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High aluminum concentration and initial establishment of Handroanthus impetiginosus : clues about an Al non-resistant species in Brazilian Cerrado

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Journal of Forestry Research 2020年第6期31卷 2075-2082页

作者： Ane Marcela das Chagas Mendon ca Jean Marcel sousa Lira Ana Luiza de Oliveira Vilela Daniel Amorim Vieira Nayara Cristina de Melo Joao paulo Rodrigues Alves Delfi no Barbosa programa de pós-graduacao em Fisiologia vegetal Departamento de BiologiaUniversidade Federal de LavrasLavrasMG 37200-000Brazil programa de pós-graduacao em Ciências Ambientais Instituto de Ciências ExatasUniversidade Federal de AlfenasAlfenasMG 37130-001Brazil programa de pós-graduacao em Fitotecnia Departamento de AgriculturaUniversidade Federal de LavrasLavrasMG 37200-000Brazil Instituto Federal de Educacao Ciência e Tecnologia do pará BelémPA 66093-020Brazil

Cerrado soils are acidic and nutrient-poor,with high content of solubilized Al 3+.plants growing in these conditions may display adaptations to cope with high aluminum concentrations especially during early developmental stages.We investigated leaf nutritional status,and photosynthetic and growth characteristics during the initial establishment of Handroanthus impetiginosus(Mart.Ex Dc.)Mattos,a secondary tree species distributed in the Brazilian Cerrado.Our goal was to understand leaf-level traits related to diff erent aluminum concentrations.H.impetiginosus plants were cultivated in four diff erent aluminum sulfate concentrations:0,1,2,and 4 mM Al,for 40 days.We performed analyses of growth,leaf gas exchange,chloroplast pigment content,and leaf mineral nutrients.We observed a linear increase of Al leaf content as a function of Al concentration in the nutrient solution.plants grown in 1 mM Al showed a remarkable increase of K leaf content,net photosynthesis,stomatal conductance,and transpiration,while in 4 mM Al there were reductions of N,p,and K contents,gas exchange characteristics,and height.H.impetiginosus did not have mechanisms of avoidance,compartmentalization,or resistance to high Al concentrations.Indeed,this species showed a hormetic response,with low Al concentrations stimulating and high Al concentrations inhibiting plant responses.

关键词： Hormesis Low Al concentration Al toxicity Cerrado species Carbon assimilation

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Effect of dietary supplementation with olive and sunflower oils on lipid profile and liver histology in rats fed high cholesterol diet

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Asian pacific Journal of Tropical Medicine 2017年第6期10卷 609-613页

作者： sandra Mara pimentel Duavy Gerson Javier Torres salazar Gerlania de Oliveira Leite Assis Ecker Nilda Vargas Barbosa Departamento de Química Universidade Regional do Cariri(URCA)Campus Pimenta Departamento de Bioquímica e biologia Molecular Programa de Pós-Graduacao em Ciências Biológicas:Bioquímica ToxicológicaUniversidade Federal de Santa Maria(UFSM)Campus Universitário-Camobi Departamento de Farmacologia Programa de Pós-Graduacao em FarmacologiaUniversidade Federal de Santa Maria(UFSM)Campus Universitário-Camobi

Objective: To compare the effects of high-monounsaturated(MUFA) and polyunsaturated fatty acids(pUFA) against the metabolic disorders elicited by a high-cholesterol diet(HC) in rats. Methods: Using in vivo dietary manipulation, rats were fed with different diets containing 4% soybean oil(cholesterol free diet) and 1% HC containing 12% olive oil(HC+OO) enriched with MUFA and 12% sunflower oil(HC+sO) enriched with pUFA for 60 d. serum lipid levels and hepatic steatosis were evaluated after the treatment period. Results: Comparatively, rats treated with HC+OO diet experienced a decrease in the serum LDL-C, VLDL-C and CT levels compared to those fed with HC+sO diet(pse, HC+OO provoked significant microvesicular steatosis situated in the hepatic acinar zone 1. Conclusions: HC+OO diet has high absorption velocity in the acinar zone 1 of liver compared to the HC+sO diet. Based on this, the reduction of the LDL-C, VLDL-C and CT serum levels in the animals treated with HC+OO diet can be caused by the delay in the FA release to the blood.

关键词： Cholesterol diets Olive oil sunflower oil serum lipids Liver steatosis

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种子库和植被物种之间的差异有助于保持新热带稀树草原的功能多样性

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Journal of plant Ecology 2021年第4期14卷 605-615页

作者： Evaldo Bde souza Francielli Bao Geraldo A.Damasceno Junior Arnildo pott programa de pos-graduacao em Ecologia e Conservacao Instituto de BiocienciasUniversidade Federal de Mato Grosso do SulCampo GrandeBrazil programa de pos-graduacao em biologia vegetal Instituto de BiocienciasUniversidade Estadual PaulistaRio ClaroSPBrazil programa de pos-graduacao em biologia vegetal Instituto de BiociênciasUniversidade Federal de Mato Grosso do SulCampo GrandeBrazil

本研究的目的是量化种子库和建立的植被对物种组成、功能组成和多样性的贡献,并讨论这些差异对冲积平原植物群落更新和稳定性的影响。我们在巴西潘塔纳尔湿地的一个周期性洪水泛滥的稀树大草原上,在旱季和雨季对分布在5个地点的25个地块... 详细信息

本研究的目的是量化种子库和建立的植被对物种组成、功能组成和多样性的贡献,并讨论这些差异对冲积平原植物群落更新和稳定性的影响。我们在巴西潘塔纳尔湿地的一个周期性洪水泛滥的稀树大草原上,在旱季和雨季对分布在5个地点的25个地块(10 m×1 m)的1.5 m高度的地面覆盖植被和种子库进行了采样。采用出苗法对土壤种子库进行了评价。研究结果表明,种子库物种具有赋予群落更新的特征,而植被则具有稳定性特征。种子库的功能丰富度高于植被,而功能均匀度则低于植被。由于种子库和植被的植物特征不同,使得具有不同功能稳定性和更新特性的物种得以共存,这将有助于维持植物的功能多样性。这可能会让植物种群在应对干旱、火灾和洪水等不同的环境选择时更具有弹性。

关键词：环境选择功能多样性水溶扩散潘塔纳尔湿地稳定性更新

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Abiotic drivers shape seed inputs and outputs in a tropical wetland on Croton trinitatis population

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Ecological processes 2022年第1期11卷 65-77页

作者： Francielli Bao Arnildo pott pedro Manuel Villa Centro de Avaliação da Biodiversidade Pesquisa e Conservação do Cerrado(CBC)Instituto Chico Mendes de Conservação da Biodiversidade(ICMBio)BrasíliaDF 70670-350Brazil programa de pós-Graduação em biologia vegetal Instituto de BiociênciasUniversidade Federal de Mato Grosso do SulCampo GrandeMS 79070-900Brazil programa de pós-Graduacão em Botânica Departamento de Biologia VegetalUniversidade Federal de ViçosaViçosaMG 36570-900Brazil Fundación para la Conservación de la Biodiversidad Mérida 7101Venezuela

Background:predicting how natural and anthropogenic drivers shape different ecological indicators,such as plant populations along environmental gradients,can be a relevant tool for establishing management and conservation criteria of tropical wetlands.We aimed to assess the effects of seasonal flood disturbance,type of grasslands and topographical conditions on Croton trinitatis population distribution in a tropical wetland.Methods:The study was carried out in a seasonally flooded grassland(Central-West Brazil).We conducted samplings of soil on the dry and flood hydrophases of the pantanal.We took the samples in eight seasonal ponds,with 1 km interval between them.Transects were marked during the flood period,observing the water level,one in the lowest zone,in the middle of the pond=low(ca.60 cm deep),one at the pond edge=mid(ca.30 cm deep)and one in the higher zone,on the external part=high(ca.1 cm deep).Results:The results showed that the topography,seasonality,and types of grassland determine differences in the abundance patterns of adult plants and seedlings,and seed bank and seed predation.The abiotic factors can shape plant population-related ecological processes and patterns,with outputs(germination and predation)and inputs(local dispersion and from neighbouring areas)of proportional seeds for the population maintenance in this environment.Conclusion:We emphasize the importance of these findings,to show that abiotic factors are not the only ones to be considered in ecological studies of distribution and structuring of populations in habitats with extreme seasonal events.

关键词： Environmental filter Flood disturbance pantanal population ecology seasonal change seed predation seedling soil seed bank

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soil attributes structure plant assemblages across an Atlantic forest mosaic

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Journal of plant Ecology 2018年第4期11卷 613-622页

作者： Maria Fabíola Barros Bruno X.pinho Tarciso Leão Marcelo Tabarelli programa de pós-Graduação em biologia vegetal Departamento de BotânicaUniversidade Federal de PernambucoPE 50670-901Brazil Department of Forest Resources University of MinnesotaSt.PaulMN 55108USA

Aims Community assembly persists as a key topic in ecology due to the complex variation in the relative importance of assembly forces and mechanisms across spatio-temporal scales and eco-systems.Here we address a forest-savanna vegetation mosaic in the Brazilian Atlantic forest to examine the role played by soil attributes as determinants of community assembly and organiza-tion at a landscape spatial scale.Methods We examined soil and plant assemblage attributes across 23 plots of forest and savanna in a 1600 km2 landscape exposed to the same climatic conditions in the Atlantic forest region of northeast Brazil.Assemblage attributes included species richness,taxonomic and functional composition(community weighted mean,CWM)and functional diversity(quadratic diversity;Rao’s quadratic entropy index)relative to plant leaf area,specific leaf area,leaf dry matter content,thickness and succulence.Important Findings Our results suggest that forest and savanna patches exposed to the same climatic conditions clearly differ in terms of soil attributes,plant assemblage structure,taxonomic and functional composition.By selecting particular plant strategies relative to resource economy,soil potentially affects community structure,with forest assemblages bear-ing more acquisitive resource-use strategies,while conservative plant strategies are more frequent in savannas.Accordingly,savanna-forest mosaics in the Atlantic forest region represent spatially organized plant assemblages in terms of taxonomic and functional features,with a sig-nal of trait convergence in both vegetation types.soil-mediated filter-ing thus emerges as a potential deterministic assembly force affecting the spatial organization of savanna-forest boundaries and mosaics.

关键词： community assembly habitat filtering plant functional traits savanna vegetation tropical forest

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Chronic exposure to ethanol causes steatosis and inflammation in zebrafish liver

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World Journal of Hepatology 2017年第8期9卷 418-426页

作者： Ana Claudia Reis schneider Cleandra Gregório Carolina Uribe-Cruz Ranieli Guizzo Tais Malysz Maria Cristina Faccioni-Heuser Larisse Longo Themis Reverbel da silveira La-boratório Experimental de Hepatologia e Gastroenterologia Hospital de Clínicas de Porto Alegre programa de pós- graduacao em Ciências Médicas Gastroenterologia e HepatologiaUniversidade Federal do Rio Grande do Sul programa de pós-graduacao em Genética e biologia Molecular(UFRGs) Instituto de Ciências Básicas da saúde(UFRGs) Departamento de Ciências Morfológicas(UFRGs) Centro de Microscopia Eletronica(UFRGs)

AIM To evaluate the effects of chronic exposure to ethanol in the liver and the expression of inflammatory genesin zebrafish.METHODs Zebrafish(n = 104),wild type,adult,male and female,were divided into two groups:Control and ethanol(0.05 v/v).The ethanol was directly added into water;tanks water were changed every two days and the ethanol replaced.The animals were fed twice a day with fish food until satiety.After two and four weeks of trial,livers were dissected,histological analysis(hematoxilineosin and Oil Red staining) and gene expression assessment of adiponectin,adiponectin receptor 2(adipor2),sirtuin-1(sirt-1),tumor necrosis factor-alpha(tnf-a),interleukin-1b(il-1b) and interleukin-10(il-10) were performed.Ultrastructural evaluations were conducted at fourth week.REsULTs Exposing zebrafish to 0.5% ethanol developed intense liver steatosis after four weeks,as demonstrated by oil red staining.In ethanol-treated animals,the main ultrastructural changes were related to cytoplasmic lipid particles and droplets,increased number of rough endoplasmic reticulum cisterns and glycogen particles.Between two and four weeks,hepatic mR NA expression of il-1b,sirt-1 and adipor2 were upregulated,indicating that ethanol triggered signaling molecules which are key elements in both hepatic inflammatory and protective responses.Adiponectin was not detected in the liver of animals exposed and not exposed to ethanol,and il-10 did not show significant difference.CONCLUsION Data suggest that inflammatory signaling and ultrastructural alterations play a significant role during hepatic steatosis in zebrafish chronically exposed to ethanol.

关键词： Ethanol Hepatic steatosis Inflammation Zebrafish Alcoholic fatty liver

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Toxoplasma gondii causes death and plastic alteration in the jejunal myenteric plexus

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World Journal of Gastroenterology 2015年第16期21卷 4829-4839页

作者： Eduardo Joséde Almeida Araújo Larissa Marchi Zaniolo suellen Laís Vicentino Marcelo Biondaro Góis Jacqueline Nelisis Zanoni Aristeu Vieira da silva Débora de Mello Goncales sant'Ana Departamento de Histologia Centro de Ciencias BiológicasUniversidade Estadual de Londrina programa de pós-graduacao em Ciencia Animal Universidade Paranaense Departamento de Ciencias Morfológicas.Universidade Estadual de Maringa Departamento de biologia Universidade Estadual de Feira de Santana

AIM:To assess the effects of ME-49 Toxoplasma gondii(T.gondii) strain infection on the myenteric plexus and external muscle of the jejunum in rats.METHODs:Thirty rats were distributed into two groups:the control group(CG)(n = 15) received 1 m L of saline solution orally, and the infected group(IG)(n=15)inoculated with 1 m L of saline solution containing500 oocysts of M-49 T.gondii strain orally.After 36 d of infection,the rats were euthanized.Infection with T.gondii was confirmed by blood samples collected from all rats at the beginning and end of the experiment.The jejunum of five animals was removed and submitted to routine histological processing(paraffin)for analysis of external muscle thickness.The remaining jejunum from the others animals was used to analyze the general population and the NADH-diaphorase,VIpergic and nitrergic subpopulations of myenteric neurons;and the enteric glial cells(s100-IR).REsULTs:serological analysis showed that animals from the IG were infected with the parasite.Hypertrophy affecting jejunal muscle thickness was observed in the IG rats(77.02±42.71)in relation to the CG(51.40±12.34),ps died(CG:39839.3±5362.3;IG:26766.6±2177.6;pperplasia of nitrergic myenteric neurons was observed(CG:7959.0±1290.4;IG:10893.0±1156.3;ppertrophy of the cell body in the remaining myenteric neurons was noted[CG:232.5(187.2-286.0);IG:248.2(204.4-293.0);ppertrophy of the smallest varicosities containing VIp neurotransmitter was seen(CG:0.46±0.10;IG:0.80±0.16;ps(CG:12.64±1.27;IG:10.09±2.10;ps observed in the infected rats.CONCLUsION:It was concluded that infection with oocysts of ME-49 T.gondii strain caused quantitative and plastic alterations in the myenteric plexus of the jejunum in rats.

关键词： Enteric nervous system Infectious diseases Glial cells Nitric oxide Neuronal plasticity smallintestine Toxoplasmosis Vasoactive intestinal peptide

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Hereditary gastric cancer:Three rules to reduce missed diagnoses

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World Journal of Gastroenterology 2020年第13期26卷 1382-1393页

作者： paula Assumpcao Taíssa Araújo André Khayat Geraldo Ishak sidney santos Williams Barra Joao Felipe Acioli Benedito Rossi paulo Assumpcao programa de pós-graduacao em Genética e biologia Molecular Universidade Federal do ParáBelém 66075-110Brazil Núcleo de pesquisas em Oncologia Universidade Federal do ParáBelém 66073-000Brazil Hospital Universitário Joao de Barros Barreto Universidade Federal do ParáBelém 66073-000Brazil Centro de Oncologia e Aconselhamento Genético Hospital Sírio LibanêsSao Paulo 01308-050Brazil

Gastric cancer remains one of the most lethal cancers.The incidence and mortality rates are quite similar.The main reason for the high mortality is diagnosis at advanced stages of disease,when treatment options are poor.One of the supposed strategies to overcome late-stage diagnosis is identifying people at high risk with the aim of establishing rigorous clinical control,including routine endoscopy and biopsies.Hereditary gastric cancer(HGC)syndromes,though representing a sizeable group to monitor for prevention or,at least,for early diagnosis,are apparently extremely rare.The low rate of HGC diagnosis might be related to the low rates of suspicion,insufficient familiarity about clinical diagnosis criteria,and the supposed conditional necessity of a molecular diagnosis.In this review,we will discuss simple measures to increase HGC diagnosis by applying three rules that might provide an opportunity for precision care to benefit the families affected by this disease.

关键词： Hereditary gastric cancer Rules Diagnosis

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Only Attract Ants?The Versatility of petiolar Extrafloral Nectaries in passiflora

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American Journal of plant sciences 2013年第2期4卷 460-469页

作者： poliana Cardoso-Gustavson Nathalia L.Andreazza Alexandra C.H.F.sawaya Marilia de Moraes Castro Pós-Graduacao em Biologia Vegetal Instituto de BiologiaUniversidade Estadual de CampinasCampinasBrazil Núcleo de pesquisa em Anatomia vegetal Instituto de BotanicaSao PauloBrazil Departamento de biologia vegetal Instituto de BiologiaUniversidade Estadual de CampinasCampinasBrazil

passiflora species presents a coevolutive relationship with Heliconiini butterflies, their primary herbivores. The Heliconiini caterpillars are able to detoxify toxic compounds produced by passiflora, thus morphological defense strategies stand out over chemical innovations. In this framework, we highlight the presence of mimetic structures and extrafloral nectaries (EFN) as morphological strategies. Heliconian butterflies oviposit only on leaves that do not possess previous eggs, so the presence of egg mimics could prevent the oviposition. EFN are glands that offer nectar to territorial and aggressive ants, establishing mutualistic relationships. Here, we present a structural and chemical analysis of petiolar EFN and nectar from passiflora alata and p. edulis in order to have insights about the implications of these features in deterring heliconian caterpillars. p. alata have one to four stipitate-crateriform EFN while p. edulis possess a pair of convex glands. Butterflies lay their eggs isolatedly or in up to three on leaves of both species. Our morphological results suggest that EFN from p. alata may act as egg mimics. Ontogenetic data suggest that the variation in the number of glands observed in this species is a serial homology, wherein the selection pressure for this variation is possibly the oviposition pattern. p. alata retain alkaloids, flavonoids and terpenoids inside nectariferous cells;sugars and flavonoids are found in the nectar of both species, while alkaloids are also detected in p. edulis. There is a selective retention/release of secondary metabolites from the EFN tissues to nectar. Knowing that these compounds can be dissuasive to some herbivores and inoffensive to others, we plotted this relationship in a consumer growth versus secondary metabolite concentration diagram. Our results suggest a more active role in the modulation of the gland defense from plants besides the establishment of a mutualistic relationship with ants, an important response in a coevolutive scenario.

关键词： passiflora alata Curtis passiflora edulis sims Egg Mimics Anatomy secondary Metabolites

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Efficacy of oral consumption of curcumin/Curcuma longa for symptom improvement in inflammatory bowel disease:A systematic review of animal models and a meta-analysis of randomized clinical trials

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BIOCELL 2022年第9期46卷 2015-2047页

作者： MARLA DE CERQUEIRA ALVEs MONIsE OLIVEIRA sANTOs NAssIB BEZERRA BUENO ORLANDO ROBERTO pIMENTEL DE ARAúJO MARíLIA OLIVEIRA FONsECA GOULART FABIANA ANDRéA MOURA programa de pós-graduacao em Nutricao(ppGNUT) Universidade Federal de Alagoas(UFAL)MaceióAL 57072-970Brazil Instituto de Química e Biotecnologia(IQB) Universidade Federal de Alagoas(UFAL)MaceióAL 57072-970Brazil programa de pós-Gradua玢o em Ciências da saúde(ppGCs) Universidade Federal de Alagoas(UFAL)MaceióAL 57072-970Brazil programa de pós-Gradua玢o da Rede Nordeste de Biotecnologia(RENORBIO) Universidade Federal de Alagoas(UFAL)MaceióAL 57072-970Brazil programa de pós-Gradua玢o em Ciências Médicas(ppGCM) Universidade Federal de Alagoas(UFAL)MaceióAL 57072-970Brazil

The roots of the vegetal Curcuma due to its high content of polyphenols,has been used successfully in several clinical situations.This review assessed the effect of curcumin/Curcuma longa on symptoms and metabolic changes in inflammatory bowel disease(IBD).A systematic review of animal models and randomized clinical trials(RCTs)was conducted by searching the following electronic databases:pubMed,CENTRAL,LILACs,science Direct,and ClinicalTrials.gov.From 997 found records,62 were included.More than 90%of the animal studies reported an improvement in macroscopic,histologic and/or functional activity;80%identified decreased oxidative and/or inflammatory biomarkers in animals treated with curcumin.Among the RCTs,intention-to-treat analysis showed that oral curcumin was effective in inducing clinical remission(n=281,RR:3.15 CI 95%[1.22–8.10]p=0.0017;i2=72.2%,p=0.006)and clinical response(n=259,RR:1.60 CI 95%[1.09–2.35]p=0.0017;i2=59.7%,p=0.042)but not endoscopic remission(n=161,RR:2.91 CI 95%[0.58–14.58]p=0.195;i2=72.7%,p=0.026).These results confirm that oral supplementation with curcumin/Curcuma longa has beneficial actions in animal colitis and,when associated with drug therapy,is effective in the treatment of patients with IBD.

关键词： Ulcerative colitis Crohn’s disease Oxidative stress Curcuma Turmeric

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