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Relevant bibliographies by topics / Hydra vulgaris

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Academic literature on the topic 'Hydra vulgaris'

Author: Grafiati

Published: 4 June 2021

Last updated: 4 February 2022

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Journal articles on the topic "Hydra vulgaris"

1

Hamada, Mayuko, Noriyuki Satoh, and Konstantin Khalturin. "A Reference Genome from the Symbiotic Hydrozoan, Hydra viridissima." G3: Genes|Genomes|Genetics 10, no. 11 (September 8, 2020): 3883–95. http://dx.doi.org/10.1534/g3.120.401411.

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Various Hydra species have been employed as model organisms since the 18th century. Introduction of transgenic and knock-down technologies made them ideal experimental systems for studying cellular and molecular mechanisms involved in regeneration, body-axis formation, senescence, symbiosis, and holobiosis. In order to provide an important reference for genetic studies, the Hydra magnipapillata genome (species name has been changed to H. vulgaris) was sequenced a decade ago (Chapman et al., 2010) and the updated genome assembly, Hydra 2.0, was made available by the National Human Genome Research Institute in 2017. While H. vulgaris belongs to the non-symbiotic brown hydra lineage, the green hydra, Hydra viridissima, harbors algal symbionts and belongs to an early diverging clade that separated from the common ancestor of brown and green hydra lineages at least 100 million years ago (Schwentner and Bosch 2015; Khalturin et al., 2019). While interspecific interactions between H. viridissima and endosymbiotic unicellular green algae of the genus Chlorella have been a subject of interest for decades, genomic information about green hydras was nonexistent. Here we report a draft 280-Mbp genome assembly for Hydra viridissima strain A99, with a scaffold N50 of 1.1 Mbp. The H. viridissima genome contains an estimated 21,476 protein-coding genes. Comparative analysis of Pfam domains and orthologous proteins highlights characteristic features of H. viridissima, such as diversification of innate immunity genes that are important for host-symbiont interactions. Thus, the H. viridissima assembly provides an important hydrozoan genome reference that will facilitate symbiosis research and better comparisons of metazoan genome architectures.

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Deserti, Maria I., and Mauricio O. Zamponi. "Biometric and statistical investigations on the cnidoma of the genus Hydra (Cnidaria, Hydrozoa)." Iheringia. Série Zoologia 102, no. 3 (September 2012): 298–302. http://dx.doi.org/10.1590/s0073-47212012000300008.

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This paper deals about the nematocysts like a source of biometric information for comparison between the species Hydra vulgaris Pallas, 1766, Hydra vulgaris pedunculata Deserti et al., 2011 and Hydra pseudoligactis (Hyman, 1931). This biometric tool lets us carry out statistical comparisons and adding these results to the identification of specimens from different classificatory groups. In this particular study, we obtained significant differences between species, individuals of each species and nematocysts type when compared the biometry of its nematocysts. Another result was the variation in of particular nematocysts, like atrichous isorhiza and holotrichous isorhiza for the species H. vulgaris in relation to the column size.

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Sarras, Michael P., Xiaoming Zhang, Jacquelyn K. Huff, Mary Ann Accavitti, P. L. St. John, and Dale R. Abrahamson. "Extracellular Matrix (Mesoglea) of Hydra vulgaris." Developmental Biology 157, no. 2 (June 1993): 383–98. http://dx.doi.org/10.1006/dbio.1993.1143.

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Sarras, Michael P., Michael E. Madden, Xiaoming Zhang, Sripad Gunwar, Jacquelyn K. Huff, and Billy G. Hudson. "Extracellular matrix (mesoglea) of Hydra vulgaris." Developmental Biology 148, no. 2 (December 1991): 481–94. http://dx.doi.org/10.1016/0012-1606(91)90266-6.

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Sarras, Michael P., Darrel Meador, and Xiaoming Zhang. "Extracellular matrix (mesoglea) of Hydra vulgaris." Developmental Biology 148, no. 2 (December 1991): 495–500. http://dx.doi.org/10.1016/0012-1606(91)90267-7.

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Schlaepfer, D. D., H. R. Bode, and H. T. Haigler. "Distinct cellular expression pattern of annexins in Hydra vulgaris." Journal of Cell Biology 118, no. 4 (August 15, 1992): 911–28. http://dx.doi.org/10.1083/jcb.118.4.911.

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The annexins are a structurally related family of Ca2+ and phospholipid binding proteins whose function has not been clearly defined. Further investigations of annexin function may be enhanced by studying simpler organisms that express fewer annexin gene products. We previously characterized annexin XII from the freshwater cnidarian Hydra vulgaris (Schlaepfer, D. D., D. A. Fisher, M. E. Brandt, H. R. Bode, J. Jones, and H. T. Haigler. 1992. J. Biol. Chem. 267:9529-9539). In this report, we detected one other hydra annexin (40 kD) by screening hydra cell extracts with antibodies raised against peptides from highly conserved regions of known annexins. The 40-kD protein was expressed at less than 1% of annexin XII levels. These biochemical studies indicate that hydra contain a very limited number of annexin gene products. The cellular hydra annexin distribution was analyzed by indirect immunofluorescence. Using affinity-purified antibodies to annexin XII, the epithelial battery cells were stained throughout the tentacle. A lower level of annexin XII staining was detected in peduncle region epithelial cells. No other cell types showed detectable annexin XII staining. The anti-peptide antibody that specifically detected the 40-kD hydra annexin, maximally stained the cytoplasm of nematocytes. The immunofluorescent results showed that annexin XII and the 40-kD annexin were not co-expressed in the same cells. Since the hydra annexins localized to specific subsets of the total hydra cell types, it is likely that these proteins perform specialized biological roles, and not general "housekeeping" functions which are part of the essential molecular machinery of all cells.

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Dupre, Christophe, and Rafael Yuste. "Non-overlapping Neural Networks in Hydra vulgaris." Current Biology 27, no. 8 (April 2017): 1085–97. http://dx.doi.org/10.1016/j.cub.2017.02.049.

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8

Kuznetsov, Sergey G., Friederike Anton-Erxleben, and Thomas C. G. Bosch. "Epithelial interactions in Hydra: apoptosis in interspecies grafts is induced by detachment from the extracellular matrix." Journal of Experimental Biology 205, no. 24 (December 15, 2002): 3809–17. http://dx.doi.org/10.1242/jeb.205.24.3809.

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SUMMARY Apoptosis plays an important role in immunity and is widely used to eliminate foreign or infected cells. Cnidaria are the most basal eumetazoans and have no specialised immune cells, but some colonial cnidarians possess a genetic system to discriminate between self and non-self. By grafting epithelia of different species we have previously shown that the freshwater polyp Hydra eliminates non-self cells by phagocytosis. Here we have investigated whether apoptosis is involved in the histocompatibility reactions. We studied epithelial interactions between Hydra vulgaris and Hydra oligactis and show that a large number of apoptotic cells accumulate in the contact region of interspecies grafts. Histological analysis of the graft site revealed that displacement of the endodermal layer of Hydra vulgaris by endoderm from Hydra oligactis coincided with impaired cell—cell and cell—matrix contacts. We therefore suggest that in interspecies grafts, apoptosis is induced by the detachment of epithelial cells from the extracellular matrix(anoikis) and not by a discriminative allorecognition system.

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9

Deserti, María I., Karina S. Esquius, Alicia H. Escalante, and Fabián H. Acuña. "Trophic ecology and diet of Hydra vulgaris (Cnidaria; Hydrozoa)." Animal Biology 67, no. 3-4 (2017): 287–300. http://dx.doi.org/10.1163/15707563-00002537.

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Hydra is a genus of common, sessile, solitary freshwater cnidarians, which are defined as carnivorous and efficient predators. The purpose of this study was to obtain information on the feeding habits and diet of Hydra vulgaris collected from its natural habitat in Nahuel Rucá Lake (Buenos Aires Province, Argentina). We found three categories of food items in the coelenteron: algae, fungi, and small invertebrates. Algae dominated the diet in terms of abundance and frequency of occurrence, but their volumetric contribution was almost negligible, as was their possible nutritional value. Invertebrate prey captured, using active predation, represented the major volumetric contribution, with four different taxa found. The detection of phytoplankton in the gastral cavities reveals the input of some organisms present in the surrounding waters in addition to the invertebrates. This information is novel, since studies on the natural diet of Hydra are very scarce.

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Dash, Bhagirathi, and Timothy D. Phillips. "Molecular characterization of a catalase from Hydra vulgaris." Gene 501, no. 2 (June 2012): 144–52. http://dx.doi.org/10.1016/j.gene.2012.04.015.

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Dissertations / Theses on the topic "Hydra vulgaris"

1

Schade, Marsha. "Oogenese in Hydra vulgaris." Diss., lmu, 2008. http://nbn-resolving.de/urn:nbn:de:bvb:19-87249.

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Münder, Sandra Tamara. "Die Rolle des Notch-Signaltransduktionsweges bei Muster- und Grenzbildungsprozessen in Hydra vulgaris." Diss., lmu, 2011. http://nbn-resolving.de/urn:nbn:de:bvb:19-136253.

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3

Sudhop, Stefanie. "Knospung-steuernde Gene in Hydra vulgaris ein evolutionsgeschichtlich alter FGFR kontrolliert die Knospenablösung /." [S.l.] : [s.n.], 2006. http://archiv.ub.uni-marburg.de/diss/z2006/0130.

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Dash, Bhagirathi. "Molecular cloning and characterization of important stress and redox regulatory genes from Hydra vulgaris." Texas A&M University, 2005. http://hdl.handle.net/1969.1/4994.

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In this research, important stress and redox regulatory genes present in Hydra vulgaris were isolated and characterized to facilitate our understanding of the evolution and mechanisms of stress response. H. vulgaris heat shock protein 70 (HvHSP70), extracellular copper zinc superoxide dismutase (HvECCuZnSOD), manganese superoxide dismutase (HvMnSOD), phospholipid peroxidase glutathione peroxidase (HvPHGPx) and monofunctional catalase (HvCatalase) were cloned and characterized with regard to stress response, phylogeny and molecular structure. The HSP70 gene isolated from H. vulgaris encodes a polypeptide of 650 amino acids (Mw=710,037) and is interrupted by three intron sequences. The 5' non-coding region of the HvHSP70 possessed the canonical heat shock elements. Phylogenetically HvHSP70 formed a distinct lineage. A molecular model generated for the N-terminal fragment of the HvHSP70 displayed the heat shock protein fold and domains of phosphotransferases. The EC-CuZnSOD cDNA isolated from H. vulgaris encodes a protein of 189 amino acids (Mw=20959.73); the first 19 amino acids constitute the presumed signal peptide. Phylogenetically HvEC-CuZnSOD is grouped with ECCuZnSODs from several organisms. A molecular model generated for the HvEC-CuZnSOD displayed the CuZnSOD (beta)-barrel fold. The MnSOD cDNA isolated from H. vulgaris encodes a protein of 219 amino acids (Mw=24348.75); the first 21 amino acids constitute the presumed mitochondria-targeting signal peptide. Phylogenetically HvMnSOD is clustered with mollusk and crustacean MnSODs. A molecular model generated for the HvMnSOD displayed the N-terminal long alpha antiparallel hairpin and the Cterminal mixed alpha/beta fold characteristic of MnSODs. The PHGPx gene isolated from H. vulgaris encodes a polypeptide of 168 amino acids (Mw=18746.51) including a TGA-encoded selenocysteine at residue 44 and lacks any intron. Phylogenetically HvPHGPx is grouped with PHGPxs from several organisms. A molecular model generated for the HvPHGPx displayed the thioredoxin fold. The 3'-end of a cDNA sequence encoding for 168 amino acids of the Cterminal end of a catalase was isolated from H. vulgaris. Phylogenetically HvCatalase is grouped with heme-containing monofunctional catalases. Hydrae exposed to thermal, starvation, oxidative and metal stress responded by regulating respective mRNA transcriptions suggesting that these genes are involved in stress and (anti)oxidative processes and may have potential as molecular biomarkers for assessing aquatic environment quality.

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Motamedi, Mina. "Characterization of anti-apoptotic protein family members (Bax inhibitor-1 and Lifeguard) in Hydra vulgaris." Diss., Ludwig-Maximilians-Universität München, 2013. http://nbn-resolving.de/urn:nbn:de:bvb:19-160446.

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Münder, Sandra Tamara [Verfasser], and Angelika [Akademischer Betreuer] Böttger. "Die Rolle des Notch-Signaltransduktionsweges bei Muster- und Grenzbildungsprozessen in Hydra vulgaris / Sandra Tamara Münder. Betreuer: Angelika Böttger." München : Universitätsbibliothek der Ludwig-Maximilians-Universität, 2011. http://d-nb.info/1017233144/34.

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Reichart, Lisa [Verfasser], and Monika [Akademischer Betreuer] Hassel. "Functional analysis of siRNA mediated knockdowns of fibroblast growth factors in Hydra vulgaris / Lisa Reichart ; Betreuer: Monika Hassel." Marburg : Philipps-Universität Marburg, 2021. http://d-nb.info/1226287352/34.

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8

Fowler, Susan J. "Molecular analysis of glucose-induced basement membrane thickening in hydra vulgaris : a non-mammalian model for diabetic microangiopathy." Thesis, University of Manchester, 2000. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.706484.

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Reichart, Lisa Andrea [Verfasser], and Monika [Akademischer Betreuer] Hassel. "Functional analysis of siRNA mediated knockdowns of fibroblast growth factors in Hydra vulgaris / Lisa Reichart ; Betreuer: Monika Hassel." Marburg : Philipps-Universität Marburg, 2021. http://d-nb.info/1226287352/34.

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Motamedi, Mina [Verfasser], and Angelika [Akademischer Betreuer] Böttger. "Characterization of anti-apoptotic protein family members (Bax inhibitor-1 and Lifeguard) in Hydra vulgaris / Mina Motamedi. Betreuer: Angelika Böttger." München : Universitätsbibliothek der Ludwig-Maximilians-Universität, 2013. http://d-nb.info/1038652677/34.

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Book chapters on the topic "Hydra vulgaris"

1

Evangelista, Daniela, Kumar Parijat Tripathi, Valentina Scuotto, and Mario Rosario Guarracino. "HvDBase: A Web Resource on Hydra Vulgaris Transcriptome." In Bioinformatics and Biomedical Engineering, 355–62. Cham: Springer International Publishing, 2015. http://dx.doi.org/10.1007/978-3-319-16480-9_35.

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Gerke, I., K. Zierold, J. Weber, and P. Tardent. "The spatial distribution of cations in nematocytes of Hydra vulgaris." In Coelenterate Biology: Recent Research on Cnidaria and Ctenophora, 661–69. Dordrecht: Springer Netherlands, 1991. http://dx.doi.org/10.1007/978-94-011-3240-4_93.

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3

Gitter, A. H., and R. Golz. "Ohne „tip links“: das mechanosensitive Sinneshaarbündel der Nesselzellen von Hydra vulgaris." In Teil II: Sitzungsbericht, 348–49. Berlin, Heidelberg: Springer Berlin Heidelberg, 1994. http://dx.doi.org/10.1007/978-3-642-84996-1_348.

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4

Kass-Simon, G., and A. A. Scappaticci. "Glutamatergic and GABAnergic control in the tentacle effector systems of Hydra vulgaris." In Coelenterate Biology 2003, 67–71. Dordrecht: Springer Netherlands, 2004. http://dx.doi.org/10.1007/978-1-4020-2762-8_8.

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5

Bosch, Thomas C. G., and Gabriele Praetzel. "The heat shock response in hydra: immunological relationship of hsp60, the major heat shock protein of Hydra vulgaris, to the ubiquitous hsp70 family." In Coelenterate Biology: Recent Research on Cnidaria and Ctenophora, 513–17. Dordrecht: Springer Netherlands, 1991. http://dx.doi.org/10.1007/978-94-011-3240-4_72.

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6

Moros, Maria, Laura Gonzalez-Moragas, Angela Tino, Anna Laromaine, and Claudia Tortiglione. "Invertebrate Models for Hyperthermia: What We Learned From Caenorhabditis elegans and Hydra vulgaris." In Nanomaterials for Magnetic and Optical Hyperthermia Applications, 229–64. Elsevier, 2019. http://dx.doi.org/10.1016/b978-0-12-813928-8.00009-0.

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