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Melatonin activates the OsbZIP79–OsABI5 module that orchestrates nitrogen and ROS homeostasis to alleviate nitrogen-limitation stress in rice

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Plant Communications 2023年第6期4卷 113-133页

作者： Meng Jiang Yue Song Ruifang Yang chenfan zheng Yunchao zheng Huali Zhang Shan Li Yuanyuan Tan Jianzhong Huang Qingyao Shu Ruiqing Li Hainan Institute Zhejiang UniversityYazhou Bay Sci-Tech CitySanyaChina National Key Laboratory of Rice Breeding and Biology and Zhejiang Provincial Key Laboratory of Crop Germplasm The Advanced Seed InstituteZhejiang UniversityHangzhouChina College of Agronomy Anhui Agricultural UniversityHefeiChina Crop Breeding and Cultivation Research Institute Shanghai Academy of Agricultural SciencesShanghaiChina School of Life Sciences Westlake UniversityHangzhouChina State Key Laboratory of Rice Breeding and Biology and Chinese National Center for Rice Improvement China National Rice Research InstituteHangzhouChina

Melatonin(Mel)has previously been reported to effectively alleviate nitrogen-limitation(N-L)stress and thus increase nitrogen-use efficiency(NUE)in several plants,but the underlying mechanism remains ***,we revealed that OsbZIP79(BASIC LEUCINE ZIPPER 79)is transcriptionally activated under N-L conditions,and its expression is further enhanced by exogenous *** the combined use of omics,genetics,and biological techniques,we revealed that the OsbZIP79–OsABI5(ABSCISIC ACID INSENSITIVE 5)module stimulated regulation of reactive oxygen species(ROS)homeostasis and the uptake and metabolismof nitrogen under conditions of indoor nitrogen limitation(1/16 normal level).OsbZIP79 activated the transcription of OsABI5,and OsABI5 then bound to the promoters of target genes,including genes involved in ROS homeostasis and nitrogen metabolism,activating their *** module was also indispensable for upregulation of several other genes involved in abscisic acid catabolism,nitrogen uptake,and assimilation under N-L and Mel treatment,although these genes were not directly transactivated by *** experiments demonstrated that Mel significantly improved rice growth under low nitrogen(L-N,half the normal level)by the same mechanism revealed in the nitrogen-limitation *** application produced a 28.6%yield increase under L-N and thus similar increases in ***,two OsbZIP79-overexpression lines grown in L-N field plots had significantly higher NUE(+13.7%and+21.2%)than their wild ***,our data show that an OsbZIP79–OsABI5 module regulates the rice response to N insufficiency(N limitation or low N),which is important for increasing NUE in rice production.

关键词： melatonin peroxidase nitrogen starvation allantoinase ROS signaling

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OsNAC5 orchestrates OsABI5 to fine-tune cold tolerance in rice

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Journal of Integrative Plant Biology 2024年第4期66卷 660-682页

作者： Ruiqing Li Yue Song Xueqiang Wang chenfan zheng Bo Liu Huali Zhang Jian Ke Xuejing Wu Liquan Wu Ruifang Yang Meng Jiang College of Agronomy Anhui Agricultural UniversityHefei 230036China Hainan Institute Yazhou Bay Sci-Tech CityZhejiang UniversitySanya 572025China National Key Laboratory of Rice Biology Advanced Seed InstituteZhejiang UniversityHangzhou 311225China State Key Laboratory of Rice Biology and Chinese National Center for Rice Improvement China National Rice Research InstituteHangzhou 311401China Key Laboratory of Germplasm Innovation and Genetic Improvement of Grain and Oil Crops(Co-Construction by Ministry and Province) Ministry of Agriculture and Rural AffairsCrop Breeding and Cultivation Research InstituteShanghai Academy of Agricultural SciencesShanghai 201106China

Due to its tropical origins,rice(Oryza sativa)is susceptible to cold stress,which poses severe threats to ***5,a NAC-type transcription factor,participates in the cold stress response of rice,but the detailed mechanisms remain poorly ***,we demonstrate that OsNAC5 positively regulates cold tolerance at germination and in seedlings by directly activating the expression of ABSCISIC ACID INSENSITIVE 5(OsABI5).Haplotype analysis indicated that single nucleotide polymorphisms in a NAC-binding site in the OsABI5 promoter are strongly associated with cold ***5 also enhanced OsABI5 stability,thus regulating the expression of cold-responsive(COR)genes,enabling fine-tuned control of OsABI5 action for rapid,precise plant responses to cold *** affinity purification sequencing coupled with transcriptome deep sequencing identified several OsABI5 target genes involved in COR expression,including DEHYDRATION-RESPONSIVE ELEMENT BINDING FACTOR 1A(OsDREB1A),OsMYB20,and PEROXIDASE 70(OsPRX70).In vivo and in vitro analyses suggested that OsABI5 positively regulates COR gene transcription,with marked COR upregulation in OsNAC5-overexpressing lines and downregulation in osnac5 and/or osabi5 knockout *** study extends our understanding of cold tolerance regulation via OsNAC5 through the OsABI5-CORs transcription module,which may be used to ameliorate cold tolerance in rice via advanced breeding.

关键词： ABA signaling ABI5 cold tolerance DREB NAC5 rice

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Isolation and characterization of a novel cis-acting sequences regulating root-specific gene from Daucus carota L.

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Chinese Science Bulletin 2004年第22期49卷 2393-2398页

作者： LIUYan GUOChang-an RENHaibo chenfan InstituteofGeneticsandDevelopmentalBiology ChineseAcademyofSciencesBeijing100080China

Aquaporins are ubiquitous channel proteins that facilitate the transport of water across cell membranes. Most of aquaporins are represent in more than one tissues, but some of them performed highest in roots. They are be- lived to participate in water transport. DcRB7, a member of the aquaporin family, was isolated from somatic embryos of carrot and identified as a homologous gene of TobRB7. Further studies showed that the expression of DcRB7 was particular in carrot root. To investigate the transcription regulation of DcRB7, a 650-bp upstream sequence of DcRB7 was isolated by inverse PCR, and was fused to the β-glucuronidase (GUS) report gene. After the recombined vectors were transformed into tobacco, the expression pat- tern was performed by histochemical staining and the quan- titative analysis of GUS activity. The results indicated that the cis-acting element of DcRB7 gene directs GUS expression not only as root-specific but also as drought inducible.

关键词：分离表征顺式作用元素根胡萝卜基因调节转基因作物基因表达

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Microstructure and fatigue behavior of laser-powder bed fusion austenitic stainless steel

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Journal of Materials Science & Technology 2020年第11期42卷 191-200页

作者： chenfan Yu Peng Zhang Zhefeng Zhang Wei Liu School of Materials Science and Engineering Tsinghua UniversityBeijing 100084China Laboratory of Fatigue and Fracture For Materials Institute of Metal ResearchChinese Academy of SciencesShenyang 110016China

The microstructures and stress-controlled fatigue behavior of austenitic stainless steel(AISI 316 L stainless steel)fabricated via laser-powder bed fusion(L-PBF)technique were *** L-PBF process,zigzag laser scanning strategy(scan rotation between successive layer was 0°,ZZ sample)and crosshatching layer scanning strategy(scan rotation between successive layer was 67°,CH sample)were *** inducing different thermal history,it is found that the scan strategies of laser beam have a significant impact on grain size and *** cracks generally initiated from persistent slip bands(PSBs)or grain boundaries(GBs).It is observed that PSBs could transfer the melt pool boundaries(MPBs)*** MPBs have better strain compatibility compared with grain boundaries(GBs),thus MPBs would not be the initiation site of fatigue cracks.A higher fatigue limit strength could be achieved by employing a crosshatching scanning *** the CH sample,fatigue cracks also initiated from GBs and ***,fatigue crack initiated from process-induced defects were observed in ZZ sample in high-cycle *** microstructures and defects characteristics are important factors affecting the fatigue performance of L-PBF 316 L ***-induced defects originated from fluid instability can be effectively reduced by adjusting the laser scan strategy.

关键词： Laser-powder bed fusion Austenitic stainless steel Microstructures Fatigue crack

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Effect of Build Direction on Fatigue Performance of L-PBF 316L Stainless Steel

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Acta Metallurgica Sinica(English Letters) 2020年第4期33卷 539-550页

作者： chenfan Yu Yuan Zhong Peng Zhang Zhenjun Zhang Congcong Zhao Zhefeng Zhang Zhijian Shen Wei Liu State Key Laboratory of New Ceramic and Fine Processing School of Materials Science and EngineeringTsinghua UniversityBeijing 100084China Department of Materials and Environmental Chemistry Arrhenius LaboratoryStockholm University10691 StockholmSweden Laboratory of Fatigue and Fracture for Materials Institute of Metal ResearchChinese Academy of SciencesShenyang 110016China

The microstructure and fatigue and tensile properties of 316 L stainless steel fabricated via laser powder bed fusion(L-PBF)were *** 316 L stainless steel specimens with different loading directions which are either perpendicular to or parallel to building direction were prepared by L-PBF *** results of X-ray diffraction tomography showed that there was no significant difference in morphology and size/distribution of the defects in the HB and VB *** long axis of columnar grains is generally parallel to the build direction,the fatigue crack encounters more grain boundaries in VB samples under cyclic loading,which led to enhanced fatigue resistance of VB samples compared with HB *** contrast to HB sample,the VB sample has a higher fatigue strength due to a higher resistance to localized plastic deformation under cyclic *** differences in fatigue properties of L-PBF 316 L SS with different build directions were predominantly controlled by solidification microstructures.

关键词： Austenitic stainless steel Laser powder bed fusion Tensile properties Fatigue strength

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Tailoring interfacial electron redistribution of Ni/Fe_(3)O_(4) electrocatalysts for superior overall water splitting

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Journal of Energy Chemistry 2022年第10期31卷 330-338,I0008页

作者： Wenli Xu Wenda Zhong chenfan Yang Rong Zhao Jing Wu Xuanke Li Nianjun Yang Hubei Province Key Laboratory of Coal Conversion and New Carbon Materials Wuhan University of Science and TechnologyWuhan 430081HubeiChina Hunan Province Key Laboratory for Advanced Carbon Materials and Applied Technology Hunan UniversityChangsha 410082HunanChina Institute of Materials Engineering University of SiegenSiegen 57076Germany

Exploring highly active earth-abundant bifu nctional electrocatalysts for water splitting at a high output is essential for the forthcoming hydrogen ***-noble Fe_(3)O_(4) catalyst owns outstanding conductivity and its octahedral Fe sites can markedly promote water ***,it lacks active centers on the surface,resulting in its poor activity when used as a catalyst for hydrogen evolution reaction(HER)and oxygen evolution reaction(OER).Herein,an electron redistribution strategy is proposed by introducing Ni sites onto the surface of Fe_(3)O_(4)(Ni/Fe_(3)O_(4)).The abundant delocalized electrons,derived from the electronic interaction of Ni and Fe_(3)O_(4) species,significantly optimize the electronic structure of the Ni/Fe_(3)O_(4) catalyst,leading to its improved adsorption *** Ni/Fe_(3)O_(4) catalyst exhibits remarkable bifunctional activity,steadily outputting 1000 mA cm^(-2)at the low overpotential of 387 mV for HER and 338 mV for OER,*** Ni/Fe_(3)O_(4) as a bifunctional catalyst for overall water splitting reaction exhibits the optimal performance with outstanding stability,obtaining a current density of1000 mA cm^(-2)at 1.98 V,much superior to a Pt/C‖IrO_(2)*** analysis and theoretical calculations collectively corroborate that the electron redistribution of Fe_(3)O_(4) is activated by coupling Ni species,leading to the promoted HER and OER *** electron redistribution strategy provides an effective method to activate transition metal-based catalysts which are promising to be utilized as superior electrocatalysts for the industrial overall water splitting reaction.

关键词： Electron redistribution Ni/Fe_(3)O_(4)heterojunction Overall water splitting

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Thermal processing induced release and degradation of paralytic shellfish toxin from mussels Mytilus edulis

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Journal of Oceanology and Limnology 2022年第6期40卷 2267-2276页

作者： chenfan DONG Haiyan WU Jixing PENG Mengmeng GUO Yuxiu ZHAI Zhijun TAN College of Food Science and Technology Shanghai Ocean UniversityShanghai 201306China Key Laboratory of Testing and Evaluation for Aquatic Product Safety and Quality Ministry of AgricultureYellow Sea Fisheries Research InstituteChinese Academy of Fishery SciencesQingdao 266071China Pilot National Laboratory for Marine Science and Technology(Qingdao) Qingdao 266237China Collaborative Innovation Center of Seafood Deep Processing Dalian Polytechnic UniversityDalian 116034China

Understanding the risk factors associated with shellfish consumption is a relevant public health concern because of the potential adverse ef fects of paralytic shellfish toxins(PSTs).This work aims to study the effects of the five most common heating treatments(steaming,boiling,frying,water-bath heating,and microwaving),for different processing times and temperature/power settings,on the content of PSTs in mussels(Mytilus edulis)collected in Qinhuangdao,*** toxin concentration,removal percentages,and toxin distribution in the cooking liquor and meat were *** five processing modes effectively accelerated toxin release into the cooking *** average percentage removal was 73.53%±16.50%from *** led to the most significant toxin degradation among the methods *** findings should facilitate risk assessment of PSTs in mussels.

关键词： processing mode mussels removal percentage toxin distribution

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Interfacial electron rearrangement: Ni activated Ni(OH)_(2) for efficient hydrogen evolution

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Journal of Energy Chemistry 2021年第10期30卷 236-242,I0007页

作者： Wenda Zhong Wenlong Li chenfan Yang Jing Wu Rong Zhao Memona Idrees Hui Xiang Qin Zhang Xuanke Li Hunan Province Key Laboratory for Advanced Carbon Materials and Applied Technology College of Materials Science and EngineeringHunan UniversityChangsha 410082HunanChina Hubei Province Key Laboratory of Coal Conversion and New Carbon Materials School of Chemistry and Chemical EngineeringWuhan University of Science and TechnologyWuhan 430081HubeiChina

The rational modulation of electronic structure is highly desirable to develop an efficient alkaline hydrogen evolution reaction(HER)catalyst for renewable energy *** hydroxide such as Ni(OH)_(2) has been proven useful for promoting alkaline HER,but the performance remains ***,the electronic structure of Ni(OH)_(2) is modulated by the interfacial electron rearrangement between Ni-Ni(OH)_(2) *** experiments with DFT simulations,the electrons of Ni species accumulate to the interfacial Ni-Ni(OH)_(2) sites,which modifies the d band center for promoting conversion of hydrogen intermediates and narrows the energy gap for boosting charge transfer in the HER ***,the integrated electrode exhibits an efficient HER performance to drive10 mA cm^(-2) at the overpotential of 72 mV with a low Tafel slope of 43 mV dec^(-1).Our work renders a valuable insight for understanding and rationally designing efficient catalysts in alkaline HER.

关键词： Electron rearrangement Hydrogen evolution Ni(OH)_(2) Ni Heterojunction

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Deformation Properties of Remolded Loess Compacted via Vertical Vibration Compaction Method

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Journal of Traffic and Transportation Engineering(English Edition) 2023年

作者： Kejia Yuan Yingjun Jiang Jiangtao Fan chenfan Bai Wei Zhang Jinshun Xue Key Laboratory for Special Area Highway Engineering of Ministry of Education，Chang’an University Xi’an

To investigate the deformation properties of remolded loess subgrade under long-term cyclic dynamic loading， remolded loess specimens compacted via vertical vibration compaction method were produced and some factors influencing elasticstrain and cumulative plastic strain， which include the number of vibration cycles， depth， and water content， have been investigated. A prediction model for cumulative plastic deformation was *** addition， the collapsible deformation properties of remolded loess were investigated. Results indicate that the elastic strain and plastic strain are decreased with increasing vibration cycles and depth and finally tend to be stable when the number of vibration cycles is more than 2000 and the depth exceeds 2.5 m. The elastic strain and cumulative plastic strain of compacted loess are increased by 7.2% and 13.0%， respectively， when the water content increases by 1%.The cumulative plastic deformation of remolded loess follows a logarithmic distribution. The elastic deformation and cumulative plastic deformation of loess subgrade are far less than the demands for elastic deformation and post-construction settlement of *** the compaction coefficient and water content are increased by 1%， the collapsibility coefficient of compacted loess is decreased by an average of 13.7% and 14.5%. Such investigations can prevent subgrade diseases and ensure the safety of subgrade filled with loess soils.

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Modeling and Simulation of Electrical System in More Electric Civil Aircraft Considering Faults

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International Journal of Plant Engineering and Management 2018年第4期23卷 193-205页

作者： WANG Jingyi HUANG Zequn PENG chenfan ZHAO Xujing LI Yihui SONG Shoujun State Key Laboratory of Civil Aircraft Flight Simulation Shanghai Aircraft Design and Research Institute School of Automation Northwestern Polytechnical University

Based on the integrated design and airworthiness verification of civil aircraft system,this paper completes the simulation modeling and fault modeling of aircraft electrical system. The aircraft electrical system is constructed in the form of dual generators and dual-channel power supply. The main power supply adopts the three-stage power generation system,the auxiliary power supply system uses the permanent magnet synchronous power generation system and a battery. The transmission and distribution system is responsible for the electrical power conversion and the logic control in the system fault-pattern. The simulation results show that the system is reasonable and effective,which provides a reference for the optimal design and control of the actual aircraft electrical system.

关键词： more electric aircraft electrical system fault-pattern simulation

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