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Increased long-distance and homo-trans interactions related to H3K27me3 in Arabidopsis hybrids

Journal of Integrative Plant Biology 2024年第2期66卷 208-227页

作者： Zhaoxu Gao Yanning Su Le Chang Guanzhong Jiao Yang Ou Mei Yang Chao Xu Pengtao Liu Zejia Wang Zewen Qi Wenwen Liu linhua sun Guangming He Xing Wang Deng Hang He School of Advanced Agriculture Sciences and School of Life Sciences State Key Laboratory of Protein and Plant Gene ResearchPeking UniversityBeijing 100871China College of Grassland Science Beijing Forestry UniversityBeijing 100083China Peking University Institute of Advanced Agricultural Sciences Shandong Laboratory of Advanced Agricultural Sciences in WeifangWeifang 261325China

In plants,the genome structure of hybrids changes compared with their parents,but the effects of these changes in hybrids remain *** reciprocal crosses between Col×C24 and C24×Col in Arabidopsis using high-throughput chromosome conformation capture assay(Hi-C)analysis,we found that hybrid three-dimensional(3D)chromatin organization had more long-distance interactions relative to parents,and this was mainly located in promoter regions and enriched in genes with heterosis-related *** interactions between euchromatin and heterochromatin were increased,and the compartment strength decreased in *** compartment domain(CD)boundaries,the distal interactions were more in hybrids than their *** the hybrids of CURLY LEAF(clf)mutants clfCol×clfC24and clfC24×clfCol,the heterosis phenotype was damaged,and the long-distance interactions in hybrids were fewer than in their parents with lower ***-seq data revealed higher levels of H3K27me3 in the region adjacent to the CD boundary and the same interactional homo-trans sites in the wild-type(WT)hybrids,which may have led to more long-distance *** addition,the differentially expressed genes(DEGs)located in the boundaries of CDs and loop regions changed obviously in WT,and the functional enrichment for DEGs was different between WT and clf in the longdistance interactions and loop *** findings may therefore propose a new epigenetic explanation of heterosis in the Arabidopsis hybrids and provide new insights into crop breeding and yield increase.

关键词： 3D chromatin organization H3K27me3 homo-trans hybrids long-distanceinteractions

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Environmental baseline evaluation of lead in shallow groundwater based on statistical and spatial outlier identification

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Chinese Journal Of Geochemistry 2015年第3期34卷 416-421页

作者： linhua sun School of Resources and Civil Engineering Suzhou University

A series of methods have been applied for evaluating the environmental baseline—especially on a regional scale—because of its importance for local environmental management. However, most of the methods have been statistical in nature, and spatial variability has not been considered simultaneously. In this study, the combined use of statistical and spatial methods has been carried out to analyse lead concentrations in the shallow groundwater in the urban area of Suzhou, northern Anhui Province, China. The environmental baseline of lead in the shallow groundwater has been evaluated to be3.836–8.240 lg/l after removal of either statistical or spatial outliers. The results are similar to those obtained by model-based objective methods, and further demonstrate that the combination method is more reasonable for environmental baseline evaluation.

关键词：地下水环境浅层地下水和空间基线统计评价识别环境管理

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单块浮冰在风浪流作用下的运动响应数值模拟

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水动力学研究与进展（A辑） 2024年第3期39卷 452-462页

作者：王亦晗孙林华倪宝玉哈尔滨工程大学船舶工程学院哈尔滨150001

随着全球气候变暖,冰缘区的浮冰数量逐渐增加,会对极地区域运行和作业的海洋结构物形成潜在威胁。为了更好地研究和预报冰缘区中的浮冰在环境载荷作用下的响应特性,该文对风浪流环境下的单块浮冰运动响应进行了数值模拟,分别研究了风拖... 详细信息

随着全球气候变暖,冰缘区的浮冰数量逐渐增加,会对极地区域运行和作业的海洋结构物形成潜在威胁。为了更好地研究和预报冰缘区中的浮冰在环境载荷作用下的响应特性,该文对风浪流环境下的单块浮冰运动响应进行了数值模拟,分别研究了风拖曳工况、流拖曳工况、风浪联合作用以及波流联合作用等不同情况下的浮冰运动响应特性。在风或流的拖曳作用下,浮冰的漂移可分为初始加速和稳定漂移两个阶段,其中初始加速阶段浮冰的迎流侧出现明显的低压区,浮冰垂荡运动与纵摇运动存在相互耦合的特性。对于风或流与波浪联合作用的情况,该文采用了一种叠加波浪引起的漂移速率与拖曳引起的漂移速率的线性方法,估算了浮冰在联合作用环境下的漂移速率,此线性估算方法在风速小于7 m/s的情况下或流速低于0.08 m/s的情况下总体吻合较好。此外,该文还分析了风、流与波浪联合作用环境下浮冰纵荡、纵摇与垂荡三自由度的运动特性,并通过浮冰的漂移速率估算了波浪与浮冰的遭遇周期,其结果在风速与流速较低的情况下与数值模拟得到的浮冰各自由度运动周期结果吻合较好。

关键词：浮冰风浪流运动响应数值模拟

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Geochemistry of sandstones from the Neoproterozoic Jinshanzhai Formation in northern Anhui Province, China: Provenance, weathering and tectonic setting

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Chinese Journal Of Geochemistry 2013年第1期32卷 95-103页

作者： sun linhua GUI Herong CHEN Song School of Earth Science and Engineering Suzhou University

Sandstones from the Neoproterozoic Jinshanzhai Formation in northern Anhui Province, China, were analyzed for major oxides and trace elements to infer their provenance, the intensity of paleo-weathering of their source rocks and the depositional tectonic setting. Diagrams of (SiO2/20)-(Na2O+K2O)-(MgO+TiO2+FeO*), TiO2-Ni, Th-Hf-Co, Hf-La/Th and some ratios of elements indicate that felsic rocks constitute the source rocks in the provenance. The values of Chemical Index of Alteration (CIA) are low, which are considered to be affected by K-metasomatism. Whereas the high CIW (Chemical Index of Weathering) values indicate intensive weathering of the source material. Plots of sandstones on bivariate and triangle discriminant diagrams, as well as ICV (Index of Compositional Variation) values revealed that they were deposited on a passive continental margin or in an intra-plate basin. Our recent study, in combination with previous studies and the research progress of the Rodinia super continent, demonstrated that the convergence and extension of the Rodinia super continent were preserved by twice extension as expressed by petrological variation of the southeastern margin of the North China Craton (NCC) during the Neoproterozoic.

关键词：沉积构造背景中国北方新元古代地球化学特征安徽省 Rodinia超大陆砂岩耐候性

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Geochemical characteristics of REE in the Late Neo-proterozoic limestone from northern Anhui Province, China

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Chinese Journal Of Geochemistry 2014年第2期33卷 187-193页

作者： CHEN Song GUI Herong sun linhua School of Earth Sciences and Engineering Suzhou University School of Resource and Earth Science CUMT

Ten representative limestone samples [six from Wangshan Formation(WL) and the other four from Gouhou Formation(GL)] were collected from outcrops of the northern Anhui Province, and REE concentrations in limestone were measured by ICP-MS. The depositional environment and source of the REE were analyzed, and the results implys that the total REE of samples are low compared with the recent marine sediments, which range from 9.61 to 54.18 mg/kg and an average of 22.93 mg/kg. The PAAS-normalized REE+Y patterns of limestone are characterized by(1) light REE depletion in WL and enrichment in GL with the values of(Nd/Yb)SN ranging form 0.65 to 0.91 and 1.12 to 1.46, respectively;(2) light negative Ce anomaly(0.85–1.02) and positive La anomaly(0.92–1.27); and(3) both Eu(0.91–1.23) and Y(1.42–2.38) expressing light positive anomaly. The character indicated that the depositional environment was oxygenated, with infection by the hydrothermal activity and contamination of detritus.

关键词：稀土元素灰岩样品地球化学特征安徽省晚新元古代中国 ICP-MS Ce异常

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Rare earth element geochemistry of groundwater from a deep seated sandstone aquifer,northern Anhui province,China

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Mining Science and Technology 2011年第4期21卷 477-482页

作者： Gui Herong sun linhua Chen Luwang Chen Song School of Earth Sciences and Engineering Suzhou Universing Suzhou 234000 China School of Resources and Environmental Engineering Hefei University of Technology Hefei 230009 China

Deep coal mines in northern Anhui province, China, provide opportunities for tracing the distribution and fractionation of rare earth elements CREEs） in deep seated environments. Major ions, as well as REE concentrations were measured in groundwater from a sandstone aquifer located between -400 and -280 m. Our results indicate that this groundwater consists of ***-Na or ***3-Na water types with warm temperature （30.1-31.4~C）, circumneutral pH （7.27-8.61） and high levels of total dissolved solids （TDS ~ 1306--2165 mg/L）. Concentrations of REEs in groundwater are high as expressed by their Nd con- centrations （0.0086-0.018μg/L）. Except for weak heavy REEs （HREE） enrichment relative to light REEs （LREE）, the similarity of REE distribution patterns between groundwater and aquifer rock indicate that enrichment of REEs is considered to be controlled by aquifer rock, as well as by their minerals, whereas the fractionation of REEs is controlled by HREE enriched minerals and, to a lesser extent, by inorganic REE complexes. Ce anomalies normalized to Post Archean Average Shale （PAAS） and aquifer rock are weak, which probably reflect the contribution of reduced conditions in combination with pH, rather than a sig- nature of aouifer rock.

关键词： Rare earth elements Water-rock interaction Sandstone aquifer Groundwater

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Geochemical characteristics and geological significance of the Neoproterozoic carbonates from northern Anhui Province, China

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Chinese Journal Of Geochemistry 2011年第1期30卷 40-50页

作者： sun linhua GUI Herong CHEN Song MA Yanping HE Zhenyu Department of Geographical and Environmental Sciences Suzhou University Suzhou 234000 China State Key Laboratory of Mineral Deposit Research Department of Earth Sciences Nanjing University Nanjing 210093 China

Petrographical and geochemical studies were carried out of the Neoproterozoic carbonates from northern Anhui Province, China. These carbonates can be subdivided into two types, including purified limestone (PL) and mixed limestone and siliclastic rocks (MLS). PLs are low in Si, Al, Zr and total REE but high in CaO compared with MLSs. Correlations between Zr, Fe2O3, P2O5 and total REE are also less remarkable, indicating that they were not obviously contaminated by continental materials but directly precipitated from seawater. So they can be used for the inversion of paleo-seawater REE patterns. The inversed results indicated that the REE pattern of Neoproterozoic seawater was similar to that of the modern seawater except for the lack of Ce depletion, which was probably affected by the reduced hydrothermal solution. In combination with previous studies, the geochemical trending of these carbonatic samples towards the continental arc in the La- Th-Sc and Th-Sc-Zr/10 diagrams is interpreted as the contamination of arc volcanism. The tectonic background of the southern margin of the North China Craton in the Neoproterozoic was probably related to the Grenville orogeny during the convergence of the Rodinia supercontinent, rather than an intra-plate environment.

关键词：中新元古代碳酸盐岩地球化学安徽省地质意义中国 Rodinia超大陆特征和

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Conserved H3K27me3-associated chromatin looping mediates physical interactions of gene clusters in plants

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Journal of Integrative Plant Biology 2023年第8期65卷 1966-1982页

作者： linhua sun Yuxin Cao Zhu Li Yi Liu Xiaochang Yin Xing Wang Deng Hang He Weiqiang Qian National Key Laboratory of Wheat Improvement Peking University Institute of Advanced Agricultural SciencesShandong Laboratory of Advanced Agricultural Sciences in WeifangWeifang 261325China School of Advanced Agriculture Sciences Peking UniversityBeijing 100871China School of Plant Science and Food Security Tel Aviv UniversityTel Aviv 6997801Israel

Higher-order chromatin organization is essential for transcriptional regulation,genome stability maintenance,and other genome *** evidence has revealed significant differences in 3D chromatin organization between plants and ***,the extent,pattern,and rules of chromatin organization in plants are still *** this study,we systematically identified and characterized long-range chromatin loops in the Arabidopsis 3D *** identified hundreds of long-range cis chromatin loops and found their anchor regions are closely associated with H3K27me3 epigenetic ***,we demonstrated that these chromatin loops are dependent on Polycomb group(PcG)proteins,suggesting that the Polycomb repressive complex2(PRC2)complex is essential for establishing and maintaining these novel *** most of these PcG-medicated chromatin loops are stable,many of these loops are tissue-specific or dynamically regulated by different ***,tandemly arrayed gene clusters and metabolic gene clusters are enriched in anchor ***-range H3K27me3-marked chromatin interactions are associated with the coregulation of specific gene ***,we also identified H3K27me3-associated chromatin loops associated with gene clusters in Oryza sativa and Glycine max,indicating that these long-range chromatin loops are conserved in *** results provide novel insights into genome evolution and transcriptional coregulation in plants.

关键词： Arabidopsis gene clusters Hi-C long-range chromatin loops H3K27me3

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Nitrogen starvation induces genome-wide activation of transposable elements in Arabidopsis

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Journal of Integrative Plant Biology 2022年第12期64卷 2374-2384页

作者： Yue Wang Yi Liu Shaofeng Qu Wenjie Liang linhua sun Dong Ci Zhitong Ren Liu-Min Fan Weiqiang Qian State Key Laboratory of Protein and Plant Gene Research School of Advanced Agricultural SciencesPeking UniversityBeijing 100871China School of Life Sciences Peking UniversityBeijing 100871China Peking University Institute of Advanced Agricultural Sciences Weifang 261000China

Nitrogen(N)availability is a major limiting factor for plant growth and agricultural *** the gene regulation network in response to N starvation has been extensively studied,it remains unknown whether N starvation has an impact on the activity of transposable elements(TEs).Here,we report that TEs can be transcriptionally activated in Arabidopsis under N starvation *** genetic screening of idm1-14 suppressors,we cloned GLU1,which encodes a glutamate synthase that catalyzes the synthesis of glutamate in the primary N assimilation *** found that glutamate synthase 1(GLU1)and its functional homologs GLU2 and glutamate transport 1(GLT1)are redundantly required for TE silencing,suggesting that N metabolism can regulate TE *** and methylome analyses revealed that N starvation results in genome-wide TE activation without inducing obvious alteration of DNA *** analysis indicated that N starvationinduced TE activation is also independent of other well-established epigenetic mechanisms,including histone methylation and heterochromatin *** results provide new insights into the regulation of TE activity under stressful environments in planta.

关键词： DNA methylation glutamate synthase nitrogen starvation transcriptional gene silencing transposable element

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Geochemistry of Neoproterozoic mixosedimentite in northern Anhui and its geological significance

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Global Geology 2010年第3期13卷 128-134页

作者： sun linhua GUI Herong CHEN Song School of Earth Sciences and Engineering Sttzhou University Suzhou 234000 Anhui China

Major oxides,as well as trace elements (including rare earth elements) compositions have been analyzed for the mixosedimentites from Neoproterozoic Jiayuan Formation in northern Anhui,China. The results show that the concentrations of elements are closely related to the relative proportions of carbonates and terrigenous detritus (varying from 2/3 to 1/9 based on petrographic study). The ratios between some immobile elements (e.g. La,Th,Zr and Sc) are constant and then can be used as tracers for the discrimination of provenance and tectonic setting of terrigenous detritus. The results indicate that the terrigenous detritus mainly came from the felsic volcanics related to continental arc,with minor contribution from the old basement. Combined with recent research progresses,these mixosedimentites imply that the Neoproterozoic sedimentation in northern Anhui was probably taken place in a back arc basin during the convergence of Rodinia super continent between 1.0 and 0.8 Ga.

关键词： provenance tectonic setting mixosedimentites Neoproterozoic northern Anhui

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