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Quantifying source-sink relationships in leaf-color modified rice genotypes during grain filling

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Journal of Integrative Agriculture 2024年第9期23卷 2923-2940页

作者： Zhenxiang Zhou Paul Cstruik Junfei Gu Peter e.l.van der Putten Zhiqin Wang Jianchang Yang Xinyou Yin Centre for Crop systems Analysis Department of Plant SciencesWageningen University&ResearchWageningen 6700 AKThe Netherlands College of Agriculture Yangzhou UniversityYangzhou 225009China

leaf-color modification can affect canopy photosynthesis,with potential effects on rice yield and yield *** source-sink relationships through crop management is often used to improve crop *** study investigated whether and how modifying leaf color alters source-sink relationships and whether current crop cultivation practices remain applicable for leaf-color modified *** collected data of total biomass and nitrogen(N)accumulation in rice genotypes of four genetic backgrounds and their leaf-color modified variants(greener or yellower)were analyzed,using a recently established modelling method to quantify the source-sink(im)balance during grain *** all leaf-color variants,only one yellower-leaf variant showed a higher source capacity than its normal *** was associated with greater post-flowering N-uptake that prolonged the functional leaf-N duration,and this greater post-flowering N-uptake was possible because of reduced pre-flowering N-uptake.A density experiment showed that current management practices(insufficient planting density accompanied by abundant N application)are unsuitable for the yellower-leaf genotype,ultimately limiting its yield ***-color modification affects source-sink relationships by regulating the N trade-off between pre-and post-flowering uptake,as well as N translocation between source and sink *** best exploit leaf-color modification for improving crop productivity,adjustments of crop management practices are required.

关键词： source-sink relationship biomass nitrogen Oryza sativa leaf-color modification

Quality evaluation of Nothofagus pumilio seeds linked to forest management and climatic events

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ecological Processes 2024年第1期13卷 98-107页

作者： Julian Rodríguez-souilla Jimena e.Chaves María Vanessa lencinas Juan Manuel Cellini Fidel A.Roig Pablo l.Peri Guillermo Martinez Pastur laboratorio de Recursos Agroforestales Centro Austral de Investigaciones Científicas (CADIC) Consejo Nacional de Investigaciones Científicas y Técnicas(CONICET ) laboratorio de Investigaciones en Maderas (lIMAD) Universidad Nacional de la Plata (UNLP) Instituto Argentino de Nivología Glaciología y Ciencias Ambientales (IAN-IGLA) Consejo Nacional de Investigaciones Científicas y Técnicas (CONICET ) Instituto Nacional de Tecnología Agropecuaria (INTA) Universidad Nacional de la Patagonia Austral (UNPA) Consejo Nacional de Investigaciones Científicas y Técnicas (CONICET )

Background Forest ecosystems undergo significant transformations due to harvesting and climate fluctuations, emphasizing the critical role of seeding in natural regeneration and long-term structural preservation. Climate change further amplifies these dynamics, affecting phenology across species and regions. In Tierra del Fuego(Argentina), Nothofagus pumilio(lenga) forests represent the most important timber resource, and it is managed through different silvicultural strategies. This species demonstrates notable post-disturbance regeneration, yet seed fall exhibits signifi-cant variability, leading to variations in seed quality(e.g., viability). This study aims to assess fluctuations in N. pumilio seed quality, determine how it varies concerning forest management strategies, annual productivity, and the co-occurrence of climatic phenomena including el Ni?o-southern Oscillation(eNsO) and the southern Annular Mode(sAM).Results Viable seeds represented 18.4% of the total, notably higher in unharvested than in managed areas. Con-versely, empty seeds were more prevalent in harvested areas(> 75%). seed quality exhibited significant differences across silvicultural treatments, except for insect-predated seeds, which had similar proportions across all areas, though dispersed retention showed higher predation. When considering years with varying production levels, high-production years favoured full and viable seeds, particularly in unharvested forests and aggregated retention, while low-production years saw reduced viability across all treatments. Quadratic models revealed that viability increased with seed production, where unharvested forests achieved the highest values. Climate variability influenced seed proportions, where eNsO+/sAM+ promoting more full and viable seeds, while eNsO–/sAM+ favoured non-predated seeds, especially in unharvested *** seed quality varies among treatments and years with different levels of seeding. Variations in seed qual-ity, l

关键词： Forest management seeding Climate change extreme event Patagonia

structure and dielectric properties of (1-x)Na_(0.5)Bi_(0.5)TiO_(3-x)Na_(0.5)K_(0.5)NbO_(3)

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Journal of Advanced Dielectrics 2024年第1期14卷 82-88页

作者： e.V.Glazunova l.A.shilkina A.s.Chekhova A.V.Nazarenko I.A.Verbenko l.A.Reznichenko Research Institute of Physics Southern Federal University Rostov-on-Don344090Russia Faculty of Physics Southern Federal University Rostov-on-Don344090Russia southern scientific Center of the Russian Academy of sciences Rostov-on-Don 344006Russia

The solid solutions of the(1-x)Na_(0.5)Bi_(0.5)TiO_(3-x)Na_(0.5)K_(0.5)NbO_(3) system were produced by the conventional ceramic technology using mechanical activation of the synthesized *** was found that in the(1-x)Na_(0.5)Bi_(0.5)TiO_(3-x)Na_(0.5)K_(0.5)NbO_(3) system at room temperature,a number of morphotropic phase transitions occur:rhombohedral!cubic!tetragonal!monoclinic *** introduction of a small amount of Na_(0.5)K_(0.5)NbO_(3) leads to an increase in the temperature stability of the dielectric properties of ceramics.A change in the relaxor properties of the solid solutions of the(1-x)Na_(0.5)Bi_(0.5)TiO_(3-x)Na_(0.5)K_(0.5)NbO_(3) system was *** increase in energy density and energy efficiency was found at additive 10 mol.%of Na_(0.5)K_(0.5)NbO_(3).

关键词： Ceramics lead-free materials mechanical activation dielectric properties energy storage

Weight regain after intragastric balloon for pre-surgical weight loss

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World Journal of Gastrointestinal surgery 2024年第7期16卷 2040-2046页

作者： Danielle Abbitt Kevin Choy Alexandra Kovar Teresa s Jones Krzysztof J Wikiel edward l Jones Department of surgery University of ColoradoAuroraCO 80045United States Department of surgery Rocky Mountain Regional Veteran Affairs Medical CenterAuroraCO 80045United States

BACKGROUND Over one-third of Americans carry the diagnosis of obesity,many also with obesity-related *** can place patients at increased risk of operative and postoperative *** intragastric balloon has been shown to aid in minor weight loss,however its weight recidivism in patients requiring short interval weight loss has not been well *** To evaluate weight loss,ability to undergo successful elective surgery after intragastric balloon placement,and weight management after balloon *** This study is a retrospective review of patients in a single academic institution undergoing intragastric balloon placement from 2019-2023 to aid in weight loss prior to undergoing elective *** outcomes including weight loss,duration of balloon placement,successful elective surgery,weight regain postballoon and post-procedure complications were *** criteria included those with balloon in place at time of *** Thirty-three patients completed intragastric balloon therapy from 2019-2023 as a bridge to elective *** patients were required to participate in a 12-month weight management program to be eligible for balloon *** surgeries included incisional hernia repair,umbilical hernia repair,inguinal hernia repair,and knee and hip *** average age at placement was 53 years±11 years,majority(91%)were *** average duration of intragastric balloon therapy was 186 days±41 *** average weight loss was 14.0 kg±7.4 kg and with an average percent excess body weight loss of 30.0%(7.9%-73.6%).Over half of the patients(52.0%)achieved the goal of 30-50 lbs(14-22 kg)weight ***-one patients(64%)underwent their intended elective surgery,2 patients(6%)deferred surgery due to symptom relief with weight loss ***-one of the patients(64%)have documented weights in 3 months after balloon removal,in these patients the majority(76%)gained weight after balloon *** pat

关键词： Intragastric balloon Weight loss Obesity Bariatric Body mass index

electrobiocorrosion by microbes without outer-surface cytochromes

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mlife 2024年第1期3卷 110-118页

作者： Dawn e.Holmes Trevor l.Woodard Jessica A.smith Florin Musat Derek R.lovley Department of Microbiology University of Massachusetts AmherstAmherstMassachusettsUSA Department of Physical and Biological science Western New England UniversitySpringfieldMassachusettsUSA Department of Biomolecular sciences Central Connecticut State UniversityNew BritainConnecticutUSA Department of Biology Section for MicrobiologyAarhus UniversityAarhusDenmark Department of Molecular Biology and Biotechnology Facuity of Biology and GeologyBabes-Bolyai UniversityCluj-NapocaRomania

Anaerobic microbial corrosion of iron-containing metals causes extensive economic *** microbes are capable of direct metal-to-microbe electron transfer(electrobiocorrosion),but the prevalence of electrobiocorrosion among diverse methanogens and acetogens is poorly understood because of a lack of tools for their genetic *** studies have suggested that respiration with 316l stainless steel as the electron donor is indicative of electrobiocorrosion,because,unlike pure Fe^(0),316l stainless steel does not abiotically generate H_(2) as an intermediary electron ***,we report that all of the methanogens(Methanosarcina vacuolata,Methanothrix soehngenii,and Methanobacterium strain IM1)and acetogens(sporomusa ovata and Clostridium ljungdahli)evaluated respired with pure Fe^(0)as the electron donor,but only ***,***,and *** were capable of stainless steel *** electrobiocorrosive methanogens re-quired acetate as an additional energy source in order to produce methane from stainless *** of *** and *** demonstrated how acetogens can provide acetate to methanogens during *** only was Meth-anobacterium strain IM1 not capable of electrobiocorrosion,but it also did not accept electrons from Geobacter metal-lireducens,an effective electron-donating partner for direct interspecies electron transfer to all methanogens that can directly accept electrons from Fe^(0).The finding that ***,***,and *** are capable of electrobiocorrosion,despite a lack of the outer-surface c-type cytochromes previously found to be important in other electrobiocorrosive microbes,demonstrates that there are multiple microbial strategies for making electrical contact with Fe^(0).

关键词： acetogen corrosion Fe^(0) methanogen stainless steel

Impact of device resistances in the performance of graphene‑based terahertz photodetectors

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Frontiers of Optoelectronics 2024年第2期17卷 87-97页

作者： O.Castelló sofía M.lópez Baptista K.Watanabe T.Taniguchi e.Diez J.e.Velázquez-Pérez Y.M.Meziani J.M.Caridad J.A.Delgado-Notario Department of Applied Physics University of Salamanca37008 SalamancaSpain Unidad de excelencia en luz y Materia estructurada(lUMes) University of Salamanca37008 SalamancaSpain Research Center for electronic and Optical Materials National Institute for Materials Science1-1 NamikiTsukuba 305-0044Japan Research Center for Materials Nanoarchitectonics National Institute for Materials Science1-1 NamikiTsukuba 305-0044Japan Nanotechnology Group USAL-NanolabUniversity of Salamanca37008 SalamancaSpain

In recent years,graphene field-effect-transistors(GFeTs)have demonstrated an outstanding potential for terahertz(THz)photodetection due to their fast response and *** features are essential to enable emerging THz applications,including 6G wireless communications,quantum information,bioimaging and ***,the overall performance of these photodetectors may be utterly compromised by the impact of internal resistances presented in the device,so-called access or parasitic *** this work,we provide a detailed study of the influence of internal device resistances in the photoresponse of high-mobility dual-gate GFeT *** dual-gate architectures allow us to fine tune(decrease)the internal resistance of the device by an order of magnitude and consequently demonstrate an improved responsivity and noise-equivalent-power values of the photodetector,*** results can be well understood by a series resistance model,as shown by the excellent agreement found between the experimental data and theoretical *** findings are therefore relevant to understand and improve the overall performance of existing high-mobility graphene photodetectors.

关键词： Graphene THz Photodetector Field-effect transistor Plasmonic

Governance in the exploration of global and regional determinants of ICT development

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International Journal of Innovation studies 2024年第2期8卷 132-153页

作者： Charles s.saba simplice A.Asongu Nicholas Ngepah Yolande e.Ngoungou school of economics College of Business and EconomicsUniversity of JohannesburgJohannesburgSouth Africa Department of econornic&Data science New Uzbekistan University54 Mustaili AvenueTashkent100007Uzbekistan University of Yaounde 2 SoaCameroon

The present study assesses how governance affects information and communication technology(IcT)at the global level contingent on macroeconomic policy factors such as trade,foreign direct investment(FDI),manufacturing value added,and agricultural value *** study focuses on 183 countries from 2003 to 2021,and the empirical evidence is based on the generalized method of moments(GMM).The following main findings are *** the full sample,governance unconditionally promotes ICT development,while trade openness(industrial added value)moderates governance to promote(dampen)ICT *** sub-saharan Africa,only trade openness effectively moderates governance to induce an overall positive effect on ICT,while in the Middle east and North Africa(MeNA)region,all policy variables moderate governance for an overall positive incidence on ICT sector *** findings for the MeNA region are confirmed in the europe and Central Asia(eCA)region,with the exception of the moderating role of industrial added value,which engenders an overall negative *** the east and south Asia and the Pacific(esAP)countries,one overall positive incidence is apparent in the role of trade openness,while net negative effects are established from the moderating roles of industrial added value and agricultural added *** the American sub-sample,a positive(negative)net effect is apparent from the role of industrial added value(trade)in moderating the incidence of gover-nance on ICT sector ***,policy implications are discussed.

关键词： ICT Governance Trade FDI Industry Agriculture

Replica symmetry breaking in 1D Rayleigh scattering system:theory and validations

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light(science & Applications) 2024年第9期13卷 1757-1765页

作者： Yifei Qi longqun Ni Zhenyu Ye Jiaojiao Zhang Xingyu Bao Pan Wang Yunjiang Rao ernesto P.Raposo Anderson s.l.Gomes Zinan Wang Key lab of Optical Fiber sensing&Communications University of Electronic Science and Technology of China(UESTC)ChengduChina laboratório de Física Teórica e Computacional Departamento de FísicaUniversidade Federal de Pernambuco50670-901 RecifePernambucoBrazil Departamento de Física Universidade Federal de PernambucoRecifePernambucoBrazil

spin glass theory,as a paradigm for describing disordered magnetic systems,constitutes a prominent subject of study within statistical *** symmetry breaking(RsB),as one of the pivotal concepts for the understanding of spin glass theory,means that under identical conditions,disordered systems can yield distinct states with nontrivial *** fiber laser(RFl)based on Rayleigh scattering(Rs)is a complex disordered system,owing to the disorder and stochasticity of *** this work,for the first time,a precise theoretical model is elaborated for studying the photonic phase transition via the platform of Rs-based RFl,in which we clearly reveal that,apart from the pump power,the photon phase variation in RFl is also an analogy to the temperature term in spin-glass phase transition,leading to a novel insight into the intrinsic mechanisms of photonic phase *** addition,based on this model and real-time high-fidelity detection spectral evolution,we theoretically predict and experimentally observe the mode-asymmetric characteristics of photonic phase transition in Rs-based *** finding contributes to a deeper understanding of the photonic RsB regime and the dynamics of Rs-based RFl.

关键词： transition. symmetry breaking

Unmixing detrital zircon U-Pb ages reveals tectonic and climatic depositional influences on the Carboniferous Ansilta Formation,Calingasta-Uspallata Basin,Western Argentina

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Geoscience Frontiers 2024年第4期15卷 61-77页

作者： J.R.Malone J.e.Malone J.l.Isbell D.H.Malone J.P.Craddock K.N.Pauls Department of Geological sciences Jackson School of GeosciencesUniversity of Texas at AustinAustinTX 78712USA Iowa Geological survey University of IowaIowa CityIA 52240USA Department of Geosciences University of Wisconsin-MilwaukeeMilwaukeeWI 53211USA Department of Geography Geology and the EnvironmentIllinois State UniversityNormalIL 61790-4400USA

The late Paleozoic Ice Age(lPIA)was a principal control of sedimentation across Gondwana from the late Devonian through early *** assess the hypothesis that glacial to interglacial transitions in western Argentina were the primary control influencing sediment routing patterns among the various Carboniferous-Permian basins in western *** Carboniferous Ansilta Formation consists of glaciomarine,nearshore,and fluvial systems deposited during the lPIA along the eastern margin of the Calingasta-Uspallata Basin in *** lower,glacially influenced succession of the Ansilta Formation records at least five glacial advances;the upper succession of consists of progradational shallow marine,deltaic,and fluvial *** combine 1225 new U-Pb zircon ages from six samples of the Carboniferous Ansilta Formation in the Calingasta-Uspallata Basin with 5864 U-Pb ages from 147 pub-lished samples in the detrital Pymix forward mixture model to characterize provenance *** the glacially influenced lower Ansilta Formation,sediment was derived locally from the Protoprecordillera,which was a prominent highland with alpine glaciers flowing west and east into the Calingasta-Uspallata and Paganzo basins,***,there was little or no connection between these two basins during serpukhovian-Bashkirian *** fluvial/deltaic upper Ansilta had distal sediment sources in the sierras ***,our results support the collapse of the Protoprecordillera topographic barrier,enabling drainage patterns connecting the Paganzo and Calingasta-Uspallata basins by late Pennsylvanian-early Permian time.

关键词： late Paleozoic Ice Age Argentina Calingasta-Uspallata Basin Ansilta Formation Detrital zircon provenance