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Acknowledgment to reviewers 感谢审稿人
IF 7.3 2区 农林科学 Q1 SOIL SCIENCE Pub Date : 2025-11-20 DOI: 10.1016/S1002-0160(25)00134-1
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引用次数: 0
Information for contributors to PEDOSPHERE PEDOSPHERE贡献者的信息
IF 7.3 2区 农林科学 Q1 SOIL SCIENCE Pub Date : 2025-11-20 DOI: 10.1016/S1002-0160(25)00135-3
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引用次数: 0
Impacts of geography, climate, soil properties and vegetation characteristics on soil C:N and N:P stoichiometry across the Qinghai-Tibetan Plateau
IF 7.3 2区 农林科学 Q1 SOIL SCIENCE Pub Date : 2025-11-20 DOI: 10.1016/S1002-0160(25)00137-7
Wenlan FENG, Pierre MARIOTTE, Jun GU, Xiaodong SONG, Jinling YANG, Fei YANG, Yuguo ZHAO, Ganlin ZHANG
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引用次数: 0
Index to Volume 35, 2025 索引到第35卷,2025年
IF 7.3 2区 农林科学 Q1 SOIL SCIENCE Pub Date : 2025-11-20 DOI: 10.1016/S1002-0160(25)00136-5
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引用次数: 0
Cadmium detoxification by Stenotrophomonas sp. via cell wall exfoliation and regeneration mediated by mtgA mtgA介导的窄养单胞菌细胞壁脱落和再生对镉的解毒作用
IF 7.3 2区 农林科学 Q1 SOIL SCIENCE Pub Date : 2025-06-23 DOI: 10.1016/j.pedsph.2025.06.015
Jianming XU , Tong WANG , Jiawen ZHANG , Haoran GUAN , Zhenmei LÜ , Xin YAN , Randy A. DAHLGREN , Jizheng HE , Xingmei LIU
Understanding bacterial strategies for coping with heavy metal stress is essential for elucidating their resilience in contaminated environments. However, whether cell wall exfoliation contributes to bacterial tolerance under heavy metal stress, such as cadmium (Cd) exposure, remains unclear and requires further investigation. In this study, we reveal a novel self-protective mechanism in Stenotrophomonas sp. H225 isolated from a Cd-contaminated farmland soil, which underwent controlled cell wall exfoliation and regeneration in response to Cd stress up to 200 mg L-1. Transmission electron microscopy and energy-dispersive X-ray spectroscopy analyses revealed that the exfoliated cell wall fragments served as extracellular Cd sinks, thereby reducing intracellular Cd accumulation. Fourier-transform infrared spectroscopy and enzyme-linked immunosorbent assay indicated progressive peptidoglycan (PG) degradation, with exfoliated PG concentration in solution increasing from 148 ng mL-1 at 0 mg L-1 Cd to 240 ng mL-1 at 200 mg L-1 Cd. This degradation was counteracted by the compensatory upregulation of PG biosynthesis genes, with the enrichment ratio reaching up to 0.83, facilitating cell wall reconstruction. Transcriptomic analysis and gene knockout experiments identified mtgA (encoding a monofunctional transglycosylase) as a key determinant in cell wall repair and Cd resistance. To our knowledge, this is the first mechanistic evidence that bacteria can mitigate heavy metal toxicity through dynamic cell wall remodeling involving exfoliation and regeneration. This finding enhances our understanding of microbial survival strategies under environmental stress and highlights potential targets for engineering metal-tolerant strains for bioremediation applications.
了解细菌应对重金属胁迫的策略对于阐明它们在污染环境中的恢复能力至关重要。然而,细胞壁脱落是否有助于细菌在重金属胁迫下的耐受性,如镉(Cd)暴露,尚不清楚,需要进一步研究。在这项研究中,我们揭示了从Cd污染的农田土壤中分离的窄养单胞菌sp. H225的一种新的自我保护机制,该细胞在高达200 mg L-1的Cd胁迫下进行了控制的细胞壁脱落和再生。透射电镜和能量色散x射线能谱分析表明,脱落的细胞壁碎片起到了细胞外Cd汇的作用,从而减少了细胞内Cd的积累。傅里叶变换红外光谱和酶联免疫吸附实验表明,多糖(PG)的降解是渐进式的,脱落的PG在溶液中的浓度从0 mg L-1 Cd时的148 ng mL-1增加到200 mg L-1 Cd时的240 ng mL-1。这种降解被PG生物合成基因的代偿性上调所抵消,富集比达到0.83,有利于细胞壁的重建。转录组学分析和基因敲除实验发现,mtgA(编码单功能转糖基化酶)是细胞壁修复和抗Cd的关键决定因素。据我们所知,这是第一个机制证据,表明细菌可以通过包括脱落和再生在内的动态细胞壁重塑来减轻重金属毒性。这一发现增强了我们对环境胁迫下微生物生存策略的理解,并突出了工程耐金属菌株用于生物修复应用的潜在目标。
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引用次数: 0
Impact of soil viruses on C emissions can be enhanced by viral shuttle processes in soil 土壤病毒对碳排放的影响可以通过病毒在土壤中的穿梭过程来增强
IF 5.2 2区 农林科学 Q1 SOIL SCIENCE Pub Date : 2025-03-24 DOI: 10.1016/j.pedsph.2025.03.008
Di TONG , Caixian TANG , Jianming XU
Soil viruses can greatly influence both microbial catabolism and anabolism. Understanding such influences is crucial for unraveling the fate of soil organic carbon (C). However, previous studies on soil viruses have primarily focused on their role in soil C loss, overlooking their role in C sequestration. In this study, soil viruses and microbes were introduced into sterilized samples of crop and forest soils from typical red and brown soil regions of China to examine the effects of soil viruses on C dynamics, from the perspective of C release and retention. The results showed that the viral effects on soil C emissions varied between soil types. However, they significantly enhanced the accumulation of recalcitrant dissolved and metal-bound organic C, which in turn reinforced the viral effects on C emissions. Furthermore, the accumulation of dissolved and metal-bound organic C was always associated with the microbial utilization of dissolved organic nitrogen (N), highlighting the coupled C and N cycling during the viral shuttle process. Our research demonstrates for the first time the virus-mediated coupling of C and N cycling in soils and the dual role of viruses in soil C release and stabilization, providing a new understanding of virus-driven soil C cycling.
土壤病毒对微生物分解代谢和合成代谢都有很大的影响。了解这些影响对于揭示土壤有机碳(C)的命运至关重要。然而,以往对土壤病毒的研究主要集中在它们在土壤C流失中的作用,而忽视了它们在固碳中的作用。本研究将土壤病毒和微生物引入中国典型红壤和棕壤地区作物和森林土壤的消毒样品中,从碳释放和保持的角度研究土壤病毒对碳动态的影响。结果表明,病毒对土壤碳排放的影响因土壤类型而异。然而,它们显著增强了顽固溶态有机碳和金属结合有机碳的积累,这反过来又增强了病毒对碳排放的影响。此外,溶解有机C和金属结合有机C的积累一直与微生物对溶解有机氮(N)的利用有关,突出了病毒穿梭过程中C和N的耦合循环。我们的研究首次揭示了病毒介导的土壤C和N循环耦合以及病毒在土壤C释放和稳定中的双重作用,为病毒驱动的土壤C循环提供了新的认识。
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引用次数: 0
Coapplication of polyurethane microplastics and fertilizer accelerates CO2 emission in an infertile soil 聚氨酯微塑料和化肥的共同使用加速了贫瘠土壤中的二氧化碳排放
IF 5.2 2区 农林科学 Q1 SOIL SCIENCE Pub Date : 2025-02-01 DOI: 10.1016/j.pedsph.2024.03.006
Dong LIANG , Qiaolin ZHOU , Haiying LU , Jianwei ZHANG , Cheng JI , Jidong WANG
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引用次数: 0
Potential inhibition of humic acid against soil-borne pathogenic fungi: A review 腐植酸对土壤致病菌的潜在抑制作用研究进展
IF 5.2 2区 农林科学 Q1 SOIL SCIENCE Pub Date : 2025-02-01 DOI: 10.1016/j.pedsph.2024.11.007
Shiping WEI , Zhenqiang XIE , Yanling ZHAO , Quanzhi WANG , Yuanhua WANG , Jiayin ZHAO , Kaijun YIN , Zhihao ZHU , Yang LIU , Meng WU , Zhongpei LI
Green prevention and control management of soil-borne fungal diseases is a hot topic in agriculture, ecology, and the environment. It is an important way to effectively prevent and control soil-borne fungal diseases, solve soil degradation caused by continuous cropping obstacles, and fulfill the sustainable development of agriculture through revealing the mechanisms of functional substances to develop highly effective soil amendments. Humic acid shows an inhibitory effect on soil-borne pathogenic fungi, such as Fusarium oxysporum, Choanephora cucurbitarum, and Rhizoctonia solani, with the inhibition rate exceeding 80%. The molecular and elemental composition and contents of –COOH, phenolic C, methoxy group C, carboxyl C, aromatic C–O, anomeric C, and other functional groups of humic acid have been inferred to be responsible for its inhibitory effects on pathogenic fungi in previous research. The inhibitory mechanisms mainly include cell physiological morphology, biochemical process reactions, and molecular signal transduction. This review systematically summarizes the chemical structure, fungistatic effects, variable characteristics, and inhibitory mechanisms of humic acid, aiming to provide a theoretical basis for the development of green and efficient prevention and control technologies for soil-borne fungal diseases.
土传真菌病害绿色防治管理是农业、生态、环境等领域的研究热点。揭示功能物质的作用机制,开发高效的土壤改良剂,是有效防治土传真菌病害、解决连作障碍导致的土壤退化、实现农业可持续发展的重要途径。腐植酸对土传致病真菌尖孢镰刀菌、葫芦白霉、番茄根丝核菌等均有抑制作用,抑制率达80%以上。腐植酸的-COOH、酚C、甲氧基C、羧基C、芳香族C - o、头聚糖C等官能团的分子和元素组成及含量在以往的研究中被推断为腐植酸对病原真菌具有抑制作用的原因。抑制机制主要包括细胞生理形态、生化过程反应和分子信号转导。本文系统综述了腐植酸的化学结构、抑菌作用、变异特性及抑制机理,旨在为开发绿色高效的土传真菌病害防治技术提供理论依据。
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引用次数: 0
Exploring antimicrobial-resistant bacteria in sediments: A call for in-depth genomic analysis 探索沉积物中的抗微生物细菌:对深入基因组分析的呼吁
IF 5.2 2区 农林科学 Q1 SOIL SCIENCE Pub Date : 2025-02-01 DOI: 10.1016/j.pedsph.2023.11.002
João Pedro Rueda FURLAN , Eliana Guedes STEHLING , William CALERO-CÁCERES
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引用次数: 0
Microplastics as carriers of antibiotic resistance genes in agricultural soils: A call for research 微塑料作为农业土壤中抗生素抗性基因的载体:研究呼吁
IF 5.2 2区 农林科学 Q1 SOIL SCIENCE Pub Date : 2025-02-01 DOI: 10.1016/j.pedsph.2024.08.001
Vanesa SANTÁS-MIGUEL , Lucía RODRÍGUEZ-LÓPEZ , Manuel ARIAS-ESTÉVEZ , Andrés RODRÍGUEZ-SEIJO
Plastic contamination has become a major environmental concern and impacts human health, and yet this is still a topic that remains largely understudied. Effects of macro- and microplastics on soil physical, chemical, and biological properties, including soil biota, are considered adverse for soils. Due to their small size and porous surface, microplastics can also be a new environmental concern because of their ability to act as carriers of contaminants or diseases. This issue has become particularly relevant in agricultural soils because antibiotics can be present in manure or other kinds of amendments applied to farmlands or adsorbed on agricultural plastics that can be incorporated into soil. Furthermore, plastic debris can serve as a pollutant and carrier of pathogens or antibiotic resistance genes because plastics can favor modifications of bacterial cell membranes, thereby posing increased risks for the environment and humans. Although a vast amount of research has been done on the role of microplastics as tetracycline or oxytetracycline carriers, no studies have considered highly mobile antibiotics such as clarithromycin and combined exposure with microplastics in soil. In addition, more research should focus on the potential impacts of global change on degradation of plastics, especially biodegradable plastics, and plastic impact on the release of contaminants.
塑料污染已经成为一个主要的环境问题,影响人类健康,但这仍然是一个很大程度上未被充分研究的话题。宏观和微塑料对土壤物理、化学和生物特性的影响,包括土壤生物群,被认为对土壤不利。由于它们的小尺寸和多孔表面,微塑料也可能成为一个新的环境问题,因为它们能够作为污染物或疾病的载体。这个问题在农业土壤中变得尤为重要,因为抗生素可能存在于粪肥中,或施用于农田的其他种类的改良剂中,或吸附在可被纳入土壤的农业塑料上。此外,塑料碎片可以作为污染物和病原体或抗生素抗性基因的载体,因为塑料有利于细菌细胞膜的修饰,从而增加了对环境和人类的风险。尽管已经对微塑料作为四环素或土霉素载体的作用进行了大量研究,但没有研究考虑到高流动性抗生素,如克拉霉素,以及与土壤中微塑料的联合暴露。此外,更多的研究应该集中在全球变化对塑料降解的潜在影响,特别是可生物降解塑料,以及塑料对污染物释放的影响。
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