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Letteratura scientifica selezionata sul tema "Physcomitrella patens"

Autore: Grafiati

Pubblicato: 4 giugno 2021

Ultima modifica: 11 marzo 2023

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Articoli di riviste sul tema "Physcomitrella patens"

Reski, Ralf, e David J. Cove. "Physcomitrella patens". Current Biology 14, n. 7 (aprile 2004): R261—R262. http://dx.doi.org/10.1016/j.cub.2004.03.016.

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Cove, David. "The Moss, Physcomitrella patens". Journal of Plant Growth Regulation 19, n. 3 (1 settembre 2000): 275–83. http://dx.doi.org/10.1007/s003440000031.

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Zhou, Xun, Guan Nan Guo, Le Qi Wang, Su Lan Bai, Chun Li Li, Rong Yu e Yan Hong Li. "Paenibacillus physcomitrellae sp. nov., isolated from the moss Physcomitrella patens". International Journal of Systematic and Evolutionary Microbiology 65, Pt_10 (1 ottobre 2015): 3400–3406. http://dx.doi.org/10.1099/ijsem.0.000428.

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A Gram-stain-positive, facultatively anaerobic and rod-shaped bacterium, designated strain XBT, was isolated from Physcomitrella patens growing in Beijing, China. The isolate was identified as a member of the genus Paenibacillus based on phenotypic characteristics and phylogenetic inferences. The novel strain was spore-forming, motile, catalase-negative and weakly oxidase-positive. Optimal growth of strain XBT occurred at 28°C and pH 7.0–7.5. The major polar lipids contained diphosphatidylglycerol, phosphatidylglycerol, phosphatidylethanolamine and several unidentified components, including one phospholipid, two aminophospholipids, three glycolipids, one aminolipid and one lipid. The predominant isoprenoid quinone was MK-7. The diamino acid found in the cell-wall peptidoglycan was meso-diaminopimelic acid. The major fatty acid components (>5 %) were anteiso-C15 : 0 (51.2 %), anteiso-C17 : 0 (20.6 %), iso-C16 : 0 (8.3 %) and C16 : 0 (6.7 %). The G+C content of the genomic DNA was 53.3 mol%. Phylogenetic analysis, based on the 16S rRNA gene sequence, showed that strain XBT fell within the evolutionary distances encompassed by the genus Paenibacillus; its closest phylogenetic neighbour was Paenibacillus yonginensis DCY84T (96.6 %). Based on phenotypic, chemotaxonomic and phylogenetic properties, strain XBT is considered to represent a novel species of the genus Paenibacillus, for which the name Paenibacillus physcomitrellae sp. nov., is proposed. The type strain is XBT ( = CGMCC 1.15044T = DSM 29851T).

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Schaefer, D. "Gene targeting in Physcomitrella patens". Current Opinion in Plant Biology 4, n. 2 (1 aprile 2001): 143–50. http://dx.doi.org/10.1016/s1369-5266(00)00150-3.

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Cove, D. J., P. F. Perroud, A. J. Charron, S. F. McDaniel, A. Khandelwal e R. S. Quatrano. "Culturing the Moss Physcomitrella patens". Cold Spring Harbor Protocols 2009, n. 2 (1 febbraio 2009): pdb.prot5136. http://dx.doi.org/10.1101/pdb.prot5136.

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Bricker, Terry M., Adam J. Bell, Lan Tran, Laurie K. Frankel e Steven M. Theg. "Photoheterotrophic growth of Physcomitrella patens". Planta 239, n. 3 (27 novembre 2013): 605–13. http://dx.doi.org/10.1007/s00425-013-2000-3.

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Sha, Wei, Li Wu e Xiao Hong Song. "In Silicon Cloning and Bioinformatics Analysis of an Eukaryotic Initiation Factor 4E Gene from Grimmia pilifera". Applied Mechanics and Materials 138-139 (novembre 2011): 1132–38. http://dx.doi.org/10.4028/www.scientific.net/amm.138-139.1132.

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GH425 gene comes from the Grimmia pilifera drought stress of cDNA library.In this experiment,we have got the full sequence of GH425NO.1 by E-cloning which using GH425 as gene probe,in Physcomitrella patens DNA Datebase.Through using ORFfinder to find out the longest ORF and design primer for it,then, validated the Physcomitrella patens by PT-PCR,and we have obtained corresponding band and proved that the result of silicon cloning is correct and the fragment is contained in Grimmia pilifera P.Beauv.Now,we know the sequence encodes Eukaryotic initiation factor 4E by Blastx,and analysis it with Bioinformatics.

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Sarnighausen, Eric, Virginie Wurtz, Dimitri Heintz, Alain Van Dorsselaer e Ralf Reski. "Mapping of the Physcomitrella patens proteome". Phytochemistry 65, n. 11 (giugno 2004): 1589–607. http://dx.doi.org/10.1016/j.phytochem.2004.04.028.

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Arazi, Tzahi. "MicroRNAs in the moss Physcomitrella patens". Plant Molecular Biology 80, n. 1 (4 marzo 2011): 55–65. http://dx.doi.org/10.1007/s11103-011-9761-5.

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Scholz, Julia, Florian Brodhun, Ellen Hornung, Cornelia Herrfurth, Michael Stumpe, Anna K. Beike, Bernd Faltin, Wolfgang Frank, Ralf Reski e Ivo Feussner. "Biosynthesis of allene oxides in Physcomitrella patens". BMC Plant Biology 12, n. 1 (2012): 228. http://dx.doi.org/10.1186/1471-2229-12-228.

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Più fonti

Tesi sul tema "Physcomitrella patens"

Russell, Angela Julia. "Morphogenesis in the moss Physcomitrella patens". Thesis, University of Leeds, 1993. http://etheses.whiterose.ac.uk/1535/.

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A method was developed for recording the development of moss protonema using time-lapse video microscopy. This has provided a detailed record of the time-course of development from spore germination to the production of gametophores. Detailed records of the growth of primary and secondary chloronema, the transition of primary chloronema to caulonema, and the development of side-branches were obtained. Filaments were found to undergo the transition to caulonema earlier than previously thought. The majority of caulonemas ide-branches were found to begin as chloronema and switch to caulonema after one or two cell cycles. The early cell divisions of bud formation were found to follow a distinct pattern, which was upset by high concentrations of cytokinin and lanthanum. The response of caulonema apical cells to polarotropic light was recorded and compared to the gravitropic response. The time-lapse studies provided the basis for the further development of the quantitative analysis of protonemal branching patterns to include second and third side-branches of a sub-apical cell, and transitional caulonema. Analysing side-branch patterns should allow the detection of developmental mechanisms underlying the determination of side-branch fate. The potential of this method for assessing the effect of hormone treatments and for analysing more precisely mutant phenotypes was explored. An analysis of bud spacing was carried out to determine if the formation of a bud on a filament was inhibitory to other buds forming on the same filament. It was found, to the contrary, that buds tended to form in clusters. The hypothesis that the primary mode of action of cytokinin is an enhanced influx of calcium ions into the cell was investigated. Classical electrophysiology was used in order to detect any change in membrane potential suggestive of ionic fluxes in response to cytokinin treatment. No definitive changes in membrane potential were detected in response to cytokinin. This appeared to rule out the involvement of voltage-regulated channels in cytokinin action. The effects of some inhibitors used in studies of calcium on the moss protonemal system were examined. It is suggested that the concentrations commonly used had toxic effects that were not specific to calcium channels. The ionophore A23187 was used to characterise the protonemal response to a sustained influx of calcium. Some mutant strains were found to have a differential response to the ionophore. This may mean that they have mutations affecting their calcium regulatory system. Two new techniques of imaging calcium were used in order to detect changes in intracellular calcium in response to cytokinin. A method was developed for loading the dual wavelength fluorescent dye Indo-1 into moss protonema using iontophoretic microinjection, and intracellular calcium was imaged using ratio-image technology. Wild-type moss and some mutant strains were also successfully transformed with the gene for apoaequorin, and calcium luminescence measured in response to cold-shock and plant hormones. Some different responsesto temperatures hock were apparent in one of the transformed mutants. Preliminary experiments did not reveal any aequor independent calcium luminescence in response to cytokinin.

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Knight, C. D. "Gravitropism in the moss Physcomitrella patens". Thesis, University of Leeds, 1987. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.383268.

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Lee, Kieran J. D. "The cell wall of Physcomitrella patens". Thesis, University of Leeds, 2004. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.405745.

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Liénard, David. "Aquaporines et évaporation chez Physcomitrella patens". Rouen, 2006. http://www.theses.fr/2006ROUES004.

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P. Patens est une plante poïkilohydre dont toutes les cellules sont en contact avec le milieu extérieur. Nous avons voulu déterminer l'influence des aquaporines au cours de l'évaporation des pseudo feuilles de ses gamétophores. Les aquaporines ont été recherchées dans une banque d'EST de P. Patens. Quatre aquaporines ont été clonées et nous avons obtenu des mutants knock-out pour trois d'entre elles (Pip2;1, Pip2;2 et Pip2;3). Les protoplastes des gamétophores des plantes mutantes correspondantes, pip21 et pip22, présentent une forte diminution de perméabilité, alors que la mutation demeure sans effet sur pip23. Ces plantes ne présentent pas de phénotype visuel lorsqu'elles demeurent dans une atmosphère saturée. Par contre lorsqu'elles sont soumises à un stress hydrique, pip21 et pip22 flétrissent plus facilement que le WT. Nous proposons un modèle pour expliquer cet effet. Nos mesures suggèrent également une activation réciproque entre pip21 et pip22
Poikilohydric plants such as the moss P. Patens, which do not control their water loss, cannot regulate their water potential. We focused our work on the identification of aquaporins involved during evaporation from the pseudo gametophytic leaves of P. Patens. Four aquaporins Pip1;1, Pip2;1, Pip2;2 and Pip2;3, were cloned and knock-out mutations were obtained for three of them (Pip2;1, Pip2;2 et Pip2;3). Protoplasts from the corresponding mutant plants pip21 and pip22, exhibited a strong decrease in their water permeability, while the pip23 protoplast permeabilities remained unaffected. No difference was visible between the wild type and mutants, when plants were grown under a saturated atmosphere. On the opposite, pip21 and pip22 were less resistant than wild type to a water stress. We proposed a model to explain the role of these aquaporins during evaporation. Our measurements also suggest that interactions enhancing their permeabilities should exist between pip21 and pip22

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Ring, Andreas. "Serine/Arginine-rich proteins in Physcomitrella patens". Thesis, Linköpings universitet, Molekylär genetik, 2011. http://urn.kb.se/resolve?urn=urn:nbn:se:liu:diva-80870.

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Serine/Arginine-rich proteins (SR-proteins) have been well characterized in metazoans and in the flowering plant Arabidopsis thaliana. But so far no attempts on characterizing SR-proteins in the moss Physcomitrella patens have been done. SR-proteins are a conserved family of splicing regulators essential for constitutive- and alternative splicing. SR-proteins are mediators of alternative splicing (AS) and may be alternatively spliced themselves as a form of gene regulation. Three novel SR-proteins of the SR-subfamily were identified in P. patens. The three genes show conserved intron-exon structure and protein domain distribution, not surprising since the gene family has evidently evolved through gene duplications. The SR-proteins PpSR40 and PpSR36 show differential tissue-specific expression, whereas PpSR39 does not. Tissue-specific expression of SR-proteins has also been seen in A. thaliana. SR-proteins determine splice-site usage in a concentration dependent manner. SR-protein overexpression experiments in A. thaliana and Oryza sativa have shown alteration of splicing patterns of endogenous SR-proteins. Overexpression of PpSR40 did not alter the splicing patterns of PpSR40, PpSR36 and PpSR39. This suggests that they might not be a substrate for PpSR40. These first results of SR-protein characterization in P. patens may provide insights on the SR-protein regulation mechanisms of the common land plant ancestor.

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Kilaru, Aruna, Jedaidah Chilufya, S. Swati, Imdadul Haq, Suhas Shinde, L. Vidali e Ruth Welti. "Emerging Implications Of Anandamide In Physcomitrella Patens". Digital Commons @ East Tennessee State University, 2016. https://dc.etsu.edu/etsu-works/4791.

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Gömann, Jasmin [Verfasser]. "Sphingolipid biosynthesis in Physcomitrella patens / Jasmin Gömann". Göttingen : Niedersächsische Staats- und Universitätsbibliothek Göttingen, 2021. http://d-nb.info/1236401794/34.

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Hooper, Erica Jane. "Ecological genetics of the moss Physcomitrella patens". Thesis, University of Leeds, 2008. http://etheses.whiterose.ac.uk/286/.

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Molecular genetic studies using the model bryophyte Physcomitrella patens have advanced the body of knowledge surrounding plant functional genetics and molecular biology, yet very little is known about the ecology and population genetics of this species. Although the bryophytes are the second largest group of plants, there is little information regarding the population genetics of bryophytes in general. To address these issues I have conducted the first study into the population genetics of P. patens, where plants from eight populations in Britain have been collected. Sampling within these populations was conducted according to a hierarchical scale, so as to assess not only the level of genetic variation within populations, but how this is structured spatially. Analysis of the plants collected was conducted using amplified fragment length polymorphism (AFLP) analysis. No spatial genetic structure was found within populations of P. patens, and it is hypothesised that the nature of the ephemeral aquatic habitats that P. patens occupies may account for this finding. In this thesis a novel method for studying the mating systems operating within bryophyte populations has been proposed, which exploits the dominant haploid stage of the bryophyte life cycle. This methodology has been applied to natural populations of P. patens, and evidence of mixed mating has been observed. Bryophytes are often overlooked or under-recorded in their natural environment, and distribution data within Great Britain is likely to be inaccurate for a large number of species. This issue is highlighted in this thesis, as a bryophyte species new to Europe has been discovered.

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Chilufya, Jedaidah Y. "Anandamide-Mediated Growth Changes in Physcomitrella patens". Digital Commons @ East Tennessee State University, 2016. https://dc.etsu.edu/etd/3162.

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Anandamide (NAE 20:4) or arachidonlyethanolamine (AEA) is the most widely studied N-acylethanolamine (NAE) because it mediates several physiological functions in mammals. In vascular plants, 12-18C NAEs inhibit growth in an abscisic acid (ABA)-dependent and -independent manner. Anandamide, which is unique to bryophyte Physcomitrella patens, inhibited gametophyte growth and reduced chlorophyll content when applied exogenously. It is hypothesized that anandamide mediates its responses through morphological and cellular changes. Following growth inhibition by short-term anandamide-treatment, microscopic analyses revealed relocated chloroplasts and depolymerized F-actin in protonemal tips. Long-term treatment showed partially bleached gametophyte cells with degraded and browning chloroplasts. These anandamide-mediated responses have physiological implications as AEA may function as a signal for gametophytes to activate secondary dormancy as seen with ABA. Future studies will investigate the role of AEA in mediating stress responses and possible interaction with ABA.

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Kilaru, Aruna. "Emerging Implications of Anandamide in Physcomitrella Patens". Digital Commons @ East Tennessee State University, 2016. https://dc.etsu.edu/etsu-works/4770.

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Libri sul tema "Physcomitrella patens"

Celia, Knight, Perroud Pierre-François e Cove D. J, a cura di. The moss Physcomitrella patens. Ames, Iowa: Wiley-Blackwell, 2009.

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Busch, Hauke. Network theory inspired analysis of time-resolved expression data reveals key players guiding P. patens stem cell development. Freiburg: Universität, 2013.

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Cove, David, Celia Knight, Pierre-François Perroud e Pierre-François Perroud. Annual Plant Reviews, the Moss Physcomitrella Patens. Wiley & Sons, Limited, John, 2009.

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Cove, David, Celia Knight e Pierre-François Perroud. Annual Plant Reviews, the Moss Physcomitrella Patens. Wiley & Sons, Incorporated, John, 2009.

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Bhardwaj, Swati. Cytosine DNA Methyltransferases in the Moss, Physcomitrella patens. LAP Lambert Academic Publishing, 2013.

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Reutter, Kirsten. Expression heterologer Gene in Physcomitrella patens (Hedw.) B.S.G. 1994.

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Hamburg, Universität, a cura di. Zell- und molekularbiologische Untersuchungen der Cytokinin-induzierbaren Gewebedifferenzierung und Chloroplastenteilung bei Physcomitrella patens (Hedw.) B.S.G. 1990.

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Capitoli di libri sul tema "Physcomitrella patens"

Arif, Muhammad Asif, Isam Fattash, Basel Khraiwesh e Wolfgang Frank. "Physcomitrella patens Small RNA Pathways". In Non Coding RNAs in Plants, 139–73. Berlin, Heidelberg: Springer Berlin Heidelberg, 2011. http://dx.doi.org/10.1007/978-3-642-19454-2_10.

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Sugita, Mamoru. "Plastid Transformation in Physcomitrella patens". In Methods in Molecular Biology, 427–37. Totowa, NJ: Humana Press, 2014. http://dx.doi.org/10.1007/978-1-62703-995-6_29.

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Resemann, Hanno. "Lipid Composition of Physcomitrella patens". In Encyclopedia of Lipidomics, 1–6. Dordrecht: Springer Netherlands, 2017. http://dx.doi.org/10.1007/978-94-007-7864-1_125-1.

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Fattash, Isam, Basel Khraiwesh, M. Asif Arif e Wolfgang Frank. "Expression of Artificial MicroRNAs in Physcomitrella patens". In Methods in Molecular Biology, 293–315. Totowa, NJ: Humana Press, 2012. http://dx.doi.org/10.1007/978-1-61779-558-9_25.

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Yamada, Moé, Tomohiro Miki e Gohta Goshima. "Imaging Mitosis in the Moss Physcomitrella patens". In Methods in Molecular Biology, 263–82. New York, NY: Springer New York, 2016. http://dx.doi.org/10.1007/978-1-4939-3542-0_17.

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Schaefer, D. G., G. Bisztray e J. P. Zrÿd. "Genetic Transformation of the Moss Physcomitrella patens". In Plant Protoplasts and Genetic Engineering V, 349–64. Berlin, Heidelberg: Springer Berlin Heidelberg, 1994. http://dx.doi.org/10.1007/978-3-662-09366-5_24.

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Ermert, Anna Lena, Fabien Nogué, Fabian Stahl, Tanja Gans e Jon Hughes. "CRISPR/Cas9-Mediated Knockout of Physcomitrella patens Phytochromes". In Methods in Molecular Biology, 237–63. New York, NY: Springer New York, 2019. http://dx.doi.org/10.1007/978-1-4939-9612-4_20.

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Bonhomme, Sandrine, Fabien Nogué, Catherine Rameau e Didier G. Schaefer. "Usefulness of Physcomitrella patens for Studying Plant Organogenesis". In Methods in Molecular Biology, 21–43. Totowa, NJ: Humana Press, 2012. http://dx.doi.org/10.1007/978-1-62703-221-6_2.

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Sugita, Mamoru. "Plastid Transformation in Physcomitrium (Physcomitrella) patens: An Update". In Methods in Molecular Biology, 321–31. New York, NY: Springer US, 2021. http://dx.doi.org/10.1007/978-1-0716-1472-3_19.

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Bressendorff, Simon, Magnus Wohlfahrt Rasmussen, Morten Petersen e John Mundy. "Chitin-Induced Responses in the Moss Physcomitrella patens". In Methods in Molecular Biology, 317–24. New York, NY: Springer New York, 2017. http://dx.doi.org/10.1007/978-1-4939-6859-6_27.

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Atti di convegni sul tema "Physcomitrella patens"

Wenqun Fu, Zhengbin Chen, Ying Lin, Yuling Wang, Li Li, Xiaoling Teng, Jinmei Fu e Xiaoqing Li. "Functional analysis of histone deacetylase RPD3/HDA1 family in Physcomitrella patens by bioinformatics". In 2011 International Conference on Remote Sensing, Environment and Transportation Engineering (RSETE). IEEE, 2011. http://dx.doi.org/10.1109/rsete.2011.5965941.

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Quan, Xiangyu, Osamu Matoba, Kouichi Nitta, Tamada Yousuke e Yasuhiro Awatsuji. "Live cell imaging of Physcomitrella patens using a multi-modal digital holographic microscope". In 2016 15th Workshop on Information Optics (WIO). IEEE, 2016. http://dx.doi.org/10.1109/wio.2016.7745594.

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Deluca, Claudia. "Shedding light on the role of a heat stress-inducible eIF5A from Physcomitrella patens". In ASPB PLANT BIOLOGY 2020. USA: ASPB, 2020. http://dx.doi.org/10.46678/pb.20.1053076.

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Radin, Ivan. "Moss (Physcomitrella patens) Piezo mechasensitive ion channel homologs positively regulate cell growth and vacuolar morphology". In ASPB PLANT BIOLOGY 2020. USA: ASPB, 2020. http://dx.doi.org/10.46678/pb.20.1372312.

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Ruibal, Cecilia. "Physcomitrella patens dehydrin, PpDHNA, acts like “chaperone” by conffering protection against stress effects through protein stability enhancement". In ASPB PLANT BIOLOGY 2020. USA: ASPB, 2020. http://dx.doi.org/10.46678/pb.20.1052954.

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Castro, Alexandra. "Geme-wide identification, characterization and expression analysis of the Bcl-2 associated athagene (BAG) gene family in Physcomitrella patens". In ASPB PLANT BIOLOGY 2020. USA: ASPB, 2020. http://dx.doi.org/10.46678/pb.20.1052969.

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Zvonarev, S. N., V. S. Matskevich, K. Angelis e V. V. Demidchik. "Qualitative composition of reactive oxygen species generated by salinization and assessment of the effect of elevated NaCl levels on DNA stability in Physcomitrella patens cells". In IX Congress of society physiologists of plants of Russia "Plant physiology is the basis for creating plants of the future". Kazan University Press, 2019. http://dx.doi.org/10.26907/978-5-00130-204-9-2019-178.

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Rapporti di organizzazioni sul tema "Physcomitrella patens"

Christopher, David A., e Avihai Danon. Plant Adaptation to Light Stress: Genetic Regulatory Mechanisms. United States Department of Agriculture, maggio 2004. http://dx.doi.org/10.32747/2004.7586534.bard.

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Abstract (sommario):

Original Objectives: 1. Purify and biochemically characterize RB60 orthologs in higher plant chloroplasts; 2. Clone the gene(s) encoding plant RB60 orthologs and determine their structure and expression; 3. Manipulate the expression of RB60; 4. Assay the effects of altered RB60 expression on thylakoid biogenesis and photosynthetic function in plants exposed to different light conditions. In addition, we also examined the gene structure and expression of RB60 orthologs in the non-vascular plant, Physcomitrella patens and cloned the poly(A)-binding protein orthologue (43 kDa RB47-like protein). This protein is believed to a partner that interacts with RB60 to bind to the psbA5' UTR. Thus, to obtain a comprehensive view of RB60 function requires analysis of its biochemical partners such as RB43. Background & Achievements: High levels of sunlight reduce photosynthesis in plants by damaging the photo system II reaction center (PSII) subunits, such as D1 (encoded by the chloroplast tpsbAgene). When the rate of D1 synthesis is less than the rate of photo damage, photo inhibition occurs and plant growth is decreased. Plants use light-activated translation and enhanced psbAmRNA stability to maintain D1 synthesis and replace the photo damaged 01. Despite the importance to photosynthetic capacity, these mechanisms are poorly understood in plants. One intriguing model derived from the algal chloroplast system, Chlamydomonas, implicates the role of three proteins (RB60, RB47, RB38) that bind to the psbAmRNA 5' untranslated leader (5' UTR) in the light to activate translation or enhance mRNA stability. RB60 is the key enzyme, protein D1sulfide isomerase (Pill), that regulates the psbA-RN :Binding proteins (RB's) by way of light-mediated redox potentials generated by the photosystems. However, proteins with these functions have not been described from higher plants. We provided compelling evidence for the existence of RB60, RB47 and RB38 orthologs in the vascular plant, Arabidopsis. Using gel mobility shift, Rnase protection and UV-crosslinking assays, we have shown that a dithiol redox mechanism which resembles a Pill (RB60) activity regulates the interaction of 43- and 30-kDa proteins with a thermolabile stem-loop in the 5' UTR of the psbAmRNA from Arabidopsis. We discovered, in Arabidopsis, the PD1 gene family consists of II members that differ in polypeptide length from 361 to 566 amino acids, presence of signal peptides, KDEL motifs, and the number and positions of thioredoxin domains. PD1's catalyze the reversible formation an disomerization of disulfide bonds necessary for the proper folding, assembly, activity, and secretion of numerous enzymes and structural proteins. PD1's have also evolved novel cellular redox functions, as single enzymes and as subunits of protein complexes in organelles. We provide evidence that at least one Pill is localized to the chloroplast. We have used PDI-specific polyclonal and monoclonal antisera to characterize the PD1 (55 kDa) in the chloroplast that is unevenly distributed between the stroma and pellet (containing membranes, DNA, polysomes, starch), being three-fold more abundant in the pellet phase. PD1-55 levels increase with light intensity and it assembles into a high molecular weight complex of ~230 kDa as determined on native blue gels. In vitro translation of all 11 different Pill's followed by microsomal membrane processing reactions were used to differentiate among PD1's localized in the endoplasmic reticulum or other organelles. These results will provide.1e insights into redox regulatory mechanisms involved in adaptation of the photosynthetic apparatus to light stress. Elucidating the genetic mechanisms and factors regulating chloroplast photosynthetic genes is important for developing strategies to improve photosynthetic efficiency, crop productivity and adaptation to high light environments.

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