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Integrative multi-omics approaches reveal that Asian cultivated rice domestication influences its symbiotic relationship with arbuscular mycorrhizal fungi

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Pedosphere 2024年第2期34卷 315-327页

作者： Lei tian Jilin WANG Hongping CHEN Weiqiang LI Lam-Son Phan TRAN chunjie tian Key Laboratory of Mollisols Agroecology State Key Laboratory of Black Soils Conservation and UtilizationNortheast Institute of Geography and AgroecologyChinese Academy of SciencesChangchun 130102China Rice Research Institute Jiangxi Academy of Agricultural SciencesNanchang 330200China Institute of Genomics for Crop Abiotic Stress Tolerance Department of Plant and Soil ScienceTexas Tech UniversityLubbock TX 79409USA

Potential changes in the symbiotic relationship between rice(Oryza sativa)and microorganisms have occurred during the domestication of Asian cultivated rice(***)from common wild rice(Oryza rufipogon)and in response to global climate change,along with evolving adaptations to the *** potential genes may express differently or dominate the symbiotic relationships between arbuscular mycorrhizal fungi(AMF)and plants,which may be beneficial to rice *** date,research on this important topic has been *** this study,we aimed to examine the symbiotic relationships of Asian common wild and cultivated rice species with *** conducting a comparative metagenomic analysis of the rhizospheres of wild and cultivated rice species,we identified differences in Rhizophagus intraradices-related genes associated with wild and cultivated rice,as well as functional genes of ***,we obtained root-related genes associated with AMF from transcriptome data of rice *** results collectively suggest that ***-related genes in the rhizosphere of wild rice may be more conducive to its ***,bacteria from the Nitrosomonadaceae and Nitrospiraceae families identified in the rhizosphere of wild rice exhibited positive correlations with ***-related genes with protein identifiers 1480749 and1871253,which may indicate that nitrobacteria can enhance the functions of *** in association with wild ***,in a case study using comparative transcriptome analysis of root samples obtained from ***-inoculated wild and cultivated rice plants,we found significantly higher expression levels of the strigolactone pathway-related genes DWARF3(D3)and DWARF14(D14)in ***-inoculated common wild rice than in ***-inoculated cultivated *** study provides a theoretical basis for identifying the effects of domestication on mycorrhizal symbiosis-related genes,which could be promoted in wi

关键词： Rhizophagus intraradices root-related gene symbiotic effect strigolactone wild rice

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Positive effect of carbohydrate-metabolizing bacteria determines increasing soil organic carbon during long-term fertilization and straw returning in the black soil region of China

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Pedosphere 2024年第5期34卷 853-864页

作者： Yingxin LI Yu SUN Eiko E.KURAMAE Shaoqing ZHANG Enze WANG Zongmu YAO Fahad NASIR Lei tian Qiang GAO chunjie tian State Key Laboratory of Black Soils Conservation and Utilization Northeast Institute of Geography and Agroecology Chinese Academy of Sciences University of Chinese Academy of Sciences Department of Microbial Ecology Netherlands Institute of Ecology (NIOO-KNAW) Ecology and Biodiversity Group Department of Biology Institute of Environmental Biology Utrecht University Padualaan 8 Jilin Agricultural University Key Lab Soil Resource Sustainable Utilization for Jilin Province Commodity Grain Bases

In the context of global efforts to reduce carbon (C) emissions, several studies have examined the effects of agricultural practices such as straw returning and fertilization on C sequestration by microorganisms. However, our understanding of the specific microbial groups and their roles in long-term C increase remains limited. In this study, a 36-year (1984–2020) farmland experiment was conducted to investigate the impact of bacterial C metabolism on the augmentation of organic C in a Typic Hapludoll (Mollisol) in the black soil region of Jilin Province, Northeast China. Our results demonstrated a noteworthy increase in the diversity of microorganisms in the farmland as a result of long-term straw returning and application of mixed chemical fertilizers. However,by examining the functions of microorganisms involved in C metabolism, it was observed that the effects of fertilization on C metabolism were relatively consistent. This consistency was attributed to a deterministic competitive exclusion process, which minimized the differences between treatment groups. On the other hand, the influence of straw addition on C metabolism appeared to follow a more random pattern. These changes in microbial activity were closely linked to the downregulation of core metabolic pathways related to C metabolism. Notably, long-term fertilization had a negative impact on soil organic C levels, while long-term straw returning plus fertilization resulted in a positive increase in soil organic C. These findings have important implications for enhancing soil organic C and grain yield in the regions with typical black soil.

关键词： community assembly metabolic pathway microbial activity Mollisol soil organic C straw addition

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基因敲除技术在微生物代谢途径改造中的研究进展

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吉林农业大学学报 2024年第2期46卷 175-186页

作者：张斯童石佳王刚田春杰陈光秸秆综合利用与黑土地保护教育部重点实验室长春130118 吉林农业大学生命科学学院长春130118 中国科学院东北地理与农业生态研究所黑土区农业生态重点实验室长春130102

微生物是生产多种高附加值天然产物的优良宿主,基因敲除技术有效地阻断或弱化了微生物的旁路代谢途径,使代谢通量集中流向目的产物。基因敲除技术在微生物中的应用带动了微生物代谢工程研究的不断深入,为微生物工业发酵及合成生物学的... 详细信息

微生物是生产多种高附加值天然产物的优良宿主,基因敲除技术有效地阻断或弱化了微生物的旁路代谢途径,使代谢通量集中流向目的产物。基因敲除技术在微生物中的应用带动了微生物代谢工程研究的不断深入,为微生物工业发酵及合成生物学的发展开辟了新道路。综述了常见的几种微生物基因敲除策略,总结了近年基因敲除技术在微生物代谢途径改造中的应用情况,并对基因敲除技术在微生物代谢途径改造中的应用前景进行了展望,以期为基因敲除技术的发展和微生物代谢工程的研究提供理论参考。

关键词：基因敲除技术代谢工程合成生物学底盘微生物

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Long-term fertilization and residue return affect soil stoichiometry characteristics and labile soil organic matter fractions

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Pedosphere 2020年第5期30卷 703-713页

作者： Shasha LUO Qiang GAO Shaojie WANG Lei tian Qi ZHOU Xiujun LI chunjie tian Key Laboratory of Mollisols Agroecology Northeast Institute of Geography and AgroecologyChinese Academy of SciencesChangchun 130102(China) College of Resources and Environment Jilin Agricultural UniversityChangchun 130118(China)

Ecological stoichiometry provides the possibility for linking microbial dynamics with soil carbon(C),nitrogen(N),and phosphorus(P)metabolisms in response to agricultural nutrient *** determine the roles of fertilization and residue return with respect to ecological stoichiometry,we collected soil samples from a 30-year field experiment on residue return(maize straw)at rates of 0,2.5,and 5.0 Mg ha^-1 in combination with 8 fertilization treatments:no fertilizer(F0),N fertilizer,P fertilizer,potassium(K)fertilizer,N and P(NP)fertilizers,N and K(NK)fertilizers,P and K(PK)fertilizers,and N,P,and K(NPK)*** measured soil organic C(SOC),total N and P,microbial biomass C,N,and P,water-soluble organic C and N,KMnO4-oxidizabIe C(KMnO4-C),and carbon management index(CMI).Compared with the control(F0 treatment without residue return),fertilization and residue return significantly increased the KMn〇4-C content and ***,compared with the control,residue return significantly increased the SOC ***,the NPK treatment with residue return at 5.0 Mg ha^-1 significantly enhanced the C:N,C:P,and N:P ratios in the soil,whereas it significantly decreased the C:N and C:P ratios in soil microbial ***,NPK fertilizer application combined with residue return at 5.0 Mg ha^-1 could enhance the SOC content through the stoichiometric plasticity of *** return and fertilization increased the soil C pools by directly modifying the microbial stoichiometry of the biomass that was C limited.

关键词： balanced fertilization carbon management index ecological stoichiometry microbial biomass soil organic C

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Simulation and experiment on prediction of total rice seeds mass in vibrating tray for vacuum plate seeder

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International Journal of Agricultural and Biological Engineering 2019年第5期12卷 81-86页

作者： Zhan Zhao Mingzhi Jin chunjie tian Fang Qin Institute of Agriculture Engineering Jiangsu UniversityZhenjiang 212013JiangsuChina

To improve the seeds pick-up precision of a vacuum plate seeder,it is important to accurately control the relative distance between suction plate and seeds layer in vibrating *** the excitation of reciprocating vibration with a time varying interference in direction angle,the seeds motion is simulated using the discrete element method(DEM).By analyzing the seeds distribution characteristics,it was found that the seeds-mass-per-unit-area(SMA)was approximately plane distributed in the ***,four square areas on the bottom of rectangular tray were divided symmetrically near the four vertices to measure the corresponding SMA respectively,and a monitoring plane model was established to predict the average SMA and total seeds mass in the *** prediction results of DEM simulation showed that the maximum and the mean relative errors were 6.75%and 2.85%.The influences of the normal vector of monitoring plane model and the standard deviation of SMA in four monitoring areas on the prediction errors were analyzed.A method for improving prediction accuracy by using linear regression correction was proposed,and the maximum and the mean relative errors could be reduced to 5.01%and 2.07%.When the tray was vibrated with the frequency of 11 Hz and the amplitude of 4 mm,experiments were carried out on the vacuum plate seeder test-rig.A Kalman filter was adopted to suppress the SMA measurement noise in four monitoring *** results indicated that the maximum and the mean relative errors were 10.2%and 3.46%with the average SMA in range of 0.9-1.5 g/cm2,*** paper can provide a basis for further study on the automatic control of suction plate motion according to the variation of seeds mass in the tray.

关键词： vacuum plate seeder rice seeds total mass prediction method vibrating tray discrete element method

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鼓室成形术伴与不伴乳突切开治疗活动期单纯型慢性化脓性中耳炎的疗效分析

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临床耳鼻咽喉头颈外科杂志 2024年第7期38卷 593-597页

作者：甘月园李瑞芝王博文甘海燕胡金梅田春杰唐建文大理大学临床医学院云南大理671000 大理白族自治州人民医院耳鼻喉科成都市郫都区人民医院耳鼻咽喉科成都611730

目的:分析鼓室成形术伴与不伴乳突切开治疗活动期单纯型慢性化脓性中耳炎(chronic suppurative otitis media,CSOM)的手术疗效及安全性,探讨在活动期CSOM鼓室成形术中是否可以避免开放乳突。方法:回顾性分析55例(55耳)活动期CSOM患者的... 详细信息

目的:分析鼓室成形术伴与不伴乳突切开治疗活动期单纯型慢性化脓性中耳炎(chronic suppurative otitis media,CSOM)的手术疗效及安全性,探讨在活动期CSOM鼓室成形术中是否可以避免开放乳突。方法:回顾性分析55例(55耳)活动期CSOM患者的临床资料,根据患者乳突及上鼓室发育情况,将有条件完成完壁式乳突切开术的患者为A组(30例),行鼓室成形术联合完壁式乳突切开术。无条件完成完壁式乳突切开术的患者为B组(25例)采用去除部分盾板骨质后通畅中、上鼓室及鼓窦引流,同时完成鼓室成形术。比较2组患者术后3个月鼓膜移植成活率、手术前后的听力情况及再穿孔等并发症情况。结果:活动期CSOM患者术后整体鼓膜成活率为96.4%(53/55),其中A组为96.7%;B组为96.0%,2组患者鼓膜成活率差异无统计学意义(P>0.05)。2组患者术后平均气骨导差值(ABG)较术前均有明显缩小,但2组患者ABG增益差异无统计学意义(P>0.05)。所有患者术后均无周围性面瘫、脑脊液漏、感音神经性聋等严重不良情况。结论:显微镜下采用通畅中上鼓室、鼓窦引流后的鼓室成形术治疗CSOM可获得满意的鼓膜成活率和听力提高疗效。且减少患者的创伤,防止因磨除乳突骨质后发生乳突区皮肤凹陷等并发症,缩短手术前的等待时间。

关键词：活动期慢性中耳炎乳突切开术

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Customized heat treatment process enabled excellent mechanical properties in wire arc additively manufactured Mg-RE-Zn-Zr alloys

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International Journal of Extreme Manufacturing 2024年第4期6卷 276-289页

作者： Dong Ma chunjie Xu Shang Sui Yuanshen Qi Can Guo Zhongming Zhang Jun tian Fanhong Zeng Sergei Remennik Dan Shechtman School of Materials Science and Engineering Xi'an University of TechnologyXi'anShaanxi 710048People's Republic of China Xi'an Shechtman Nobel Prize New Materials Institute Xi'an 710048People's Republic of China Xi'an Key Laboratory of Advanced Magnesium Alloy Additive Manufacturing and Precision Forming Xi'anShaanxi 710048People's Republic of China Department of Materials Science and Engineering and Guangdong Provincial Key Laboratory of Materials and Technologies for Energy Conversion Guangdong Technion—Israel Institute of TechnologyShantou 515063People's Republic of China MGM Nobel Prize New Materials Co. LtdTongchuan 727100People's Republic of China Department of Materials Science and Engineering Technion-Israel Institute of TechnologyHaifa 32000Israel Center for Nanoscience&Nanotechnology Hebrew University of JerusalemEdmond J.Safra CampusJerusalem 91904Israel

Customized heat treatment is essential for enhancing the mechanical properties of additively manufactured metallic materials,especially for alloys with complex phase constituents and heterogenous ***,the interrelated evolutions of different microstructure features make it difficult to establish optimal heat treatment ***,we proposed a method for customized heat treatment process exploration and establishment to overcome this challenge for such kind of alloys,and a wire arc additively manufactured(WAAM)Mg-Gd-Y-Zn-Zr alloy with layered heterostructure was used for feasibility *** this method,the optimal microstructures(fine grain,controllable amount of long period stacking ordered(LPSO)structure and nano-scaleβ'precipitates)and the corresponding customized heat treatment processes(520°C/30 min+200°C/48 h)were obtained to achieve a good combination of a high strength of 364 MPa and a considerable elongation of 6.2%,which surpassed those of other state-of-the-art WAAM-processed Mg ***,we evidenced that the favorable effect of the undeformed LPSO structures on the mechanical properties was emphasized only when the nano-scaleβ'precipitates were *** is believed that the findings promote the application of magnesium alloy workpieces and help to establish customized heat treatment processes for additively manufactured materials.

关键词： wire arc additive manufacturing heat treatment Mg-RE-Zn-Zr alloys LPSO structure mechanical properties

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丛枝菌根真菌脂类代谢对共生信号调控的响应和反馈

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微生物学报 2016年第1期56卷 26-34页

作者：田磊李元敬田春杰中国科学院东北地理与农业生态研究所黑土区农业生态重点实验室吉林长春130102 中国科学院大学研究生院北京100049

丛枝菌根(AM)真菌是自然生态系统中分布最为广泛的真菌之一,在自然界物质循环和能量流动中发挥着重要作用。经过长期的协同进化,AM真菌和宿主植物之间形成了完美的互惠互利的共生关系,而真菌的脂类代谢可能是揭示共生秘密的关键所在。... 详细信息

丛枝菌根(AM)真菌是自然生态系统中分布最为广泛的真菌之一,在自然界物质循环和能量流动中发挥着重要作用。经过长期的协同进化,AM真菌和宿主植物之间形成了完美的互惠互利的共生关系,而真菌的脂类代谢可能是揭示共生秘密的关键所在。本文综述了AM真菌脂类代谢在共生关系建立和维持中关键作用的最新研究进展,重点探讨了AM真菌脂类代谢对共生信号调控的响应和反馈机制,主要包括:AM真菌脂类存储和释放对共生和非共生状态的响应,以及脂类代谢产物变化与共生营养传递之间的关系;脂类分解过程在共生建立初期对信号分子调控发生的响应,以及相应的物质转化和能量代谢;菌根共生互惠互利关系维持中,真菌脂类代谢与信号分子交流通道的相互渗透和影响。本文对于理解菌根共生机制,促进菌根在生产中的应用具有促进作用。

关键词：丛枝菌根真菌脂类代谢宿主植物共生信号调控

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盘吸式水稻排种器吸种动力学过程模拟及参数优化

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农业工程学报 2018年第7期34卷 38-44页

作者：赵湛田春杰吴亚芳黄贺东江苏大学农业工程研究院镇江212013

准确控制盘吸式排种器的吸种位置是提高水稻育秧播种精度的关键因素,吸盘的吸种位置能够根据种盘内籽粒数量的变化进行自适应调节则是稳定排种器连续作业性能的重要保证。该文通过多球拟合建立了2种椭球体水稻籽粒模型,采用标准k–ε湍... 详细信息

准确控制盘吸式排种器的吸种位置是提高水稻育秧播种精度的关键因素,吸盘的吸种位置能够根据种盘内籽粒数量的变化进行自适应调节则是稳定排种器连续作业性能的重要保证。该文通过多球拟合建立了2种椭球体水稻籽粒模型,采用标准k–ε湍流模型和Euler气固两相流模型进行计算流体动力学和离散元(CFD-DEM)耦合,完成了排种器的吸种动力学过程仿真。根据籽粒的空间分布特点,采用均匀分布模型和矩估计法计算了籽粒的空间分布范围和离散系数,获取了垂直往复振动激励下的籽粒离散运动状态和稳定特性,确定了理想的种层厚度范围。以能够有效吸附籽粒为条件,仿真获取了不同种层厚度下的临界吸种位置,分析了吸种距离的变化规律、籽粒形状对吸种性能的影响以及造成漏吸和重吸的原因。受到籽粒相互碰撞挤压等因素影响,CFD-DEM仿真获取的吸种距离小于静止状态下的籽粒吸附临界距离,考虑到实际振动种盘内种群运动的随机性更强,提出在仿真获取的临界吸种位置基础上,适当降低调节距离以提高吸盘的整体吸种性能。结合振动种盘内种层厚度的实时监测技术,以PLC为控制器设计了排种器吸种位置的自动控制装置,并在排种器性能试验台上以压差、吸种位置调节距离、种盘振动频率、种层厚度为因素进行正交试验,通过对吸种合格率的数学回归建模和优化得到:当吸孔直径为2.5 mm、种盘振幅为4.0 mm时,理想的压差为4.4 k Pa、种盘振动频率为10.6 Hz、吸种位置调节距离为2.7 mm。根据优化结果进行吸种性能试验,当种层厚度在15~25 mm范围变化时,排种器的吸种合格率达到94.5%。研究结果可以为提高盘吸式排种器的自动化水平和连续作业性能提供借鉴。

关键词：机械化优化模型育秧排种器盘吸式 EDEM-CFD耦合吸种位置控制方法

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固氮植物的菌根研究

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应用生态学报 2000年第2期11卷 306-310页

作者：赵淑清田春杰何兴元中国科学院沈阳应用生态研究所沈阳110015

综述了固氮植物菌根研究的概况 ,并对固氮植物形成菌根的普遍性、固氮植物联合共生的增效作用及逆境条件下菌根技术在固氮植物上的应用前景进行了总结和评述。

关键词：固氮植物菌根联合共生固氮机理

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