检索结果-南通市图书馆

How competitive is the‘pioneer-climax’tree species Nothofagus alpina in pristine temperate forests of Chile?

Journal of Plant Ecology 2019年第1期12卷 144-156页

作者： Rebekka Bögelein Cecilia APérez Philipp Schäferand Frank M.thomas Faculty of Regional and Environmental Sciences GeobotanyUniversity of TrierBehringstraße 2154296 TrierGermany Present address:Thünen-Institut Institut für WaldökosystemeAlfred-Möller-Straße 116225 EberswaldeGermany Departamento de Ecología de Ecosistemas Instituto de Ecología y Biodiversidad(IEB)Alameda 340SantiagoChile

Aims Nothofagus species are constitutive elements of the temperate forests along the Southern Andes Mountains.the deciduous Nothofagus alpina is a fast-growing,but long-lived opportunistic pioneer spe-cies(‘pioneer-climax species’)and co-occurs with the evergreen N.dombeyi.We tested whether N.alpina is competitively superior to N.dombeyi in mature stands and whether intra-specific competition in N.alpina is stronger than inter-specific competition with N.dombeyi.Methods In a pristine old-growth forest in South-Central Chile,we compared the growth of N.alpina trees in pure stands and in mixture with N.dombeyi to the growth of N.dombeyi and calculated compe-tition indices.We related growth variables to climate data and weather extremes.Important Findings In N.alpina,juvenile basal area increment was signifi-cantly higher in pure than in mixed stands.Contrary to our hypothesis,N.dombeyi exhibited larger radial stem increments than N.alpina in the most recent 40 years.In the most recent two decades,this was caused by high growth rates of large N.dombeyi trees.In both Nothofagus species,stem growth was negatively related to temperature,but N.dombeyi responded more sensitively to weather conditions than N.alpina.In N.alpina,stem increment was negatively related to the intensity of competition,but the size of the competition effects on this species was similar in pure and mixed stands.thus,compared to N.alpina,the‘pioneer-climax species’concept is even more appropriate for N.dombeyi with its relatively high growth rates even in the early stages of its life.

关键词： competition index dendroecology growth-competition relationship pointer year productivity tree-ring analysis

来源：

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Identification of Arabidopsis MYB56 as a Nove Substrate for CRL3BPM E3 Ligases

引用

Molecular Plant 2015年第2期8卷 242-250页

作者： Liyuan Chen Anne Bernhardt JooHyun Lee Hanjo Hellmann School of Biological Sciences Washington State University Abelson 435 Pullman WA 99164-4236 USA present address: Plant Gene Expression Center UC Berkeley Albany CA 94710 USA present address: Robert Koch institut 13353 Berlin Germany

Controlled stability of proteins is a highly efficient mechanism to direct diverse processes in living cells. A key regulatory system for protein stability is given by the ubiquitin proteasome pathway, which uses E3 ligases to mark specific proteins for degradation. In this work, MYB56 is identified as a novel target of a CULLIN3 （CUL3）-based E3 ligase. Its stability depends on the presence of MAth-BTB/POZ （BPM） proteins, which function as substrate adaptors to the E3 ligase. Genetic studies have indicated that MYB56 is a negative regulator of flowering, while BPMs positively affect this developmental program. the interaction between BPMs and MYB56 occurs at the promoter of FLOWERING LOCUS T （FT）, a key regulator in initiating flowering in Arabidopsis, and results in instability of MYB56. Overall the work establishes MYB transcription factors as substrates of BPM proteins, and provides novel information on components that participate in controlling flowering time in plants.

关键词： CUL3 BPM MYB transcription factor E3 ligase flowering

来源：

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Occupancy of avian foraging guilds in soybean fields and borders in Entre Ríos, Argentina: responses to vegetation structure and prey resources

引用

Avian Research 2020年第4期11卷 398-411页

作者： Andrea P.Goijman Michael J.Conroy Vanina D.Varni Jeffrey J.thompson María Elena Zaccagnini instituto de Recursos Biológicos CIRNInstituto Nacional de Tecnología Agropecuaria(CNIA-INTA)HurlinghamBuenos AiresArgentina D.B.Warnell School of Forestry and Natural Resources University of GeorgiaAthensGA 30602USA present address:Athens GAUSA present address:Laboratorio de Genómica Ecológica y Evolutiva IrapuatoGtoMéxico present address:Guyra Paraguay-CONACYT Av.Cnel.Carlos BóvedaParque Ecológico Capital-Viñas CuéAsunciónParaguay present address:instituto Saite AsunciónParaguay present address:the Ronin institute MontclairNJUSA present address:instituto Nacional de Tecnología Agropecuaria(INTA) CABAArgentina

Background:Reconciling agriculture and biodiversity conservation is a challenge given the growing demand for agricultural products.In recent decades,Argentina has witnessed agricultural expansion and intensification affecting biodiversity and associated ecosystem services.Within agroecosystems,the level of habitat quality is critical for birds,and may depend on vegetation structure,availability of invertebrate prey,and the use of pesticides.Although the relationship between vegetation structure and avian occurrence has been widely studied,to our knowledge,there are no studies that also incorporate prey availability throughout the cycle of soybean crops in Argentina.We estimated and predicted the effects of land cover and temporal variation on the occurrence of avian foraging guilds in Entre Ríos,Argentina,in order to guide management related to potential ecosystem services provided by birds.We also estimated temporal effects of vegetation structure and insecticides on the main arthropod orders consumed by birds to evaluate prey availability.Methods:We conducted bird and arthropod surveys for 2 years along transects located in 20 randomly selected soybean fields(N=60)and their adjacent borders(N=78)throughout the crop growing season,in four seasons.We estimated avian occupancy,accounting for imperfect detection,and arthropod counts fitting generalized linear mixed models.Results:the number of native trees in field borders positively influenced the occurrence of most bird species,mainly insectivores.Granivore foliage gleaners,also were positively affected by grass height.Salliers and aerial foragers were weakly affected by distance to forest and native trees.In general,the availability of invertebrates to birds was highest during the third season.Arthropod counts in borders were greater during the last three crop stages than during the pre-sowing period.Conclusions:We found that with 10 to 15 native tree species in borders,coupled with a complex vegetation structure with shrubs and grasses,we could conserve a wide

关键词： Agriculture Birds Ecosystem services Insecticide Insectivores Invertebrates Management Native trees Occurrence

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

A potato late blight resistance gene protects against multiple Phytophthora species by recognizing a broadly conserved RXLR-WY effector

引用

Molecular Plant 2022年第9期15卷 1457-1469页

作者： Xiao Lin Andrea Olave-Achury Robert Heal Marina Pais Kamil Witek Hee-Kyung Ahn He Zhao Shivani Bhanvadia Hari S.Karki Tianqiao Song Chih-hang Wu Hiroaki Adachi Sophien Kamoun Vivianne G.A.A.Vleeshouwers Jonathan D.G.Jones the Sainsbury Laboratory University of East AngliaNorwich Research ParkNR47UH NorwichUK Wageningen UR Plant Breeding Wageningen University and ResearchDroevendaalsesteeg 16708 PB WageningenThe Netherlands present address:institute of Plant Protection Jiangsu Academy of Agricultural SciencesNanjing 210014P.R.China present address:institute of Plant and Microbial Biology Academia SinicaTaipei 11529 Taiwan present address:Laboratory of Crop Evolution Graduate School of AgricultureKyoto UniversityMozumeMukoKyoto 617-0001Japan present address:Lipman Family Farms 21106 Six Ls Farm RdEsteroFloridaUnited States

Species of the genus Phytophthora,the plant killer,cause disease and reduce yields in many crop plants.Although many Resistance to Phytophthora infestans(Rpi)genes effective against potato late blight have been cloned,few have been cloned against other Phytophthora species.Most Rpi genes encode nucleotide-binding domain,leucine-rich repeat-containing(NLR)immune receptor proteins that recognize RXLR(Arg-X-Leu-Arg)effectors.However,whether NLR proteins can recognize RXLR effectors from multiple Phytophthora species has rarely been investigated.Here,we identified a new RXLR-WY effector AVRamr3 from P.infestans that is recognized by Rpi-amr3 from a wild Solanaceae species Solanum americanum.Rpi-amr3 associates with AVRamr3 in planta.AVRamr3 is broadly conserved in many different Phytophthora species,and the recognition of AVRamr3 homologs by Rpi-amr3 activates resistance against multiple Phytophthora pathogens,including the tobacco black shank disease and cacao black pod disease pathogens P.parasitica and P.palmivora.Rpi-amr3 is thus the first characterized resistance gene that acts against P.parasitica or P.palmivora.these findings suggest a novel path to redeploy known R genes against different important plant pathogens.

关键词： Rpi-amr3 AVRamr3 potato late blight Phytophthora disease RXLR-WY effector Solanum americanum

来源：

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Single photon emission and recombination dynamics in self-assembled GaN/AlN quantum dots

引用

Light(Science & Applications) 2022年第5期11卷 751-765页

作者： Johann Stachurski Sebastian Tamariz Gordon Callsen Raphaël Butté Nicolas Grandjean institute of Physics École Polytechnique Fédérale de LausanneEPFLCH-1015 LausanneSwitzerland present address:UniversitéCôte d’Azur CNRSCRHEAF-06560 ValbonneFrance present address:institut für Festkörperphysik Universität Bremen28359 BremenGermany

Ⅲ-nitride quantum dots(QDs)are a promising system actively studied for their ability to maintain single photon emission up to room temperature.Here,we report on the evolution of the emission properties of self-assembled GaN/AlN QDs for temperatures ranging from 5 to 300 K.We carefully track the photoluminescence of a single QD and measure an optimum single photon purity of g^((2))(0)=0.05±0.02 at 5 K and 0.17±0.08 at 300 K.We complement this study with temperature dependent time-resolved photoluminescence measurements(TRPL)performed on a QD ensemble to further investigate the exciton recombination dynamics of such polar zero-dimensional nanostructures.By comparing our results to past reports,we emphasize the complexity of recombination processes in this system.Instead of the more conventional mono-exponential decay typical of exciton recombination,TRPL transients display a bi-exponential feature with short-and long-lived components that persist in the low excitation regime.From the temperature insensitivity of the long-lived excitonic component,we first discard the interplay of dark-to-bright state refilling in the exciton recombination process.Besides,this temperature-invariance also highlights the absence of nonradiative exciton recombinations,a likely direct consequence of the strong carrier confinement observed in GaN/AlN QDs up to 300 K.Overall,our results support the viability of these dots as a potential single-photon source for quantum applications at room temperature.

关键词： temperature. process. quantum

来源：

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

NADPH oxidase family proteins:signaling dynamics to disease management

引用

Cellular & Molecular Immunology 2022年第6期19卷 660-686页

作者： Rizwana Begum Shilpa thota Abubakar Abdulkadir Gagandeep Kaur Prathyusha Bagam Sanjay Batra present address:Department of Environmental Medicine University of RochesterSchool of Medicine and DentistryRochesterNY14642USA Laboratory of Pulmonary Immunotoxicology Department of Environmental ToxicologySouthern University and A&M CollegeBaton RougeLA70813USA present address:Division of Systems Biology National Center for Toxicological ResearchJeffersonAR72079USA

Reactive oxygen species(ROS)are pervasive signaling molecules in biological systems.In humans,a lack of ROS causes chronic and extreme bacterial infections,while uncontrolled release of these factors causes pathologies due to excessive inflammation.Professional phagocytes such as neutrophils(PMNs),eosinophils,monocytes,and macrophages use superoxide-generating NADPH oxidase(NOX)as part of their arsenal of antimicrobial mechanisms to produce high levels of ROS.NOX is a multisubunit enzyme complex composed of five essential subunits,two of which are localized in the membrane,while three are localized in the cytosol.In resting phagocytes,the oxidase complex is unassembled and inactive;however,it becomes activated after cytosolic components translocate to the membrane and are assembled into a functional oxidase.the NOX isoforms play a variety of roles in cellular differentiation,development,proliferation,apoptosis,cytoskeletal control,migration,and contraction.Recent studies have identified NOX as a major contributor to disease pathologies,resulting in a shift in focus on inhibiting the formation of potentially harmful free radicals.therefore,a better understanding of the molecular mechanisms and the transduction pathways involved in NOX-mediated signaling is essential for the development of new therapeutic agents that minimize the hyperproduction of ROS.the current review provides a thorough overview of the various NOX enzymes and their roles in disease pathophysiology,highlights pharmacological strategies,and discusses the importance of computational modeling for future NOX-related studies.

关键词： NADPH oxidase Reactive oxygen species Inflammation Inhibitors In silico

来源：

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

the WAK-like protein RFO1 acts as a sensor of the pectin methylation status in Arabidopsis cell walls to modulate root growth and defense

引用

Molecular Plant 2023年第5期16卷 865-881页

作者： Apolonio I.Huerta Gloria Sancho-Andre´s Juan Carlos Montesinos Javier Silva-Navas Sole`ne Bassard Corinne Pau-Roblot Christopher Kesten Rudolf Schlechter Susanne Dora Temurkhan Ayupov Je´rome Pelloux^ Julia Santiago Clara Sa´nchez-Rodrı´guez Eth Zurich Institute of Molecular Plant Biology(D-BIOL)ZurichSwitzerland University of Lausanne Department of Plant Molecular BiologyLausanneSwitzerland UMRT INRAE 1158 BioEcoAgro–BIOPI Biologie des Plantes et Innovation Universite´de Picardie33 Rue St Leu80039 AmiensFrance present address:Lonza AG VispVisSwitzerland present address:institute of Microbiology Freie Universitat BerlinBerlinGermany present address:institute of Molecular and Clinical Ophthalmology-Basel BaselSwitzerland present address:Centro de Biotecnologı´a y Geno´mica de Plantas Universidad Polite´cnica de Madrid(UPM)–Instituto Nacional de Investigacio´n y Tecnologı´a Agraria y Alimentaria(INIA/CSIC)Campus de Montegancedo UPM28223 Pozuelo de Alarco´nSpain

Most organisms adjust their development according to the environmental conditions.For the majority,this implies the sensing of alterations to cell walls caused by different cues.Despite the relevance of this process,few molecular players involved in cell wall sensing are known and characterized.Here,we show that the wall-associated kinase-like protein RESISTANCE TO FUSARIUM OXYSPORUM 1(RFO1)is required for plant growth and early defense against Fusarium oxysporum and functions by sensing changes in the pectin methylation levels in the cell wall.the RFO1 dwell time at the plasma membrane is affected by the pectin methylation status at the cell wall,regulating MITOGEN-ACTIVATED PROTEIN KINASE and gene expression.We show that the extracellular domain of RFO1 binds de-methylated pectin in vitro,whose distribution in the cell wall is altered during F.oxysporum infection.Further analyses also indicate that RFO1 is required for the BR-dependent plant growth alteration in response to inhibition of pectin de-methyl-esterase activity at the cell wall.Collectively,our work demonstrates that RFO1 is a sensor of the pectin methylation status that plays a unique dual role in plant growth and defense against vascular pathogens.

关键词： alterations walls pectin

来源：

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

CD8+T cell metabolic flexibility elicited by CD28-ARS2 axisdriven alternative splicing of PKM supports antitumor immunity

引用

Cellular & Molecular Immunology 2024年第3期21卷 260-274页

作者： G.Aaron Holling Colin A.Chavel Anand P.Sharda Mackenzie M.Lieberman Caitlin M.James Shivana M.Lightman Jason H.Tong Guanxi Qiao Tiffany R.Emmons thejaswini Giridharan Shengqi Hou Andrew M.Intlekofer Richard M.Higashi Teresa W.M.Fan Andrew N.Lane Kevin H.Eng Brahm H.Segal Elizabeth A.Repasky Kelvin P.Lee Scott H.Olejniczak Department of Immunology Roswell Park Comprehensive Cancer CenterBuffaloNY 14263USA Department of Medicine Roswell Park Comprehensive Cancer CenterBuffaloNY 14263USA Human Oncology and Pathogenesis Program Memorial Sloan Kettering Cancer CenterNew YorkNY 10065USA Center for Environmental Systems Biochemistry Department of Toxicology and Cancer Biology and Markey Cancer CenterLexingtonKY 40536USA Department of Cancer Genetics and Genomics Roswell Park Comprehensive Cancer CenterBuffaloNY 14263USA present address:University of Colorado Boulder BoulderCO 80309USA present address:Dana Farber Cancer institute BostonMA 02215USA present address:Massachusetts institute of Technology BostonMA 02139USA present address:Melvin and Bren Simon Comprehensive Cancer Center Indiana University School of MedicineIndianapolisIN 46202USA

Metabolic flexibility has emerged as a critical determinant of CD8+T-cell antitumor activity,yet the mechanisms driving the metabolic flexibility of T cells have not been determined.In this study,we investigated the influence of the nuclear cap-binding complex(CBC)adaptor protein ARS2 on mature T cells.In doing so,we discovered a novel signaling axis that endows activated CD8+T cells with flexibility of glucose catabolism.ARS2 upregulation driven by CD28 signaling reinforced splicing factor recruitment to pre-mRNAs and affected approximately one-third of T-cell activation-induced alternative splicing events.Among these effects,the CD28-ARS2 axis suppressed the expression of the M1 isoform of pyruvate kinase in favor of PKM2,a key determinant of CD8+T-cell glucose utilization,interferon gamma production,and antitumor effector function.Importantly,PKM alternative splicing occurred independently of CD28-driven PI3K pathway activation,revealing a novel means by which costimulation reprograms glucose metabolism in CD8+T cells.

关键词： Immunometabolism mRNA splicing CD8 T cells ARS2 PKM2

来源：

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Impact of human sequences in variable domains of therapeutic antibodies on the location of CD4 T-cell epitopes

引用

Cellular & Molecular Immunology 2020年第6期17卷 656-658页

作者： Sylvain Meunier Moustafa Hamze Anette Karle Marie de Bourayne Abdelaziz Gdoura Sebastian Spindeldreher Bernard Maillère CEA-Saclay Institut Frederic JoliotSIMOPROUniversitéParis-Saclay91191 Gif sur YvetteFrance Novartis Pharma AG BaselSwitzerland present address:Integrated Biologix GmbH BaselSwitzerland

the clinical efficacy of therapeutic antibodies is recognized in many indications,explaining their rapid rise in the worldwide drug market.However,therapeutic antibodies can be immunogenic by inducing a specific immune response characterized by the production of anti-drug antibodies(ADAs).ADAs can potentially increase the clearance of therapeutic antibodies,decrease their therapeutic effects1 and induce hypersensitivity reactions.Because humans are thought to be tolerant to their own proteins,sequences of the therapeutic antibodies have been humanized or human antibodies have been directly generated by technologies using human sequences.However,human(ized)antibodies exhibit highly variable levels of immunogenicity,1,2 illustrating the poor understanding of the role of sequence humanization in mitigating the immunogenicity of therapeutic antibodies.Multiple lines of evidence highlight the role of CD4 T lymphocytes during the initiation of an ADA response,3 but few T-cell epitopes of marketed therapeutic antibodies have been described to date.

关键词： therapeutic antibodies clinical

来源：

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Sequence-Independent Identification of Active LTR Retrotransposons in Arabidopsis

引用

Molecular Plant 2018年第3期11卷 508-511页

作者： Jayne,Griffiths Marco,Catoni Mayumi,Iwasaki Jerzy,Paszkowski the Sainsbury Laboratory University of Cambridge Cambridge UK [∗]Corresponding author present address: University of Geneva Geneva Switzerland

Dear Editor,LTR retrotransposons （LTR-TEs） are mobile genetic elements that often comprise a large portion of the host genome and are particularly abundant in genomes of plants （Lisch, 2013）. they transpose through an RNA transcript that is reverse transcribed to an extrachromosomal DNA （ecDNA） of the original element that can insert at a new genomic location （Wicker et al., 2007）.

关键词： Arabidopsis LTR 鉴定人染色体 DNA RNA 元素植物

来源：

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

欢迎您,

建议与咨询留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

时间限定

文献类型

馆藏选择

核心期刊

语言

文献类型

帮助

文字说明：

检索规则说明：

检索范例：

分类表

所选分类

限定检索结果

文献类型

馆藏范围

日期分布

学科分类号

主题

机构

作者

语言

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

请选择保存的检索档案：

请选择收藏分类：

通借通还

欢迎您,

建议与咨询 留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

时间限定

文献类型

馆藏选择

核心期刊

语言

文献类型

帮助

文字说明：

检索规则说明：

检索范例：

分类表

所选分类

限定检索结果

文献类型

馆藏范围

日期分布

学科分类号

主题

机构

作者

语言

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

请选择保存的检索档案： 新增检索档案 确定 取消

请选择收藏分类： 新增自定义分类 确定 取消

通借通还

建议与咨询留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

请选择保存的检索档案：

请选择收藏分类：