检索结果-南通市图书馆

Rice science 2024年第3期31卷 317-327,I0042-I0045页

作者： LI Dian DUAN Wenjing LIU Qun’en WU Weixun ZHAN Xiaodeng SUN Lianping zhang yingxin CHENG Shihua State Key Laboratory of Rice Biology and Breeding China National Rice Research InstituteHangzhou 310006China

Accurate genomic information is essential for advancing genetic breeding research in specific rice varieties.This study presented a gapless genome assembly of the indica rice cultivar Zhonghui 8015(ZH8015)using Pac Bio HiFi,Hi-C,and ONT(Oxford Nanopore Technologies)ultra-long sequencing technologies,annotating 43037 gene structures.Subsequently,utilizing this genome along with transcriptomic and metabolomic techniques,we explored ZH8015's response to brown planthopper(BPH)infestation.Continuous transcriptomic sampling indicated significant changes in gene expression levels around 48 h after BPH feeding.Enrichment analysis revealed particularly significant alterations in genes related to reactive oxygen species scavenging and cell wall formation.Metabolomic results demonstrated marked increases in levels of several monosaccharides,which are components of the cell wall and dramatic changes in flavonoid contents.Omics association analysis identified differentially expressed genes associated with key metabolites,shedding light on ZH8015's response to BPH infestation.In summary,this study constructed a reliable genome sequence resource for ZH8015,and the preliminary multi-omics results will guide future insect-resistant breeding research.

关键词： brown planthopper gapless genome genome assembly multi-omics Nilaparvata lugens rice

Impacts of algal blooms on sinking carbon flux and hypoxia off the Changjiang River estuary

在线全文

学校读者我要写书评

暂无评论

Journal of Oceanology and Limnology 2023年第6期41卷 2180-2196页

作者： Zhao LI yingxin zhang Shuqun SONG Caiwen LI School of Municipal and Environmental Engineering Shandong Jianzhu UniversityJinan 250101China CAS Key Laboratory of Marine Ecology and Environmental Sciences Institute of OceanologyChinese Academy of SciencesQingdao 266071China Marine Ecology and Environmental Science Laboratory Laoshan LaboratoryQingdao 266237China University of Chinese Academy of Sciences Beijing 100049China Center for Ocean Mega-Science Chinese Academy of SciencesQingdao 266071China

Based on 10 multidisciplinary investigations conducted from February 2015 to January 2016,the phytoplankton community and its association with ambient seawater physicochemical parameters in the Changjiang(Yangtze)River estuary(CE)and its adjacent waters were comprehensively examined.In total,265 taxa were identified,belonging to 5 phyla and 94 genera.Diatoms(63.78%)and dinoflagellates(33.21%)were the dominant groups.The variation of diatom abundance showed a positive relationship with the nutrient concentrations while the dinoflagellate abundance showed a negative relationship.Two algal bloom events occurred during the investigation period.The Changjiang Diluted Water(CDW)induced environmental gradients in the upper layer,favoring the diatom bloom in July.The invasion of the nearshore Kuroshio branch current could affect the formation of a bloom of Prorocentrum donghaiense.With the blooming and senescence of phytoplankton,low dissolved oxygen(DO)and hypoxia occurred in the bottom waters.The bottom DO concentration displayed a significantly negative correlation with phytoplankton carbon flux.The present study provides straightforward evidence for the source of organic matter for oxygen consumption in the CE and its adjacent waters.

关键词： phytoplankton community structure algal blooms carbon flux hypoxia

Diversity and seasonal variation of marine phytoplankton in Jiaozhou Bay, China revealed by morphological observation and metabarcoding

在线全文

学校读者我要写书评

暂无评论

Journal of Oceanology and Limnology 2022年第2期40卷 577-591页

作者： Tiantian CHEN yingxin zhang Shuqun SONG Yun LIU Xiaoxia SUN Caiwen LI CAS Key Laboratory of Marine Ecology and Environmental Sciences Institute of OceanologyChinese Academy of SciencesQingdao 266071China Laboratory of Marine Ecology and Environmental Science Qingdao National Laboratory for Marine Science and TechnologyQingdao 266200China Center for Ocean Mega-Science Chinese Academy of SciencesQingdao 266071China University of Chinese Academy of Sciences Beijing 100049China Jiaozhou Bay National Marine Ecosystem Research Station Chinese Academy of SciencesQingdao 266071China

Phytoplankton are central components of marine environments,and are major players in the production and respiration budgeting.However,their diversity and distribution patterns are still poorly understood due largely to their small sizes and inconspicuous morphology that have been determined via the application of traditional morphology methods over the past two decades.To better understand the composition and diversity of phytoplankton in Jiaozhou Bay,China,seasonal sampling was carried out in 2019 and samples were analyzed with morphological observations and high-throughput sequencing,from which obvious seasonal variations in phytoplankton composition and proportional abundances were uncovered.Metabarcoding revealed far more diversity and species richness of phytoplankton than morphological observations,especially with respect to dinofl agellates.Diatoms were the most dominant phytoplankton group throughout the year,of which Thalassionema and Skeletonema were co-dominant in the bay.Parasitic dinofl agellates(e.g.Amoebophrya),which is often overlooked in the morphological observations,were in dominance and high diversity in the metabarcoding dataset,thus more attention should be paid to exploring the potential role of parasitic dinofl agellates.Temperature,chlorophyll a,and nutrient levels were the main infl uential factors on the distribution of phytoplankton.This study provided a comprehensive morphological and molecular description of phytoplankton and clearly demonstrated the importance of molecular technology in exploring phytoplankton communities.More-widespread use of molecular technology will facilitate deeper understanding of the ecological importance of the diff erent species.

关键词： phytoplankton high-throughput sequencing diversity morphological observation Jiaozhou Bay

Optimization Strategies Toward Functional Sodium-Ion Batteries

在线全文

学校读者我要写书评

暂无评论

Energy & Environmental Materials 2023年第4期6卷 332-354页

作者： Jingwei Chen Gupta Adit Lun Li yingxin zhang Daniel H.C.Chua Pooi See Lee School of Materials Science and Engineering Ocean University of ChinaQingdao 266100China School of Materials Science and Engineering Nanyang Technological UniversitySingapore City 639798Singapore Department of Materials Science and Engineering National University of SingaporeSingapore City 117575Singapore

Exploration of alternative energy storage systems has been more than necessary in view of the supply risks haunting lithium-ion batteries.Among various alternative electrochemical energy storage devices,sodium-ion battery outstands with advantages of cost-effectiveness and comparable energy density with lithium-ion batteries.Thanks to the similar electrochemical mechanism,the research and development of lithium-ion batteries have forged a solid foundation for sodium-ion battery explorations.Advancements in sodium-ion batteries have been witnessed in terms of superior electrochemical performance and broader application scenarios.Here,the strategies adopted to optimize the battery components(cathode,anode,electrolyte,separator,binder,current collector,etc.)and the cost,safety,and commercialization issues in sodium-ion batteries are summarized and discussed.Based on these optimization strategies,assembly of functional(flexible,stretchable,self-healable,and self-chargeable)and integrated sodium-ion batteries(−actuators,−sensors,electrochromic,etc.)have been realized.Despite these achievements,challenges including energy density,scalability,trade-off between energy density and functionality,cost,etc.are to be addressed for sodium-ion battery commercialization.This review aims at providing an overview of the up-to-date achievements in sodium-ion batteries and serves to inspire more efforts in designing upgraded sodium-ion batteries.

关键词： energy storage integration multifunctional optimization strategies sodiumion batteries

Fine mapping and candidate gene analysis of qHD1b,a QTL that promotes flowering in common wild rice(Oryza rufipogon)by up-regulating Ehd1

在线全文

学校读者我要写书评

暂无评论

The Crop Journal 2022年第4期10卷 1083-1093页

作者： Ling Liu yingxin zhang Zhengfu Yang Qinqin Yang Yue zhang Peng Xu Jiaxin Li Anowerul Islam Liaqat Shah Xiaodeng Zhan Liyong Cao Shihua Cheng Weixun Wu China National Center for Rice Improvement and State Key Laboratory of Rice Biology China National Rice Research InstituteHangzhou 310006ZhejiangChina State Key Laboratory of Subtropical Silviculture Zhejiang A&F UniversityHangzhou 311300ZhejiangChina Northern Center of China National Rice Research Institute Hangzhou 310006ZhejiangChina

Heading date(flowering time)determines the adaptability of cultivars to different environments.We report the fine mapping and candidate gene analysis of qHD1b,a quantitative trait locus(QTL)responsible for early flowering that was derived from common wild rice(O.rufipogon)under both short-day and longday conditions.The introgression line IL7391,which carried segments from common wild rice in a Zhonghui 8015(ZH8015)background,exhibited early heading compared to the background and was crossed with ZH8015 to generate BC_(5)F_(2:3) families for QTL analysis.This enabled the identification of two heading-date QTL,named qHD1b and qHD7,of which the first was selected for further research.High-resolution linkage analysis was performed in BC_(5)F_(4:5) and BC_(5)F_(6) populations,and the location of qHD1b was confined to a 112.7-kb interval containing 17 predicted genes.Five of these genes contained polymorphisms in the promoter or coding regions and were thus considered as candidates.Expression analysis revealed a positive association between LOC_Os01g11940 expression and early heading.This locus was annotated as OsFTL1,which encodes an ortholog of Arabidopsis Flowering Locus T and was the most likely candidate gene for qHD1b.Our study revealed that qHD1b acts as a floral activator that promotes flowering by up-regulating Ehd1,Hd3a,RFT1,OsMADS14,and OsMADS15 under both shortday and long-day conditions.Field experiments showed that qHD1b affected several yield-related agronomic traits including 1000-grain weight and grain length.qHD1b could be useful for marker-assisted selection and breeding of early-maturing cultivars.

关键词： Rice Heading date Quantitative trait locus qHD1b Fine mapping

Identification of stable quantitative trait loci underlying waterlogging tolerance post-anthesis in common wheat(Triticum aestivum)

在线全文

学校读者我要写书评

暂无评论

The Crop Journal 2023年第4期11卷 1163-1170页

作者： Fugong Ding Jingyang Tong Rui Xu Jing Chen Xiaoting Xu Muhammad Nadeem Shuping Wang yingxin zhang Zhanwang Zhu Fengju Wang Zhengwu Fang Yuanfeng Hao MARA Key Laboratory of Sustainable Crop Production in the Middle Reaches of the Yangtze River(Co-construction by Ministry and Province) College of AgricultureYangtze UniversityJingzhou 434025HubeiChina National Wheat Improvement Centre Institute of Crop SciencesChinese Academy of Agricultural SciencesBeijing 100081China Queensland Alliance for Agriculture and Food Innovation The University of QueenslandSt LuciaQLD 4072Australia Food Crops Institute Hubei Academy of Agricultural SciencesWuhan 430064HubeiChina

Waterlogging is a growing threat to wheat production in high-rainfall areas.In this study,a doubled haploid(DH) population developed from a cross between Yangmai 16(waterlogging-tolerant) and Zhongmai895(waterlogging-sensitive) was used to map quantitative trait loci(QTL) for waterlogging tolerance using a high-density 660K single-nucleotide polymorphism(SNP) array.Two experimental designs,waterlogging concrete tank(CT) and waterlogging plastic tank(PT),were used to simulate waterlogging during anthesis in five environments across three growing seasons.Waterlogging significantly decreased thousand-kernel weight(TKW) relative to non-waterlogged controls,although the degree varied across lines.Three QTL for waterlogging tolerance were identified on chromosomes 4AL,5AS,and 7DL in at least two environments.All favorable alleles were contributed by the waterlogging-tolerant parent Yangmai16.QWTC.caas-4AL exhibited pleiotropic effects on both enhancing waterlogging tolerance and decreasing plant height.Six high-confidence genes were annotated within the QTL interval.The combined effects of QWTC.caas-4AL and QWTC.caas-5AS greatly improved waterlogging tolerance,while the combined effects of all three identified QTL(QWTC.caas-4AL,QWTC.caas-5AS,and QWTC.caas-7DL) exhibited the most significant effect on waterlogging tolerance.Breeder-friendly kompetitive allele-specific PCR(KASP) markers(K_AX_111523809,K_AX_108971224,and K_AX_110553316) flanking the interval of QWTC.caas-4AL,QWTC.caas-5AS,and QWTC.caas-7DL were produced.These markers were tested in a collection of 240 wheat accessions,and three superior polymorphisms of the markers distributed over 67elite cultivars in the test population,from the Chinese provinces of Jiangsu,Anhui,and Hubei.The three KASP markers could be used for marker-assisted selection(MAS) to improve waterlogging tolerance in wheat.

关键词： Genetic mapping QTL Waterlogging tolerance Wheat

Efficient adsorption of Mn(Ⅱ) by layered double hydroxides intercalated with diethylenetriaminepentaacetic acid and the mechanistic study

在线全文

学校读者我要写书评

暂无评论

Journal of Environmental Sciences 2019年第11期31卷 56-65页

作者： Mingjie Huang yingxin zhang Wei Xiang Tao Zhou Xiaohui Wu Juan Mao School of Environmental Science and Engineering Huazhong University of Science and Technology Wuhan 430074 China Key Laboratory of Water and Wastewater Treatment(HUST) MOHURD Wuhan 430074 China

In this study,greatly enhanced Mn(Ⅱ) adsorption was achieved by as-synthesized diethylenetriaminepentaacetate acid intercalated Mg/Al layered double hydroxides (LDHs-DTPA).The adsorption capacity of LDHs-DTPA was 83.5 mg/g,which is much higher than that of LDHs-EDTA (44.4 mg/g),LDHs-Oxalate (21.6 mg/g) and LDHs (28.8 mg/g).The adsorption data of aqueous Mn(Ⅱ) using LDHs-DTPA could be well described by the pseudosecond order kinetics and Langrnuir isotherm model.Thermodynamics study results also showed that the adsorption process of Mn(Ⅱ) by LDHs-DTPA was exothermic as indicated by the negative △H value.Furthermore,based on the structural,morphological and thermostable features,as well as FT-IR and XPS characterizations of LDHs-DTPA and the pristine LDHs,the adsorption mechanism of Mn(Ⅱ) was proposed.The carboxyl groups of DTPA were proposed to be the main binding sites for Mn(Ⅱ),and the hydroxyl groups of LDHs also played a minor role in the adsorption process.Among the three common regeneration reagents,0.1 mol/L Na2CO3 was the best for reusing LDHs-DTPA in Mn(Ⅱ) adsorption.Besides,the Mn(Ⅱ) adsorption performance could be hindered in the presence of typical inorganic ions,especially cations.Further specific modifications of LDHs-DTPA are suggested to get more selective adsorption of Mn(ll) in practical applications.

关键词： Layered double hydroxides Diethylenetriaminepentaacetate acid (DTPA) Mn(Ⅱ) Adsorption Inorganic ions

无地农民土地权益保障策略执行意愿的影响因素

在线全文

学校读者我要写书评

暂无评论

地域研究与开发 2024年第1期43卷 113-118,139页

作者：刘灵辉张迎新电子科技大学公共管理学院成都611731 中国人民大学公共管理学院北京100872

基于解构计划行为理论(DTPB)构建农民关于无地农民土地权益保障策略的心理认知影响执行意愿的理论模型,应用结构方程模型(SEM)对支配农民保障策略执行意愿的主观决策基础进行实证分析。结果表明:(1)感知价值与感知风险构成行为态度,进... 详细信息

基于解构计划行为理论(DTPB)构建农民关于无地农民土地权益保障策略的心理认知影响执行意愿的理论模型,应用结构方程模型(SEM)对支配农民保障策略执行意愿的主观决策基础进行实证分析。结果表明:(1)感知价值与感知风险构成行为态度,进而正向影响农民执行意愿。(2)上级影响与同伴影响化为主观规范,进而正向影响农民执行意愿。(3)便利条件与自我效能塑造感知行为控制,进而正向影响农民执行意愿。(4)在影响农民执行意愿的9个因素中,行为态度与主观规范的效应位居前列,起决定性作用。

关键词：无地农民 DTPB 保障策略执行意愿心理认知

在线全文

学校读者我要写书评

暂无评论

共同富裕愿景下农村土地捐赠问题研究

贵州师范大学学报（社会科学版） 2024年第3期 110-122页

作者：刘灵辉张迎新电子科技大学公共管理学院四川成都611731 中国人民大学公共管理学院北京100872

遵循第三次分配和共同富裕的理念与精神,创新地提出农村土地捐赠的概念。基于科学合理的激励机制,促使部分先富裕起来的农户将土地捐赠给本集体经济组织内低收入的无地少地农户,以达到先富带后富、促进共同富裕的目标。从此视角出发,构... 详细信息

遵循第三次分配和共同富裕的理念与精神,创新地提出农村土地捐赠的概念。基于科学合理的激励机制,促使部分先富裕起来的农户将土地捐赠给本集体经济组织内低收入的无地少地农户,以达到先富带后富、促进共同富裕的目标。从此视角出发,构建起农村土地捐赠的运行机制,在农村土地捐赠执行过程中可能面临着三个方面的问题:土地捐赠的参与主体不积极和捐赠数量不充分、土地捐赠的管理主体和监督主体不明确、捐赠土地的再利用方式不清晰。这些问题的形成原因主要包括:农村土地捐赠的法律政策不健全不完善、农村土地捐赠实施机构的选择面临着自治和法治的困局、农村土地捐赠激励机制的严重缺位、农村土地捐赠的社会氛围尚未形成。据此,提出四条对策建议以助力农村土地捐赠的实现:建立并完善农村土地捐赠的法律政策体系、组建高效联动的农村土地捐赠执行机构、构建多层次的农村土地捐赠激励机制、倡导先富带后富的农村土地捐赠社会氛围。

关键词：共同富裕第三次分配农村土地捐赠无地少地农户土地交回

Biosynthesis of poly-3-hydroxybutyrate with a high molecular weight by methanotroph from methane and methanol

同方期刊数据库博看期刊评论

在线全文

学校读者我要写书评

暂无评论

Journal of Natural Gas Chemistry 2008年第1期17卷 103-109页

作者： yingxin zhang Jiaying Xin Linlin Chen Hao Song Chungu Xia State Key Laboratory for Oxo Synthesis ＆ Selective Oxidation Lanzhou Institute of Chemical Physics Chinese Academy of Sciences Lanzhou 730000 China College of Food Engineering Harbin University of Commerce Harbin 150076 China Graduate University of Chinese Academy of Sciences Beijing 10039 China

Poly-3-hydroxybutyrate （PHB） can be produced by various species of bacteria. Among the possible carbon sources, both methane and methanol could be a suitable substrate for the production of PHB. Methane is cheap and plentiful not only as natural gas, but also as biogas. Methanol can also maintain methanotrophic activity in some conditions. The methanotrophic strain Methylosinus trichosporium IMV3011 can accumulate PHB with methane and methanol in a brief nonsterile process. Liquid methanol （0.1%） was added to improve the oxidization of methane. The studies were carried out using shake flasks. Cultivation was performed in two stages： a continuous growth phase and a PHB accumulation phase under the conditions short of essential nutrients （ammonium, nitrate, phosphorus, copper, iron （Ⅲ）, magnesium or ethylenediamine tetraacetate （EDTA）） in batch culture. It was found that the most suitable growth time for the cell is 144 h. Then an optimized culture condition for second stage was determined, in which the PHB concentration could be much increased to 0.6 g/L. In order to increase PHB content, citric acid was added as an inhibitor of tricarboxylic acid cycle （TCA）. It was found that citric acid is favorable for the PHB accumulation, and the PHB yield was increased to 40% （w/w） from the initial yield of 12% （w/w） after nutrient deficiency cultivation. The PHB produced is of very high quality with molecular weight up to 1.5 × 10^6Da.

关键词： poly-3-hydroxybutyrate methanotrophs methane methanol cultivation biosynthesis high molecular weight