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1.
Environ Pollut ; 322: 121072, 2023 Apr 01.
Article in English | MEDLINE | ID: mdl-36720339

ABSTRACT

This work describes the spatio-temporal distribution of suspected plastic and microplastic (MP) particles in estuarine plumes and analyzes the microplastic/zooplankton ratio. Subsurface hauls with a conical-cylindrical net were deployed in the coastal area of Tamandare (Pernambuco, Brazil), covering the plume of two rivers and a bay adjacent to coral reefs. A total of 2079 suspected plastic particles were detected, mostly fibers and fragments (>60%). Organic matter digestion was made using a 30% hydrogen peroxide solution, of which approximately 50% of suspected particles were validated as MPs. The average MP abundance was significantly higher during the high rainfall season (53.8 ± 89.6 and 18.8 ± 32.3 particles/m³, respectively), with higher values registered in the plume area (108.9 ± 158.5 and 44.6 ± 55.5 particles/m³). Polymer identification using FT-IR confirmed that suspected particles were mainly polypropylene, polyamide, and polyurethane. These results confirm the hypothesis of a temporal transport variation of MPs from the river to the coastal environments, particularly since the plume influences debris input. Eleven animal phyla were identified, and the subclass Copepoda was predominant (90%), particularly the nauplius stage (70%). Over 70% of verified MPs range between 20 and 2000 µm, equivalent to the most common size of zooplanktonic organisms. Results support that coastal areas near estuarine plumes are exposed to microplastic contamination, affecting species dependent on zooplankton in marine coastal food webs.


Subject(s)
Water Pollutants, Chemical , Zooplankton , Animals , Microplastics , Plastics , Brazil , Spectroscopy, Fourier Transform Infrared , Water Pollutants, Chemical/analysis , Environmental Monitoring
2.
Plant Biol (Stuttg) ; 25(1): 198-207, 2023 Jan.
Article in English | MEDLINE | ID: mdl-36394440

ABSTRACT

Intralaminar galls of Meunieriella result from ground tissue proliferation in leaves of Avicennia schaueriana, a typical halophytic mangrove. We tested if the preferred sites of gall induction were the midribs and secondary veins (SV) at the basal leaf portion, where the galls were expected to be largest; and if the vascular system in galls and adjacent regions was altered to favour water supply in galls, thus increasing their growth. Gall induction sites and gall sizes were quantified according to leaf portions and regions. Anatomical and histometric analyses in vascular and ground tissues of galls and adjacent regions were compared to equivalent regions of non-galled leaves. The galls were largest at basal sites on leaves, the midrib and SV. More galls occurred on the apical portion of the leaf, and on the leaf blade and secondary vein regions. Changes in shape and vascular system area, number and diameter of vessel elements were detected in both galls and adjacent regions. Fewer and smaller-sized vessel elements were observed in regions proximal to the galls and inside them. Gall size is not related with preferred induction sites, which could be explained by factors such as thermal balance. Alterations in the vascular system indicate reduced hydraulic conductivity in the xylem in the proximal region and inside galls, leading to water leakage to gall parenchyma cells. This compensatory mechanism explains the expansion and proliferation of water storage and spongy parenchyma cells in the galls, explaining the higher growth in more vascularized regions.


Subject(s)
Acanthaceae , Avicennia , Plant Leaves , Water , Plant Tumors
3.
Article in Portuguese | LILACS | ID: biblio-1353490

ABSTRACT

RESUMO: A Artrogripose Múltipla Congênita (AMC) é uma síndrome rara, que representa um grupo de condições congênitas caracterizado por contraturas articulares em duas ou mais articulações, não progressivas, geralmente simétricas, de etiologia desconhecida e que pode estar associada a outras malformações, como viscerais e neurológicas. Apresenta-mos dois casos isolados com achados característicos de AMC, atendidos em ambulatório de pediatria de alto risco de uma cidade do Oeste do Paraná. Caso 1: lactente, sexo feminino, 14 dias de vida, com redução dos movimentos fetais referidos pela mãe, apresentando malformações envolvendo somente os membros, visualizadas logo após o nasci-mento. Caso 2: lactente, sexo masculino, quatro meses de vida, com diagnóstico de hipocinesia fetal ao ultrassom obstétrico de 23 semanas, ao nascimento apresenta contraturas dos membros e disfunção do sistema nervoso cen-tral. O diagnóstico da artrogripose é complexo e essencialmente clínico, sendo necessária uma anamnese meticulosa, contemplando uma avaliação da gestação, via de parto, história familiar e um exame físico minucioso, classificando quais os tipos de contraturas, membros envolvidos, presença de musculatura alterada e de alterações neurológicas, a fim de diferenciar a AMC das outras síndromes que também cursam com contraturas articulares. O seguimento e tratamento dos lactentes com artrogripose devem ocorrer em acompanhamento multidisciplinar devido às variadas manifestações que a doença pode apresentar e à característica de recidiva ao longo dos anos. (AU)


ABSTRACTArthrogryposis Multiple Congenita (AMC) is a rare syndrome that represents a group of congenital conditions character-ized by joint contractures in two or more joints, non-progressive, usually symmetrical, of unknown etiology and which may be associated with other malformations, such as visceral and neurological. We present two isolated cases with characteristic features of AMC, seen in a high-risk pediatrics outpatient clinic in a city in western Paraná. Case 1: infant, female, 14 days old, with reduced fetal movements reported by the mother, presenting malformations involving only the limbs, seen immediately after birth. Case 2: infant, male, four months old, diagnosed with fetal hypokinesia on 23-week obstetric ultrasound, at birth, presents limb contractures and central nervous system dysfunction. The diagnosis of ar-throgryposis is complex and essentially clinical, requiring a meticulous anamnesis, including an assessment of pregnan-cy, delivery, family history and a thorough physical examination, classifying what types of contractures, involved limbs, presence of altered musculature and neurological changes to differentiate AMC from other syndromes that also have joint contractures. The aftercare and treatment of infants with arthrogryposis must occur in multidisciplinary follow-up due to the varied manifestations that the disease may present and the characteristic of recurrence over the years. (AU)


Subject(s)
Humans , Female , Infant , Arthrogryposis , Congenital Abnormalities , Contracture , Extremities , Integrality in Health , Immobilization
4.
World J Gastrointest Pathophysiol ; 12(3): 51-58, 2021 May 22.
Article in English | MEDLINE | ID: mdl-34084592

ABSTRACT

BACKGROUND: Cytomegalovirus (CMV) is the most common viral pathogen after liver transplantation (LT). Although reactivation of CMV infection is generally described in the context of immunosuppression, it has also been described in critically ill immunocompetent patients including cirrhotic patients. AIM: To determine the incidence of reactivated CMV prior to LT. METHODS: This was a prospective cohort study evaluating adult patients who underwent LT between 2014 and 2016. A plasma sample was obtained from all patients for CMV quantitative real-time PCR testing right before transplantation. Patients were followed for at least 1 year to assess the following outcomes: Incidence of CMV infection, organ rejection and overall mortality. RESULTS: A total of 72 patients were enrolled. Four patients died before transplantation, thus 68 patients were followed up for a median of 44 mo (20-50 mo). In 23/72 patients (31.9%) CMV was reactivated before transplantation. Post-transplantation, 16/68 (23.5%) patients had CMV infection and that was significantly associated with the recipient being CMV negative and a CMV-positive donor. Pre-transplant CMV reactivation was not associated with overall mortality (log rank: 0.9). CONCLUSION: This study shows that CMV infection is common in patients with chronic liver disease just before LT, but the clinical impact of this infection seems to be negligible.

5.
PLoS One ; 16(4): e0249672, 2021.
Article in English | MEDLINE | ID: mdl-33886596

ABSTRACT

BACKGROUND: Limited data is available regarding the frequency of COVID-19 in populations that are highly exposed to SARS-CoV-2. In this cross-section study we evaluated COVID-19 seroprevalence in military police forces of 10 major cities in Rio Grande do Sul, South of Brazil. METHODS: Sampling was randomly performed in clusters, in respect to the number of professionals at service per city and military unit. Research subjects were evaluated on July 23, 2020 (first wave peak in Brazil). Clinical information was obtained, and venous blood was taken for ELISA testing (IgA, and IgG antibodies). Sample size consisted of 1,592 military workers (33.6% of study population). They were mostly man (81.2%) and young (median 34 years-old). Most had been asymptomatic (75.3%) during pandemic, and 27.5% reported close contact with COVID-19 cases (after a median time of 21 days). Antibodies were detected in 3.3% of the participants, mostly IgA (2.7%), and IgG (1.7%). After 3 weeks, 66.7% of IgA and IgG results turned negative, in addition to 78.3% and 100% of borderline IgA and IgG results, respectively. CONCLUSION: The seroprevalence of COVID-19 amongst military police was at least 3.4 higher than the findings of other studies performed in the general population, in the same cities and dates. Most detectable antibodies were of IgA class, which implies recent exposure. Asymptomatic people were more prone to have negative antibody titters in the second run.


Subject(s)
COVID-19/epidemiology , Adult , Brazil/epidemiology , COVID-19/diagnosis , COVID-19 Serological Testing , Cross-Sectional Studies , Female , Humans , Male , Middle Aged , Military Personnel , Pandemics , Police , SARS-CoV-2/isolation & purification , Seroepidemiologic Studies
6.
J Vet Med Sci ; 82(10): 1562-1569, 2020 Oct 30.
Article in English | MEDLINE | ID: mdl-32863320

ABSTRACT

This study aimed to investigate the effects of maintenance enteral electrolytic solutions administered naso-ruminally in continuous flow in adult goats subjected to water and food restriction. Six adult non-pregnant and non-lactating female goats, aged between two and five years old, were used in a crossover (6 × 2) study. Solution 1 (SEE1) comprised: 4.5 g sodium chloride (NaCl); 1 g potassium chloride (KCl); 0.5 g magnesium chloride (MgCl); 1 g calcium chloride in 1,000 ml of water (measured osmolarity: 202 mOsm/l). Solution 2 (SEE2) comprised: 4.5 g of NaCl; 1 g of KCl; 0.5 g of MgCl; 2 g of calcium acetate in 1,000 ml of water (measured osmolarity: 212 mOsm/l). The solutions were administered naso-ruminally at a dose rate of 15 ml/kg/hr, for 12 hr. The animals were evaluated at times T-24, T0, T4, T8, T12, and T24. Both enteral electrolytic solutions were effective in expanding blood volume. SEE1 showed a low-intensity acidifying potential, while SEE2 showed behavior of a neutral enteral electrolytic solution.


Subject(s)
Electrolytes/administration & dosage , Goats , Administration, Intranasal/veterinary , Administration, Oral , Animals , Blood Gas Analysis/veterinary , Cross-Over Studies , Electrolytes/blood , Female , Osmolar Concentration , Potassium Chloride/administration & dosage , Potassium Chloride/blood , Random Allocation , Rumen , Sodium Chloride/administration & dosage , Sodium Chloride/blood
7.
Plant Biol (Stuttg) ; 21(6): 1052-1062, 2019 Nov.
Article in English | MEDLINE | ID: mdl-31102569

ABSTRACT

The galls induced by Ditylenchus gallaeformans (Nematoda) on leaves of Miconia albicans have unique features when compared to other galls. The nematode colonies are surrounded by nutritive tissues with promeristematic cells, capable of originating new emergences facing the larval chamber, and providing indeterminate growth to these galls. Considering enzyme activity as essential for the translocation of energetic molecules from the common storage tissue (CST) to the typical nutritive tissue (TNT), and the major occurrence of carbohydrates in nematode galls, it was expected that hormones would mediate sink strength relationships by activating enzymes in indeterminate growth regions of the galls. Histochemical, immunocytochemical and quantitative analyses were made in order to demonstrate sites of enzyme activity and hormones, and comparative levels of total soluble sugars, water soluble polysaccharides and starch. The source-sink status, via carbohydrate metabolism, is controlled by the major accumulation of cytokinins in totipotent nutritive cells and new emergences. Thus, reducing sugars, such as glucose and fructose, accumulate in the TNT, where they supply the energy for successive cycles of cell division and for nematode feeding. The histochemical detection of phosphorylase and invertase activities indicates the occurrence of starch catabolism and sucrose transformation into reducing sugars, respectively, in the establishment of a gradient from the CST towards the TNT. Reducing sugars in the TNT are important for the production of new cell walls during the indeterminate growth of the galls, which have increased levels of water-soluble polysaccharides that corroborate such a hypothesis. Functional relationship between plant hormone accumulation, carbohydrate metabolism and cell differentiation in D. gallaeformans-induced galls is attested, providing new insights on cell development and plant metabolism.


Subject(s)
Melastomataceae/metabolism , Melastomataceae/parasitology , Nematoda/pathogenicity , Plant Leaves/metabolism , Plant Leaves/parasitology , Plant Tumors/parasitology , Animals , Carbohydrate Metabolism , Cytokinins/metabolism , Netherlands , Plant Growth Regulators/metabolism
8.
Braz J Med Biol Res ; 52(4): e8595, 2019.
Article in English | MEDLINE | ID: mdl-30994733

ABSTRACT

Sepsis remains a major cause of morbidity and mortality worldwide, with increased burden in low- and middle-resource settings. The role of the inflammatory response in the pathogenesis of the syndrome has supported the modern concept of sepsis. Nevertheless, a definition of sepsis and the criteria for its recognition is a continuous process, which reflects the growing knowledge of its mechanisms and the success and failure of diagnostic and therapeutic interventions. Here we review the evolving concepts of sepsis, from the "systemic inflammatory response syndrome triggered by infection" (Sepsis-1) to "a severe, potentially fatal, organic dysfunction caused by an inadequate or dysregulated host response to infection" (Sepsis-3). We focused in the pathophysiology behind the concept and the criteria for recognition and diagnosis of sepsis. A major challenge in evaluating the host response in sepsis is to characterize what is protective and what is harmful, and we discuss that, at least in part, the apparent dysregulated host response may be an effort to adapt to a hostile environment. The new criteria for recognition and diagnosis of sepsis were derived from robust databases, restricted, however, to developed countries. Since then, the criteria have been supported in different clinical settings and in different economic and epidemiological contexts, but still raise discussion regarding their use for the identification versus the prognostication of the septic patient. Clinicians should not be restricted to definition criteria when evaluating patients with infection and should wisely use the broad array of information obtained by rigorous clinical observation.


Subject(s)
Sepsis/immunology , Sepsis/physiopathology , Humans , Lactic Acid/blood , Medical Illustration , Organ Dysfunction Scores , Sepsis/diagnosis , Sepsis/metabolism
9.
J Invertebr Pathol ; 164: 23-31, 2019 06.
Article in English | MEDLINE | ID: mdl-30930188

ABSTRACT

Baculovirus natural populations are known to be genetically heterogeneous and such genotypic diversity could have implications in the performance of biocontrol agents. The Anticarsia gemmatalis nucleopolyhedrovirus (AgMNPV) has been widely used to control the velvetbean caterpillar, Anticarsia gemmatalis, in Brazil. In the present work, morphological and molecular analyses as well as the biological activity of AgMNPV genotypes derived from a Brazilian field isolate (AgMNPV-79) were carried out. The existence of genotypic variants in the population was confirmed by DNA restriction analysis. Although difference in virulence was observed among the variants, the most (Ag79-01) and the least (AgL-16) virulent clones do not show any morphological and cytopathological changes when compared to the most studied isolate (AgMNPV-2D). The complete genome analysis of the two viral clones showed the presence of single open reading frames (ORFs) of the pe-38 and he65 genes, which contrasts with the two split ORFs present in the genome of the AgMNPV-2D isolate. The viral clone AgL-16 has many variations in the ie-2 and pe-38 genes, which are transcription regulatory genes responsible for the regulation of viral early gene expression during insect cell infection. Furthermore, other genes showed alterations like the odv-e56, which have an essential role in the maturation and envelopment of the ODVs, and bro-a and bro-b genes which were fused to form a single ORF. For the Ag79-01, although the total number of single nucleotide variants (SNVs) was more prominent in the pe-38 gene, its genome showed very few modifications in comparison to the AgMNPV-2D genome.


Subject(s)
Lepidoptera/virology , Nucleopolyhedroviruses , Virulence/genetics , Animals , Biological Assay , Cell Line , Genes, Viral , Genetic Variation , Genome, Viral , Nucleopolyhedroviruses/genetics , Nucleopolyhedroviruses/pathogenicity , Nucleopolyhedroviruses/ultrastructure , Pest Control, Biological , Phylogeny , Sf9 Cells
10.
Med Oral Patol Oral Cir Bucal ; 24(2): e165-e171, 2019 Mar 01.
Article in English | MEDLINE | ID: mdl-30818308

ABSTRACT

BACKGROUND: Neurodegenerative diseases that affect the cerebellum, especially in elderly individuals, cause impairment of motor coordination and quality of life. The presente study evaluated the electromyographic activity and thickness of the right and left masseter and temporal muscles, and the maximum molar bite force of individuals with spinocerebellar ataxia. MATERIAL AND METHODS: Twenty-eight individuals were divided into two groups: those with (n=14) and without (n=14) spinocerebellar ataxia. Data on the masticatory muscles obtained from the electromyographic activity (resting, right and left laterality and protrusion), muscle thickness (maximal voluntary contraction and tensile strength) and maximum bite force (right and left) were tabulated and descriptive analysis using Student's t-test (P ≤ 0.05). RESULTS: In the comparison between groups, greater electromyographic activity was demonstrated for individuals with spinocerebellar ataxia, with a statistically significant difference in protrusion and laterality for the temporal muscles (P = 0.05). There was no statistically significant difference between the groups for masticatory muscles thickness in the conditions evaluated. For maximum molar bite force, the group with spinocerebellar ataxia showed lower bite force (P ≤ 0.05). CONCLUSIONS: The data obtained suggest that spinocerebellar ataxia promotes functional reduction in the stomatognathic system, mainly affecting the electromyographic activity and bite force, hindering chewing, with a resultant alteration of nutritional intake and a decrease of quality of life.


Subject(s)
Bite Force , Spinocerebellar Ataxias/physiopathology , Stomatognathic System/physiopathology , Adult , Brazil , Case-Control Studies , Dental Occlusion , Electromyography , Female , Functional Laterality , Humans , Male , Mandible , Masseter Muscle/physiopathology , Mastication , Masticatory Muscles/physiopathology , Middle Aged , Molar , Prospective Studies , Quality of Life , Temporal Muscle/physiopathology , Temporomandibular Joint Disorders/physiopathology
11.
Plant Biol (Stuttg) ; 21(5): 844-853, 2019 Sep.
Article in English | MEDLINE | ID: mdl-30927480

ABSTRACT

Environmental cadmium (Cd) sources have increased in mangrove sediments in recent decades, inducing cellular damage to many plants. Avicennia schaueriana is abundant in mangrove sites and has been subject to Cd contamination. The possible effects of Cd toxicity and the structural and physiological disturbances to this plant were studied. Can this plant express early cellular tolerance mechanisms to such metal contamination? Seedlings of A. schaueriana were collected from sites of their natural occurrence, placed in plastic pots containing nutrient solution for 60 days, and subsequently exposed to increasing Cd concentrations for 5 days under experimental conditions. The anatomical, ultrastructural and physiological changes induced by Cd were analysed. Cd accumulated mainly in the root system and in pneumatophores, stems and leaves, induced differential accumulation of mineral nutrients, but did not induce necrosis or changes in leaf anatomy. However, there was a decrease in starch grains and an increase in deposited electron-dense material in the cortex and vascular bundles. Cd induced both increases in calcium (Ca) content in shoots and Ca oxalate crystal precipitation in leaf mesophyll and was detected in crystals and in the secretion of salt glands. Our observations and experimental results provide evidence of Cd tolerance in A. schaueriana. As a new feature, despite the clear cellular physiological disorders, this plant is able to eliminate Cd through leaf salt glands and immobilise it in Ca crystals, representing fast mechanisms for Cd exclusion and complexation in leaves in heavy metal coastal polluted marine ecosystems.


Subject(s)
Avicennia/drug effects , Cadmium/toxicity , Plant Leaves/metabolism , Avicennia/metabolism , Avicennia/ultrastructure , Cadmium/metabolism , Calcium/metabolism , Microscopy, Electron, Transmission , Plant Roots/metabolism , Plant Stems/metabolism , Seedlings/drug effects , Seedlings/metabolism , Seedlings/ultrastructure
12.
Rev. bras. pesqui. méd. biol ; Braz. j. med. biol. res;52(4): e8595, 2019. tab, graf
Article in English | LILACS | ID: biblio-1001508

ABSTRACT

Sepsis remains a major cause of morbidity and mortality worldwide, with increased burden in low- and middle-resource settings. The role of the inflammatory response in the pathogenesis of the syndrome has supported the modern concept of sepsis. Nevertheless, a definition of sepsis and the criteria for its recognition is a continuous process, which reflects the growing knowledge of its mechanisms and the success and failure of diagnostic and therapeutic interventions. Here we review the evolving concepts of sepsis, from the "systemic inflammatory response syndrome triggered by infection" (Sepsis-1) to "a severe, potentially fatal, organic dysfunction caused by an inadequate or dysregulated host response to infection" (Sepsis-3). We focused in the pathophysiology behind the concept and the criteria for recognition and diagnosis of sepsis. A major challenge in evaluating the host response in sepsis is to characterize what is protective and what is harmful, and we discuss that, at least in part, the apparent dysregulated host response may be an effort to adapt to a hostile environment. The new criteria for recognition and diagnosis of sepsis were derived from robust databases, restricted, however, to developed countries. Since then, the criteria have been supported in different clinical settings and in different economic and epidemiological contexts, but still raise discussion regarding their use for the identification versus the prognostication of the septic patient. Clinicians should not be restricted to definition criteria when evaluating patients with infection and should wisely use the broad array of information obtained by rigorous clinical observation.


Subject(s)
Humans , Sepsis/physiopathology , Sepsis/immunology , Sepsis/diagnosis , Sepsis/metabolism , Lactic Acid/blood , Organ Dysfunction Scores , Medical Illustration
13.
Br Poult Sci ; 59(4): 396-401, 2018 Aug.
Article in English | MEDLINE | ID: mdl-29737191

ABSTRACT

1. The aim of this study was to analyse the association between Escherichia coli isolates recovered from turkeys and the expression of beta-lactamase genes, such as extended spectrum beta-lactamase (ESBL) and ampicillin class C (AmpC). The phenotype of the resistance profile was examined using the association between amoxicillin and ceftiofur resistance. 2. Results showed that 84% from the turkey isolates harboured 4 or 5 genes associated with the CoIV plasmid. In an antibiogram test, 82% of the isolates were multidrug-resistant, the highest levels of resistance being against erythromycin (99%) and amoxicillin (76.1%). ESBL-positive groups were 31% positive for the ctx-m-2 gene, 6.8% were positive for ctx-m-8 and 70% harboured the tem wild gene. 3. All positive isolates from the AmpC beta-lactamase-positive group harboured the cmy-2 gene. The presence of the cmy-2 gene was associated with both the CTX-group genes and resistance to ceftiofur. 4. There was a high prevalence of avian pathogenic E. coli in suspected cases of colibacillosis in turkeys and a high antimicrobial resistance index. The results highlighted the risk of ceftiofur resistance and the presence of both ESBL and AmpC beta-lactamase E. coli in the turkey production chain.


Subject(s)
Bacterial Proteins/genetics , Drug Resistance, Bacterial , Escherichia coli Infections/veterinary , Escherichia coli/drug effects , Poultry Diseases/epidemiology , Turkeys , beta-Lactamases/genetics , Animals , Anti-Bacterial Agents/pharmacology , Bacterial Proteins/metabolism , Brazil/epidemiology , Cephalosporins/pharmacology , Escherichia coli/genetics , Escherichia coli/physiology , Escherichia coli Infections/epidemiology , Escherichia coli Infections/microbiology , Phenotype , Poultry Diseases/microbiology , Prevalence , beta-Lactamases/metabolism
14.
Plant Biol (Stuttg) ; 20(3): 507-515, 2018 May.
Article in English | MEDLINE | ID: mdl-29350452

ABSTRACT

The success of galling insects could be determined by synchronisation with host plant phenology and climate conditions, ensuring suitable oviposition sites for gall induction and food resources for their survival. The anatomical, histochemical and phenological synchronisation strategies between Calophya rubra (Blanchard) (Hemiptera: Psylloidea) and its host, the evergreen plant Schinus polygama (Cav.) (Cabrera) (Anacardiaceae), in the Mediterranean climate of southern Chile was evaluated and compared to that of the congeneric C. cf. duvauae (Scott) from Brazil and closely related host plant S. engleri in a subtropical climate. Anatomical, histometric, histochemical and vegetative phenology studies of the stem and galls were conducted from June 2015 to December 2016. Based on the anatomical, histometric and histochemical analysis, the conical stem gall traits imply gains over the non-galled stem toward the galling insect survival, but the maintenance of phellem, secretory ducts and pith indicate conservative developmental traits that cannot be manipulated by C. rubra. Our results indicate that the conditions of the Mediterranean climate zone limit C. rubra immature activity during unfavourable periods, probably determining a diapause period and a univoltine life cycle, which are peculiarities of the S. polygama- C. rubra system. The synchronisation between development and seasonality confers peculiarities to the S. polygama- C. rubra system in the Mediterranean climate zone.


Subject(s)
Anacardiaceae/parasitology , Hemiptera/physiology , Plant Tumors/parasitology , Anacardiaceae/anatomy & histology , Animals , Chile , Life Cycle Stages/physiology , Plant Stems/anatomy & histology , Plant Stems/parasitology
16.
Plant Biol (Stuttg) ; 20(1): 101-112, 2018 Jan.
Article in English | MEDLINE | ID: mdl-28977737

ABSTRACT

Three synchronopatric Cactaceae species, Echinopsis rhodotricha, Harrisia balansae and Praecereus saxicola, have mostly nocturnal anthesis and similar flowers, characteristics that motivated us to perform a comparative study of reproductive ecology. Reproductive phenology was sampled monthly from December 2014 to November 2015. We describe floral biology, breeding system via pollination treatments and evaluate floral visitors from focal and filming observations. Pollen grains found on moth proboscis were compared among cactus species under light microscopy. We used fluorescent dye particles to test intra- and interspecific pollen flow. These three species have extended flowering with greater intensity in the wet season, causing high overlap. They have white and hypocrateriformis flowers that open at twilight or nightfall and last about 15 h. H. balansae seems to be self-incompatible, while E. rhodotricha presented self-compatibility. P. saxicola presented self-fertility, but most of the population seems to be self-incompatible. We suggest sphingophily for the three species, but only P. saxicola was visited by Manduca rustica (Sphingidae). However, we observed pollen grains of all three species on the proboscis of moths, especially M. rustica and M. sexta. Prolonged anthesis allowed bees (herein considered as secondary pollinators) to visit flowers of E. rhodotricha and P. saxicola. It can be concluded that the studied species share nocturnal and diurnal pollinators, suggesting interspecific pollen flow, which, however, could not be detected with fluorescent dye particles. In view of the low frequency of primary pollinators, it appears that these three species have different reproductive strategies, ensuring the fruiting and production of viable seeds.


Subject(s)
Cactaceae/physiology , Pollen/physiology , Pollination , Adaptation, Physiological/physiology , Animals , Brazil , Ecology , Flowers/physiology , Moths/physiology , Pollination/physiology , Reproduction/physiology , Time Factors
17.
Plant Physiol Biochem ; 122: 57-64, 2018 Jan.
Article in English | MEDLINE | ID: mdl-29175637

ABSTRACT

Leaf water uptake (LWU) has been observed in plants of different ecosystems and this process is distinct among different species. Four plant species from the Brazilian fog mountain fields were evaluated in order to detect if leaf water uptake capacity is related to the cell wall composition of leaf epidermis. LWU measurements and their relation to anatomical and biochemical traits were analyzed. Cell wall composition was verified through immunocytochemistry using monoclonal antibodies recognizing pectin compounds, and histochemistry with calcofluor white to track cellulose. Differences in LWU among the four species were clearly revealed. Two species presented higher maximum leaf water content and the lowest values of water absorption speed. The other two species presented opposite behavior, namely, low leaf water uptake and the highest values of water absorption speed. The anatomical traits associated with the cell wall composition corroborated the data on the different LWU strategies. The species with abundant detection of cellulose in their epidermal cell walls absorbed more water, but more slowly, while those with abundant detection of pectins absorbed water at a higher speed. These results indicate that cell wall composition regarding pectin and cellulose are significant for water uptake by the leaf epidermis. Pectin provides greater porosity and absorption speed, while cellulose provides greater hydrophilicity and greater water uptake capacity. Current data indicate that the composition of epidermal cell walls is a relevant trait for leaf water uptake.


Subject(s)
Cellulose/metabolism , Ecosystem , Pectins/metabolism , Plant Leaves/metabolism , Plants/metabolism , Tropical Climate
18.
Arq. bras. med. vet. zootec. (Online) ; 70(2): 588-596, mar.-abr. 2018. tab
Article in Portuguese | LILACS, VETINDEX | ID: biblio-910869

ABSTRACT

Objetivou-se verificar o efeito da suplementação de diferentes relações de zinco orgânico e de cobre inorgânico, bem como comparar os resultados com a dieta controle de codornas japonesas, sobre o desempenho produtivo e a qualidade dos ovos. Foram realizados dois experimentos na área experimental da Universidade Federal do Espírito Santo: variando os níveis de zinco orgânico e mantendo os de cobre recomendados e outro variando os níveis de cobre inorgânico. O período experimental foi de 84 dias, divididos em períodos de 21 dias. Foram usadas cinco pré-misturas minerais. Foram analisadas variáveis de desempenho e qualidade dos ovos. Foi observado primeiramente que as variáveis avaliadas não foram afetadas de forma significativa pelas diferentes relações dos minerais, exceto para pesos relativo e absoluto da casca. No segundo ensaio, não houve interação entre os níveis de zinco e de cobre nem entre estes e a dieta controle, para nenhuma das variáveis observadas; quando analisadas as médias individuais, foi observada diferença significativa para taxa de postura, relação ovos comerciais e totais, consumo de ração e na unidade Haugh. Pode-se concluir que a relação de 35mg/kg de zinco orgânico e a de 3,5mg/kg de cobre inorgânico atenderam as necessidades nutricionais dos animais para desempenho e qualidade de ovos.(AU)


The objective of this study was to verify the effect of the supplementation of different organic zinc and inorganic copper ratios and to compare the results with the Japanese quail control diet on the productive performance and egg quality. Two experiments were carried out in the experimental area of the Federal University of Espírito Santo, varying the levels of organic zinc and maintaining the recommended copper and the other varying levels of inorganic copper. The experimental period was 84 days. Five mineral premixes were used. Performance and egg quality variables were analyzed. It was first observed that the evaluated variables were not affected significantly by the different mineral relations, except for relative and absolute weight of the bark. In the second test, there was no interaction between the zinc and copper levels, neither between the control and the control diet, for any of the variables observed, when analyzing the individual means, a significant difference was observed for posture rate, commercial and total eggs ratio, feed intake, and in the Haugh Unit. It can be concluded that the ratio of 35mg/kg organic zinc and 3,5mg/kg of inorganic copper met the nutritional requirements of the animals for performance and egg quality.(AU)


Subject(s)
Animals , Animal Feed/analysis , Coturnix/metabolism , Zinc/administration & dosage
19.
Rev. colomb. gastroenterol ; 33(1): 57-60, 2018. graf
Article in Spanish | LILACS | ID: biblio-900728

ABSTRACT

Resumen La endosonografía nació hace más de 30 años como parte de las modalidades diagnósticas de patologías benignas y malignas del tracto gastrointestinal. En los últimos años se ha demostrado la eficacia y seguridad superior de la biopsia con aguja fina de las glándulas suprarrenales por vía transgástrica (izquierda) o tranduodenal (derecha) guiadas por endosonografía, en comparación con los abordajes percutáneos guiados por tomografía axial computarizada (TAC) o ecografía. Uno de los diagnósticos diferenciales de insuficiencia suprarrenal con evidencia de masas en glándulas suprarrenales es la paracoccidioidomicosis, a pesar de ser una entidad de presentación exclusiva de las áreas geográficas de Latinoamérica, donde se encuentra su agente etiológico. Se presenta un caso de paciente con paracoccidioidomicosis con insuficiencia suprarrenal y engrosamiento adrenal bilateral, cuyo diagnóstico se logró mediante biopsia transgástrica de glándula suprarrenal izquierda guiada por endosonografía.


Abstract Endosonography, born more than 30 years ago, is one diagnostic modality for benign and malignant pathologies of the gastrointestinal tract. In recent years, transgastric (left) or transduodenal (right) fine needle biopsies of the adrenal glands guided by endosonography has been demonstrated to be safer and more efficacious than percutaneous approaches guided by CT or ultrasound. Differential diagnoses of adrenal insufficiency with evidence of masses in adrenal glands must consider paracoccidioidomycosis despite the fact that it is exclusively present in Latin America where its etiological agent is found. We present a case of paracoccidioidomycosis with adrenal insufficiency and bilateral adrenal thickening whose diagnosis was achieved by transgastric biopsy of the left adrenal gland guided by endosonography.


Subject(s)
Humans , Male , Middle Aged , Paracoccidioidomycosis , Adrenal Glands , Endosonography , Biopsy, Fine-Needle , Adrenal Insufficiency , Diagnosis
20.
Arq. bras. med. vet. zootec. (Online) ; 70(2): 588-596, mar.-abr. 2018. tab
Article in Portuguese | VETINDEX | ID: vti-19207

ABSTRACT

Objetivou-se verificar o efeito da suplementação de diferentes relações de zinco orgânico e de cobre inorgânico, bem como comparar os resultados com a dieta controle de codornas japonesas, sobre o desempenho produtivo e a qualidade dos ovos. Foram realizados dois experimentos na área experimental da Universidade Federal do Espírito Santo: variando os níveis de zinco orgânico e mantendo os de cobre recomendados e outro variando os níveis de cobre inorgânico. O período experimental foi de 84 dias, divididos em períodos de 21 dias. Foram usadas cinco pré-misturas minerais. Foram analisadas variáveis de desempenho e qualidade dos ovos. Foi observado primeiramente que as variáveis avaliadas não foram afetadas de forma significativa pelas diferentes relações dos minerais, exceto para pesos relativo e absoluto da casca. No segundo ensaio, não houve interação entre os níveis de zinco e de cobre nem entre estes e a dieta controle, para nenhuma das variáveis observadas; quando analisadas as médias individuais, foi observada diferença significativa para taxa de postura, relação ovos comerciais e totais, consumo de ração e na unidade Haugh. Pode-se concluir que a relação de 35mg/kg de zinco orgânico e a de 3,5mg/kg de cobre inorgânico atenderam as necessidades nutricionais dos animais para desempenho e qualidade de ovos.(AU)


The objective of this study was to verify the effect of the supplementation of different organic zinc and inorganic copper ratios and to compare the results with the Japanese quail control diet on the productive performance and egg quality. Two experiments were carried out in the experimental area of the Federal University of Espírito Santo, varying the levels of organic zinc and maintaining the recommended copper and the other varying levels of inorganic copper. The experimental period was 84 days. Five mineral premixes were used. Performance and egg quality variables were analyzed. It was first observed that the evaluated variables were not affected significantly by the different mineral relations, except for relative and absolute weight of the bark. In the second test, there was no interaction between the zinc and copper levels, neither between the control and the control diet, for any of the variables observed, when analyzing the individual means, a significant difference was observed for posture rate, commercial and total eggs ratio, feed intake, and in the Haugh Unit. It can be concluded that the ratio of 35mg/kg organic zinc and 3,5mg/kg of inorganic copper met the nutritional requirements of the animals for performance and egg quality.(AU)


Subject(s)
Animals , Coturnix/metabolism , Zinc/administration & dosage , Animal Feed/analysis
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