Proefschrift--Groningen. / Bibliography: p. [64]-65.

Proefschrift--Groningen. / Bibliography: p. [64]-65.

Plants are colonised by a vast amount of bacteria which are found in parts such as seeds, roots, leaves and fruits while fewer are found on blossoms, stems and vascular tissue. These different parts of plants make up distinct micro ecosystems which may result in different bacterial species (endophytes) colonizing these ecosystems. Such interactions could be for life or only a short period of time and may cause no significant damage or they could be latent pathogens. Isolations of both Gram negative and Gram positive bacteria have been made from an extensive range of plant species and include bacterial genera from the following groups: Firmicutes, Actinobacteria, á Proteobacteria, â Proteobacteria, and ã Proteobacteria. The focus of this study was the endophytic bacterial community of resistant, healthy and diseased Eucalyptus nitens clones, the latter of which showed symptoms of bacterial blight and die back previously described as caused by Pantoea ananatis. The endophytic bacteria of these sampled clones were studied using culturing dependent and independent methods. The focus was on the Enterobacteriaceae in order to determine whether P.ananatis is present as an endophyte of these clones. To obtain the isolates, standard culturing techniques were used, followed by sequence identification of the 16S rRNA as well as two housekeeping genes, rpoB and gyrB. Results obtained from the culturing study were compared to results obtained from a PCR-DGGE study of the same samples. Although no conclusion could be drawn as to which organism present caused the disease symptoms on the susceptible clones, it was seen that Enterobacter and Pantoea, were the most frequently isolated in both of the studies from all clones sampled. This implies that they are present as endophytes in the E.nitens clones, together with Pseudomonas and Bacillus as suggested by the DGGE study. Copyright / Dissertation (MSc)--University of Pretoria, 2012. / Microbiology and Plant Pathology / unrestricted

Made available in DSpace on 2014-06-11T19:35:05Z (GMT). No. of bitstreams: 0 Previous issue date: 2008-01-18Bitstream added on 2014-06-13T20:25:59Z : No. of bitstreams: 1 regasini_lo_dr_araiq.pdf: 3799504 bytes, checksum: 375e8fab87b85e5635496493592521b8 (MD5) / Coordenação de Aperfeiçoamento de Pessoal de Nível Superior (CAPES) / Fundação de Amparo à Pesquisa do Estado de São Paulo (FAPESP) / O estudo fitoquímico dos caules, folhas, frutos e flores de Pterogyne nitens (Caesalpinioideae) forneceu cinco substâncias inéditas: nitensidina D (42), nitensidina E (43), nitensosídeo A (45), nitensosídeo B (47), pteroginosídeo (51) e 19 substâncias conhecidas, pteroginina (1), pteroginidina (2), pedalina (7), sorbifolina (44), pedalitina (46), kaempferol (48), afzelina (49), kaempferitrina (50), quercetina (52), isoquercitrina (53), rutina (54), quercetina 3-O-soforosídeo (55), taxifolina (61), astilbina (62), ourateacatequina (63) e os ácidos cafeico (56), ferúlico (57), sinápico (58), clorogênico (59) e gálico (60) . Todos os flavonóis e flavonas foram submetidos ao ensaio bioquímico com mieloperoxidase (MPO). De maneira geral, os flavonóides com padrão catecólico no anel B mostraram maior efeito inibitório sobre a MPO que os 4’-hidroxi-flavonóides. Os flavonóides mais ativos, 46, 52, 53, 54, e 55 exibiram valores de CI50 de 3,75, 1,22, 3,75, 3,60 e 3,72 nM, respectivamente. Adicionalmente, a capacidade seqüestradora de radicais dos flavonóis e flavonas foi avaliada sobre os radicais ABTS e DPPH. Os alcalóides guanidínicos de P. nitens foram selecionados como modelos para o planejamento e síntese de análogos antitumorais e antifúngicos. Uma série de 24 substâncias sintéticas, incluindo guanidinas mono e dissubstituídas, e seus bioisósteros foi preparada empregando-se protocolos descritos na literatura com pequenas modificações. Os derivados guanidínicos sintéticos e seus análogos foram avaliados em quatro linhagens de células tumorais e nove cepas fúngicas. Os estudos de relação estrutura-atividade qualitativa foram concentrados sobre duas regiões das estruturas moleculares dos alcalóides: o núcleo guanidínico e a cadeia... / The phytochemical study of the stems, leaves, fruits and flowers of Pterogyne nitens (Caesalpinioideae) furnished five new compounds: nitensidine D (42), nitensidine E (43), nitensoside A (45), nitensoside B (47), pterogynoside (51), and 19 known compounds, pterogynine (1), pterogynidine (2), pedalin (7), sorbifolin (44), pedalitin (46), kaempferol (48), afzelin (49), kaempferitrin (50), quercetin (52), isoquercitrin (53), rutin (54), quercetin 3-O-sophoroside (55), taxifolin (61), astilbin (62), ourateacatechin (63) and caffeic (56), ferulic (57), sinapic (58), chlorogenic (59) and gallic (60) acids. All flavonols and flavones were evaluated for their myeloperoxidase (MPO) inhibitory activity. In general, flavonoids that posses the ring B with a cathecol pattern are shown to display a major inhibitory effect on MPO than 4’-hydroxyl-flavonoids. The flavonoids, 46, 52, 53, 54, and 55 were active, and exhibited IC50 values of 3,75, 1,22, 3,75, 3,60 and 3,72 nM, respectively. Additionally, the radical scavengers of the flavones and flavonols was evaluated towards ABTS and DPPH. The guanidine alkaloids from P. nitens were selected as prototype compounds for antitumor and antifungal analogue design, and a series of 24 synthetic compounds (mono and disubstituted guanidines with isoprenyl, geranyl or farnesyl groups, and bioisosters) have been prepared using synthetic protocols previously described with minor modifications. The guanidine derivatives and their analogues were evaluated towards four cancer cell lines and nine human pathogenic fungi strains. The qualitative structure-activity relationship studies were concentrated on two regions of the molecular structures of the alkaloids: at the guanidine nucleus and at the prenyl side chain. Preliminary observations on the synthetic guanidine structural features, and their biological activity could... (Complete abstract click electronic access below)

Orientador: Vanderlan da Silva Bolzani / Banca: Lucia Maria Xavier Lopes / Banca: Carlos Alberto Manssour Fraga / Banca: Carlos Alberto Montanari / Banca: Adriano Defini Andricopulo / Resumo: O estudo fitoquímico dos caules, folhas, frutos e flores de Pterogyne nitens (Caesalpinioideae) forneceu cinco substâncias inéditas: nitensidina D (42), nitensidina E (43), nitensosídeo A (45), nitensosídeo B (47), pteroginosídeo (51) e 19 substâncias conhecidas, pteroginina (1), pteroginidina (2), pedalina (7), sorbifolina (44), pedalitina (46), kaempferol (48), afzelina (49), kaempferitrina (50), quercetina (52), isoquercitrina (53), rutina (54), quercetina 3-O-soforosídeo (55), taxifolina (61), astilbina (62), ourateacatequina (63) e os ácidos cafeico (56), ferúlico (57), sinápico (58), clorogênico (59) e gálico (60) . Todos os flavonóis e flavonas foram submetidos ao ensaio bioquímico com mieloperoxidase (MPO). De maneira geral, os flavonóides com padrão catecólico no anel B mostraram maior efeito inibitório sobre a MPO que os 4'-hidroxi-flavonóides. Os flavonóides mais ativos, 46, 52, 53, 54, e 55 exibiram valores de CI50 de 3,75, 1,22, 3,75, 3,60 e 3,72 nM, respectivamente. Adicionalmente, a capacidade seqüestradora de radicais dos flavonóis e flavonas foi avaliada sobre os radicais ABTS e DPPH. Os alcalóides guanidínicos de P. nitens foram selecionados como modelos para o planejamento e síntese de análogos antitumorais e antifúngicos. Uma série de 24 substâncias sintéticas, incluindo guanidinas mono e dissubstituídas, e seus bioisósteros foi preparada empregando-se protocolos descritos na literatura com pequenas modificações. Os derivados guanidínicos sintéticos e seus análogos foram avaliados em quatro linhagens de células tumorais e nove cepas fúngicas. Os estudos de relação estrutura-atividade qualitativa foram concentrados sobre duas regiões das estruturas moleculares dos alcalóides: o núcleo guanidínico e a cadeia... (Resumo completo, clicar acesso eletrônico abaixo) / Abstract: The phytochemical study of the stems, leaves, fruits and flowers of Pterogyne nitens (Caesalpinioideae) furnished five new compounds: nitensidine D (42), nitensidine E (43), nitensoside A (45), nitensoside B (47), pterogynoside (51), and 19 known compounds, pterogynine (1), pterogynidine (2), pedalin (7), sorbifolin (44), pedalitin (46), kaempferol (48), afzelin (49), kaempferitrin (50), quercetin (52), isoquercitrin (53), rutin (54), quercetin 3-O-sophoroside (55), taxifolin (61), astilbin (62), ourateacatechin (63) and caffeic (56), ferulic (57), sinapic (58), chlorogenic (59) and gallic (60) acids. All flavonols and flavones were evaluated for their myeloperoxidase (MPO) inhibitory activity. In general, flavonoids that posses the ring B with a cathecol pattern are shown to display a major inhibitory effect on MPO than 4'-hydroxyl-flavonoids. The flavonoids, 46, 52, 53, 54, and 55 were active, and exhibited IC50 values of 3,75, 1,22, 3,75, 3,60 and 3,72 nM, respectively. Additionally, the radical scavengers of the flavones and flavonols was evaluated towards ABTS and DPPH. The guanidine alkaloids from P. nitens were selected as prototype compounds for antitumor and antifungal analogue design, and a series of 24 synthetic compounds (mono and disubstituted guanidines with isoprenyl, geranyl or farnesyl groups, and bioisosters) have been prepared using synthetic protocols previously described with minor modifications. The guanidine derivatives and their analogues were evaluated towards four cancer cell lines and nine human pathogenic fungi strains. The qualitative structure-activity relationship studies were concentrated on two regions of the molecular structures of the alkaloids: at the guanidine nucleus and at the prenyl side chain. Preliminary observations on the synthetic guanidine structural features, and their biological activity could... (Complete abstract click electronic access below) / Doutor

Dissertação (mestrado)—Universidade de Brasília, Instituto de Ciências Biológicas, Departamento de Ecologia, Programa de Pós-Graduação em Ecologia, 2007. / Submitted by Aline Jacob (alinesjacob@hotmail.com) on 2010-02-01T14:50:55Z No. of bitstreams: 1 2007_IsabelBenedettiFigueiredo.pdf: 908067 bytes, checksum: 926fc8cb60937fd40aee6989b5372ef1 (MD5) / Approved for entry into archive by Carolina Campos(carolinacamposmaia@gmail.com) on 2010-02-01T19:32:19Z (GMT) No. of bitstreams: 1 2007_IsabelBenedettiFigueiredo.pdf: 908067 bytes, checksum: 926fc8cb60937fd40aee6989b5372ef1 (MD5) / Made available in DSpace on 2010-02-01T19:32:19Z (GMT). No. of bitstreams: 1 2007_IsabelBenedettiFigueiredo.pdf: 908067 bytes, checksum: 926fc8cb60937fd40aee6989b5372ef1 (MD5) Previous issue date: 2007-07-06 / As plantas do Cerrado convivem com o fogo, natural ou antrópico, há milhares de anos. As comunidades humanas do Cerrado usam o fogo para formar e renovar as pastagens para o gado e fazer suas roças. No Jalapão, leste do estado do Tocantins, o fogo é também usado pelas comunidades locais com o intuído de promover a floração do capim dourado (Syngonanthus nitens, Eriocaulaceae). O artesanato feito com capim dourado é atualmente uma importante fonte de renda para os moradores do Jalapão e tem atraído cada vez mais pessoas. A grande expansão da atividade ameaça a sua sustentabilidade, visto que as áreas de colheita da matéria-prima são comunais e têm sido manejadas sem os devidos cuidados. Este estudo tem como objetivo avaliar o efeito do fogo em parâmetros populacionais de capim dourado em três campos úmidos no Jalapão. Testou-se o efeito de queimadas com intervalos de dois e de três anos e a roçagem na densidade total de indivíduos, densidade de indivíduos floridos, recrutamento, sobrevivência e produção e dispersão de sementes. O fogo estimulou a floração de capim dourado, e a roçagem causou a manutenção da densidade de indivíduos floridos. A exclusão do fogo causou um grande decréscimo na densidade de indivíduos floridos. A densidade total de indivíduos, o recrutamento, a sobrevivência e a curva de dispersão das sementes não foram afetados pelo fogo e pela roçagem. A grande diversidade ambiental dentro e entre os campos úmidos estudados pode ser responsável por variações nos resultados. O capim dourado é uma espécie resiliente, com grande potencial para a geração de renda para populações locais e para a conservação do Cerrado no Jalapão. Proposições de manejo de capim dourado com fogo necessitam considerar o efeito do mesmo na comunidade de plantas do campo úmido, na fauna e no empobrecimento do solo. _______________________________________________________________________________ ABSTRACT / Cerrado plants have co-existed with fire, natural or anthropic, for millions of years. Cerrado communities use fire to form and renew pastures and prepare fields for farming. In the Jalapão region, Eastern Tocantins state, fire is also used by local communities to promote golden grass (Syngonanthus nitens, Eriocaulaceae) flowering. Golden grass handicrafts are an important source of income for the Jalapão populations and have recently attracted increasing numbers of artisans and harvesters. This rapid expansion threatens sustainability of the activity, due to harvests in common areas which are not properly managed. This study seeks to evaluate the effects of fire on golden grass population parameters in three humid grasslands of Jalapão. Tests were carried out to assess the effects of clearing and burning in two and three-year intervals on the total density, density of flowering individuals, recruitment, survivorship and seed production and dispersal. Fire catalyzes golden grass flowering, while clearing maintains the density of flowering individuals. Ceasing to use fire caused a sharp decrease in the density of flowering individuals. Total density of individuals, recruitment, survivorship and seed dispersal were not affected by fire or clearing. The great environmental diversity within and among humid grasslands can be responsible for variations in results. Golden grass is a resilient species with an enormous potential for income generation and to help the Cerrado conservation in Jalapão. Proposals for golden grass fire management must take into consideration its effect on the humid grassland plant community, fauna and soil impoverishment.

Eucalypts are a major forest resource globally and the area of eucalypt plantations for pulp and paper production is expanding rapidly in Australia. Consequently, there is an increasing need to breed eucalypts with improved wood properties. Since many high value wood traits are under strong genetic control, identification of DNA markers linked to these traits will have application in breeding programs. In recent years there has been a shift in marker strategy away from QTL mapping in pedigrees to association studies in unrelated populations. In the latter approach, single nucleotide polymorphisms (SNPs) in candidate genes are screened to identify SNPs that significantly associate with wood traits. Significant SNPs could be used for marker-assisted selection (MAS) in breeding programs. The objectives of this study were to identify candidate genes that may influence pulp yield in eucalypts and to identify SNP variants in those genes that associate with superior wood and pulp traits. / Approximately 300 trees from a full-sib Eucalyptus nitens progeny derived from a wide intra specific cross were used for gene discovery. DNA microarrays containing ~5800 young xylem of cDNAs Eucalyptus grandis were screened with probes synthesised from RNA isolated from trees with either high or low pulp yield. Forty-six transcripts were differentially regulated, of which 27 were more abundant in high pulp trees and 19 were more abundant in low pulp trees. All differentially expressed cDNAs were partially sequenced and searched against existing gene databases. Six genes were selected as putative pulp yield candidate genes based on their significant similarity to genes with known function and were named EgrCesA3 (cellulose synthase), EgrNAM1 (NAM family protein), EgrXET (xyloglucan endotransglycosylase), EgrGalk (galactokinase), EgrHB1 (class III homeodomain leucine zipper protein) and EgrZnf1 (C3HC4 type zinc finger protein). / Real-Time PCR was carried out on selected genes to confirm the accuracy of the microarray results. Full length cDNAs were obtained for EgrCesA3, EgrHB1 and EgrZnf1 and the candidate genes were partially characterised. An additional candidate gene, the novel gene EgrPAAPA, was selected based on previous research due to its high expression in the cambium and its expression in eucalypt branches. EgrPAAPA was cloned by screening an E. grandis cDNA library and fully sequenced. The full length EgrPAAPA encodes a short 172 amino acid protein rich in alanine, glutamic acid and proline residues. The EgrPAAPA protein appears to be a hydroxyproline-rich glycoprotein (HRGP) and the repetitive ‘PAAPA’ motif suggests that it might play a structural role in cell wall development. Southern blot analysis revealed that E. grandis has a single copy of the EgrPAAPA gene and northern blot analysis revealed that EgrPAAPA is most strongly expressed in xylem tissues. / Allelic variation in EnCesA3, EnNAM1, EnPAAPA and EnHB1 was examined by sequencing each gene in 16 to 24 unrelated E. nitens individuals. SNPs were identified by sequence analysis and patterns of nucleotide diversity, linkage disequilibrium and the selection of suitable polymorphisms were estimated. A moderate level of nucleotide diversity (θw = 0.0056 and π = 0.0039) was observed and linkage disequilibrium was generally low, extending only a few hundred base pairs in each gene. Negative selection has been operating in EnHB1. Selected TagSNPs from EnNAM1, EnHB1 and EnPAAPA were genotyped across 300 unrelated E. nitens trees which had been phenotyped for six wood quality traits including pulp yield, cellulose, lignin, Klason lignin, microfibril angle (MFA) and density. Five highly significant genetic associations (p<0.01) were detected between several SNPs in EnHB1 and all wood quality traits except density. A significant association was also found between EnPAAPA and MFA (p<0.05). No significant associations were found with any of the EnNAM1 SNPs. The strong genetic associations between SNPs in EnHB1 and a range of wood traits is consistent with this gene’s known role as a transcription factor controlling vascular development. Validation of these associations in different populations will be necessary in order to confirm these results. Alternatively, QTL mapping can be performed in order to confirm whether QTL for wood property traits can be detected at the EnHB1 and EnPAAPA loci.

Memoria para optar al Título Profesional de Ingeniero Forestal

Made available in DSpace on 2015-03-26T14:01:13Z (GMT). No. of bitstreams: 1 texto completo.pdf: 1338814 bytes, checksum: 7845932ffe3998db89f67562073ff35a (MD5) Previous issue date: 2011-07-19 / Foi analisada, experimentalmente, o efeito da adição de antraquinona ao processo kraft convencional para produção de celulose de mistura de Eucalyptus globulus e Eucalyptus nitens. Foram analisados aumentos da velocidade da reação de deslignificação e estabilidade dos carboidratos, utilizando condições industriais de cozimento batch da Celulosa Arauco y Constitucion SA, Planta Arauco. Para alcançar kappa constante (15 e 17) foram modificados os tempos de cozimentos e foram utilizadas diferentes dosagens de antraquinona. Foram estabelecidas relações lineares entre a dosagem de antraquinona e o rendimento depurado, o teor de rejeitos, o alcali residual e o teor de sólidos no licor residual. Para a dosagem máxima de AQ utilizada (0,10%) foram obtidos, para ambos os níveis de kappa, aumentos de 1,95% e 1,32% nos rendimentos depurados, economias de 14,2% e 50,4% nas cargas de álcali e decréscimos nos tempos de cozimento de 13 e 11 minutos para kappa 15 e 17, respectivamente. / En la presente disertación se verificó de manera experimental el efecto de la adición de Antraquinona al proceso de cocción batch convencional para una mezcla industrial de Eucalyptus globulus E. nitens.; en lo que respecta a su capacidad de aumentar la velocidad de la reacción de deslignificación y proporcionar estabilidad a las hemicelulosas y celulosas de la fibra. Lo anterior se logró con experiencias de laboratorio fijando las condiciones de cocción de acuerdo a la operación de los digestores batch de Celulosa Arauco y Constitución S.A., Planta Arauco. Donde para obtener un kappa constante (15 y 17) se modificó el Factor H mediante el tiempo de cocción, en distintos niveles de carga de Antraquinona. Se pudo establecer una relación lineal entre la dosificación de Antraquinona y los parámetros estudiados: rendimiento clasificado, rechazos, álcali residual, tiempo de cocción y sólidos en el licor negro. Particularmente, para la máxima dosificación de AQ utilizada en este estudio (0,1% bms) se obtuvo para ambos niveles de Kappa respecto al blanco o testigo- un aumento de 1.95% y 1.32 de rendimiento clasificado, un ahorro de álcali de 14.2% y 50.4% y una disminución de tiempo de cocción de 13 min y 11 min para Kappa 15 y 17, respectivamente.

Made available in DSpace on 2016-12-08T16:24:10Z (GMT). No. of bitstreams: 1 PGCA12MA085.pdf: 1033063 bytes, checksum: 0a30ec4e0c41956b0ca10ba8c2ae2ddb (MD5) Previous issue date: 2012-03-06 / Coordenação de Aperfeiçoamento de Pessoal de Nível Superior / Ticks can transmit diseases causing pathogens such as the spotted fever and Lyme disease to humans and Ehrlichiosis, Babesiosis and Anaplasmosis to animals, among others. Thus the knowledge about the ixodid fauna is very important for establishing public health programs and epidemiological surveillance. In order to identify ticks in the state of Santa Catarina were examined ticks from domestic and wild animals that passed through the screening process of the Veterinary Clinical Hospital of the Center for Science Agroveterinary CAV/UDESC and animals found dead on the highways of six mesoregions of the state the Santa Catarina: Sul, Grande Florianópolis, Vale do Itajaí, Planalto Serrano, Norte and Oeste. It also analyzed the material from the collection of the Laboratory of Parasitology and Parasitic Diseases of the CAV/UDESC. The identifications were made according to the dichotomous keys of Aragão (1936) and Battesti et al. (2006). In the Sul region were identified Amblyomma aureolatum, A. ovale and Rhipicephalus (Boophilus) microplus parasitizing dogs, and a sample of A. longirostre found on a man. In the Grande Florianópolis R. (B.) microplus, Rhipicephalus sanguineus, A. aureolatum and A. ovale parasite of dogs; A. fuscum in ferret (Mustela putorius) and R. (B.) microplus, A. cajennense and Anocentor nitens in horses. Were identified in the Planalto Serrano R. (B.) microplus, R. sanguineus, A. aureolatum, A. ovale, A. tigrinum and A. cajennense parasitizing dogs, A. aureolatum parasitizing cat, graxaim (Cerdocyon thous), graxaim field (Pseudalopex gymnocercus), ocelot (Leopardus pardalis), bush dog (Cerdocyon thous), lion bay (Puma concolor) and puma (Puma concolor), A. dubitatum a capybara (Hydrochoerus hydrochoeris), A. rotundatum in puma (Puma concolor) and snake (Bohtrops) and R. (B.) microplus parasitizing deer (Mazama americana) and horse. In the Norte Region R. sanguineus, A. aureolatum, A. ovale and A. tigrinum parasitizing dogs, A. nitens in horses. In Vale do Itajaí have been identified R. (B.) microplus, R. sanguineus, A. aureolatum, A. ovale and A. cajennense in dogs, and A. cajennense and A. nitens in horses. Amblyomma ovale and A. aureolatum into a frog (Bufo marinus); A. dubitatum a capybara and A. aureolatum in wild cat (Leopardus tigrinus). In the Oeste region were identified R. (B.) microplus, R. sanguineus and A. aureolatum in dogs. The cattle were excluded from the study are known to suffer parasitism by R. (B.) microplus throughout the state. From the data obtained it appears a wide distribution of ixodid throughout the state and in different hosts and the species A. cajennense, A. dubitatum, A. fuscum, A. longirostre e A. rotundatum were identified by the first time ever in Santa Catarina / Os carrapatos são potenciais transmissores de patógenos causadores de doenças como a Febre Maculosa e Doença de Lyme ao homem, e da Erliquiose, Babesiose e Anaplasmose aos animais, entre outros. Sendo assim, o conhecimento a cerca da fauna de ixodídeos é de grande importância para o estabelecimento de programas de saúde pública e vigilância epidemiológica. Com o objetivo de identificar ixodídeos no estado de Santa Catarina foram examinados carrapatos de animais domésticos e silvestres que passaram pelo processo de triagem do Hospital de Clínicas Veterinárias do Centro de Ciências Agroveterinárias CAV/UDESC e de animais encontrados mortos em rodovias das seis mesorregiões do estado de Santa Catarina: Sul, Grande Florianópolis, Vale do Itajaí, Planalto Serrano, Norte e Oeste. Foi analisado ainda o material da coleção do Laboratório de Parasitologia e Doenças Parasitárias do CAV/UDESC. As identificações foram realizadas de acordo com as chaves dicotômicas de Aragão (1936) e Battesti et al. (2006). Na Região Sul foram identificadas Amblyomma aureolatum, A. ovale e Rhipicephalus (Boophilus) microplus parasitando cães, e uma amostra de A. longirostre encontrada sobre um homem. Na Região da Grande Florianópolis R. (B.) microplus, Rhipicephalus sanguineus, A. aureolatum e A. ovale parasitando cães; A. fuscum em furão (Mustela putorius) e R. (B.) microplus, A. cajennense e Anocentor nitens em equinos. No Planalto Serrano foram identificadas R. (B.) microplus, R. sanguineus, A. aureolatum, A. ovale, A. tigrinum e A. cajennense parasitando cães; A. aureolatum parasitando gato, graxaim (Cerdocyon thous), graxaim do campo (Pseudalopex gymnocercus), jaguatirica (Leopardus pardalis), cachorro do mato (Cerdocyon thous), leão baio (Puma concolor) e puma (Puma concolor); A. dubitatum em capivara (Hydrochoerus hydrochoeris); A. rotundatum em puma (Puma concolor) e cobra (Bohtrops); e R. (B.) microplus parasitando equino e veado (Mazama americana). Na Região Norte, R. sanguineus, A. aureolatum, A. ovale e A. tigrinum parasitando cães e A. nitens em equinos. No Vale do Itajaí foram identificados R. (B.) microplus, R. sanguineus, A. aureolatum, A. ovale e A. cajennense em cães; e A. cajennense e A. nitens em equinos. Amblyomma ovale e A. aureolatum em sapo (Bufo marinus); A. dubitatum em capivara e A. aureolatum em gato do mato (Leopardus tigrinus). Na região Oeste foram identificadas R. (B.) microplus, R. sanguineus e A. aureolatum em cães. Os bovinos foram excluídos do estudo por sabidamente sofrerem parasitismo por R. (B.) microplus em todo o Estado. Pelos dados obtidos constata-se uma ampla distribuição dos ixodídeos em todo o Estado e em diferentes hospedeiros, sendo as espécies A. cajennense, A. dubitatum, A. fuscum, A. longirostre e A. rotundatum identificadas pela primeira vez em Santa Catarina