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Cellulose synthase ‘class specific regions’ are intrinsically disordered and functionally undifferentiated

Journal of Integrative Plant Biology 2018年第6期60卷 481-497页

作者： Tess R.Scavuzzo-Duggan arielle m.chaves Abhishek Singh Latsavongsakda Sethaphong Erin Slabaugh Yaroslava G.Yingling Candace H.Haigler Alison W.Roberts Department of Biological Sciences University of Rhode Island120 Flagg RoadKingstonRI 02881USA Department of materials Science and Engineering North Carolina State UniversityRaleighNC 27695USA Department of Crop and Soil Sciences and Department of Plant and microbial Biology North Carolina State UniversityRaleighNC 27695USA

Cellulose synthases （CESAs） are glycosyltransferases that catalyze formation of cellulose microfibrils in plant cell walls. Seed plant CESA isoforms cluster in six phylogenetic clades, whose non-interchangeable members play distinct roles within cellulose synthesis complexes （CSCs）. A ＇class specific region＇（CSR）, with higher sequence similarity within versus between functional CESA classes, has been suggested to contribute to specific activities or interactions of different isoforms. We investigated CESA isoform specificity in the moss, Physcomitrella patens （Hedw.） B. S. G. to gain evolutionary insights into CESA structure/function relationships. Like seed plants, P. patens has oligomeric rosette-type CSCs, but the PpCESAs diverged independently and form a separate CESA clade. We showed that P. patens has two functionally distinct CESAs classes, based on the ability to complement the gametophore-negative phenotype of a ppcesa5 knockout line. Thus, non-interchangeable CESA classes evolved separately in mosses and seed plants. However, testing of chimeric moss CESA genes for complementation demonstrated that functional classspecificity is not determined by the CSR. Sequence analysis and computational modeling showed that the CSR is intrinsically disordered and contains predicted molecular recognition features, consistent with a possible role in CESA oligomerization and explaining the evolution of class-specific sequences without selection for class-specific function.

关键词： Uwe Sonnewald Friedrich-Alexander University Germany

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Sensory Phenotypic and molecular Identification of Aromatic Rice Accessions Cultivated in Benin

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Advances in Bioscience and Biotechnology 2024年第3期15卷 195-206页

作者： Chimène Nadège mahoussi Nanoukon Koffi David montcho Hambada Deless Edmond Fulgence Thiémélé Bignon meyrix Pamela Franzel Loumedjinon Babatoundé Franel Carel Wenceslas Affolabi Amed Sèmèvo Havivi Kéllya Laurinzo Déguénon Grâce Finagnon Vitoekpon arielle Bankole Lambert Gustave Djedatin Laboratory of molecular Biology and Bioinformatics Applied to Genomics National School of Applied Biosciences and Bio-technologies National University of Science Technology Engineering and Mathematics Dassa-Zoumè Benin Laboratory of molecular Biology and Bioinformatics Applied to Genomics National School of Applied Biosciences and Biotechnologies National University of Science Technology Engineering and Mathematics Dassa-Zoumè Benin Laboratory of Plant Horticultural and Forestry Sciences National University of Agriculture Kétou Benin Genetics Teaching and Research Unit Department of Biochemistry-Genetics Peleforo GON COULIBALY University Korhogo C&#244te d’Ivoire

Rice is one of the most widely cultivated cereals in the world, and its aroma is increasingly in demand. With the advancement of research, a major rice flavor gene has been identified on rice chromosome 8. It encodes non-functional betaine aldehyde dehydrogenase leading to the accumulation of 2-acetyl-1-pyrroline which is the major olfactory compound that confers the fragrant character to rice. The aroma of rice is considered a special trait of enormous economic importance that determines the prime price in world trade. To satisfy the needs of the population and reduce rice imports into Benin, we conducted this study to identify aromatic rice accessions grown in Benin. Seventy-two rice accessions collected across Benin were PCR amplified with three SSR markers Rm 7049, Aro 7, and Rm 223, linked to the fgr (fragrance of rice) aroma gene. molecular analysis revealed that 12 of the 72 accessions, namely Bagou 19, Bagou 22, Tchaka 34, Foun 15, Tchaka 41, Nana 32, Kan 61, Kung 69, Kung 67, Bagou 20, Agbab 101 and Koum 55 possess the fgr gene and can be considered as aromatic rice accessions. A sensory phenotypic test using KOH was carried out on rice accessions carrying fgr gene. Of the twelve positives, only one had the smell of aromatic rice, like the Azucena control. These results show that Benin also has aromatic rice varieties that can be sold on national and international markets.

关键词： Aromatic Rice 2-Acetyl-1-Pyrroline SSR markers Benin

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Bioremediation Potential of the macroalga Ulva lactuca (Chlorophyta) for Ammonium Removal in Elastomer Industry Wastewater

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Advances in Bioscience and Biotechnology 2024年第6期15卷 325-343页

作者： Diego Lelis Alex Enrich-Prast Camille R. chaves Thuane mendes Anacleto Roberta R. C. Pereira Vinicius P. de Oliveira Programa de Ps-Graduao em Biotecnologia Vegetal e Bioprocessos Universidade Federal do Rio de Janeiro Rio de Janeiro Brazil Unidade multiusurio de Anlises Ambientais Universidade Federal do Rio de Janeiro Rio de Janeiro Brazil Institute of marine Science Federal University of So Paulo (IMar/UNIFESP) Santos Brazil Department of Thematic StudiesEnvironmental Change and Biogas Solutions Research Center (BSRC) Linkping University Linkping Sweden Department of marine Biology Institute of Biology Federal University of Rio de Janeiro Rio de Janeiro Brazil

During the production of nitrile rubber, significant amounts of nitrogen in the form of ammonium are generated in the wastewater. The discharge of this high-nitrogen wastewater can lead to serious environmental issues, including eutrophication, disruption of aquatic ecosystems, and groundwater contamination. To mitigate these impacts, this research explored the bioremediation capabilities of the macroalgae Ulva lactuca (Chlorophyta) for removing nitrogen from nitrile rubber production wastewater. The study employed single-phase and michaelis-menten decay models based on ammonium consumption, using various dilutions of wastewater to identify the optimal concentration for treatment. The physiological state of the macroalgae was monitored by measuring the photosynthetic capacity and specific growth rate during the experiments. In the presence of U. lactuca, ammonium concentrations decreased in all treatment groups, confirming that the ammonium kinetics conformed to both applied models. Our results show that U. lactuca effectively reduces ammonium concentrations, with an approximate removal rate of 0.020 µm·g−1·min−1 across different wastewater concentrations (70%, 80%, 90%, and 100%). Notably, the treatments with 70%, 80%, and 90% wastewater strength achieved about 67% reduction in ammonium, demonstrating the alga’s capacity to treat high-nitrogen wastewater. The photosynthetic performance of U. lactuca initially declined in control conditions but stabilized across all treatments, highlighting its adaptability. The kinetic analysis using the michaelis-menten model indicated a Vmax of 1342 μm·g−1·Dmh−1, suggesting a robust capacity for ammonium uptake when fully saturated. Our study underscores the potential of Ulva lactuca as a cost-effective and efficient agent for wastewater bioremediation, particularly in settings with high nitrogen loads.

关键词： Photosynthetic Quantum Yield One-Phase Decay model michaelis-menten model Nitrogen Physiological Parameters Elastomers

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Soil organic carbon stocks in native forest of Argentina:a useful surrogate for mitigation and conservation planning under climate variability

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Ecological Processes 2024年第1期13卷 3-24页

作者： Pablo L.Peri Juan Gaitán matías mastrangelo marcelo Nosetto Pablo E.Villagra Ezequiel Balducci martín Pinazo Roxana P.Eclesia Alejandra Von Wallis Sebastián Villarino Francisco Alaggia marina González Polo Silvina manrique Pablo A.meglioli Julián Rodríguez-Souilla martín mónaco Jimena E.chaves Ariel medina Ignacio Gasparri Eugenio Alvarez Arnesi maría Paula Barral Axel von müller Norberto m.Pahr Josefina Uribe Echevarria Pedro Fernández marina morsucci Dardo López Juan manuel Cellini Leandro Alvarez Ignacio Barberis Hernán Colomb Ludmila La manna Sebastián Barbaro Cecilia Blundo Ximena Sirimarco Laura Cavallero Gualberto Zalazar Guillermo martínez Pastur Instituto Nacional de Tecnología Agropecuaria (INTA) Universidad Nacional de la Patagonia Austral (UNPA) Consejo Nacional de Investigaciones Científicas y Técnicas (CONICET ) Universidad Nacional de Luján Consejo Nacional de Investigaciones Científicas y Técnicas (CONICET ) Grupo de Estudio de Agroecosistemas y Paisajes Rurales (GEAP) Universidad Nacional de Mar del Plata Consejo Nacional de Investigaciones Científicas y Técnicas(CONICET ) CCT San Luis Consejo Nacional de Investigaciones Científicas y Técnicas (CONICET ) Instituto Argentino de Nivología Glaciología y Ciencias Ambientales (IANIGLA) Consejo Nacional de Investigaciones Científicas y Técnicas (CONICET ) Universidad Nacional de Cuyo Instituto de Investigaciones en Biodiversidad y medioambiente (INIBIOmA) Consejo Nacional de Investigaciones Científicas y Técnicas (CONICET ) Instituto de Investigaciones en Energía No Convencional CCT Salta-JujuyConsejo Nacional de Investigaciones Científicas y Técnicas (CONICET ) Laboratorio de Recursos Agroforestales Centro Austral de Investigaciones Científicas (CADIC) Consejo Nacional de Investigaciones Científicas y Técnicas (CONICET ) Dirección Nacional de Bosques Ministerio de Ambiente y Desarrollo Sostenible de la Nación Instituto de Ecología Regional Consejo Nacional de Investigaciones Científicas y Técnicas (CONICET )Universidad Nacional de Tucumán Universidad Nacional de Rosario Instituto de Investigaciones en Ciencias Agrarias de Rosario Centro Científico Tecnológico CONICET Grupo de Estudio de Agroecosistemas y Paisajes Rurales (GEAP) Universidad Nacional de Mar del Plata Consejo Nacional de Investigaciones Científicas y Técnicas (CONICET ) Laboratorio de Investigaciones en maderas (LImAD) Universidad Nacional de La Plata (UNLP) Administración de Parques Nacionales (APN) Parque Nacional Los Alerces Centro de Estudios Ambientales Integrados (CEAI) Universidad Nacional de la Patagonia San Juan Bosco (UNPASJB) Consejo Nacional de Investigaciones Científicas y Técnicas (CONICET )

Background The nationally determined contribution（NDC） presented by Argentina within the framework of the Paris Agreement is aligned with the decisions made in the context of the United Nations Framework Conven-tion on Climate Change（UNFCCC） on the reduction of emissions derived from deforestation and forest degradation, as well as forest carbon conservation（REDD+）. In addition, climate change constitutes one of the greatest threats to forest biodiversity and ecosystem services. However, the soil organic carbon（SOC） stocks of native forests have not been incorporated into the Forest Reference Emission Levels calculations and for conservation planning under cli-mate variability due to a lack of information. The objectives of this study were:（i） to model SOC stocks to 30 cm of native forests at a national scale using climatic, topographic and vegetation as predictor variables, and（ii） to relate SOC stocks with spatial–temporal remotely sensed indices to determine biodiversity conservation concerns due to threats from high inter-annual climate *** We used 1040 forest soil samples（0–30 cm） to generate spatially explicit estimates of SOC native forests in Argentina at a spatial resolution of approximately 200 m. We selected 52 potential predictive environmental covari-ates, which represent key factors for the spatial distribution of SOC. All covariate maps were uploaded to the Google Earth Engine cloud-based computing platform for subsequent modelling. To determine the biodiversity threats from high inter-annual climate variability, we employed the spatial–temporal satellite-derived indices based on Enhanced Vegetation Index（EVI） and land surface temperature（LST） images from Landsat *** SOC model（0–30 cm depth） prediction accounted for 69% of the variation of this soil property across the whole native forest coverage in Argentina. Total mean SOC stock reached 2.81 Pg C（2.71–2.84 Pg C with a probability of 90%） for a total area of 460,790 km2,

关键词： Soil organic carbon Biodiversity Native forest Climate change mitigation modelling Resilience

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Deficit Irrigation as a Strategy to Save Water:Physiology and Potential Application to Horticulture

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Journal of Integrative Plant Biology 2007年第10期49卷 1421-1434页

作者： J.miguel Costa maria F.Ortuo m.manuela chaves InstitutoSuperior de Agronomia Universidade Técnica de LisboaTapada da Ajuda1349-017 LisboaPortugal Laboratório de Ecofisiologia MolecularInstituto de Tecnologia Química e BiológicaApartado 1272780-901 OeirasPortugal Instituto

Water is an increasingly scarce resource worldwide and irrigated agriculture remains one of the largest and most inefficient users of this resource. Low water use efficiency （WUE） together with an increased competition for water resources with other sectors （e.g. tourism or industry） are forcing growers to adopt new irrigation and cultivation practices that use water more judiciously. In areas with dry and hot climates, drip irrigation and protected cultivation have improved WUE mainly by reducing runoff and evapotranspiration losses. However, complementary approaches are still needed to increase WUE in irrigated agriculture. Deficit irrigation strategies like regulated deficit irrigation or partial root drying have emerged as potential ways to increase water savings in agriculture by allowing crops to withstand mild water stress with no or only marginal decreases of yield and quality. Grapevine and several fruit tree crops seem to be well adapted to deficit irrigation, but other crops like vegetables tend not to cope so well due to losses in yield and quality. This paper aims at providing an overview of the physiological basis of deficit irrigation strategies and their potential for horticulture by describing the major consequences of their use to vegetative growth, yield and quality of different crops （fruits, vegetables and ornamentals）.

关键词： deficit irrigation horticulture partial rootzone drying regulated deficit irrigation water saving.

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Spatial cluster mapping and environmental modeling in pediatric inflammatory bowel disease

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World Journal of Gastroenterology 2023年第23期29卷 3688-3702页

作者： mielle michaux Justin m Chan Luke Bergmann Luis F chaves Brian Klinkenberg Kevan Jacobson Department of Pediatrics Division of GastroenterologyHepatology and NutritionFaculty of MedicineBritish Columbia Children’s HospitalUniversity of British ColumbiaVancouver V6H 3V4British ColumbiaCanada British Columbia Children’s Hospital Research Institute British Columbia Children’s HospitalVancouver V5Z 4H4British ColumbiaCanada Department of Geography University of British ColumbiaVancouver V6T 1Z2British ColumbiaCanada Department of Environmental and Occupational Health School of Public HealthIndiana UniversityBloomingtonIN 47405United States Department of Cellular and Physiological Sciences University of British ColumbiaVancouver V6T 1Z3British ColumbiaCanada

BACKGROUND Geographical(geospatial)clusters have been observed in inflammatory bowel disease(IBD)incidence and linked to environmental determinants of disease,but pediatric spatial patterns in North America are *** hypothesized that we would identify geospatial clusters in the pediatric IBD(PIBD)population of British Columbia(BC),Canada and associate incidence with ethnicity and environmental *** To identify PIBD clusters and model how spatial patterns are associated with population ethnicity and environmental *** One thousand one hundred eighty-three patients were included from a BC Children’s Hospital clinical registry who met the criteria of diagnosis with IBD≤age 16.9 from 2001–2016 with a valid postal code on file.A spatial cluster detection routine was used to identify areas with similar *** ecological analysis employed Poisson rate models of IBD,Crohn’s disease(CD),and ulcerative colitis(UC)cases as functions of areal population ethnicity,rurality,average family size and income,average population exposure to green space,air pollution,and vitamin-D weighted ultraviolet light from the Canadian Environmental Health Research Consortium,and pesticide *** Hot spots(high incidence)were identified in metro Vancouver(IBD,CD,UC),southern Okanagan regions(IBD,CD),and Vancouver Island(CD).Cold spots(low incidence)were identified in Southeastern BC(IBD,CD,UC),Northern BC(IBD,CD),and on BC’s coast(UC).No high incidence hot spots were detected in the densest urban *** results were represented as incidence rate ratios(IRR)with 95%*** risk factors for PIBD included fine particulate matter(Pm2.5)pollution(IRR=1.294,CI=1.113-1.507,Pm oil to orchards and grapes(IRR=1.135,CI=1.007-1.270,P=0.033).South Asian population(IRR=1.020,CI=1.011-1.028,Pmily size(IRR=0.467,CI=0.268-0.81

关键词： Inflammatory bowel diseases Crohn disease Ulcerative colitis Pesticides Air pollution South Asian people

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A Long-Range Generalized Predictive Control Algorithm for a DFIG Based Wind Energy System

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IEEE/CAA Journal of Automatica Sinica 2019年第5期6卷 1209-1219页

作者： J.S.Solis-chaves Lucas L.Rodrigues C.m.Rocha-Osorio Alfeu J.Sguarezi Filho the Department of Energy Engineering at the Federal University of ABC-UFABC Santo AndreSPBrazil

This paper presents a new Long-range generalized predictive controller in the synchronous reference frame for a wind energy system doubly-fed induction generator based. This controller uses the state space equations that consider the rotor current and voltage as state and control variables, to execute the predictive control action. Therefore, the model of the plant must be transformed into two discrete transference functions, by means of an auto-regressive moving average model, in order to attain a discrete and decoupled controller, which makes it possible to treat it as two independent single-input single-output systems instead of a magnetic coupled multiple-input multiple-output system. For achieving that, a direct power control strategy is used, based on the past and future rotor currents and voltages estimation. The algorithm evaluates the rotor current predictors for a defined prediction horizon and computes the new rotor voltages that must be injected to controlling the stator active and reactive powers. To evaluate the controller performance, some simulations were made using matlab/Simulink. Experimental tests were carried out with a small-scale prototype assuming normal operating conditions with constant and variable wind speed profiles. Finally, some conclusions respect to the dynamic performance of this new controller are summarized.

关键词： Direct power control doubly-fed induction generator flux oriented control generalized predictive control long-range predictive control wind energy systems

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Strain and Temperature Characterization of LPGs Written by CO2 Laser in Pure Silica LmA Photonic Crystal Fibers

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Photonic Sensors 2015年第3期5卷 241-250页

作者： Roberta Cardoso chaves Alexandre de Almeida Prado POHL Ilda ABE Renan SEBEm Aleksander PATERNO Laboratorio Avangado de Telecomunicacoes Federal University of Technology Parancl Brazil Laboratorio de Fot6nica Federal University of Technology Parana Brazil Laboratory of Optoeleetronic Systems Santa Catarina State University Santa Catarina Brazil

This paper reports on the writing of long period gratings （LPGs） in a six-ring pure silica solid core, and large mode area photonic crystal fiber （fiber core diameter p = 10.1 μm） using a CO2 laser system, and the characterization of their strain and temperature sensitivities. Temperature and strain sensitivities in the order of-19.6pm/℃ and -88 pm/με, respectively, were obtained, which were comparable or surpassed values of the similar photonic crystal fiber （PCF）-based LPG or sensor configurations found in the literature.

关键词： Long period grating photonic crystal fiber CO2 laser

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Adenoma incidence decreases u nder the efect of polypectomy

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World Journal of Gastroenterology 2012年第11期18卷 1243-1248页

作者： Isadora Rosa Paulo Fidalgo Jose Soares Susana Vinga Carla Oliveira Joao P Silva Susana m Ferro Paula chaves Antonio G Oliveira Carlos N Leitao Gastroenterology Department Instituto Portu-gues de Oncologia de Lisboa Francisco Gentil EPE 1099-023Lisboa Portugal Faculdade de Ciencias da Safldeda Universidade da Beira Interior 6200-506 Covilha Portugal Jose Soares Gastroenterology Department Hospital de SantoAntonio EPE 4099-001 Porto Portugal Instituto de Engenharia de Sistemas e Com-putadores: Investigacao e Desenvolvimento 1000-029 LisboaPortugal Hospital de Santo Antonio EPE 4099-001Porto Portugal Pathology Department Instituto Portugues deOncologia de Lisboa Francisco Gentil EPE 1099-023 LisboaPortugal Biostatistics Department Faculdade deCiencias M6dicas 1169-056 Lisboa Portugal

mm： To investigate whether, under the influence of pol ypectomy, the incidence of adenoma decreases with age.mETHODS： Consecutive patients with colonic adenomas identified at index colonoscopy were retrospectively selected if they had undergone three or more complete colonoscopies, at least 24 mo apart. Patients who had any first-degree relative with colorectal cancer were excluded. Data regarding number of adenomas at each colonoscopy, their location, size and histological classification were recorded. The monthly incidence density of adenomas after the index examination was estimated for the study population, by using the person-years method. Baseline adenomas were excluded from incidence calculations but their characteristics were correlated with recurrence at follow-up, using the X^42 test.RESULTS： One hundred and fifty-six patients were included （109 male, mean age at index colonoscopy 56.8 ± 10.3 years）, with follow-up that ranged from 48 to 232 mo. No significant correlations were observed between the number, the presence of villous component, or the size of adenomas at index colonoscopy and the presence of adenomas at subsequent colonoscopies （P = 0.49, 0.12 and 0.78, respectively）. The incidence of colonic adenomas was observed to decay from 1.4% person-months at the beginning of the study to values close to 0%, at 12 years after index colonoscopy.CONCLUSION： Our results suggest the sporadic formation of adenomas occurs within a discrete period and that, when these adenomas are removed, all neoplasia-prone clones may be extinguished.

关键词： Colorectal cancer Colorectal adenoma In-cidence Age Polypectomy

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modeling unmanned aerial vehicle system for identifying foci of arboviral disease with monitoring system

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International Journal of modeling, Simulation, and Scientific Computing 2022年第3期13卷 98-120页

作者： John David S.Belem Hidalyn Theodory C.m.Souza Alvaro Sobrinho Lenardo chaves E.Silva Helder Fernando De Araujo Oliveira Federal Rural University of the Semiarid BR-233s/n Cara´ubasRio Grande do Norte 59780-000Brazil Federal Rural University of the Semiarid BR-226s/n Pau dos FerrosRio Grande do Norte 59900-000Brazil Federal University of the Agreste of Pernambuco Avenida Bom Pastor s/nGaranhuns Pernambuco 55292-270Brazil

People who live in low-income and hard-to-reach regions are usually the most affected ones by high incidences of arboviral diseases,increasing morbidity and mortality rates,and public health *** present the modeling of hardware and software components of an unmanned aerial vehicle(UAV)system by mathematical tools,focusing on monitoring foci of arboviral diseases transmitted by Aedes aegypti mosquito,e.g.,Zika,Chikungunya,and *** used restriction equations and the colored Petri nets formal modeling language to represent the flight dynamics and the software components of the system,*** evaluated the specification of desired behaviors of the monitoring system using simulations and the model checking *** results showed the completeness and correctness of the *** design of such a system is challenging due to the potential risks to people and the ***,this study provides insights into the development of an UAV system for such an application *** monitoring system has the potential of improving the efficiency in identifying foci of arboviral diseases.

关键词： System modeling unmanned aerial vehicle colored Petri nets flight dynamics arboviral diseases

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