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Genetic analysis implicates a molecular chaperone complex in regulating epigenetic silencing of methylated genomic regions

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Journal of Integrative Plant Biology 2021年第8期63卷 1451-1461页

作者： Zhengyan Feng xiangqiang zhan Jia Pang Xue Liu Huiming zhang Zhaobo Lang Jian-Kang Zhu Shanghai Center for Plant Stress Biology and Center for Excellence in Molecular Plant Sciences Chinese Academy of SciencesShanghai201602 China State Key Laboratory of Crop Stress Biology for Arid Areas and College of Horticulture Northwest A&F UniversityYangling712100 China University of Chinese Academy of Sciences Beijing100049 China

DNA cytosine methylation confers stable epigenetic silencing in plants and many ***,the mechanisms underlying DNA methylation-mediated genomic silencing are not fully *** conducted a forward genetic screen for cellular factors required for the silencing of a heavily methylated p35S:NPTII transgene in the Arabidopsis thaliana rdm1-1 mutant background,which led to the identification of a Hsp20 family protein,RDS1(rdm1-1 suppressor 1).Loss-of-function mutations in RDS1 released the silencing of the p35S::NPTII transgene in rdm1-1 mutant plants,without changing the DNA methylation state of the *** interaction analyses suggest that RDS1 exists in a protein complex consisting of the methyl-DNA binding domain proteins MBD5 and MBD6,two other Hsp20 family proteins,RDS2 and IDM3,a Hsp40/DNAJ family protein,and a Hsp70 family *** rds1 mutations,mutations in RDS2,MBD5,or MBD6 release the silencing of the transgene in the rdm1 mutant *** results suggest that Hsp20,Hsp40,and Hsp70 proteins may form a complex that is recruited to some genomic regions with DNA methylation by methyl-DNA binding proteins to regulate the state of silencing of these regions.

关键词： epigenetic silencing heat shock proteins molecular chaperone complex

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The GAMYB-like gene SlMYB33 mediates flowering and pollen development in tomato

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Horticulture Research 2020年第1期7卷 903-918页

作者： Yan zhang Bo zhang Tongwen Yang Jie zhang Bin Liu xiangqiang zhan Yan Liang College of Horticulture Northwest A&F UniversityYangling 712100 ShaanxiP.R.China School of Agriculture and Biology Shanghai Jiao Tong UniversityShanghai 200240China

GAMYBs are positive GA signaling factors that exhibit essential functions in reproductive development,particularly in anther and pollen ***,there is no direct evidence of the regulation of any GAMYB in these biological processes in tomato(Solanum lycopersicum).Here,we identified a tomato GAMYB-like gene,SlMYB33,and characterized its specific ***33 is predominately expressed in the stamens and *** flower development,high mRNA abundance of SlMYB33 is detected in both male and female organs,such as microspore mother cells,anthers,pollen grains,and *** of SlMYB33 leads to delayed flowering,aberrant pollen viability,and poor fertility in *** analyses indicate that SlMYB33 exerts its function in pollen development in the mature *** transcriptomic analyses imply that the knockdown of SlMYB33 significantly inhibits the expression of genes related to flowering in shoot apices,and alters the transcription of genes controlling sugar metabolism in *** together,our study suggests that SlMYB33 regulates tomato flowering and pollen maturity,probably by modulating the expression of genes responsible for flowering and sugar metabolism,respectively.

关键词： metabolism sugar media

The tomato 2-oxoglutarate-dependent dioxygenase gene SlF3HL is critical for chilling stress tolerance

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Horticulture Research 2019年第1期6卷 1153-1164页

作者： Tixu Hu Yuqin Wang Qiqi Wang Ningning Dang Ling Wang Chaochao Liu Jianhua Zhu xiangqiang zhan State Key Laboratory of Crop Stress Biology for Arid Areas and College of Horticulture Northwest A&F UniversityNo.3Taicheng Road712100 YanglingShaanxiChina School of Biotechnology Jiangsu University of Science and TechnologyZhenjiangJiangsuChina Department of Plant Science and Landscape Architecture College of Agriculture and Natural ResourcesUniversity of MarylandCollege ParkMD 20742USA

Low temperature is a major stress that severely affects plant development,growth,distribution,and ***,we examined the function of a 2-oxoglutarate-dependent dioxygenase-encoding gene,SlF3HL,in chilling stress responses in tomato(Solanum lycopersicum *** Craig[AC]).Knockdown(KD)of SlF3HL(through RNA interference)in tomato led to increased sensitivity to chilling stress as indicated by elevated levels of electrolyte leakage,malondialdehyde(MDA)and reactive oxygen species(ROS).In addition,the KD plants had decreased levels of proline and decreased activities of peroxisome and superoxide *** expression of four cold-responsive genes was substantially reduced in the KD ***,seedling growth was significantly greater in AC or SlF3HLoverexpression plants than in the KD plants under either normal growth conditions with methyl jasmonate(MeJA)or chilling stress ***3HL appears to positively regulate JA accumulation and the expression of JA biosynthetic and signaling genes under chilling ***,these results suggest that SlF3HL is a positive regulator of chilling stress tolerance and functions in the chilling stress tolerance pathways,possibly by regulating JA biosynthesis,JA signaling,and ROS levels.

关键词： elevated stress chilling

4-methylumbelliferone (4-MU) enhances drought tolerance of apple by regulating rhizosphere microbial diversity and root architecture

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Horticulture Research 2023年第7期10卷 53-68页

作者： Dehui zhang Jieqiang He Pengda Cheng Yutian zhang Abid Khan Shicong Wang Zhongxing Li Shuang Zhao xiangqiang zhan Fengwang Ma Xuewei Li Qingmei Guan State Key Laboratory of Crop Stress Biology for Arid Areas/Shaanxi Key Laboratory of Apple College of HorticultureNorthwest A&F UniversityYangling 712100China College of Life Science Northwest A&F UniversityYangling 712100China Department of Horticulture The University of HaripurHaripur 22620Pakistan

The dwarfing rootstocks-mediated high-density apple orchard is becoming the main practice ***,dwarfing rootstocks are widely used worldwide,but their shallow root system and drought sensitivity necessitate high irrigation ***,the root transcriptome and metabolome of dwarfing(M9-T337,a drought-sensitive rootstock)and vigorous rootstocks(Malus sieversii,a drought-tolerant species,is commonly used as a rootstock)showed that a coumarin derivative,4-Methylumbelliferon(4-MU),was found to accumulate significantly in the roots of vigorous rootstock under drought *** exogenous 4-MU was applied to the roots of dwarfing rootstock under drought treatment,the plants displayed increased root biomass,higher root-to-shoot ratio,greater photosynthesis,and elevated water use *** addition,diversity and structure analysis of the rhizosphere soil microbial community demonstrated that 4-MU treatment increased the relative abundance of putatively beneficial bacteria and *** these,Pseudomonas,Bacillus,Streptomyces,and Chryseolinea bacterial strains and Acremonium,Trichoderma,and Phoma fungal strains known for root growth,or systemic resistance against drought stress,were significantly accumulated in the roots of dwarfing rootstock after 4-MU treatment under drought stress *** together,we identified a promising compound—4-MU,as a useful tool,to strengthen the drought tolerance of apple dwarfing rootstock.

关键词： drought dwarf roots

An NIR-Ⅱ-emissive Ru(Ⅱ) metallacycle for efficient and safe immunotherapy

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Science China Chemistry 2025年第1期68卷 5-7页

作者： Chonglu Li Jianbo zhan Biao Dong Institute of Health Inspection and Testing Hubei Provincial Center for Disease Control and Prevention State Key Laboratory on Integrated Optoelectronics College of Electronic Science and Engineering Jilin University

Immunotherapy, as a groundbreaking cancer treatment, has gained considerable attention for its utilization of the body’s immune system to combat tumors [1]. This therapy induces tumor cell apoptosis, triggering a sustained anti-tumor immune response and effectively preventing tumor recurrence and metastasis [2]. The fundamental principle lies in inducing tumor cell death through specific treatment modalities, leading to the release of a cascade of signaling molecules and antigens, thereby mobilizing the immune system to actively identify and attack tumor cells [3].

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Optimizing battery deployment: Aging trajectory prediction enabling homogenous performance grouping

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Journal of Energy Chemistry 2025年第1期100卷 565-577页

作者： Shuquan Wang Feng Gao zhan Ma Hao Tian Yusen zhang School of Control Science and Engineering Shandong University Key Lab of Power System Intelligent Dispatch and Control of Ministry of Education Shandong University

As battery deployments in electric vehicles and energy storage systems grow, ensuring homogeneous performance across units is crucial. We propose a multi-derivative imaging fusion(MDIF) model, employing advanced imaging and machine learning to predict battery aging trajectories from minimal initial data, thus facilitating effective performance grouping before deployment. Utilizing a derivative strategy and Gramian Angular Difference Field for dimensional enhancement, the MDIF model uncovers subtle predictive features from discharge curve data after only ten cycles. The architecture includes a parallel convolutional neural network with lateral connections to enhance feature integration and *** on a self-developed dataset, the model achieves an average root-mean-square error of 0.047 Ah and an average mean absolute percentage error of 1.60%, demonstrating high precision and *** robustness is further validated through transfer learning on two publicly available datasets, adapting with minimal retraining. This approach significantly reduces the testing cycles required, lowering both time and costs associated with battery testing. By enabling precise battery behavior predictions with limited data, the MDIF model optimizes battery utilization and deployment strategies, enhancing system efficiency and sustainability.

关键词： Lithium-ion battery Battery prognostics Fusion model Convolutional neural network Transfer learning

Ammonia-induced CuO/13X for H_(2)S removal from simulated blast furnace gas at low temperature

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Green Energy & Environment 2025年第1期10卷 139-149页

作者： Erping Cao Yuhua Zheng Hao zhang Jianshan Wang Yuran Li Tingyu Zhu zhan-guo zhang Guangwen Xu Yanbin Cui State Key Laboratory of Mesoscience and Engineering Institute of Process EngineeringChinese Academy of SciencesBeijing100190China State Key Laboratory of Vanadium and Titanium Resources Comprehensive Utilization PanGang Group Research Institute Co.Ltd.Panzhihua Sichuan617000China Shenyang University of Chemical Technology Shenyang110142China University of Chinese Academy of Sciences Beijing 100049China

Blast furnace gas(BFG)is an important by-product energy for the iron and steel industry and has been widely used for heating or electricity ***,the undesirable contaminants in BFG(especially H_(2)S)generate harmful environmental *** desulfurization of BFG is urgent for integrated steel plants due to the stringent ultra-low emission *** with other desulfurization materials,zeolite-based adsorbents represent a viable option with low costs and long service *** this study,an ammonia-induced CuO modified 13X adsorbent(NH3–CuO/13X)was prepared for H_(2)S removal from simulated BFG at low *** XRD,H_(2)-TPR and TEM analysis proved that smaller CuO particles were formed and the dispersion of Cu on the surface of 13X zeolite was improved via the induction of *** on H_(2)S adsorption performance of the adsorbent was carried out using simulated BFG,and the results showed that NH3–CuO/13X-3 has better breakthrough sulfur capacity,which was more than twice the sulfur capacity of CuO/*** is proposed that the enhanced desulfurization performance of NH3–CuO/13X is attributed to an abundant pore of 13X,and combined action of 13X and *** work provided an effective way to improve the sulfur capacity of zeolite-based adsorbents via impregnation method by ammonia induction.

关键词： Blast furnace gas Desulfurization Ammonia-induced CuO 13X zeolite

An embedded electron current layer observed at the edge of the plasma sheet in the Earth’s magnetotail

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Earth and Planetary Physics 2025年第1期9卷 148-158页

作者： ChenChen zhan RongSheng Wang QuanMing Lu San Lu XinMin Li Deep Space Exploration Laboratory/School of Earth and Space Sciences University of Science and Technology of ChinaHefei 230026China Chinese Academy of Sciences(CAS)Center for Excellence in Comparative Planetology/CAS Key Laboratory of Geospace Environment/Anhui Mengcheng National Geophysical Observatory University of Science and Technology of ChinaHefei 230026China Collaborative Innovation Center of Astronautical Science and Technology Harbin 150001China

The formation of an embedded electron current sheet within the magnetotail plasma sheet has been poorly *** this article,we present an electron current layer detected at the edge of the magnetotail plasma *** ions were demagnetized inside the electron current layer,but the electrons were still frozen in with the magnetic field ***,this decoupling of ions and electrons gave rise to a strong Hall electric field,which could be the reason for the formation of the embedded thin current *** magnetized electrons,the absence of the nongyrotropic electron distribution,and negligible energy dissipation in the layer indicate that magnetic reconnection had not been triggered within the embedded thin current *** highly asymmetric plasma on the two sides of the current layer and low magnetic shear across it could suppress magnetic *** observations indicate that the embedded electric current layer,probably generated by the Hall electric field,even down to electron scale,is not a sufficient condition for magnetic reconnection.

关键词： magnetotail plasma sheet magnetic reconnection

黑果枸杞基因组SSR标记开发及遗传多样性分析

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西北农林科技大学学报（自然科学版） 2021年第1期49卷 126-135页

作者：黄兴发尹跃赵建华姚佳依秦小雅汪淑芬曹有龙战祥强西北农林科技大学园艺学院陕西杨凌712100 宁夏农林科学院国家枸杞工程技术研究中心宁夏银川750002

【目的】开发黑果枸杞基因组SSR标记并验证其有效性,为黑果枸杞SSR分子开发应用提供依据。【方法】利用Illumina Hiseq 2500测序平台对2年生的黑果枸杞Lr-01无性系的基因组进行PE150测序,用MISA软件对获得的基因组序列进行检索与分析。... 详细信息

【目的】开发黑果枸杞基因组SSR标记并验证其有效性,为黑果枸杞SSR分子开发应用提供依据。【方法】利用Illumina Hiseq 2500测序平台对2年生的黑果枸杞Lr-01无性系的基因组进行PE150测序,用MISA软件对获得的基因组序列进行检索与分析。在此基础上,以18份宁夏枸杞、1份中国枸杞、23份黑果枸杞和6份其他枸杞种质为供试材料,利用Primer 3.0设计SSR引物,进行SSR引物筛选和多样性验证。【结果】在黑果枸杞中共检索到2 326条Scaffolds,含有2 494个SSR位点,每5.29 kb就有1个SSR位点,优势重复基序为单核苷酸、二核苷酸和三核苷酸,分别占总SSR位点的59.18%,27.11%和11.75%。重复基元类型共21种,其中类型最多的为单核苷酸重复A/T,占总数的56.05%;其次为二核苷酸重复AT/AT,占总数的12.35%。从设计的SSR引物中,随机挑选合成150对引物进行PCR扩增,筛选出10对高多态性SSR引物,分析其在48份枸杞种质中遗传参数,结果共检测到186个等位基因,平均为19个;观察杂合度、期望杂合度和多态信息含量平均值分别为0.615,0.834和0.817。UPGMA聚类分析结果表明,48份枸杞种质被分为2个类群,其中类型Ⅰ包括23份种质,全部为黑果枸杞;类型Ⅱ包括25份种质,主要为宁夏枸杞。分析结果显示,48份枸杞种质群体结构和群体种质资源遗传结构均可分为2个类群,与聚类分析结果基本一致。【结论】通过高通量测序技术开发黑果枸杞SSR标记是一种简单而高效途径,这些SSR标记为黑果枸杞种质资源的遗传多样性分析及遗传图谱构建等研究提供了可靠的标记选择。

关键词：黑果枸杞基因组简单重复序列(SSR) 遗传多样性

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