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bZIP71 delays flowering by suppressing Ehd1 expression in rice

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Journal of Integrative Plant Biology 2022年第7期64卷 1352-1363页

作者： Xiufeng Li xiaojie tian Mingliang He Xinxin Liu Zhiyong Li Jiaqi Tang Enyang Mei Min Xu Yingxiang Liu Zhenyu Wang Qingjie Guan Wei Meng Jun Fang Jian Zhang Qingyun Bu Northeast Institute of Geography and Agroecology Key Laboratory of Soybean Molecular Design Breedingthe Chinese Academy ofSciencesHarbin 150081China University of Chinese Academy of Sciences Beijing 100049China College of Life Science Northeast Forestry UniversityHarbin 150040China Key Laboratory of Saline-alkali Vegetation Ecology Restoration(Northeast Forestry University) Ministry of EducationHarbin 150040China State Key Lab of Rice Biology China National Rice Research InstituteHangzhou 311400China The Innovative Academy of Seed Design the Chinese Academy of SciencesBeijing 100101China

Flowering time is a fundamental factor determining the global distribution and final yield of rice(Oryza sativa).Although diverse flowering time genes have been reported in this crop,the transcriptional regulation of its key flowering genes are poorly understood.Here,we report that a basic leucine zipper transcription factor,bZIP71,functions as a flowering repressor.The overexpression of bZIP71 delays flowering,while the bzip71 mutant flowers early in both long-day and short-day conditions.A genetic analysis showed that the regulation of flowering by bZIP71 might be independent of Heading date 2(Hd2),Hd4,and Hd5.Importantly,bZIP71 directly associates with the Early heading date 1(Ehd1)promoter and represses its transcription,and genetically the function of bZIP71 is impaired in the ehd1 mutant.Moreover,bZIP71 interacts with major components of polycomb repressive complex 2(PRC2),SET domain group protein 711(SDG711),and Fertilization independent endosperm 2(FIE2),through which bZIP71 regulates the H3K27me3 level of Ehd1.Taken together,we present a transcriptional regulatory mechanism in which bZIP71 enhances the H3K27me3 level of Ehd1 and transcriptionally represses its expression,which not only offers a novel insight into a flowering pathway,but also provides a valuable putative target for the genetic engineering and breeding of elite rice cultivars.

关键词： flowering time H3K27me3 rice transcriptional regulation

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超大采高液压支架支护安全特性研究

山东煤炭科技 2024年第5期42卷 115-119页

作者：田晓杰晋能控股装备制造集团大同机电装备有限公司中央机厂山西大同037001

针对燕子山矿12401工作面超大采高液压支架稳定性问题,通过建立超大采高液压支架群组-围岩耦合模型,利用模型分析工作面及顶板的不同因素对模型的力学影响,得到不同因素影响下支架立柱上端的顶板变形和支架支护强度的变化规律,进而得出... 详细信息

针对燕子山矿12401工作面超大采高液压支架稳定性问题,通过建立超大采高液压支架群组-围岩耦合模型,利用模型分析工作面及顶板的不同因素对模型的力学影响,得到不同因素影响下支架立柱上端的顶板变形和支架支护强度的变化规律,进而得出能有效适应工作面顶板变形的支护策略,分析工作面超大采高液压支架的强度特性,得出最高应力在液压支架上具有局部化以及区域化的特点。实际应用表明,可知理论值与试验值的误差较小,均在可接受范围内,非等强支护强度能有效控制顶板的变形,可以采用超大采高液压支架群组-围岩耦合模型来判断支架支护特性。

关键词：超大采高液压支架非等强支护

Oryza sativa mediator subunit OsMED25 interacts with OsBZR1 to regulate brassinosteroid signaling and plant architecture in rice

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Journal of Integrative Plant Biology 2020年第6期62卷 793-811页

作者： Yuekun Ren xiaojie tian Shuyu Li Enyang Mei Mingliang He Jiaqi Tang Min Xu Xiufeng Li Zhenyu Wang Chuanyou Li Qingyun Bu Northeast Institute of Geography and Agroecology Key Laboratory of Soybean Molecular Design BreedingChinese Academy of SciencesHarbin 150081China University of Chinese Academy of Sciences Beijing 100049China State Key Laboratory of Plant Genomics and National Center for Plant Gene Research(Beijing) Institute of Genetics and Developmental BiologyChinese Academy of SciencesBeijing 100101China The Innovative Academy of Seed Design Chinese Academy of SciencesBeijing 100101China

Brassinosteroids(BRs)are plant-specific steroid hormones which regulate plant growth,development,and adaptation.Transcriptional regulation plays key roles in plant hormone signaling.A mediator can serve as a bridge between gene-specific transcription factors and the RNA polymerase machinery,functioning as an essential component in regulating the transcriptional process.However,whether a mediator is involved in BR signaling is unknown.Here,we discovered that Oryza sativa mediator subunit 25(Os MED25)is an important regulator of rice BR signaling.Phenotypic analyses showed that the Os MED25-RNAi and osmed25 mutant presented erect leaves,as observed in BR-deficient mutants.In addition,the Os MED25-RNAi and osmed25 mutant exhibited decreased BR sensitivity.Genetic analysis indicated that Os MED25-RNAi could suppress the enhanced BR signaling phenotype of Osbzr1-D.Further biochemical analysis showed that Os MED25 interacts with Os BZR1 in vivo,and Os MED25 is enriched on the promoter of Os BZR1 target genes.RNA sequencing analysis indicated that Os MED25 affects the expression of approximately 45%of Os BZR1-regulated genes and mainly functions as a corepressor of Os BZR1.Together,these findings revealed that Os MED25 regulates rice BR signaling by interacting with Os BZR1 and modulating the expression of Os BZR1 target genes,thus expanding our understanding of the roles of mediators in plant hormone signaling.

关键词： plant Together analysis

Combinations of Hd2 and Hd4 genes determine rice adaptability to Heilongjiang Province, northern limit of China

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Journal of Integrative Plant Biology 2015年第8期57卷 698-707页

作者： Xiufeng Li Huazhao Liu Maoqing Wang Hualong Liu xiaojie tian Wenjia Zhou tianxiao Lü Zhenyu Wang Chengcai Chu Jun Fang Qingyun Bu Northeast Institute of Geography and Agroecology Key Laboratory of Soybean Molecular Design Breeding the Chinese Academy of Sciences University of Chinese Academy of Sciences Rice Research Institute Heilongjiang Academy of Land Reclamation Sciences Beidahuang Kenfeng Seed Co.Ltd. College of Agriculture Northeast Agricultural University State Key Laboratory of Plant Genomics Institute of Genetics and Developmental Biology Chinese Academy of Sciences

Heading date is a key trait in rice domestication and adaption, and a number of quantitative trait loci（QTLs）have been identified. The rice（Oryza sativa L.） cultivars in the Heilongjiang Province, the northernmost region of China,have to flower extremely early to fulfill their life cycle.However, the critical genes or different gene combinations controlling early flowering in this region have not been determined. QTL and candidate gene analysis revealed that Hd2/Ghd7.1/Os PRR37 plays a major role in controlling rice distribution in Heilongjiang. Further association analysis with a collection of rice cultivars demonstrated that another three major QTL genes（Hd4/Ghd7, Hd5/DTH8/Ghd8, and Hd1）also participate in regulating heading date under natural long day（LD） conditions. Hd2/Ghd7.1/Os PRR37 and Hd4/Ghd7 are two major QTLs and function additively. With the northward rice cultivation, the Hd2/Ghd7.1/Os PRR37 and Hd4/Ghd7 haplotypes became non-functional alleles. Hd1 might be non-functional in most Heilongjiang rice varieties,implying that recessive hd1 were selected during local rice breeding. Non-functional Hd5/DTH8/Ghd8 is very rare, but constitutes a potential target for breeding extremely early flowering cultivars. Our results indicated that diverse genetic combinations of Hd1, Hd2, Hd4, and Hd5 determined the different distribution of rice varieties in this northernmost province of China.

关键词： Rice heading date Hdl Hd2 Hd4 Hd5

OsMKKK70 regulates grain size and leaf angle in rice through the OsMKK4-OsMAPK6-OsWRKY53 signaling pathway

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Journal of Integrative Plant Biology 2021年第12期63卷 2043-2057页

作者： Zhiqi Liu Enyang Mei xiaojie tian Mingliang He Jiaqi Tang Min Xu Jiali Liu Lu Song Xiufeng Li Zhenyu Wang Qingjie Guan Qijiang Xu Qingyun Bu Key Laboratory of Saline-alkali Vegetation Ecology Restoration(Northeast Forestry University) Ministry of EducationHarbin 150040China College of Life Science Northeast Forestry UniversityHarbin 150040China Northeast Institute of Geography and Agroecology Key Laboratory of Soybean Molecular Design BreedingCASHarbin 150081China University of Chinese Academy of Sciences Beijing 100049China School of Laboratory Medicine Youjiang Medical University for NationalitiesBaise 533000China The Innovative Academy of Seed Design Chinese Academy of SciencesBeijing 100101China

Grain size and leaf angle are key agronomic traits that determine final yields in rice.However,the underlying molecular mechanisms are not well understood.Here we demonstrate that the Oryza sativa Mitogen Activated Protein Kinase Kinase Kinase OsMKKK70 regulates grain size and leaf angle in rice.Overexpressing OsMKKK70 caused plants to produce longer seeds.The osmkkk62/70 double mutant and the osmkkk55/62/70 triple mutant displayed significantly smaller seeds and a more erect leaf angle compared to the wild type,indicating that OsMKKK70 functions redundantly with its homologs Os MKKK62 and Os MKKK55.Biochemical analysis demonstrated that OsMKKK70 is an active kinase and that OsMKKK70 interacts with Os MKK4 and promotes Os MAPK6 phosphorylation.In addition,the osmkkk62/70 double mutant showed reduced sensitivity to Brassinosteroids(BRs).Finally,overexpressing constitutively active Os MKK4,Os MAPK6,and Os WRKY53 can partially complement the smaller seed size,erect leaf,and BR hyposensitivity of the osmkkk62/70 double mutant.Taken together,these findings suggest that OsMKKK70 might regulate grain size and leaf angle in rice by activating Os MAPK6 and that OsMKKK70,Os MKK4,Os MAPK6,and Os WRKY53 function in a common signaling pathway that controls grain shape and leaf angle.

关键词： Brassinosteroids MAPK signaling OsMKKK70 rice seed size

High-efficiency breeding of early-maturing rice cultivars via CRISPR/Cas9-mediated genome editing

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Journal of Genetics and Genomics 2017年第3期44卷 175-178页

作者： Xiufeng Li Wenjia Zhou Yuekun Ren xiaojie tian tianxiao Lv Zhenyu Wang Jun Fang Chengcai Chu Jie Yang Qingyun Bu Northeast Institute of Geography and Agroecology Key Laboratory of Soybean Molecular Design BreedingChinese Academy of SciencesHarbin 150081China Graduate University of Chinese Academy of Sciences Beijing 100049China State Key Laboratory of Plant Genomics Institute of Genetics and Developmental BiologyChinese Academy of SciencesBeijing 100101China Institute of Food Crops Jiangsu Academy of Agricultural SciencesNanjing 210014China

Rice is a staple food for more than half of the human population.It has been estimated that by 2030,40%more rice needs to be produced in order to meet the growing demand（Khush,2005）.One of the strategies to improve rice productivity is to enlarge rice growth areas, such as the northward expansion of the growth region in Heilongjiang Province, the northernmost region of China （Li et al., 2015）. However, the northward cultivation is accompanied with daylength extension and temperature decrease, which are unfavor- able for rice, a tropical short-day plant, to complete flowering and seed setting. Thus, the need for early-maturing rice cultivars with extremely low photoperiod sensitivity is urgent.

关键词： In than High-efficiency breeding of early-maturing rice cultivars via CRISPR/Cas9-mediated genome editing

Microwave-assisted pyrolysis of vegetable oil soapstock:Comparative study of rapeseed,sunflower,corn,soybean,rice,and peanut oil soapstock

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International Journal of Agricultural and Biological Engineering 2019年第6期12卷 202-208页

作者： Yunpu Wang Shumei Zhang Qiuhao Wu Dengle Duan Yuhuan Liu Roger Ruan Guiming Fu Leilei Dai Lin Jiang Zhenting Yu Zihong Zeng xiaojie tian Xiuhua Yang State Key Laboratory of Food Science and Technology Nanchang UniversityNanchang 330047China Engineering Research Center for Biomass Conversion Ministry of EducationNanchang UniversityNanchang 330047China Center for Biorefining and Department of Bioproducts and Biosystems Engineering University of Minnesota St.PaulMN 55108USA Department of Biological Systems Engineering Washington State UniversityRichlandWA 99354USA

In this study,the effects of catalytic temperature and the type of soapstock on products from microwave-assisted pyrolysis were investigated.HZSM-5 was used as the catalyst to study the pyrolysis of six different soapstocks at 200℃,300℃,and 400℃ catalytic temperature.Results showed that the bio-oil yields initially increased and then decreased with the increase in catalytic temperature.When the catalytic temperature was 300℃,the bio-oil reached up to the maximum value(65.8 wt.%).Findings indicated that the composition of bio-oil was related to the degree of unsaturation of fatty acids sodium in the soapstocks.In the case of saturated fatty acid sodium,a series of alkanes was formed,whereas the pyrolysis of monounsaturated fatty acid sodium resulted mainly in cycloalkanes,the cycloalkenes obtained from bio-oil was produced by polyunsaturated fatty acid sodium.

关键词： microwave pyrolysis vegetable oil soapstock HZSM-5 bio-oil

Co-pyrolysis of Sewage Sludge with Paint Sludge: Kinetics and Thermodynamic Analysis via Iso-conversional Methods

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Journal of Wuhan University of Technology(Materials Science) 2024年第3期39卷 716-727页

作者：周尚群赵青林 YU tian YAO xiaojie State Key Laboratory of Silicate Materials for Architectures Wuhan University of TechnologyWuhan 430070China School of Mate-rials Science and Engineering Wuhan University of TechnologyWuhan 430070China

This study explored the synergistic interaction of sewage sludge(SS)and automotive paint sludge(PS)during co-pyrolysis for the optimized treatment of sewage sludge in cement kiln systems,utilizing thermogravimetric analysis(TGA)and thermogravimetric-mass spectrometry(TGA-MS).The result reveals the coexisting synergistic and antagonistic effects in the co-pyrolysis of SS/PS.The synergistic effect arises from hydrogen free radicals in SS and catalytic components in PS,while the main source of the antagonistic effect is that,during the mechanical mixing process,the SS/PS is converted from the particulate form into a dough-like rubbery which contributes to the film-forming effect,hindering the volatilization of volatile components.SS/PS co-pyrolysis reduces the yielding of tar production while increasing coke and gas.This study will provide some in-depth insights into the co-pyrolysis of SS/PS,and offer theoretical support for the subsequent research on the collaborative disposal processes in cement kilns.

关键词： sewage sludge co-pyrolysis automotive paint sludge evolved gas analysis

More Than Lightening:A Self-Supervised Low-Light Image Enhancement Method Capable for Multiple Degradations

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IEEE/CAA Journal of Automatica Sinica 2024年第3期11卷 622-637页

作者： Han Xu Jiayi Ma Yixuan Yuan Hao Zhang Xin tian xiaojie Guo the Electronic Information School Wuhan UniversityWuhan 430072China IEEE the Department of Electronic Engineering Chinese University of Hong KongHong Kong 999077China the College of Intelligence and Computing Tianjin UniversityTianjin 300350China

Low-light images suffer from low quality due to poor lighting conditions,noise pollution,and improper settings of cameras.To enhance low-light images,most existing methods rely on normal-light images for guidance but the collection of suitable normal-light images is difficult.In contrast,a self-supervised method breaks free from the reliance on normal-light data,resulting in more convenience and better generalization.Existing self-supervised methods primarily focus on illumination adjustment and design pixel-based adjustment methods,resulting in remnants of other degradations,uneven brightness and artifacts.In response,this paper proposes a self-supervised enhancement method,termed as SLIE.It can handle multiple degradations including illumination attenuation,noise pollution,and color shift,all in a self-supervised manner.Illumination attenuation is estimated based on physical principles and local neighborhood information.The removal and correction of noise and color shift removal are solely realized with noisy images and images with color shifts.Finally,the comprehensive and fully self-supervised approach can achieve better adaptability and generalization.It is applicable to various low light conditions,and can reproduce the original color of scenes in natural light.Extensive experiments conducted on four public datasets demonstrate the superiority of SLIE to thirteen state-of-the-art methods.Our code is available at https://***/hanna-xu/SLIE.

关键词： Color correction low-light image enhancement self-supervised learning.