95 results match your criteria originated amazon


Genome Characterization of Strain UTNGt2 Originated from (White Cacao) of Ecuadorian Amazon: Antimicrobial Peptides from Safety to Potential Applications.

Antibiotics (Basel) 2021 Apr 3;10(4). Epub 2021 Apr 3.

Biofood and Nutraceutics Research and Development Group, Faculty of Engineering in Agricultural and Environmental Sciences, Technical University of the North, Av. 17 de Julio s-21 y José María Córdova, Barrio El Olivo, 100150 Ibarra, Ecuador.

The genome characterization of the strain UTNGt2, isolated from wild copoazu or white cacao (), is described. A total of 31 contigs is assembled with a total length of 3,264,448 bases, with all contigs matching the core genome of different groups in the database. The genome size is 3,540,752 bases with GC content of 44. Read More

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A painful journey to antivenom: The therapeutic itinerary of snakebite patients in the Brazilian Amazon (The QUALISnake Study).

PLoS Negl Trop Dis 2021 Mar 4;15(3):e0009245. Epub 2021 Mar 4.

Department of Medicine and Nursing, School of Health Sciences, Amazonas State University, Manaus, Brazil.

Access to antivenoms is not guarranteed for vulnerable populations that inhabit remote areas in the Amazon. The study of therapeutic itineraries (TI) for treatment of snakebites would support strategies to provide timely access to users. A TI is the set of processes by which individuals adhere to certain forms of treatment, and includes the path traveled in the search for healthcare, and practices to solve their health problems. Read More

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Twenty-first century droughts have not increasingly exacerbated fire season severity in the Brazilian Amazon.

Sci Rep 2021 Feb 23;11(1):4400. Epub 2021 Feb 23.

Centro de Estudos Florestais, Instituto Superior de Agronomia, Universidade de Lisboa, 1349-017, Lisboa, Portugal.

Biomass burning in the Brazilian Amazon is modulated by climate factors, such as droughts, and by human factors, such as deforestation, and land management activities. The increase in forest fires during drought years has led to the hypothesis that fire activity decoupled from deforestation during the twenty-first century. However, assessment of the hypothesis relied on an incorrect active fire dataset, which led to an underestimation of the decreasing trend in fire activity and to an inflated rank for year 2015 in terms of active fire counts. Read More

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February 2021

A New Variant B Chromosome in Auchenipteridae: The Role of (GATA)n and (TTAGGG)n Sequences in Understanding the Evolution of Supernumeraries in Trachelyopterus.

Cytogenet Genome Res 2021 Feb 18:1-12. Epub 2021 Feb 18.

Centro de Ciências Biológicas e da Saúde, Universidade Estadual do Oeste do Paraná, Cascavel, Brazil,

Basic and molecular cytogenetic techniques were carried out in 3 Neotropical region populations of catfishes, two of Trachelyopterus galeatus (one from the marshlands of Paraguay River basin and another from Lago Catalão, Amazon River basin) and one of Trachelyopterus porosus, a sympatric population to T. galeatus from the Amazon River basin. This study aimed to describe and understand the structure and evolution of Trachelyopterus B chromosomes, mainly through physical mapping of repetitive elements. Read More

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February 2021

Genetic characterization, mechanisms and dissemination risk of antibiotic resistance of multidrug-resistant Rothia nasimurium.

Infect Genet Evol 2021 Jun 12;90:104770. Epub 2021 Feb 12.

Shandong Center for Animal Disease Control and Prevention, Jinan 250100, China. Electronic address:

Rothia nasimurium is part of the commensal flora of humans and other animals and has recently received increasing attention for its multidrug-resistance (MDR) and pathogenicity. Currently, no systematic reports characterize the genetics, mechanisms, and dissemination risks of antibiotic resistance in MDR R. nasimurium. Read More

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SARS-CoV-2 genomic surveillance in Rondônia, Brazilian Western Amazon.

Sci Rep 2021 02 12;11(1):3770. Epub 2021 Feb 12.

Oswaldo Cruz Foundation of Rondônia-FIOCRUZ/RO, Porto Velho, RO, 76812 245, Brazil.

SARS-CoV-2 has spread rapidly around the world, with Brazil currently considered an epicenter of the pandemic. The Northern region has the second highest incidence coefficient, as well as the third highest mortality rate in the country. This study aimed to investigate information about the evolutionary history of epidemic spread and genetic aspects of strains isolated on the Western Amazon, in the State of Rondônia, Brazil. Read More

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February 2021

Genomic diversity and genome-wide association analysis related to yield and fatty acid composition of wild American oil palm.

Plant Sci 2021 Mar 24;304:110731. Epub 2020 Oct 24.

Malaysian Palm Oil Board, 6, Persiaran Institusi, Bandar Baru Bangi, Kajang, Selangor, 43000, Malaysia. Electronic address:

Existing Elaeis guineensis cultivars lack sufficient genetic diversity due to extensive breeding. Harnessing variation in wild crop relatives is necessary to expand the breadth of agronomically valuable traits. Using RAD sequencing, we examine the natural diversity of wild American oil palm populations (Elaeis oleifera), a sister species of the cultivated Elaeis guineensis oil palm. Read More

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Fixation of allelic gene expression landscapes and expression bias pattern shape the transcriptome of the clonal Amazon molly.

Genome Res 2021 Mar 5;31(3):372-379. Epub 2021 Feb 5.

Xiphophorus Genetic Stock Center, Department of Chemistry and Biochemistry, Texas State University, San Marcos, Texas 78666, USA.

The Amazon molly is a unique clonal fish species that originated from an interspecies hybrid between species and It reproduces by gynogenesis, which eliminates paternal genomic contribution to offspring. An earlier study showed that Amazon molly shows biallelic expression for a large portion of the genome, leading to two main questions: (1) Are the allelic expression patterns from the initial hybridization event stabilized or changed during establishment of the asexual species and its further evolution? (2) Is allelic expression biased toward one parental allele a stochastic or adaptive process? To answer these questions, the allelic expression of siblings was assessed to investigate intra- and inter-cohort allelic expression variability. For comparison, interspecies hybrids between and were produced in the laboratory to represent the ancestor. Read More

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Evolution and biogeographic history of the Saguinus mystax group (Primates, Callithrichidae).

Am J Primatol 2021 02 25;83(2):e23226. Epub 2021 Jan 25.

Departamento de Zoologia, Laboratório de Evolução de Mamíferos, Instituto de Ciências Biológicas, Universidade Federal de Minas Gerais, Belo Horizonte, Minas Gerais, Brazil.

The Saguinus mystax group traditionally includes three species, S. mystax, S. labiatus, and S. Read More

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February 2021

Competition indices after reduced impact logging in the Brazilian Amazon.

J Environ Manage 2021 Mar 9;281:111898. Epub 2021 Jan 9.

Federal University of Espirito Santo (UFES), Jerônimo Monteiro, ES, 29550-000, Brazil. Electronic address:

Competition for resources can affect growth and increase mortality in forest stands. The effects of this process are little known, especially in areas subjected to forest management which show distinct growth dynamics when compared to unmanaged natural areas. This study aimed to estimate, evaluate and select the best fit competition indices (CI) for individual trees in a managed forest in the eastern Amazon. Read More

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First report of natural infection by Trypanosoma cruzi in secretions of the scent glands and myocardium of Philander opossum (Marsupialia: Didelphidae): Parasitological and clinicopathological findings.

Vet Parasitol Reg Stud Reports 2020 12 8;22:100463. Epub 2020 Sep 8.

Laboratory of Animal Parasitology, Graduate Program in Animal Health in the Amazon, Institute of Veterinary Medicine, Federal University of Pará, Castanhal, Pará, Brazil. Electronic address:

Trypanosoma cruzi is the etiologic agent of American trypanosomiasis and can infect humans and different species of domestic and wild animals. The marsupials are important wild reservoirs of T. cruzi, aiding in the maintenance of this agent in sylvatic and peri-domestic environments. Read More

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December 2020

Three new species of frogs of the genus (Anura, Strabomantidae) with a redefinition of the species group.

Zookeys 2020 16;993:121-155. Epub 2020 Nov 16.

Museo de Zoología, Escuela de Biología, Pontificia Universidad Católica del Ecuador, Av. 12 de Octubre y Roca, Aptdo. 17-01-2184, Quito, Ecuador Pontificia Universidad Católica del Ecuador Quito Ecuador.

A new phylogeny for the species group is presented, its species content reviewed, and three new species described from the eastern slopes of the Ecuadorian Andes. Our phylogeny includes, for the first time, samples of , , and . The morphology of hyperdistal subarticular tubercles is also assessed among 21 species of . Read More

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November 2020

Biogeography of (Malpighiaceae) and a Meta-Analysis of Vascular Plant Lineages Diversified in the Brazilian Atlantic Rainforests Point to the Late Eocene Origins of This Megadiverse Biome.

Plants (Basel) 2020 Nov 13;9(11). Epub 2020 Nov 13.

Departamento de Ciências Biológicas, Universidade Estadual de Feira de Santana, Molecular Biology of Plants and Fungi Lab (LAMOL), Av. Transnordestina s/n, Novo Horizonte, Feira de Santana 44036-900, Bahia, Brazil.

We investigated the biogeography of , the second-largest lianescent genus of Malpighiaceae, as a model genus to reconstruct the age and biogeographic history of the Brazilian Atlantic Rainforest (BAF). Few studies to date have focused on the tertiary diversification of plant lineages in the BAFs, especially on . Phylogenetic relationships for 24 species of (18 ssp. Read More

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November 2020

The Origins of Coca: Museum Genomics Reveals Multiple Independent Domestications from Progenitor Erythroxylum gracilipes.

Syst Biol 2021 Jan;70(1):1-13

Department of Biological Sciences, University of Illinois at Chicago, Chicago, IL 60607, USA.

Coca is the natural source of cocaine as well as a sacred and medicinal plant farmed by South American Amerindians and mestizos. The coca crop comprises four closely related varieties classified into two species (Amazonian and Huánuco varieties within Erythroxylum coca Lam., and Colombian and Trujillo varieties within Erythroxylum novogranatense (D. Read More

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January 2021

Molecular evolution pattern of Merkel cell polyomavirus identified by viral metagenomics in plasma of high-risk blood donors from the Brazilian Amazon.

Infect Genet Evol 2020 11 22;85:104563. Epub 2020 Sep 22.

Regional Blood Center of Ribeirão Preto, Faculty of Medicine of Ribeirão Preto, University of São Paulo, 14051-140 Ribeirão Preto, São Paulo, Brazil. Electronic address:

Merkel cell polyomavirus (MCPyV) is a common human skin pathogen, shows high seroprevalence and is considered the etiologic agent of Merkel cell carcinoma. However, studies which detect MCPyV DNA in blood products may reveal the importance of this virus for the transfusion medicine. In this study we analyzed by viral metagenomics 36 plasma samples obtained from blood donors positive for the common blood transmitted infections from the city of Macapá (Brazilian Amazon). Read More

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November 2020

Evaluation of metal contamination effects in piranhas through biomonitoring and multi biomarkers approach.

Heliyon 2020 Aug 19;6(8):e04666. Epub 2020 Aug 19.

Laboratory of Cellular Ultrastructure and Immunohistochemistry, Institute of Biological Sciences, Federal University of Pará (UFPA), Belém, Pará, Brazil.

The present field study aimed to assess the water quality of the Itacaiúnas River, located at the eastern part of the Brazilian Amazon, using water's physicochemical parameters, ecological risk assessment in sediments, biomarkers and metal bioaccumulation in piranhas at two points: upstream (P1) and downstream (P2), and the type of season (Dry and Rainy). We revealed a significant difference between the points and the seasons. Concerning, the concentration of metals (Cd, Cu, Zn, Cr, and Hg) in sediment and water, we reported significant concentrations of Cd and Cu especially on P2 at dry season. Read More

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Neotropical Melyroidea group cockroaches reveal various degrees of (eu)sociality.

Naturwissenschaften 2020 Sep 1;107(5):39. Epub 2020 Sep 1.

Institute of Zoology SAS, Dúbravská cesta 9, 845 06, Bratislava, Slovakia.

Eusociality in its various degrees represents an animal social system characterised by cooperative brood care, differentiation into castes and generational overlap. The fossil record indicates that eusociality is likely to have originated in hymenopterans and blattodeans during the Cretaceous. In this study, we present findings from surveys in Peruvian (Villa Carmen) and Ecuadorian (Rio Bigal, El Reventador) cloud forests revealing the first extant cockroach species living in complex, structured groups (n = 90-200 individuals, ˃ 20 adults). Read More

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September 2020

The History of Cacao and Its Diseases in the Americas.

Phytopathology 2020 Oct 14;110(10):1604-1619. Epub 2020 Sep 14.

Department of Botany and Plant Pathology, Purdue University, West Lafayette, IN 47907, U.S.A.

Cacao is a commodity crop from the tropics cultivated by about 6 million smallholder farmers. The tree, , originated in the Upper Amazon where it was domesticated ca. 5450 to 5300 B. Read More

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October 2020

Historical biogeography of Vochysiaceae reveals an unexpected perspective of plant evolution in the Neotropics.

Am J Bot 2020 07 9;107(7):1004-1020. Epub 2020 Jul 9.

Department of Integrative Biology, The University of Texas at Austin, 2415 Speedway no. C0930, Austin, Texas, 78712, USA.

Premise: Despite the fast pace of exploration of the patterns and processes influencing Neotropical plant hyperdiversity, the taxa explored are mostly from large groups that are widely distributed, morphologically diverse, or economically important. Vochysiaceae is an example of an undersampled taxon, providing an excellent system for investigating Neotropical biogeography. We present a phylogenomics-based hypothesis of species relationships in Vochysiaceae to investigate its evolutionary history through space and time. Read More

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Are you more than the sum of your parents' genes? Phenotypic plasticity in a clonal vertebrate and F1 hybrids of its parental species.

Evolution 2020 06 19;74(6):1124-1141. Epub 2020 May 19.

Department of Biological Sciences, Florida State University, Tallahassee, Florida, 32306.

All known vertebrate clones have originated from hybridization events and some have produced distinct evolutionary lineages via hybrid speciation. Amazon mollies (Poecilia formosa) present an excellent study system to investigate how clonal species have adapted to heterogeneous environments because they are the product of a single hybridization event between male sailfin mollies (Poecilia latipinna) and female Atlantic mollies (Poecilia mexicana). Here, we ask whether the hybrid species differs from the combination of its parental species' genes in its plastic response to different environments. Read More

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Archaeological expansions in tropical South America during the late Holocene: Assessing the role of demic diffusion.

PLoS One 2020 27;15(4):e0232367. Epub 2020 Apr 27.

Department of Humanities, Culture and Socio-Ecological Dynamics group (CaSEs), Universitat Pompeu Fabra, Barcelona, Spain.

Human expansions motivated by the spread of farming are one of the most important processes that shaped cultural geographies during the Holocene. The best known example of this phenomenon is the Neolithic expansion in Europe, but parallels in other parts of the globe have recently come into focus. Here, we examine the expansion of four archaeological cultures of widespread distribution in lowland South America, most of which originated in or around the Amazon basin and spread during the late Holocene with the practice of tropical forest agriculture. Read More

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First report of scorpionism caused by Tityus serrulatus, described by Lutz and Mello, 1922 (Scorpiones, Buthidae), a species non-native to the state of Pará, Brazilian Amazon.

Rev Soc Bras Med Trop 2020 16;53:e20190285. Epub 2020 Mar 16.

Universidade Federal do Pará, Hospital Universitário João de Barros Barreto, Centro de Ciências da Saúde, Belém, PA, Brasil.

This reports a case of scorpionism caused by Tityus serrulatus. A male adult was stung while unloading bananas at the supply center in Belém, Pará, Brazil. The bananas originated in another state (Bahia) and were brought to Belém by truck. Read More

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Genomic insight into the origins and dispersal of the Brazilian coastal natives.

Proc Natl Acad Sci U S A 2020 02 13;117(5):2372-2377. Epub 2020 Jan 13.

Departamento de Genética e Biologia Evolutiva, Instituto de Biociências, Universidade de São Paulo, São Paulo, SP, Brazil 05508-090;

In the 15th century, ∼900,000 Native Americans, mostly Tupí speakers, lived on the Brazilian coast. By the end of the 18th century, the coastal native populations were declared extinct. The Tupí arrived on the east coast after leaving the Amazonian basin ∼2,000 y before present; however, there is no consensus on how this migration occurred: toward the northern Amazon and then directly to the Atlantic coast, or heading south into the continent and then migrating to the coast. Read More

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February 2020

Chromosomal dynamics in space and time: evolutionary history of Mycetophylax ants across past climatic changes in the Brazilian Atlantic coast.

Sci Rep 2019 12 11;9(1):18800. Epub 2019 Dec 11.

Departamento de Genética, Universidade Federal do Paraná (UFPR), Curitiba, PR, Brazil.

Fungus-farming ants of the genus Mycetophylax exhibit intra and interspecific chromosome variability, which makes them suitable for testing hypotheses about possible chromosomal rearrangements that endure lineage diversification. We combined cytogenetic and molecular data from Mycetophylax populations from coastal environments to trace the evolutionary history of the clade in light of chromosomal changes under a historical and geographic context. Our cytogenetic analyses revealed chromosomal differences within and among species. Read More

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December 2019

: How an Amazonian parasite became an Inuit health issue.

Can Commun Dis Rep 2019 Jul 4;45(7-8):183-190. Epub 2019 Jul 4.

Bureau of Microbial Hazards, Food Directorate, Health Canada, Ottawa, ON.

is a protozoan parasite that originated in the Amazon. Felids (mammals in the cat family) are the only definitive hosts. These animals shed large numbers of infectious oocysts into the environment, which can subsequently infect many intermediate hosts, including birds, mammals and, possibly, fish. Read More

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The Amazon River: A Major Source of Organic Plastic Additives to the Tropical North Atlantic?

Environ Sci Technol 2019 07 18;53(13):7513-7521. Epub 2019 Jun 18.

Aix-Marseille Univ., Toulon Univ., CNRS, IRD, Mediterranean Institute of Oceanography (MIO) , Marseille 13288 , France.

The release of emerging organic contaminants is identified among the most critical hazards to the marine environment, and plastic additives have received growing attention due to their worldwide distribution and potential deleterious effects. Here, we report dissolved surface water concentrations of two important families of plastic additives (organophosphate esters (OPEs) and bisphenols) and other related organic compounds (perfluorinated chemicals) measured in the North Atlantic from Cape Verde to the West Indies. We found that OPEs were the most abundant contaminants, reaching remarkably high concentrations in open ocean waters (1200 km offshore of the American Coast, at the location of the Amazon river plume during the sampling period), with up to 1. Read More

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The plastomes of Astrocaryum aculeatum G. Mey. and A. murumuru Mart. show a flip-flop recombination between two short inverted repeats.

Planta 2019 Oct 20;250(4):1229-1246. Epub 2019 Jun 20.

Laboratório de Fisiologia Molecular de Plantas, Departamento de Biologia Vegetal, Universidade Federal de Viçosa, Viçosa, MG, Brazil.

Main Conclusion: The plastomes of Astrocaryum murumuru and A. aculeatum revealed a lineage-specific structural feature originated by flip-flop recombination, non-synonymous substitutions in conserved genes and several molecular markers. Astrocaryum murumuru Mart. Read More

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October 2019

Seed size evolution and biogeography of Plukenetia (Euphorbiaceae), a pantropical genus with traditionally cultivated oilseed species.

BMC Evol Biol 2019 01 22;19(1):29. Epub 2019 Jan 22.

Department of Biology, University of Ottawa, Gendron Hall, Room 160, 30 Marie Curie, Ottawa, Ontario, K1N 6N5, Canada.

Background: Plukenetia is a small pantropical genus of lianas and vines with variably sized edible oil-rich seeds that presents an ideal system to investigate neotropical and pantropical diversification patterns and seed size evolution. We assessed the biogeography and seed evolution of Plukenetia through phylogenetic analyses of a 5069 character molecular dataset comprising five nuclear and two plastid markers for 86 terminals in subtribe Plukenetiinae (representing 20 of ~ 23 Plukenetia species). Two nuclear genes, KEA1 and TEB, were used for phylogenetic reconstruction for the first time. Read More

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January 2019

Genetic structure and diversity in Brazilian populations of Anastrepha obliqua (Diptera: Tephritidae).

PLoS One 2018 20;13(12):e0208997. Epub 2018 Dec 20.

Departamento de Ciências Biológicas, Universidade Estadual de Santa Cruz. Ilhéus, Bahia, Brazil.

Anastrepha obliqua (Macquart), the West Indian fruit fly, is one of the most economically important pest species in the Neotropical region. It infests an extensive range of host plants that include over 60 species. The geographic range of A. Read More

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