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Two adjacent NLR genes conferring quantitative resistance to clubroot disease in Arabidopsis are regulated by a stably inherited epiallelic variation

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Plant Communications 2024年第5期5卷 148-162页

作者： Antoine Gravot Benjamin Lie gard Leandro Quadrana Florian Veillet Yoann Aigu Tristan Bargain juliette Benejam Christine Lariagon jocelyne Lemoine Vincent Colot Maria j.Manzanares-Dauleux Melanie jubault IGEPP Institut Agro INRAEUniversitede Rennes35650 Le RheuFrance Institut de Biologie de l’Ecole Normale Superieure(IBENS) Ecole Normale SuperieureCentre National de la Recherche Scientifique(CNRS)Institut National de la Santeet de la Recherche Medicale(INSERM)75005 ParisFrance IGEPP INRAE Institut AgroUniversitede Rennes29260 PloudanielFrance Present address:Aix-Marseille University CEACNRSInstitute of Biosciences and BiotechnologiesBIAM Cadarache13108 Saint-Paul-lez-DuranceFrance.

Clubroot caused by the protist Plasmodiophora brassicae is a major disease affecting cultivated *** a combination of quantitative trait locus(QTL)fine mapping,CRISPR-Cas9 validation,and extensive analyses of DNA sequence and methylation patterns,we revealed that the two adjacent neigh-boring NLR(nucleotide-binding and leucine-rich repeat)genes AT5G47260 and AT5G47280 cooperate in controlling broad-spectrum quantitative partial resistance to the root pathogen *** in Arabidopsis and that they are epigenetically *** variation in DNA methylation is not associated with any nucleotide variation or any transposable element presence/absence variants and is stably ***-ations in DNA methylation at the Pb-At5.2 QTL are widespread across Arabidopsis accessions and corre-late negatively with variations in expression of the two *** study demonstrates that natural,stable,and transgenerationally inherited epigenetic variations can play an important role in shaping resistance to plant pathogens by modulating the expression of immune receptors.

关键词： methylation clubroot Plasmodiophora brassicae AT5G47260 AT5G47280 ADR1-L3 ddm1

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Effect of nanoparticles on the performance of magnetorheological fluid damper during hard turning process

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Friction 2015年第4期3卷 333-343页

作者： P.Sam paul j.Agnelo IASANTH X.Ajay VASANTH A.S.VARADARAjAN Department of Mechanical Engineering Karunya UniversityCoimbatore 641114Tamil NaduIndia Nehru College of Engineering and Research Centre ThrissurKerala 678506India

Magnetorheological(MR)fluid damper which allows the damping characteristics of the damper to be continuously controlled by varying the magnetic field is extensively used in metal cutting to suppress tool *** though magnetorhelogical fluids have been successful in reducing tool vibration,durability of magnetorhelogical fluids remains a major challenge in engineering *** effect on the performance of magnetorhelogical fluids over a prolonged period of time is a major *** this paper,an attempt was made to reduce temperature and to improve viscosity of magnetorhelogical fluids by infusing nanoparticles along with MR *** oxide and titanium oxide nanoparticles of 0.1%and 0.2%concentration by weight were considered and experimental tests were conducted to study the influence of nanoparticles on the performance of magnetorheological *** the experimental results it was observed that the presence of nanoparticles in MR fluid reduces temperature and increases the viscosity of MR fluid thereby increasing the cutting performance during turning of hardened AISI 4340 steel.

关键词： magnetorheological(MR)fluid nanoparticles tool vibration hard turning temperature viscosity

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Microbial starch-binding domains are superior to granule-bound starch synthase I for anchoring luciferase to potato starch granules

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Progress in Natural Science:Materials International 2006年第12期16卷 1295-1299页

作者： jean-paul VINCKEN Luc C.j.M. SUURS Richard G.F. VISSER Laboratory of Plant Breeding Department of Plant Sciences Wageningen University Wageningen The Netherlands

Microbial starch-binding domains (SBD) and granule-bound starch synthase I (GBSSI) are proteins which are accumulated in potato starch granules. The efficiency of SBD and GBSSI for targeting active luciferase reporter proteins to granules during starch biosynthesis was compared. GBSSI or SBD sequences were fused to the N- or C-terminus of the luciferase (LUC) gene, via an artificial Pro-Thr encoding linker sequence. The genes were introduced into an amylose-free (amf) potato mutant. It appeared that SBD was superior to GBSSI as a targeting sequence, mainly because the luciferase retained higher activity in the SBD-containing fusion proteins than in the GBSSI-containing ones.

关键词： luciferase GBSS I SBD amf potato.

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Temporal and spatial variations of carbon isotope signature reveal substantial contribution of bracts and internode assimilates to grain filling of japonica rice

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The Crop journal 2021年第2期9卷 271-281页

作者： Mengjiao jiang Hongfa Xu Nianfu Yang Ganghua Li Yanfeng Ding Matthew j.paul Zhenghui Liu College of Agriculture Nanjing Agricultural UniversityNanjing 210095JiangsuChina Collaborative Innovation Center for Modern Crop Production Nanjing Agricultural UniversityNanjing 210095JiangsuChina Plant Science Rothamsted ResearchHarpendenHertfordshire AL52JQUK

Carbon isotope composition(δ^(13)C)of a plant organ is an inherent signature reflecting its physiological property,and thus is used as an integrative index in crop *** is also a non-intrusive method for quantifying the relative contribution of different source organs to grain filling in *** the samples collected from two-year field and pot experiments with two nitrogen(N)fertilization treatments,we investigated the temporal and spatial variations of δ^(13)C in source organs of leaf,sheath,internode,and bracts,and in sink organ *** nature of δ^(13)C was uncovered,with an order of leaf(−27.84‰)

关键词： japonica rice Carbon isotope composition(δ^(13)C) Temporal and spatial variations Source and sink relation Grain yield formation

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Doubled Haploid Production Using an Improved Anther Culture Protocol for Sorghum[Sorghum bicolor(L.)Moench]

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Phyton-International journal of Experimental Botany 2021年第2期90卷 475-487页

作者： paul Chege Erzsébet Kiss Csaba Lantos Andrea Palágyi jános Pauk Cereal Research Non-profit Ltd. Alsókikötősor 9Szeged6726Hungary Doctoral School of Plant Science Szent István UniversityGödöllőH2103Hungary

Sorghum[Sorghum bicolor(L.)Moench]can benefit from accelerated breeding and release of improved varieties through doubled haploid *** technology has been used in speeding up the breeding of other major cereals such as wheat,maize and rice,for which generally widely applied optimised protocols exist.A reproducible protocol for the crop,that can overcome genotype dependency and other species-specific challenges such as phenolic exudation is however *** study aimed at sorghum doubled haploids production thereby contributing to the development of an improved *** the 28 hybrid genotypes,both F1 registered-and experimental hybrids involved,this study successfully produced haploids from five genotypes and subsequently,four confirmed doubled-haploid lines on W14mf medium or its modification with 1.0 gl^(-1)L-proline,1.0 gl^(-1)L-asparagine and 1.0 gl^(-1)KH_(2)PO_(4).Medium 190-2Cu was used for regeneration and rooting,which occurred successfully,if the calli were transferred on to it less than 7 days after induction,and temperature was maintained at 25°C under light *** dependency was not wholly overcome;however,sorghum’s high tillering ability and abiotic stress tolerance were observed to contribute to attainment of haploid *** diploids producing seeds at rates of upto 80.5%were obtained,therefore eliminating the need for colchicine duplication.

关键词： In vitro androgenesis doubled-haploid sorghum anther-culture breeding

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Cell-matrix reciprocity in 3D culture models with nonlinear elasticity

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Bioactive Materials 2022年第3期7卷 316-331页

作者： Kaizheng Liu Maury Wiendels Hongbo Yuan Changshun Ruan paul H.j.Kouwer Research Center for Human Tissue and Organs Degeneration Institute of Biomedicine and BiotechnologyShenzhen Institutes of Advanced TechnologyChinese Academy of SciencesShenzhen518055PR China Radboud University Institute for Molecules and MaterialsHeyendaalseweg 1356525 AJNijmegenthe Netherlands Institute of Biophysics Hebei University of TechnologyTianjin300401PR China Molecular Imaging and Photonics Chemistry DepartmentKU LeuvenCelestijnenlaan 200F3001HeverleeBelgium

Three-dimensional(3D)matrix models using hydrogels are powerful tools to understand and predict cell *** interactions between the cell and its matrix,however is highly complex:the matrix has a profound effect on basic cell functions but simultaneously,cells are able to actively manipulate the matrix ***(mechano)reciprocity between cells and the extracellular matrix(ECM)is central in regulating tissue functions and it is fundamentally important to broadly consider the biomechanical properties of the in vivo ECM when designing in vitro matrix *** manuscript discusses two commonly used biopolymer networks,*** and fibrin gels,and one synthetic polymer network,polyisocyanide gel(PIC),which all possess the characteristic nonlinear mechanics in the biological stress *** start from the structure of the materials,then address the uses,advantages,and limitations of each material,to provide a guideline for tissue engineers and biophysicists in utilizing current materials and also designing new materials for 3D cell culture purposes.

关键词： Artificial extracellular matrices Mechanical reciprocity Collagen Fibrin Polyisocyanides

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All Roads Lead to Susceptibility: The Many Modes of Action of Fungal and Oomycete Intracellular Effectors

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Plant Communications 2020年第4期1卷 1-12页

作者： Qin He Hazel McLellan Petra C.Boevink paul R.j.Birch Key Laboratory of Horticultural Plant Biology(HZAU) Ministry of EducationKey Laboratory of Potato Biology and Biotechnology(HZAU)Ministry of Agriculture and Rural AffairsHuazhong Agricultural UniversityWuhanHubei 430070China Division of Plant Sciences School of Life SciencesUniversity of Dundee(at JHI)InvergowrieDundee DD25DAUK Cell and Molecular Sciences James Hutton InstituteInvergowrieDundee DD25DAUK These authors contributed equally to this article.

The ability to secrete effector proteins that can enter plant cells and manipulate host processes is a key determinant of what makes a successful plant ***,we review intracellular effectors from filamentous(fungal and oomycete)phytopathogens and the host proteins and processes that are targeted to promote *** cover contrasting virulence strategies and effector modes of *** pathogen effectors alter the fates of host proteins that they target,changing their stability,their activity,their location,and the protein partners with which they *** effectors inhibit target activity,whereas others enhance or utilize it,and some target multiple host *** discuss the emerging topic of effectors that target negative regulators of immunity or other plant proteins with activities that support *** also highlight the commonly targeted host proteins that are manipulated by effectors from multiple pathogens,including those representing different kingdoms of life.

关键词： effectors fungi oomycete immunity defense susceptibility factor

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Ballistic impact response of flexible and rigid UHMWPE textile composites:Experiments and simulations

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Defence Technology（防务技术） 2023年第4期22卷 37-53页

作者： Hongxu Wang Dakshitha Weerasinghe paul j.Hazell Damith Mohotti Evgeny V.Morozov juan P.Escobedo-Diaz School of Engineering and Information Technology The University of New South WalesCanberraACT2600Australia

This study elaborates on the effects of matrix rigidity on the high-velocity impact behaviour of UHMWPE textile composites using experimental and numerical *** composite samples were manufactured of a plain-weave fabric(comprising Spectra?1000 fibres)and four different matrix ***-velocity impact tests were conducted by launching a spherical steel projectile to strike on the prepared samples via a gas *** experimental results showed that the textile composites gradually changed from a membrane stretching mode to a plate bending mode as the matrix rigidity and thickness *** composites deformed in the membrane stretching mode had higher impact resistance and energy absorption capacity,and it was found that the average energy absorption per ply was much higher in this mode,although the number of broken yarns was smaller in the perforated ***,the flexible matrix composites always had higher perforation resistance but larger deformation than the rigid matrix counterparts in the tested thickness and velocity range.A novel numerical modelling approach with enhanced computational efficiency was proposed to simulate textile composites in mesoscale *** simulation results revealed that stress and strain development in the more rigid matrix composite was localised in the vicinity of the impact location,leading to larger local deformation and inferior perforation resistance.

关键词： Impact behaviour Textile composite UHMWPE fibre Energy absorption Finite element analysis

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An algorithm for family screening for coeliac disease

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World journal of Gastroenterology 2006年第48期12卷 7805-7809页

作者： jocelyn S Fraser Alistair L King H julia Ellis Simon j Moodie Ingvar Bjarnason jill Swift paul j Ciclitira Division of Nutritional Sciences King's College London United Kingdom Division of Nutritional Sciences King’s College London United Kingdom

AIM: To assess the level of undiagnosed coeliac disease (CD) in relatives of patients affected by the condition. METHODS: We collected blood from 914 relatives of probands. We screened these individuals by ELISA for IgA and IgG tTG antibodies, confirming any positive IgA tTG results with an IgA EMA and looked for evidence of IgA deficiency in those who were IgG tTG positive alone, and performed IgG1 EMA in these individuals. We undertook HLA typing where positive screening was found, and this confirmed a strong prevalence of HLA- DQ2 in the coeliac population. Follow-up small intestinal biopsy was undertaken in cases with positive serological screening, wherever possible. RESULTS:Use of this serological screening algorithm revealed a prevalence of undiagnosed CD in 5%-6% of first degree relatives of probands. CONCLUSION:Our data suggests that first degree relatives of individuals with CD should be screened for this condition.

关键词： Coeliac disease Screening Endomysialantibody Familial study IgA deficiency Prevalence Tissue transglutaminase

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Feasibility study of phase-sensitive imaging based on multiple reference optical coherence tomography

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Chinese Optics Letters 2017年第9期15卷 25-30页

作者： Roshan Dsouza Hrebesh Subhash Kai Neuhaus paul M.McNamara josh Hogan Carol Wilson Martin j.Leahy Tissue Optics and Microcirculation Imaging Group School of PhysicsNational University of IrelandGalway H91 CF50Ireland Compact Imaging Ireland Ltd. Galway H91 CF50Ireland Colgate-Palmolive Global Technology Centre Piscataway NJ 08855USA Compact Imaging Inc.Mountain View 94043USA Royal College of Surgeons(RCSI) DublinIreland

Multiple reference optical coherence tomography（MR-OCT） is a recently developed, low-cost and compact time-domain OCT solution for primary care and consumer level applications. A combination of a voice coil actuator and a partial mirror（PM） extends the scan range for imaging depths of approximately 1 mm in biological samples. Our previous research on MR-OCT is based only on intensity information obtained from the depth-resolved interference signal. In this Letter, we extract the phase information from the MR-OCT signal and, hence, provide an additional contrast modality. The phase sensitivity of the system is measured to be approximately 0.2 and 1.5 rad for the first and twelfth orders of reflection when using a mirror as the *** Letter describes first results of phase-sensitive data measured on a phantom obtained with MR-OCT. Data from a chick embryo chorioallantoic membrane（CAM） is used to demonstrate the feasibility of MR-OCT for in vivo phase-sensitive imaging.

关键词： Feasibility study of phase-sensitive imaging based on multiple reference optical coherence tomography VCM Figure CAM

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