C) and two soil moisture levels (90 % and 135 % water-filled pore space) to investigate how earthworms (<em>Eisenia fetida</em>) regulate the direction and magnitude of GHG (CO₂, CH₄, and N₂O) responses to simulated warming and flooding scenarios. Results showed that warming increased emissions of all three GHGs, whereas flooding increased CH₄ emissions but suppressed CO₂ and N₂O emissions. Earthworms changed these response patterns by interacting with temperature and soil moisture conditions. Earthworms mitigated the positive effects of warming on CO₂ and N₂O but strengthened the positive influences of warming on CH₄, and they converted the negative response of CO₂ to flooding to positive but did not change the response of CH₄ and N₂O to flooding. In addition, Hierarchical partitioning analysis revealed that soil nitrogen availability (including NH₄⁺-N, NO₃⁻-N, and water-soluble nitrogen) and soil aggregates are the dominant factors driving the response of GHG emissions to earthworm activities and climate change. Overall, our findings highlight the crucial role of soil fauna in regulating GHG responses to warming and flooding in wetland soils, with significant implications for climate change mitigation.</div></div>","PeriodicalId":8099,"journal":{"name":"Applied Soil Ecology","volume":"210 ","pages":"Article 106074"},"PeriodicalIF":4.8,"publicationDate":"2025-04-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143800534","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"农林科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Enhancing banana health with key antagonistic taxa by crop residue-driven strategies","authors":"Shan Hong ,&nbsp;Xianfu Yuan ,&nbsp;Zhongjun Jia ,&nbsp;Yunze Ruan","doi":"10.1016/j.apsoil.2025.106046","DOIUrl":"10.1016/j.apsoil.2025.106046","url":null,"abstract":"<div><div>Panama disease (<em>Fusarium</em> wilt of banana), which is caused by <em>Fusarium oxysporum</em> f. sp. <em>cubense</em> tropical race 4 (<em>Foc</em>TR4), is the most devastating threat to banana production. The retention of crop residues enhances disease suppression in banana rotation systems. We performed quantitative PCR and MiSeq sequencing to investigate the effects of crop residues on soil microbial communities and to assess the suppressive impacts of residue extracts on <em>Foc</em>TR4. Pepper and eggplant residues significantly reduced Panama disease incidence (DI) and <em>Foc</em>TR4 abundance. The incorporation of pepper residue as a soil amendment reduced the DI to &lt;20 % in the second pot experiment, indicating sustained disease suppression. Residue extracts confirmed the residue inhibitory effects. The pepper and eggplant residues increased the bacterial copy number and decreased the fungal copy number in the amended soil. Pepper residues enhanced soil microbial richness and diversity more than eggplant and banana residues did. The microbial communities of the pepper and eggplant residues were similar but distinct from those of the banana residues and controls, with differences between the rhizosphere and bulk soil communities. Structural equation modeling identified available phosphorus as a key mediator linking residue inputs to pathogen suppression via the enrichment of key soil taxa. Pepper (OTU180_<em>Rhizomicrobium</em>) and eggplant (OTU187_<em>Gp4</em>) residues promoted key microbes, exerted antagonistic effects on <em>Foc</em>TR4, and reduced DI. Overall, these findings establish crop residue management as an effective strategy for sustainable banana cultivation, thus overcoming continuous cropping challenges through key taxa-mediated disease suppression.</div></div>","PeriodicalId":8099,"journal":{"name":"Applied Soil Ecology","volume":"210 ","pages":"Article 106046"},"PeriodicalIF":4.8,"publicationDate":"2025-04-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143800537","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"农林科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Functional and taxonomic biogeographical patterns of carbon-cycling microbial communities in farmland ecosystems of Shaanxi Province, China","authors":"Pengfei Li ,&nbsp;Zirong Kong ,&nbsp;Yiwei Bai ,&nbsp;Wenjiang Fu ,&nbsp;Yulong Li ,&nbsp;Qiao Guo ,&nbsp;Hangxian Lai","doi":"10.1016/j.apsoil.2025.106092","DOIUrl":"10.1016/j.apsoil.2025.106092","url":null,"abstract":"<div><div>Despite the critical role of microorganisms in soil carbon cycling, studies on the biogeography and assembly of carbon cycling functional traits and taxonomic groups in farmland ecosystems remain limited. Here, we collected soil from typical crop-growing areas in Shaanxi Province, China, including rapeseed (southern Shaanxi), wheat (Guanzhong area), and potato (northern Shaanxi) fields, to explore the distribution, assembly, and influencing factors of soil carbon-cycling microbial communities in farmland ecosystems. Distance-decay relationships were observed for both functional traits and taxonomic groups. Latitudinal diversity gradients were prominent for taxonomic groups but scarce for functional traits. The effects of environmental variables on functional and taxonomic community composition were slightly more influential than those of geographic distance. Functional traits and taxonomic groups are shaped by the same set of environmental factors, primarily mean annual temperature and precipitation, and soil pH. Neutral community and null model analyses demonstrated that stochastic processes predominantly governed the assembly of functional and taxonomic communities. Mean annual precipitation, functional trait composition, and microbial community composition also prominently affected the assembly of functional and taxonomic communities. Untargeted metabolomics identified strong associations between key carbon-cycling microbial taxa (e.g., Acidobacteria, Verrucomicrobia, and Gemmatimonadetes) and soil metabolite accumulation, including positive correlations with lipids, saccharides, and alcohols. The results broaden our understanding of microbially-driven soil carbon cycling. The findings underscore the need to consider both functional and taxonomic dimensions when managing soil microbiome-mediated carbon sequestration in agroecosystems.</div></div>","PeriodicalId":8099,"journal":{"name":"Applied Soil Ecology","volume":"210 ","pages":"Article 106092"},"PeriodicalIF":4.8,"publicationDate":"2025-04-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143800127","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"农林科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Analysis of the effect and mechanism of heavy metals in stabilized landfill humus soil using fly ash-based materials","authors":"Jianying Fu ,&nbsp;Yuyuan Pu ,&nbsp;Songwei Shi ,&nbsp;Junke Zhang ,&nbsp;Shuang Cao ,&nbsp;Xu Xu ,&nbsp;Wentao Jiao ,&nbsp;Mingxiu Zhan","doi":"10.1016/j.apsoil.2025.106090","DOIUrl":"10.1016/j.apsoil.2025.106090","url":null,"abstract":"<div><div>With the increasing excavation of landfills, the safe disposal of humus soil contaminated with heavy metals has become an urgent environmental challenge. This study developed a novel fly ash-based material (PHB-FA), modified with potassium dihydrogen phosphate, humic acid, and biochar, to enhance the stabilization of heavy metals in landfill humus soil. Compared to unmodified fly ash, PHB-FA significantly improved stabilization efficiency due to its optimized composition and enlarged surface area. At the optimized mass ratio of KH₂PO₄:HA:BC (4.7:1.0:3.0) and a dosage of 5 %, PHB-FA reduced the leaching toxicity of Cd, Zn, and Pb in prepared humus soil by 87.60 %, 92.36 %, and 99.76 %, respectively. The transformation of heavy metals from exchangeable to more stable residual forms markedly decreased ecological risks. Mechanism analysis revealed that pozzolanic reactions produced stable hydration products (AFt and C-(A)-S-H), while metal phosphate precipitation further minimized heavy metal leaching. Finally, PHB-FA was applied to actual landfill humus soil, effectively reducing leachable heavy metal concentrations to within regulatory limits. These findings demonstrate the superior performance and long-term stability of PHB-FA in heavy metal stabilization. The material shows great potential for large-scale landfill applications, offering environmental benefits and engineering feasibility for the resource utilization and safe disposal of contaminated humus soil.</div></div>","PeriodicalId":8099,"journal":{"name":"Applied Soil Ecology","volume":"210 ","pages":"Article 106090"},"PeriodicalIF":4.8,"publicationDate":"2025-04-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143800131","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"农林科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Divergent effects of biomass-derived carbon dots application and sweetpotato planting on accumulations of soil microbial necromass carbon in Vertisol","authors":"Jing Wang,&nbsp;Meng Zhu,&nbsp;Xiaoya Zhu,&nbsp;Qiangqiang Zhang,&nbsp;Yongchao Yu,&nbsp;Peng Zhao,&nbsp;Ming Liu,&nbsp;Rong Jin,&nbsp;Zhonghou Tang","doi":"10.1016/j.apsoil.2025.106061","DOIUrl":"10.1016/j.apsoil.2025.106061","url":null,"abstract":"<div><div>Biomass-derived nano carbon dots (CDs) application and sweetpotato (SP) planting can alter soil microbial community structure. However, the impact of these treatments on soil microbial necromass carbon (MNC) and associated mechanisms remains unclear. In this study, we combined pot experiments and laboratory analyses to assess soil physicochemical properties, microbial community characteristics, metabolic enzyme activity and multivariate correlations, aiming to explore the determinants of soil MNC accumulation in Vertisol following CDs application and SP planting. The results showed inconsistent effects of CDs application on soil bacterial and fungal necromass C content. Although CDs application increased bacterial richness and the relative abundances of Proteobacteria, Firmicutes and Cyanobacteria in the absence of SP planting, it failed to enhance bacterial necromass C accumulation. In contrast, CDs application improved soil fungal necromass C content regardless of SP planting. Besides directly increasing soil organic carbon (SOC) concentrations, both CDs application and SP planting enhanced the contributions of fungal necromass C to SOC. However, SP planting neither increased soil dissolved organic carbon (DOC) nor altered the compound contents in DOC solution. Extracellular enzymes related to C-cycling (e.g., β-α-cellobiohydrolase and β-1,4-xylosidase) also significantly diminished under SP planting without CDs application. Linear discriminant analysis (LDA) identified distinct bacterial and fungal genera between the CDs application and SP planting treatments. Structural equation models (SEMs) revealed that the reduced accumulation of bacterial necromass C was primarily driven by increased β-1,4-glucosidase activity and shifted in bacterial community composition, which limited microbial substrate utilization and growth. The increased fungal necromass C accumulation was attributed to altering fungal community structure and decreasing α-diversity, which promoted necromass formation through sequential assimilation, synthesis, and turnover of CDs and SP carbon inputs. These results highlight the differential responses of bacterial and fungal necromass accumulation to CDs application and SP planting, providing novel insights into the regulatory roles of nano CDs and plant-microbe interactions in SOC sequestration processes in Vertisol.</div></div>","PeriodicalId":8099,"journal":{"name":"Applied Soil Ecology","volume":"210 ","pages":"Article 106061"},"PeriodicalIF":4.8,"publicationDate":"2025-04-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143800128","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"农林科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Mulching of post-harvest residues and delayed planting improves fungal biodiversity in South African Eucalyptus plantations and enhances plantation productivity","authors":"Tanay Bose ,&nbsp;Jolanda Roux ,&nbsp;Louis Titshall ,&nbsp;Steven B. Dovey ,&nbsp;Almuth Hammerbacher","doi":"10.1016/j.apsoil.2025.106091","DOIUrl":"10.1016/j.apsoil.2025.106091","url":null,"abstract":"<div><div>Short-rotation <em>Eucalyptus</em> plantations provide essential forest products, with productivity and soil health influenced by residue management and planting strategies. This study examined the effects of burning or mulching post-harvest residue followed by immediate versus delayed planting on soil fungal biodiversity, soil properties, and tree growth across four sites in KwaZulu-Natal, South Africa. Plots were planted either three months ('immediate') or six months ('delayed') after treatment implementation. Volume measurements assessed tree growth, and soil attributes, including moisture, temperature, and nutrient levels, were analyzed. Soil samples were collected in November 2019 and March 2022, and fungal communities were analyzed through high-throughput sequencing targeting the internal transcribed spacer 1 (ITS1) region. Data emerging from this study showed mulched plots had significantly higher tree volume, with delayed planting increasing productivity by 13.6 % at 24–36 months and 25 % at 36–48 months post-planting. Soil moisture was 1.3–2 times higher in mulched plots than in burnt plots. Mulching significantly reduced the maximum soil temperatures by 4.5–6.8 °C. Four months after treatment, burnt plots had higher pH (1.1-fold), carbon (2.2-fold), phosphate (1.6-fold) and manganese (2.5-fold). Initially, mulched plots had lower fungal biodiversity (0.81-fold) than burnt plots but surpassed them after 28 months (1.28-fold increase). Fungal community overlap declined from 83.28 % to 40.64 %, with mulching supporting higher saprotroph (1.3-fold) and symbiotroph (1.25-fold) abundances, while delayed planting increased pathotroph presence by 1.5-fold in burnt plots. These findings highlight the long-term benefits of mulching and delayed planting in enhancing fungal biodiversity, promoting beneficial microbial communities, and improving tree growth, contributing to more sustainable <em>Eucalyptus</em> plantation management.</div></div>","PeriodicalId":8099,"journal":{"name":"Applied Soil Ecology","volume":"210 ","pages":"Article 106091"},"PeriodicalIF":4.8,"publicationDate":"2025-04-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143800511","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"农林科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Case study on agroecosystem management: Seasonal soil microbiome and maize yield response to an innovative NPK mineral fertilizer enriched with beneficial bacterial strains","authors":"Mateusz Mącik ,&nbsp;Agata Gryta ,&nbsp;Jacek Panek ,&nbsp;Lidia Sas-Paszt ,&nbsp;Magdalena Frąc","doi":"10.1016/j.apsoil.2025.106084","DOIUrl":"10.1016/j.apsoil.2025.106084","url":null,"abstract":"<div><div>The ongoing degradation of arable soils poses a serious challenge to modern agriculture, requiring novel approaches for their restoration, including the implementation of biofertilizers and microbial inoculants. Hence, we explored the potential of innovative microbiologically enriched NPK fertilizer (called biofertilizer) to stimulate the activity and diversity of soil microbial communities in two degraded soils - Brunic Arenosol (BA) and Abruptic Luvisol (AL), under maize cultivation. The two year field experiments included the following treatments - standard, optimal dose of mineral fertilizer without microbial enrichment (PC/PK) designed to meet the nutritional requirements of maize and serving as the control treatment, optimal dose amended with beneficial bacterial strains (PA100/PW100) and a dose containing 40 % less NPK fertilizer but enriched with microorganisms (PA60/PW60). The application of biofertilizer stimulated the activity of key enzymes involved in carbon, nitrogen and phosphorus biotransformations in the soil, modified the metabolic profile of soil microorganisms and changed the genetic diversity of bacteria, archaea and fungi. We observed the increased number and the presence of specific terminal restriction fragments pointing on the higher diversity within microbial communities. Next Generation Sequencing revealed that biofertilizer modified the community composition at different taxonomic levels, increased number of functional sequences assigned to metabolic processes of various compounds and higher relative abundance of fungal trophic modes and ecological guilds important for soil health. The obtained results showed that microbiologically enriched NPK fertilizer exhibits multifarious actions and has a potential to improve soil microbiome quality and diversity, as well as influencing yield of maize production.</div></div>","PeriodicalId":8099,"journal":{"name":"Applied Soil Ecology","volume":"210 ","pages":"Article 106084"},"PeriodicalIF":4.8,"publicationDate":"2025-04-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143800130","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"农林科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Winter wheat cultivar improvement impacts rare bacterial communities in the rhizosphere more than abundant bacterial communities","authors":"Chunhong Xu ,&nbsp;Pengfei Dang ,&nbsp;Bart Haegeman ,&nbsp;Tiantian Huang ,&nbsp;Xiaoqing Han ,&nbsp;Miaomiao Zhang ,&nbsp;Shiguang Wang ,&nbsp;Xiaoliang Qin ,&nbsp;Kadambot H.M. Siddique","doi":"10.1016/j.apsoil.2025.106071","DOIUrl":"10.1016/j.apsoil.2025.106071","url":null,"abstract":"<div><div>Understanding the impact of genetic improvements in wheat cultivars on microbial communities is crucial for enhancing nitrogen utilization efficiency and increasing crop yields. This study analyzed 20 wheat cultivars released between 1964 and 2018, revealing shifts in abundant and rare bacterial communities in the rhizosphere, with distinct patterns over time. The α-diversity of abundant bacterial communities significantly declined with newer cultivars, while rare communities increased. The β-diversity of abundant groups remained stable, while rare groups decreased. Stochastic processes influenced these communities, with abundant groups maintaining a constant stochastic element and rare groups experiencing increased stochasticity. Functional predictions revealed decreased anaerobic chemoheterotrophy and fermentation and increased ureolysis and aromatic compound degradation in rare communities. Random forest analysis showed that the composition of the rare bacterial communities explained more variation in cultivar improvement than that of abundant communities. In abundant bacterial communities, increases in <em>F_Rhizobiaceae</em> and <em>G_Pedobacter</em> correlated with higher grain yield and nitrogen ultilization efficiency. In rare bacterial communities, higher grain yields were associated with increases in <em>S_Pelomonas_aquatica</em>, <em>S_Dyadobacter_hamtensis</em>, <em>G_Erwinia</em>, and <em>G_Sphingobacterium</em>, while P_Candidatus_Saccharibacteria and <em>S_Dyadobacter_hamtensis</em> contributed to enhanced nitrogen efficiency. These findings offer valuable insights into how genetic improvements in wheat cultivars influence soil bacterial communities, potentially optimizing nitrogen ultilization and boosting grain yields.</div></div>","PeriodicalId":8099,"journal":{"name":"Applied Soil Ecology","volume":"210 ","pages":"Article 106071"},"PeriodicalIF":4.8,"publicationDate":"2025-04-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143776369","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"农林科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}