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  • 1
    Online Resource
    Online Resource
    Plant Microbiology. (2004)
    CT :Taylor & Francis Group,
    Details
    Keywords: Plants--Microbiology. ; Electronic books.
    Description / Table of Contents: Plant Microbiology provides a comprehensive source of information on DNA sequencing and mapping, the newest technology and procedures in areas such as radiation hybrid mapping, FISH and specialized sequencing techniques are covered. The book also describes how transgene expression is controlled in plants and how advanced information strategies can be used to manipulate and modify the plant genome. An exciting final chapter provides and overview of all the applications of plant transformation in agriculture, medicine and industry.
    Type of Medium: Online Resource
    Pages: 1 online resource (325 pages)
    Edition: 1st ed.
    ISBN: 9780203506608
    URL: https://ebookcentral.proquest.com/lib/geomar/detail.action?docID=199264
    DDC: 577.8/52
    Language: English
    Note: Intro -- Plant Microbiology -- Copyright -- Contents -- Abbreviations -- Contributors -- Preface -- 1 The diversity, ecology and molecular detection of arbuscular mycorrhizal fungi -- 2 Rhizobial signals convert pathogens to symbionts at the legume interface -- 3 The root nodule bacteria of legumes in natural systems -- 4 Effects of transgenic plants on soil micro-organisms and nutrient dynamics -- 5 Fungal endophytes: hitch-hikers of the green world -- 6 Actinorhizal symbioses diversity and biogeography -- 7 Chemical signalling by bacterial plant pathogens -- 8 Quorum quenching-manipulating quorum sensing for disease control -- 9 Plant disease and climate change -- 10 Genetic diversity of bacterial plant pathogens -- 11 Genetic diversity and population structure of plant-pathogenic species in the genus Fusarium -- 12 Genome sequence analysis of prokaryotic plant pathogens -- 13 Analysis of microbial communities in the plant environment -- 14 The importance of microbial culture collections to plant microbiology -- Index.
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  • 2
    Electronic Resource
    Electronic Resource
    Patterns of invertebrate biodiversity across a natural edge (2003)
    Oxford, UK : Blackwell Science Pty
    Austral ecology 28 (2003), S. 0 
    Details
    ISSN: 1442-9993
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Biology
    Notes: Abstract Most ecologists are comfortable with the notion of habitats as recognizable entities and also with situations where the junction between two adjacent habitats forms a discrete edge. Such edges form naturally because of sharp changes in important edaphic, geomorphological, climatic or chemical properties to which plants, in particular, respond. Less clear is the effect of such edges on assemblages of mobile organisms, especially invertebrates that operate at relatively small spatial scales. The objective of the present study was to sample invertebrate composition across a natural edge between a well-developed riparian habitat on fluvial sands and a saltbush habitat developed on a stony gibber plain in a semi-arid region of New South Wales, Australia. A total of 150 pitfall traps on five 1-km-long transects that straddled the edge produced more than 13 000 adult specimens from 21 ordinal invertebrate taxa. A total of 10 446 beetle, ant, wasp, fly and springtail specimens were further sorted into 426 morphospecies. Comparisons and estimates of trends in abundance and richness were made, along with computation of multivariate dissimilarity and permutation statistics, to determine if the land system edge was coincident with changes in invertebrate abundance and composition. These analyses were unable to detect disjunctions in diversity coincident with the edge. The data suggest that many taxa are either present consistently in both habitats or are mostly found in one habitat but ‘leak’ several hundred metres across into the other. Few taxa were unique to either habitat. The result is that assemblage composition for invertebrates changes gradually over distances of up to 400 m either side of the edge and that the distance to a recognizable change in composition is taxon dependent. Even sharp habitat edges, as defined by discrete changes in soils and plants, are not edges but broad transition zones for many invertebrate taxa. There are several implications of these results, especially for landscape ecology.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1046/j.1442-9993.2003.01240.x
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    Paper (German National Licenses)
    Fulltext
  • 3
    Electronic Resource
    Electronic Resource
    Spatial scaling of microbial eukaryote diversity (2004)
    [s.l.] : Macmillian Magazines Ltd.
    Nature 432 (2004), S. 747-750 
    Details
    ISSN: 1476-4687
    Source: Nature Archives 1869 - 2009
    Topics: Biology , Chemistry and Pharmacology , Medicine , Natural Sciences in General , Physics
    Notes: [Auszug] Patterns in the spatial distribution of organisms provide important information about mechanisms that regulate the diversity of life and the complexity of ecosystems. Although microorganisms may comprise much of the Earth's biodiversity and have critical roles in biogeochemistry and ...
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1038/nature03034
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    Paper (German National Licenses)
    Fulltext
  • 4
    Electronic Resource
    Electronic Resource
    Recovery of new integron classes from environmental DNA (2001)
    Oxford, UK : Blackwell Publishing Ltd
    FEMS microbiology letters 195 (2001), S. 0 
    Details
    ISSN: 1574-6968
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Biology
    Notes: Integrons are genetic elements known for their role in the acquisition and expression of genes conferring antibiotic resistance. Such acquisition is mediated by an integron-encoded integrase, which captures genes that are part of gene cassettes. To test whether integrons occur in environments with no known history of antibiotic exposure, PCR primers were designed to conserved regions of the integrase gene and the gene cassette recombination site. Amplicons generated from four environmental DNA samples contained features typical of the integrons found in antibiotic-resistant and pathogenic bacteria. The sequence diversity of the integrase genes in these clones was sufficient to classify them within three new classes of integron. Since they are derived from environments not associated with antibiotic use, integrons appear to be more prevalent in bacteria than previously observed.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1111/j.1574-6968.2001.tb10498.x
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    Paper (German National Licenses)
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  • 5
    Electronic Resource
    Electronic Resource
    Diverse, yet-to-be-cultured members of the Rubrobacter subdivision of the Actinobacteria are widespread in Australian arid soils (2000)
    Oxford, UK : Blackwell Publishing Ltd
    FEMS microbiology ecology 33 (2000), S. 0 
    Details
    ISSN: 1574-6941
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Biology
    Notes: Phylogenetic analyses of ribosomal RNA gene sequences (rDNAs) retrieved from an Australian desert soil sample (Sturt National Park) revealed the presence of a number of clones which branched deeply from the high GC Gram-positive division line of descent. The most abundant group of these clones were related to Rubrobacter. An oligonucleotide probe was designed to have broad specificity to Rubrobacter and relatives. This probe was used to interrogate eight rDNA libraries representing four distinct land forms within the Australian arid zone. Relative abundance of Rubrobacter-relatives in these samples ranged from 2.6 to 10.2%. Clones from these libraries were selected for sequence analysis on the basis of a heteroduplex mobility assay to maximise the diversity represented in the sample. Phylogenetic analyses of these rDNA clones and Rubrobacter-related clones reported in the literature show strong support for three distinct groups. Database-searching revealed ‘Rubrobacteria’ were relatively abundant in a number of published soil rDNA libraries but absent from others. A PCR assay for group-1 ‘Rubrobacteria’ was used to test for their presence in 21 environmental samples. Only marine and arid-zone soil samples gave positive PCR results. Taken together these results indicate ‘Rubrobacteria’ are a widespread group of variable abundance and diversity.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1111/j.1574-6941.2000.tb00733.x
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    Paper (German National Licenses)
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  • 6
    Electronic Resource
    Electronic Resource
    Microorganisms, Australia and the Convention on Biological Diversity (1999)
    Springer
    Biodiversity and conservation 8 (1999), S. 1399-1415 
    Details
    ISSN: 1572-9710
    Keywords: Australia ; microbial diversity ; MOSAICC ; the Convention on Biological Diversity
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Abstract The Convention on Biological Diversity arose as an international agreement for the conservation and continued exploitation of Earth's biological diversity (biodiversity). It directly affects those involved in conservation, exploitation and investigation of biodiversity in all its forms, as well as affecting the viability of all life. Australia is one of more than 170 countries that have ratified the Convention. Its involvement in this Convention will be considered in terms of the National Strategy for the Conservation of Biological Diversity with a focus on the coverage of microorganisms within this strategy. Microorganisms represent a major part of the biodiversity on Earth but, as yet, remain relatively unknown. Among those microorganisms that have been described, many, originating from a range of countries, have been deposited in culture collections worldwide. The Convention contains articles that impact on ex situ collections, although precise protocols are not set out therein. An international code of conduct is now being formulated to ensure ongoing access to and exchange of microorganisms in the interests of sustainable development in industrialised and developing nations.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1023/A:1008986324592
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    Paper (German National Licenses)
    Fulltext
  • 7
    Electronic Resource
    Electronic Resource
    Amplification of anonymous DNA fragments using pairs of long primers generates reproducible DNA fingerprints that are sensitive to genetic variation (1997)
    Weinheim : Wiley-Blackwell
    Electrophoresis 18 (1997), S. 1512-1518 
    Details
    ISSN: 0173-0835
    Keywords: Polymerase chain reaction DNA fingerprinting ; Randomly amplified polymorphic DNA ; Repetitive element polymerase chain reaction ; Microsatellite primed polymerase chain reaction ; Chemistry ; Biochemistry and Biotechnology
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Biology , Chemistry and Pharmacology
    Notes: The reproducibility and potential applications of anonymous amplification protocols can be improved by using pairs of primers, each of 18 to 24 bases, to replace the single 8 to 10 base primers normally used in randomly amplified polymorphic DNA (RAPD) or DNA amplification fingerprinting (DAF) methods. Amplification using large primer pairs (LP-RAPD) generates 5 to 30 bands that can be resolved on standard agarose gels. Complex fingerprints can be readily generated from viruses, bacteria, fungi, plants, invertebrates and vertebrates. We also present evidence that a number of polymerase chain reaction (PCR) methods, including those based on the use of enterobacterial repetitive intergenic consensus (ERIC-PCR) or microsatellite primed (MP-PCR) sequence, may in essence operate by the same mechanism as LP-RAPD. Using standard LP-RAPD protocols, reproducible fingerprints can be generated from a single specimen using different thermocyclers, regardless of the mechanism used for thermocycling (air-cooled, Peltier effect, or robotic arm). LP-RAPD is sensitive to intraspecific and interspecific genetic variation, demonstrated here by analysis of mites and apple cultivars. Approximately 50% of LP-RAPD products are expected to have different primers at either end. Polymorphic bands with this arrangement can be recovered from the gel and directly sequenced using the LP-RAPD primers themselves. The efficiency of sequencing is improved by the length of the LP-RAPD primers. This method has the potential to allow the production of allele-specific species markers in less than two days.
    Additional Material: 5 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/elps.1150180904
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    Paper (German National Licenses)
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  • 8
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    Seawater carbonate chemistry and sperm swimming speed, fertilization success of the Australasian sea urchin Heliocidaris erythrogramma in lab experiment (2012)
    PANGAEA
    In:  Supplement to: Schlegel, Peter; Havenhand, Jonathan N; Gillings, Michael R; Williamson, Jane E (2012): Individual Variability in Reproductive Success Determines Winners and Losers under Ocean Acidification: A Case Study with Sea Urchins. PLoS ONE, 7(12), e53118, https://doi.org/10.1371/journal.pone.0053118.t005
    Details
    Publication Date: 2024-03-15
    Description: Background: Climate change will lead to intense selection on many organisms, particularly during susceptible early life stages. To date, most studies on the likely biotic effects of climate change have focused on the mean responses of pooled groups of animals. Consequently, the extent to which inter-individual variation mediates different selection responses has not been tested. Investigating this variation is important, since some individuals may be preadapted to future climate scenarios. Methodology/Principal Findings: We examined the effect of CO2-induced pH changes ("ocean acidification") in sperm swimming behaviour on the fertilization success of the Australasian sea urchin Heliocidaris erythrogramma, focusing on the responses of separate individuals and pairs. Acidification significantly decreased the proportion of motile sperm but had no effect on sperm swimming speed. Subsequent fertilization experiments showed strong inter-individual variation in responses to ocean acidification, ranging from a 44% decrease to a 14% increase in fertilization success. This was partly explained by the significant relationship between decreases in percent sperm motility and fertilization success at delta pH = 0.3, but not at delta pH = 0.5. Conclusions and Significance: The effects of ocean acidification on reproductive success varied markedly between individuals. Our results suggest that some individuals will exhibit enhanced fertilization success in acidified oceans, supporting the concept of 'winners' and 'losers' of climate change at an individual level. If these differences are heritable it is likely that ocean acidification will lead to selection against susceptible phenotypes as well as to rapid fixation of alleles that allow reproduction under more acidic conditions. This selection may ameliorate the biotic effects of climate change if taxa have sufficient extant genetic variation upon which selection can act.
    Keywords: Alkalinity, total; Animalia; Aragonite saturation state; Benthic animals; Benthos; Bicarbonate ion; Bottles or small containers/Aquaria (〈20 L); Calcite saturation state; Calculated using seacarb after Nisumaa et al. (2010); Carbon, inorganic, dissolved; Carbonate ion; Carbonate system computation flag; Carbon dioxide; Coast and continental shelf; Echinodermata; EXP; Experiment; Fertilization success rate; Fugacity of carbon dioxide (water) at sea surface temperature (wet air); Heliocidaris erythrogramma; Laboratory experiment; Long_Bay_and_Bare_Island; Motile sperm, speed; OA-ICC; Ocean Acidification International Coordination Centre; Partial pressure of carbon dioxide (water) at sea surface temperature (wet air); pH; Potentiometric titration; Reproduction; Response ratio, logarithm; Salinity; Sample code/label; Single species; South Pacific; Species; Sperm concentration; Sperm motility; Temperate; Temperature, water; Treatment
    Type: Dataset
    Format: text/tab-separated-values, 1375 data points
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    DATA PANGAEA
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