Relevant bibliographies by topics / Delisea pulchra

Academic literature on the topic 'Delisea pulchra'

Author: Grafiati
Published: 4 June 2021
Last updated: 29 January 2023

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Journal articles on the topic "Delisea pulchra"

1

Denys, R., JC Coll, and BF Bowden. "Delisea pulchra (cf. fimbriata) Revisited. The Structural Determination of Two New Metabolites From the Red Alga Delisea pulchra." Australian Journal of Chemistry 45, no. 10 (1992): 1625. http://dx.doi.org/10.1071/ch9921625.

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Two new metabolites (1a) and (2a) have been isolated from the red alga Delisea pulchra . The previously reported metabolites (3)-(7) were also isolated, and the full n.m.r. characterization of (3), (4) and (6) is reported for the first time.
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2

DE NYS, R., J. C. COLL, and B. F. BOWDEN. "ChemInform Abstract: Delisea pulchra (cf. fimbriata) Revisited. The Structural Determination of Two New Metabolites from the Red Alga Delisea pulchra." ChemInform 24, no. 6 (August 21, 2010): no. http://dx.doi.org/10.1002/chin.199306304.

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3

Dworjanyn, SA, R. de Nys, and PD Steinberg. "Chemically mediated antifouling in the red alga Delisea pulchra." Marine Ecology Progress Series 318 (August 3, 2006): 153–63. http://dx.doi.org/10.3354/meps318153.

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4

Wright, J. T., G. C. Zuccarello, and P. D. Steinberg. "Genetic structure of the subtidal red alga Delisea pulchra." Marine Biology 136, no. 3 (April 28, 2000): 439–48. http://dx.doi.org/10.1007/s002270050703.

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5

de Nys, Rocky, Anthony D. Wright, Gabriele M. König, and Otto Sticher. "New halogenated furanones from the marine alga delisea pulchra (cf. fimbriata)." Tetrahedron 49, no. 48 (January 1993): 11213–20. http://dx.doi.org/10.1016/s0040-4020(01)81808-1.

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6

Burke, Catherine, Staffan Kjelleberg, and Torsten Thomas. "Selective Extraction of Bacterial DNA from the Surfaces of Macroalgae." Applied and Environmental Microbiology 75, no. 1 (October 31, 2008): 252–56. http://dx.doi.org/10.1128/aem.01630-08.

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ABSTRACT A novel method has been developed for the selective extraction of DNA from surface-associated bacterial communities from the two model marine benthic algae Ulva australis and Delisea pulchra. The extracted DNA had no detectable contamination with host DNA, was recovered in high yield and quality, and was representative of the bacterial community on the algal surfaces. The DNA is suitable for a variety of subsequent applications, including the construction of large-insert clone libraries and metagenomic sequencing.
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7

Zozaya‐Valdés, Enrique, Alexandra J. Roth‐Schulze, Suhelen Egan, and Torsten Thomas. "Microbial community function in the bleaching disease of the marine macroalgae Delisea pulchra." Environmental Microbiology 19, no. 8 (May 11, 2017): 3012–24. http://dx.doi.org/10.1111/1462-2920.13758.

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8

Dworjanyn, S. A., R. De Nys, and P. D. Steinberg. "Localisation and surface quantification of secondary metabolites in the red alga Delisea pulchra." Marine Biology 133, no. 4 (May 11, 1999): 727–36. http://dx.doi.org/10.1007/s002270050514.

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9

Rasmussen, Thomas Bovbjerg, Michael Manefield, Jens Bo Andersen, Leo Eberl, Uffe Anthoni, Carsten Christophersen, Peter Steinberg, Staffan Kjelleberg, and Michael Givskov. "How Delisea pulchra furanones affect quorum sensing and swarming motility in Serratia liquefaciens MG1." Microbiology 146, no. 12 (December 1, 2000): 3237–44. http://dx.doi.org/10.1099/00221287-146-12-3237.

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10

Maximilien, R., R. de Nys, C. Holmström, L. Gram, M. Givskov, K. Crass, S. Kjelleberg, and PD Steinberg. "Chemical mediation of bacterial surface colonisation by secondary metabolites from the red alga Delisea pulchra." Aquatic Microbial Ecology 15 (1998): 233–46. http://dx.doi.org/10.3354/ame015233.

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Dissertations / Theses on the topic "Delisea pulchra"

1

Longford, Sharon Rae Faculty of Science UNSW. "The ecology of epiphytic bacteria on the marine red alga Delisea pulchra." Awarded by:University of New South Wales, 2007. http://handle.unsw.edu.au/1959.4/36783.

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Bacteria are ubiquitous to marine living surfaces, taking on a broad spectrum of roles from mutualistic to pathogenic. Despite their universality, much remains unknown about their basic ecology and interactions with higher organisms. To address this gap, this thesis firstly examines the bacterial communities associated with three co-occurring marine eukaryote hosts from temperate Australia: the demosponge Cymbastela concentrica, the subtidal red macroalga Delisea pulchra and the intertidal green macroalga Ulva australis. Molecular characterisation of the bacterial communities was undertaken using 16S rRNA gene library analysis to compare within-host (alpha) and between-host (beta) diversity for the three microbial communities. This study highlights the potentially substantial contribution host-associated microorganisms could have on marine microbial diversity. The remaining focus for this thesis was on the bacterial community associated with D. pulchra. This alga produces a suite of biologically active secondary metabolites (furanones) that non-toxically inhibit acyl homoserine lactone (AHL)-driven quorum sensing in bacteria, affecting a range of phenotypes including colonisation and virulence traits. The ecology of D. pulchra???s epiphytic bacteria was investigated using a mechanistic approach to explain bacterial colonisation patterns. In particular, concepts and models of ecological succession founded in eukaryote ecology were investigated. The thesis concludes with a study investigating the effect of furanones and elevated temperature on bacteria-induced disease and thallus bleaching of D. pulchra. In the presence of furanones colonisation and infection of two Roseobacter isolates from D. pulchra???s epiphytic bacterial community were inhibited. Ruegeria strain R11 was demonstrated to have temperature regulated virulence, which caused thallus bleaching in furanone-free algae. The implications of elevated sea temperatures resulting from global warming for algal health are discussed.
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2

Nandiraju, Santhisree. "Chemical and Biological Investigation of the Antarctic Red Alga Delisea pulchra." [Tampa, Fla.] : University of South Florida, 2004. http://purl.fcla.edu/fcla/etd/SFE0000620.

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3

Case, Rebecca Biotechnology &amp Biomolecular Sciences Faculty of Science UNSW. "Molecular- and culturebased approaches to unraveling the chemical cross-talk between Delisea pulchra and Ruegeria strain R11." Awarded by:University of New South Wales. School of Biotechnology and Biomolecular Sciences, 2006. http://handle.unsw.edu.au/1959.4/30394.

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Delisea pulchra is a red macroalga that produces furanones, a class of secondary metabolites that inhibit the growth and colonization of a range of micro- and macroorganisms. In bacteria, furanones specifically inhibit acyl homoserine lactone (AHL)- driven quorum sensing, which is known to regulate a variety of colonization and virulence traits. This thesis aims to unveil multiple aspects of the chemically mediated interactions between an alga and its bacterial flora. It was demonstrated that the quorum sensing genetic machinery of bacteria is laterally transferred, making traditional 16S rRNA gene based-diversity techniques poorly suited to identify quorum sensing species. Previous studies had shown that AHL-producing bacteria belonging to the roseobacter clade can be readily isolated from D. pulchra. Because of this, it was decided to use a roseobacter epiphytic isolate from this alga, Ruegeria strain R11, to conduct a series of colonization experiments on furanone free and furanone producing D. pulchra. Furanones were shown to inhibit Ruegeria strain R11's colonization and infection of D. pulchra. In addition, it was demonstrated that Ruegeria strain R11 has temperature-regulated virulence, similar to what is seen for the coral pathogen Vibrio shiloi. Rising ocean temperatures may explain bleached D. pulchra specimens recently observed at Bare Island, Australia. To assess whether quorum sensing is common within the roseobacter clade, cultured isolates from the Roseobacter, Ruegeria and Roseovarius genera were screened for AHL production. Half of the bacteria screened produced the quorum sensing signal molecules, AHLs. These AHLs were identified using an overlay of an AHL reporter strain in conjunction with thin layer chromatography (TLC). The prevalence of quorum sensing within the roseobacter clade, suggests that these species may occupy marine niches where cellular density is high (such as surface associated communities on substratum and marine eukaryotes). Diversity studies in marine microbial communities require appropriate molecular markers. The 16S rRNA gene is the most commonly used marker for molecular microbial ecology studies. However, it has several limitations and shortcomings, to which attention has been drawn here. The rpoB gene is an alternate ???housekeeping??? gene used in molecular microbial ecology. Therefore, the phylogenetic properties of these two genes were compared. At most taxonomic levels the 16S rRNA and rpoB genes offer similar phylogenetic resolution. However, the 16S rRNA gene is unable to resolve relationships between strains at the subspecies level. This lack of resolving power is shown here to be a consequence of intragenomic heterogeneity.
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