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Host preferences of root-associated fungi and their responses to decadal nitrogen and fungicide applications in an alpine pasture ecosystem

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Journal of Integrative Agriculture 2025年第03期 885-899页

作者： hao xi Jing Zeng Jiayao Han Yali Zhang Jianbin Pan Qi Zhang Huyuan Feng Yongjun Liu School of Life Sciences Lanzhou University State Key Laboratory of Herbage Improvement and Grassland Agro-Ecosystems College of Ecology Lanzhou University

Plant roots interact with diverse fungi that are essential for maintaining the productivity and sustainability of pasture ecosystems, but how these root-associated fungi(RAF) differ between forage species and how they respond to nutrient enrichment and fungicide application are not well understood. Here, we constructed an 11-year experiment involving fungicide application(with or without) nested within four levels of experimental nitrogen(N) addition treatments in an alpine pasture, and the RAF communities, root traits, tissue nutrients, and shoot biomass of two dominant forage species(Carex capillifolia and Elymus nutans) were analyzed. The RAF community composition showed striking differences between the plant species and was strongly affected by both N addition level and fungicide applications. Fungicide, but not N application, dramatically reduced the RAF richness of all functional guilds in both plant species, and fungicide also simplified the co-occurrence network of the RAF for C. *** RAF community correlated strongly with root traits, whereas their relationships became weakened or even vanished at the level of the individual plant species. The importance of RAF to plant nutrients and productivity varied between plant species, with significant contributions in C. capillifolia but not in E. nutans. This is the first report elucidating the long-term effect of fungicides on RAF in alpine pastures, and our findings emphasize the host-specific responses of RAF community structure and function to anthropogenic disturbances.

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Aerobic granular sludge formation based on substrate availability:Effects of flow pattern and fermentation pretreatment

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Frontiers of Environmental Science & Engineering 2020年第3期14卷 155-164页

作者： Quan Yuan Hui Gong hao xi Kaijun Wang State Key Joint Laboratory of Environment Simulation and Pollution Control School of EnvironmentTsinghua UniversityBeijing 100084China

The influences of flow patterns(mixed-flow and plug-flow)and fermentation pretreatment on aerobic granular sludge(AGS)formation with various substrate availability levels were investigated by running four identical laboratory-scale sequencing batch reactors(R1-R4),comparing two anaerobic feeding strategies and three kinds of substrates.R1 achieved faster granulation with a fast influent fill step followed by a modified anaerobic mixed-flow phase,but the AGS showed poorer stability with a cracked structure and a high suspended solids concentration in the *** anaerobic plug-flow feeding mode(with influent fed slowly from the bottom)in R2 provided deeper penetration depth for the substance to reach the core of A G S and accordingly strengthen A G S *** acidogenic upflow sludge bed reactor was introduced as a pretreatment to improve the AGS performance by enhancing glucose pre-fermentation(R4).AGS fed with mixed volatile fatty acids(VFA)after glucose fermentation showed similar performance compared with the reactor fed with acetate in the aspects of stability,structure,size distribution and nitrogen removal efficiency,and 74%similarity in the microbial *** actual wastewater with low VFA concentrations,fermentation treatment was suggested as a promising pretreatment for stable AGS granulation and operation.

关键词： Anaerobic plug-flow feeding mode Anaerobic mixed-flow mode Fermentation pretreatment Substrate gradient Penetration depth

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Small auxin upregulated RNA (SAUR) gene family in maize: Identification, evolution, and its phylogenetic comparison with Arabidopsis, rice, and sorghum

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Journal of Integrative Plant Biology 2014年第2期56卷 133-150页

作者： Yuzhu Chen xi hao Jun Cao Institute of Life Science Jiangsu University Industrial Crop Institute Henan Academy of Agricultural Sciences

Small auxin-up RNAs （.SAURs） are the early auxin- responsive genes represented by a large multigene family in plants. Here, we identified 79 SAUR gene family members from maize （Zea mays subsp, mays） by a reiterative database search and manual annotation. Phylogenetic analysis indicated that the SAUR proteins from Arabidopsis, rice, sorghum, and maize had divided into 16 groups. These genes were non-randomly distributed across the maize chromosomes, and segmental duplication and tandem duplication contributed to the expansion of the maize .SAUR gene family. Synteny analysis established ortholos^J relationships and functional linkages between SAUR genes in maize and sorghum genomes. We also found that the auxin-responsive elements were conserved in the upstream sequences of maize SAUR members. Selection analyses identified some significant site-specific constraints acted on most SAUR paralogs. Expression profiles based on microarray data have provided insights into the possible functional divergence among members of the .SAUR gene family. Quantitative real-time PCR analysis indicated that some of the 10 randomly selected ZmSAUR genes could be induced at least in maize shoot or root tissue tested. The results reveal a comprehensive overview of the maize .SAUR gene family and may pave the way for deciphering their function during pJant development.

关键词： Evolution expression maize small auxin-up RNA

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Universal order-parameter and quantum phase transition for two-dimensional q-state quantum Potts model

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Chinese Physics B 2022年第7期31卷 163-168页

作者： Yan-Wei Dai Sheng-hao Li xi-hao Chen Centre for Modern Physics and Department of Physics Chongqing UniversityChongqing 400044China Chongqing Vocational Institute of Engineering Chongqing 402260China Research Institute for New Materials and Technology Chongqing University of Arts and SciencesChongqing 400000China

We investigate quantum phase transitions for q-state quantum Potts models(q=2,3,4)on a square lattice and for the Ising model on a honeycomb lattice by using the infinite projected entangled-pair state algorithm with a simplified updating *** extend the universal order parameter to a two-dimensional lattice system,which allows us to explore quantum phase transitions with symmetry-broken order for any translation-invariant quantum lattice system of the symmetry group *** universal order parameter is zero in the symmetric phase,and it ranges from zero to unity in the symmetry-broken *** ground-state fidelity per lattice site is computed,and a pinch point is identified on the fidelity surface near the critical *** results offer another example highlighting the connection between(i)critical points for a quantum many-body system undergoing a quantum phase-transition and(ii)pinch points on a fidelity *** addition,we discuss three quantum coherence measures:the quantum Jensen–Shannon divergence,the relative entropy of coherence,and the l1norm of coherence,which are singular at the critical point,thereby identifying quantum phase transitions.

关键词： quantum phase transitions universal order parameter fidelity

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酚酸基纳米金修饰电极检测食品中的亚硝酸盐和亚硫酸盐

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食品工业科技 2025年第1期46卷 274-282页

作者：陈林林吴松遥郝熙李伟张铭张海鹏李昕彤张娜哈尔滨商业大学食品工程学院黑龙江哈尔滨150028

基于酚酸良好的还原性和无污染性建立酚酸基纳米金传感体系,以实现亚硝酸盐和亚硫酸盐的灵敏检测。采用不同酚酸还原氯金酸制备纳米金(Gold nanoparticles,AuNPs),通过紫外光谱和交流阻抗法获得还原效果最佳的酚酸为没食子酸(Gallic aci... 详细信息

基于酚酸良好的还原性和无污染性建立酚酸基纳米金传感体系,以实现亚硝酸盐和亚硫酸盐的灵敏检测。采用不同酚酸还原氯金酸制备纳米金(Gold nanoparticles,AuNPs),通过紫外光谱和交流阻抗法获得还原效果最佳的酚酸为没食子酸(Gallic acid,GA)。利用电沉积法制备GA@AuNPs@Au电极,并由线性扫描伏安法(Linear scanning voltammetry,LSV)表征亚硝酸盐和亚硫酸盐的电化学行为。优化体系条件为:GA浓度1 mmol/L、孵育温度70℃、反应时间60 min、pH6.0磷酸盐缓冲溶液浓度0.15 mol/L。亚硝酸盐和亚硫酸盐浓度在0.001~7 mmol/L范围内与氧化峰电流分别呈良好的线性关系(R2>0.994),检出限分别为0.20μmol/L和0.24μmol/L(S/N=3)。该修饰电极的重现性和稳定性良好,可用于实际样品中亚硝酸盐和亚硫酸盐的同时测定。

关键词：酚酸纳米金修饰电极亚硝酸盐亚硫酸盐

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Effect of vanadium addition on microstructure and properties of AI_(0.5)Cr_(0.9)FeNi_(2.5)multi-principal alloys

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Journal of Iron and Steel Research International 2021年第5期28卷 586-596页

作者： De-xi hao Nan-nan Zhang Yue Zhang De-yuan Li Department of Material Science and Engineering Shenyang University of TechnologyShenyang 110870LiaoningChina Provincial Key Laboratory of Advanced Welding Technology and Automation Shenyang 110870LiaoningChina

AI_(0.5)Cr_(0.9)FeNi_(2.5)V_(x)(x=0,0.2,0.4,0.6,0.8,1.0)multi-principal alloys were prepared by vacuum arc *** effect of vanadium addition on its microstructure and properties was *** results show that the alloys of all components exhibited an FCC single-phase *** the addition of vanadium,the microstructure of the alloy changed from dendrites to equiaxed crystals,the grains were remarkably refined,and the layered CrV phase was exhibited,which improved the properties of the *** yield strength of the alloy was slightly improved,and the alloys with various components presented good *** V content reached 0.8,the yield strength was 600 MPa,and no fracture ***-wear testing showed that the wear debris was reduced with the addition of V *** sample with V element content of 0.4 had the best friction and wear *** surface grooves became shallow,the worn debris was less,and the wear mechanism was mainly abrasive *** polarisation curve showed that the alloy with V element content of 0.2 has the best corrosion *** passivation interval reached 900 *** corrosion potential and the corrosion current density were-496.299 mV and 2.759μA/cm^(2),respectively.

关键词： Multi-principal alloy Vacuum arc melting CrV phase Adhesive wear Electrochemical testing

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Synthesis, Crystal Structure and Properties of a Copper(Ⅰ) Coordination Polymer Based on Benzimidazole Derivative

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Chinese Journal of Structural Chemistry 2020年第11期39卷 2021-2026页

作者： JIA Qiang-Qiang LI Jun-Yi ZHANG hao-xi CHEN Li-Zhuang WANG Guo-xi School of Environmental and Chemical Engineering Jiangsu University of Science and TechnologyZhenjiang 212003China

A novel copper(I) coordination polymer [C30 H18 Cu3 Cl3 N4]n was solvethermally synthesized with 1-(prop-2-en-1-yl)-2-{4-[1-(prop-2-en-1-yl)-1 H-1,3-benzodiazol-2-yl]phenyl}-1 H-1,3-benzodiazole as the flexible ligand. It crystalizes in orthorhombic system, space group Pbcn with a = 22.0890(7), b = 6.3626(2), c = 18.2480(6) ?, V = 2564.64(14) ?3 and Mr = 365.73. The compound characterized by elemental analysis, infrared spectroscopy and powder X-ray diffraction analysis displays a 2 D structure. The complex shows strong green luminescence at 506 nm and better property of electrochemical oxygen evolution.

关键词： bisbenzimidazole ligand copper(Ⅰ)coordination polymer crystal structure electrocatalytic property

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A new genetic factor for root gravitropism in rice (Oryza sativa L.)

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Journal of Zhejiang University-Science B(Biomedicine & Biotechnology) 2009年第10期10卷 777-783页

作者： Jiang-hua SHI xi hao Zhong-chang WU Ping WU State Key Laboratory of Plant Physiology and Biochemistry College of Life Sciences Zhefiang University Hangzhou 310058 China

Root gravitropism is one of the important factors to determine root architecture. To understand the mechanism underlying root gravitropism, we isolated a rice （xiushui63） mutant defective in root gravitropism, designated as glsl. Vertical sections of root caps revealed that glsl mutant displayed normal distribution of amyloplast in the columella cells compared with the wild type. The glsl mutant was less sensitive to 2,4-dichlorophenoxyacetic acid （2,4-D） and ct-naphthaleneacetic acid （NAA） than the wild type. Genetic analysis indicated that the phenotype ofglsl mutant was caused by a single recessive mutation, which is mapped in a 255-kb region between RM16253 and CAPS1 on the short arm of chromosome 4.

关键词： Oryza sativa L. Root gravitropism Genetic factor

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Radiation efficiency and energy distribution from a borehole dipole source in the vertical transverse isotropic formation

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Petroleum Science 2024年第6期21卷 4034-4051页

作者： xi-hao Gu Fan-Tong Kong Yuan-Da Su xiao-Ming Tang School of Geosciences China University of Petroleum(East China) Centre for Exploration Geophysics Curtin University Ocean College Jiangsu University of Science and Technology Laoshan Laboratory

Dipole Shear-Wave Reflection Survey(DSRS) has gained wide application in identifying unconventional reservoirs in anisotropic formations. Previous investigations have illuminated how boreholes complicate the distribution of acoustic energy. However, these models have not accounted for the anisotropic context, rendering them insufficient for analyzing acoustic energy distribution and radiation efficiency in anisotropic formations. We derive expressions for energy flux and radiation efficiency from a borehole dipole source in the vertical-transverse isotropic(VTI) media using the Umov-Poynting vector and steepest-descent solution. Utilizing this approach, we systematically evaluate the sensitivity of anisotropic parameters to energy flux and radiation efficiency, unveiling intricate variations of these properties across frequency and anisotropic parameters. Our findings emphasize the substantial influence of formation anisotropy on energy distribution from a dipole source inside the borehole. Due to energy conversion between wave modes, five radiation wave modes are elicited by the dipole source, with the SH wave retaining its status as the prime candidate for DSRS in fast formations owing to its elevated radiation efficiency. Conversely, the qP-qP wave exhibits advantages over S waves in unconsolidated formations. A key distinction between isotropic and anisotropic media is the presence of dominant excitation frequencies in the low-frequency domain. The significance of dominant excitation-frequency bands is validated by field data, emphasizing their pivotal role. These results offer valuable insights for designing DSRS measurement strategies, which have broad application expectations for unconventional oil and gas exploration.

关键词： Dipole source Shear-wave reflection survey Anisotropic formation Energy flux Radiation efficiency

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Responses of arbuscular mycorrhizal fungi to straw return and nitrogen fertilizer reduction in a rainfed maize field

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Pedosphere 2024年第2期34卷 351-360页

作者： Zhenling PENG hao xi Lin MAO Huyuan FENG Jianjun ZHANG Yongjun LIU State Key Laboratory of Herbage Improvement and Grassland Agro-ecosystems College of EcologyLanzhou UniversityLanzhou 730000China College of Life Sciences Northwest Normal UniversityLanzhou 730070China School of Life Sciences Lanzhou UniversityLanzhou 730000China Dryland Agriculture Institute Gansu Academy of Agricultural SciencesLanzhou 730070China

Straw return can be used to reduce fertilizer input and improve agricultural sustainability and soil ***,how straw return and reduced fertilizer application affect beneficial soil microbes,particularly arbuscular mycorrhizal fungi(AMF),remains poorly ***,we conducted a five-year field experiment in a rainfed maize field on the Loess Plateau of northwestern *** tested four treatments with straw return combined with four nitrogen(N)application rates,i.e.,100%,80%,60%,and 0%of the common N application rate(225 kg N ha^(-1)year^(-1))in this region,and two reference treatments(full or no N application),with three replicates for each *** colonization was quantified and AMF communities colonizing maize roots were characterized using Illumina *** virtual taxa(VTs)of AMF were identified in root samples,among which VT113(related to Rhizophagus fasciculatus)and VT156(related to Dominikia gansuensis)were the predominant *** root length colonization and AMF VT richness were sensitive to N fertilization,but not to straw return;furthermore,both gradually increased with decreasing N application *** VT composition of the AMF community was also affected by N fertilization,but not by straw return,and the community variation could be well explained by soil available N and phosphorus ***,60%,80%,and full N fertilization produced similar maize ***,our study revealed the response patterns of AMF to straw return and N fertilizer reduction and showed that straw return combined with N fertilizer reduction may be a promising practice to maintain mycorrhizal symbiosis concomitantly with crop productivity.

关键词： agricultural sustainability crop productivity mycorrhizal colonization mycorrhizal symbiosis root length colonization virtual taxon

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