Search Results (5)

Although Crepis was the first model plant group in which chromosomal changes were considered to play an important role in speciation, their chromosome structure and evolution have been barely investigated using molecular cytogenetic methods. The aim of the study was to provide a better understanding of the patterns and directions of Crepis chromosome evolution, using comparative analyses of rDNA loci number and localisation. The chromosome base number and chromosomal organisation of 5S and 35S rDNA loci were analysed in the phylogenetic background for 39 species of Crepis, which represent the evolutionary lineages of Crepis sensu stricto and Lagoseris, including Lapsana communis. The phylogenetic relationships among all the species were inferred from nrITS and newly obtained 5S rDNA NTS sequences. Despite high variations in rDNA loci chromosomal organisation, most species had a chromosome with both rDNA loci within the same (usually short) chromosomal arm. The comparative analyses revealed several independent rDNA loci number gains and loci repositioning that accompanied diversification and speciation in Crepis. Some of the changes in rDNA loci patterns were reconstructed for the same evolutionary lineages as descending dysploidy. Full article

A foundation stone of Hans Georg Gadamer’s philosophical hermeneutics is the notion of the sensus communis. The philosophical significance of a “sensus communis” (common sense) begins with Aristotle, who offered scattered reflections. The topic was taken up in earnest in Enlightenment thought and in German idealism, but it became more of an individual faculty, lacking the deep sense of community and tradition found in earlier formulations. In this paper, the author demonstrates Gadamer’s debt to Pietist thought, examining his appropriation and use of the theology of Friedrich Christoph Oetinger (1702–1782), a leading figure in Swabian Pietism, whose ideas had a significant impact in theological circles and broader cultural life. Gadamer’s critique of the Enlightenment’s ‘prejudice against prejudice,’ owes a debt to the Pietist conception of the sensus communis and his practical philosophy to Pietism’s emphasis on ‘application’ as a fundamental aspect of a hermeneutical triad. Full article

Among other attributes, the Betaproteobacterial genus Azoarcus has biotechnological importance for plant growth-promotion and remediation of petroleum waste-polluted water and soils. It comprises at least two phylogenetically distinct groups. The “plant-associated” group includes strains that are isolated from the rhizosphere or root interior of the C4 plant Kallar Grass, but also strains from soil and/or water; all are considered to be obligate aerobes and all are diazotrophic. The other group (now partly incorporated into the new genus Aromatoleum) comprises a diverse range of species and strains that live in water or soil that is contaminated with petroleum and/or aromatic compounds; all are facultative or obligate anaerobes. Some are diazotrophs. A comparative genome analysis of 32 genomes from 30 Azoarcus-Aromatoleum strains was performed in order to delineate generic boundaries more precisely than the single gene, 16S rRNA, that has been commonly used in bacterial taxonomy. The origin of diazotrophy in Azoarcus-Aromatoleum was also investigated by comparing full-length sequences of nif genes, and by physiological measurements of nitrogenase activity using the acetylene reduction assay. Based on average nucleotide identity (ANI) and whole genome analyses, three major groups could be discerned: (i) Azoarcus comprising Az. communis, Az. indigens and Az. olearius, and two unnamed species complexes, (ii) Aromatoleum Group 1 comprising Ar. anaerobium, Ar. aromaticum, Ar. bremense, and Ar. buckelii, and (iii) Aromatoleum Group 2 comprising Ar. diolicum, Ar. evansii, Ar. petrolei, Ar. toluclasticum, Ar. tolulyticum, Ar. toluolicum, and Ar. toluvorans. Single strain lineages such as Azoarcus sp. KH32C, Az. pumilus, and Az. taiwanensis were also revealed. Full length sequences of nif-cluster genes revealed two groups of diazotrophs in Azoarcus-Aromatoleum with nif being derived from Dechloromonas in Azoarcus sensu stricto (and two Thauera strains) and from Azospira in Aromatoleum Group 2. Diazotrophy was confirmed in several strains, and for the first time in Az. communis LMG5514, Azoarcus sp. TTM-91 and Ar. toluolicum T^T. In terms of ecology, with the exception of a few plant-associated strains in Azoarcus (s.s.), across the group, most strains/species are found in soil and water (often contaminated with petroleum or related aromatic compounds), sewage sludge, and seawater. The possession of nar, nap, nir, nor, and nos genes by most Azoarcus-Aromatoleum strains suggests that they have the potential to derive energy through anaerobic nitrate respiration, so this ability cannot be usefully used as a phenotypic marker to distinguish genera. However, the possession of bzd genes indicating the ability to degrade benzoate anaerobically plus the type of diazotrophy (aerobic vs. anaerobic) could, after confirmation of their functionality, be considered as distinguishing phenotypes in any new generic delineations. The taxonomy of the Azoarcus-Aromatoleum group should be revisited; retaining the generic name Azoarcus for its entirety, or creating additional genera are both possible outcomes. Full article

This essay aims to reconsider the practice of art criticism. The first part aims to clear away some misconceptions that reduce art criticism to a fundamentally negative discourse that asserts a theory/practice distinction. In the second part, the essay tries to think of art criticism as collaborative writing alongside rather than about an artist. The third part, however, highlights some problems insofar as communication and collaboration have become imbricated within post-Fordist socioeconomic frameworks. In addition, the fourth part seeks to propose another direction by suggesting why art criticism and Kantian aesthetics may discover a renewed interest in one another through rethinking the sensus communis as an alternative to post-Fordist sociality. Full article

Hannah Arendt’s interest in literature was part of a broader concern, which was inspired by her reading of Kant, with the role played by aesthetic representation in ethical and political judgment. Her rich repertoire of writings about literature deserves to be considered alongside the works more commonly associated with the ethical turn in literary studies. Arendt’s unique contribution, I argue here, is a heightened awareness of the assimilative tendencies of aesthetic and cultural representation, coupled with a critique of empathy as potentially illusory or even condescending when confronted with a political judgment that is set up to absorb difference. To recognize alterity requires us, if we follow Arendt, to understand otherness “in acting and speaking,” as she argued in The Human Condition. Much of her philosophical and political work was dedicated to understanding the obstacles facing human togetherness, so that she could suggest ways for us to overcome them. Aesthetic representation, in her view, was one of the most effective strategies for achieving community because it offers a reconstruction of another’s viewpoints that invites both an imaginative projection and a sustained cognitive effort. Full article