28,727 results match your criteria morphological genetic


Systematics of Crepidostomum species from the Russian Far East and northern Japan, with description of a new species and validation of the genus Stephanophiala.

Parasitol Int 2021 Jun 21:102412. Epub 2021 Jun 21.

Department of Ecosystem Studies, School of Environmental Science, The University of Shiga Prefecture, Shiga 522-8533, Japan.

Current article touched upon the issue of the complicated taxonomic status of some species from the genus Crepidostomum collected from the freshwater fish in the rivers of Primorsky region, Sakhalin, and Hokkaido Islands. Primary morphological analyses showed affiliation of the worms to the species C. farionis (Müller, 1784) Lühe, 1909; C. Read More

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Molecular and morphological systematics of a new, reef forming, cupped oyster from the northern Arabian Gulf: new species.

Zookeys 2021 10;1043:1-20. Epub 2021 Jun 10.

Department of Health, Life & Environmental Sciences - University of L'Aquila,Via Vetoio snc, 67100, L'Aquila-Coppito, Italy University of L'Aquila L'Aquila Italy.

The rocky northern shores of Kuwait and those of the western, inner shores of Kuwait Bay are dominated by a small, densely encrusting oyster. The identity of this oyster has never been confirmed and was mistaken previously for a small . The shell morphology suggests that this species belongs to the subfamily Crassostreinae, but within that subfamily, the presence of marginal erect trumpet-shaped projections is so far unique. Read More

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Large-duct pattern invasive adenocarcinoma of the pancreas-a variant mimicking pancreatic cystic neoplasms: A minireview.

World J Gastroenterol 2021 Jun;27(23):3262-3278

Division of Gastroenterology and Hematology/Oncology, Department of Medicine, Asahikawa Medical University, Asahikawa 0788510, Hokkaido, Japan.

Pancreatic cancer currently has no subtypes that inform clinical decisions; hence, there exists an opportunity to rearrange the morphological and molecular taxonomy that guides a better understanding of tumor characteristics. Nonetheless, accumulating studies to date have revealed the large-duct type variant, a unique subtype of pancreatic ductal adenocarcinoma (PDA) with cystic features. This subtype often radiographically mimics intraductal papillary mucinous neoplasms (IPMNs) and involves multiple small cysts occasionally associated with solid masses. Read More

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Seasonal changes in recombination characteristics in a natural population of Drosophila melanogaster.

Heredity (Edinb) 2021 Jun 23. Epub 2021 Jun 23.

Institute of Evolution, University of Haifa, Haifa, Israel.

Environmental seasonality is a potent evolutionary force, capable of maintaining polymorphism, promoting phenotypic plasticity and causing bet-hedging. In Drosophila, environmental seasonality has been reported to affect life-history traits, tolerance to abiotic stressors and immunity. Oscillations in frequencies of alleles underlying fitness-related traits were also documented alongside SNPs across the genome. Read More

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Integrative taxonomy: combining molecular and morphological characteristics to identify Lymnaea (Galba) cubensis, intermediate host of Fasciola hepatica.

Rev Bras Parasitol Vet 2021 21;30(2):e026320. Epub 2021 Jun 21.

Laboratório de Helmintologia Veterinária, Departamento de Parasitologia, Universidade Federal de Minas Gerais - UFMG, Belo Horizonte, MG, Brasil.

Despite the epidemiological importance of the Lymnaeidae family regarding transmission of Fasciola hepatica, knowledge about the diversity and distribution of these molluscs and the role of each species in the expansion of fasciolosis remains sparse. Classical morphological (n=10) identification was performed in lymneids from Lagoa Santa, a municipality in the state of Minas Gerais, Brazil, along with molecular and phylogenetic analysis (n=05) based on the partial nucleotide sequences of the mitochondrial cytochrome c oxidase subunit I gene (COI mtDNA) and ribosomal internal transcribed spacer II (ITS-2 rDNA). The shell morphology made it possible to distinguish the lymneids of Lagoa Santa from Pseudosuccinea columella. Read More

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Cryptic species and grey zone speciation of the Barbodes binotatus complex (Teleostei, Cyprinidae) in Sundaland.

J Fish Biol 2021 Jun 22. Epub 2021 Jun 22.

Department of Agricultural and Food Sciences, Faculty of Science, Universiti Tunku Abdul Rahman, Kampar, Perak, Malaysia.

Morphology-based taxonomy of freshwater fish is effective when there are representative specimens covering large regions. However, in Sundaland where the presence of cryptic species is high, the technique has its limitations. This is compounded by uncritical description of holotypes in olden literature. Read More

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Molecular reassessment of diaporthalean fungi associated with strawberry, including the leaf blight fungus, Paraphomopsis obscurans gen. et comb. nov. (Melanconiellaceae).

IMA Fungus 2021 Jun 22;12(1):15. Epub 2021 Jun 22.

Mycology and Nematology Genetic Diversity and Biology Laboratory, United States Department of Agriculture Agricultural Research Service, Beltsville, MD, 20705, USA.

Phytopathogenic fungi in the order Diaporthales (Sordariomycetes) cause diseases on numerous economically important crops worldwide. In this study, we reassessed the diaporthalean species associated with prominent diseases of strawberry, namely leaf blight, leaf blotch, root rot and petiole blight, based on molecular data and morphological characters using fresh and herbarium collections. Combined analyses of four nuclear loci, 28S ribosomal DNA/large subunit rDNA (LSU), ribosomal internal transcribed spacers 1 and 2 with 5. Read More

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mediates species-, sex-, environment- and trait-specific exaggeration of size and shape.

Proc Biol Sci 2021 Jun 23;288(1953):20210241. Epub 2021 Jun 23.

Department of Biology, Indiana University, 915 East Third Street, 102 Myers Hall, Bloomington, IN 47405, USA.

Context-dependent trait exaggeration is a major contributor to phenotypic diversity. However, the genetic modifiers instructing development across multiple contexts remain largely unknown. We use the arthropod tibia, a hotspot for segmental differentiation, as a paradigm to assess the developmental mechanisms underlying the context-dependent structural exaggeration of size and shape through nutritional plasticity, sexual dimorphism and segmental differentiation. Read More

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TUMORS AND TUMOR-LIKE LESIONS OF THE SALIVARY GLANDS: MORPHOLOGICAL CHARACTERISTICS OF THE SURGICAL MATERIAL.

Wiad Lek 2021 ;74(4):929-933

TARAS SHEVCHENKO NATIONAL UNIVERSITY OF KYIV, KYIV, UKRAINE.

Objective: The aim is to give a morphological characteristic of tumors and tumor-like lesions of the salivary glands in the course of a comprehensive analysis of the surgical material.

Patients And Methods: Materials and methods: The study used surgical material from 67 patients with various pathologies of the salivary glands. The patients were treated at Kyiv City Clinical Hospital No. Read More

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Adipsin promotes bone marrow adiposity by priming mesenchymal stem cells.

Elife 2021 Jun 22;10. Epub 2021 Jun 22.

Naomi Berrie Diabetes Cente, Columbia University, New York, United States.

Background: Marrow adipose tissue (MAT) has been shown to be vital for regulating metabolism and maintaining skeletal homeostasis in the bone marrow (BM) niche. As a reflection of BM remodeling, MAT is highly responsive to nutrient fluctuations, hormonal changes, and metabolic disturbances such as obesity and diabetes mellitus. Expansion of MAT has also been strongly associated with bone loss in mice and humans. Read More

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Characterization of contrasting rice (Oryza sativa L.) genotypes reveals the Pi-efficient schema for phosphate starvation tolerance.

BMC Plant Biol 2021 Jun 21;21(1):282. Epub 2021 Jun 21.

Indian Council of Agricultural Research, New Delhi, India.

Background: Phosphorus (P), being one of the essential components of nucleic acids, cell membranes and enzymes, indispensable for diverse cellular processes like photosynthesis/carbohydrate metabolism, energy production, redox homeostasis and signaling. Crop yield is severely affected due to Phosphate (Pi) deficiency; and to cope with Pi-deficiency, plants have evolved several strategies. Some rice genotypes are compatible with low Pi availability, whereas others are sensitive to Pi deficiency. Read More

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Inhibitory Concentrations of Ciprofloxacin Induce an Adaptive Response Promoting the Intracellular Survival of Salmonella enterica Serovar Typhimurium.

mBio 2021 Jun 22:e0109321. Epub 2021 Jun 22.

Department of Medicine, University of Cambridge School of Clinical Medicine, Cambridge, United Kingdom.

Antimicrobial resistance (AMR) is a pressing global health crisis, which has been fueled by the sustained use of certain classes of antimicrobials, including fluoroquinolones. While the genetic mutations responsible for decreased fluoroquinolone (ciprofloxacin) susceptibility are known, the implications of ciprofloxacin exposure on bacterial growth, survival, and interactions with host cells are not well described. Aiming to understand the influence of inhibitory concentrations of ciprofloxacin we subjected three clinical isolates of Salmonella enterica serovar Typhimurium to differing concentrations of ciprofloxacin, dependent on their MICs, and assessed the impact on bacterial growth, morphology, and transcription. Read More

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Comparison of matK and rbcL DNA barcodes for genetic classification of jewel orchid accessions in Vietnam.

J Genet Eng Biotechnol 2021 Jun 21;19(1):93. Epub 2021 Jun 21.

Plant Mutation Breeding Division, Centre for Isotopes and Radiation Application, National Nuclear Energy Agency, Jl. Lebakbulus Raya No. 49, South Jakarta, Indonesia.

Background: Jewel orchid is the common name of several orchid species which can be alike in morphological characteristics, but variable in medicinal properties. At present, two DNA barcode loci, namely, maturase K (matK) and ribulose 1,5-biphosphate carboxylase (rbcL), are intensively utilized for plant identification. However, the discrimination effectiveness of these loci is variable among plant species. Read More

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Morphological and molecular description of Allocreadium apokryfi sp. n. (Digenea: Allocreadiidae) from native Labeobarbus aeneus (Cyprinidae) in South Africa, including notes on its biology, evolutionary history and an updated key of African Allocreadium.

Folia Parasitol (Praha) 2021 May 25;68. Epub 2021 May 25.

Department of Zoology, University of Johannesburg, Johannesburg, South Africa.

Adult trematodes of Allocreadium Looss, 1900 (Digenea) infect the intestine of mostly freshwater fishes in Asia, Europe, Africa and the Americas. During routine parasitological surveys in the Vaal River system, adult trematodes were collected from the intestine of smallmouth yellowfish, Labeobarbus aeneus (Burchell). The trematodes were confirmed to represent a member of Allocreadium and did not match any existing taxon. Read More

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Electron microscopy reveals unexpected cytoplasm and envelope changes during thymineless death in .

J Bacteriol 2021 Jun 21:JB0015021. Epub 2021 Jun 21.

Department of Microbiology, University of Illinois at Urbana-Champaign, Urbana, IL 61801, USA.

Bacterial rod-shaped cells experiencing irreparable chromosome damage should filament without other morphological changes. Thymineless death (TLD) strikes thymidine auxotrophs denied external thymine/thymidine (T) supplementation. Such T-starved cells cannot produce the DNA precursor dTTP and therefore stop DNA replication. Read More

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The gene as a modulator of division of labour in social insects.

J Neurogenet 2021 Jun 20:1-11. Epub 2021 Jun 20.

Department of Biology, Washington University in St. Louis, St. Louis, MO, USA.

The social ants, bees, wasps, and termites include some of the most ecologically-successful groups of animal species. Their dominance in most terrestrial environments is attributed to their social lifestyle, which enable their colonies to exploit environmental resources with remarkable efficiency. One key attribute of social insect colonies is the division of labour that emerges among the sterile workers, which represent the majority of colony members. Read More

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Triterpenic and phenolic acids production changed in Salvia officinalis via in vitro and in vivo polyploidization: A consequence of altered genes expression.

Phytochemistry 2021 Jun 16;189:112803. Epub 2021 Jun 16.

Department of Horticultural Science, Faculty of Agriculture, Bu Ali Sina University, 65174, Hamedan, Iran. Electronic address:

The induction of polyploidy is an efficient technique for creating a diversity of genetic, phenotypic, and phytochemical novelties in plant taxa. Sage (Salvia officinalis L.) is a well-known medicinal plant rich of valuable bioactive molecules such as triterpenic and phenolic acids. Read More

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Phenotypic characterization of exotic tomato germplasm: An excellent breeding resource.

PLoS One 2021 18;16(6):e0253557. Epub 2021 Jun 18.

Department of Plant Breeding and Genetics, University of Agriculture, Faisalabad, Pakistan.

Tomato production in Pakistan faces significant problems of low yields due to various biotic and abiotic stresses primarily because of a narrow genetic base of the cultivars being used. Therefore, Introduction and evaluation of the exotic tomato germplasm has become necessary to acquire elite material to develop future breeding programs. To this end, the present study was conducted for the phenotypic characterization of twenty exotic tomato genotypes along with two locally grown cultivars in semi-arid subtropical climate. Read More

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First record of the invasive mosquito species Aedes koreicus (Diptera, Culicidae) in the Republic of Kazakhstan.

Parasite 2021 18;28:52. Epub 2021 Jun 18.

Tomsk State University, Lenin Street 36, 634050 Tomsk, Russia.

The natural distribution range of Aedes koreicus is Korea, China, Japan, and the Russian Far East. Since 2008, this species has been recorded as an invasive species in some European countries (Belgium, European Russia, Germany, Hungary, Italy, Slovenia, and Switzerland). The invasive mosquito species Ae. Read More

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Automated capture-based NGS workflow: one thousand patients experience in a clinical routine framework.

Diagnosis (Berl) 2021 Jun 16. Epub 2021 Jun 16.

Department of Laboratory Medicine and Pathology, Diagnostic Hematology and Clinical Genomics Unit, Modena University Hospital, Modena, Italy.

Objectives: The Next Generation Sequencing (NGS) based mutational study of hereditary cancer genes is crucial to design tailored prevention strategies in subjects with different hereditary cancer risk. The ease of amplicon-based NGS library construction protocols contrasts with the greater uniformity of enrichment provided by capture-based protocols and so with greater chances for detecting larger genomic rearrangements and copy-number variations. Capture-based protocols, however, are characterized by a higher level of complexity of sample handling, extremely susceptible to human bias. Read More

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A case report of successful complex percutaneous coronary intervention for acute coronary syndrome in a paediatric patient with familial hypercholesterolaemia.

Eur Heart J Case Rep 2021 Jun 16;5(6):ytab175. Epub 2021 Jun 16.

Department of Cardiology, Lokmanya Tilak Municipal Medical College and General Hospital (LTMGH), Dr Babasaheb Ambedkar Road, Sion (West), Mumbai 400022, India.

Background: Familial hypercholesterolaemia (FH) is a primary genetic dyslipidaemia characterized by elevation in serum low-density lipoprotein cholesterol and its deposition in systemic arteries, which causes premature atherosclerosis.

Case Summary: A 10-year-old girl presented with severe symptomatic coronary artery disease. She demonstrated characteristic morphological features of FH. Read More

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Prickle morphogenesis in rose is coupled with secondary metabolite accumulation and governed by canonical MBW transcriptional complex.

Plant Direct 2021 Jun 15;5(6):e00325. Epub 2021 Jun 15.

Division of Biotechnology CSIR-Institute of Himalayan Bioresource Technology Palampur India.

Rose is an economically important flowering plant that holds an essential place in cut flower, medicinal, and aromatic industries. The presence of prickles, epidermal outgrowths resembling trichomes, on rose is highly undesirable as these make harvesting and transportation difficult. Attempts were made for generating rose varieties lacking prickles via breeding and natural selections; however, these approaches obtained only chimeric and genetically unstable prickle-less mutants. Read More

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Labbé, 1896 (Alveolata: Apicomplexa) in frogs: Description of a new species and proposing a new subfamily to accommodate these enigmatic parasites.

Int J Parasitol Parasites Wildl 2021 Aug 28;15:199-207. Epub 2021 May 28.

Emeritus Professor of Biology, 76 Homesteads Road, Placitas, New Mexico, 87043, USA.

 Labbé ,1896 (Alveolata: Apicomplexa) is a monotypic genus of renal coccidia found in anurans, particularly in the edible frog kl. (Amphibia: Anura: Ranidae), distributed in different parts of Europe. Here we propose a new species from the Tokyo daruma pond frog, . Read More

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Population genetic structure of sharpbelly (Basilesky, 1855) and morphological diversification along climate gradients in China.

Ecol Evol 2021 Jun 1;11(11):6798-6813. Epub 2021 May 1.

College of Animal Science and Technology Northwest A&F University Yangling China.

Sharpbelly (Basilewski, 1855) is a small, widespread, and native cyprinid fish with prominent habitat suitability and high invasive potential and is becoming the dominant species in freshwater ecosystems under intensified environmental disturbances. But how acclimates to extremely heterogeneous environments remains unclear. In current study, the genetic structure of was analyzed using Bayesian phylogenetic inference, haplotype network, and STRUCTURE base on gene across 18 populations spanning 20 degrees of latitude and 18 degrees of longitude in China. Read More

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Demographic and ecogeographic factors limit wild grapevine spread at the southern edge of its distribution range.

Ecol Evol 2021 Jun 8;11(11):6657-6671. Epub 2021 May 8.

Department of Chemical Engineering Ariel University Ariel Israel.

The spatial distribution of plants is constrained by demographic and ecogeographic factors that determine the range and abundance of the species. Wild grapevine ( ssp. ) is distributed from Switzerland in the north to Israel in the south. Read More

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Taxonomic Revision and Evolutionary Phylogeography of Dusky Langur () in Peninsular Malaysia.

Zool Stud 2020 30;59:e64. Epub 2020 Nov 30.

Department of Biological Sciences and Biotechnology, Faculty of Science and Technology, Universiti Kebangsaan Malaysia, 43600 Bangi, Selangor, Malaysia. E-mail: (Md-Zain); (Aifat).

Dusky langur, , inhabits tropical rainforests in Peninsular Malaysia, Thailand, and Myanmar. Morphologically, five subspecies are distributed in Peninsular Malaysia, but few studies have used genetic data to verify the classification. It is difficult to differentiate subspecies based on morphological characteristics, so this study used molecular data to differentiate subspecies of . Read More

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November 2020

Response thresholds alone cannot explain empirical patterns of division of labor in social insects.

PLoS Biol 2021 Jun 17;19(6):e3001269. Epub 2021 Jun 17.

Laboratory of Social Evolution and Behavior, The Rockefeller University, New York, New York, United States of America.

The effects of heterogeneity in group composition remain a major hurdle to our understanding of collective behavior across disciplines. In social insects, division of labor (DOL) is an emergent, colony-level trait thought to depend on colony composition. Theoretically, behavioral response threshold models have most commonly been employed to investigate the impact of heterogeneity on DOL. Read More

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Taxonomic reassessment and phylogenetic placement of (Reptilia, Gekkonidae) based on morphological and molecular evidence.

Zookeys 2021 28;1040:91-121. Epub 2021 May 28.

Department of Zoology, Faculty of Science, Kasetsart University, Bangkok, 10900, Thailand Kasetsart University Bangkok Thailand.

The taxonomy and phylogeny of the complex along the Thai-Malay Peninsular region has been the focus of many recent studies and has resulted in the recognition of 17 species. However, the majority of these studies were focused on Peninsular and insular Malaysia where there were specimens and genetic vouchers. The taxonomic status and phylogenetic relationships of the Thai species in this complex remain unresolved, due to the lack of genetic material of some species, especially and from Thai populations. Read More

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Delimiting cryptic species within the brown-banded bamboo shark, Chiloscyllium punctatum in the Indo-Australian region with mitochondrial DNA and genome-wide SNP approaches.

BMC Ecol Evol 2021 06 16;21(1):121. Epub 2021 Jun 16.

School of Biomedical Sciences, The University of Queensland, Brisbane, QLD, 4072, Australia.

Background: Delimiting cryptic species in elasmobranchs is a major challenge in modern taxonomy due the lack of available phenotypic features. Employing stand-alone genetics in splitting a cryptic species may prove problematic for further studies and for implementing conservation management. In this study, we examined mitochondrial DNA and genome-wide nuclear single nucleotide polymorphisms (SNPs) in the brown-banded bambooshark, Chiloscyllium punctatum to evaluate potential cryptic species and the species-population boundary in the group. Read More

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