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  • 101.
    Arnqvist G, Rowe L
    Uppsala University, Teknisk-naturvetenskapliga vetenskapsområdet, Faculty of Science and Technology, Biology, Department of Evolutionary Biology. ZOOEKOLOGI.
    Antagonistic coevolution between the sexes in a group of insects2002In: NATURE, Vol. 415, p. 787-789Article in journal (Refereed)
  • 102.
    Arnqvist G, Rowe L
    Uppsala University, Teknisk-naturvetenskapliga vetenskapsområdet, Faculty of Science and Technology, Biology, Department of Evolutionary Biology. ZOOEKOLOGI.
    Correlated evolution of male and female morphologies in water striders2002In: EVOLUTION, Vol. 56, p. 936-947Article in journal (Refereed)
  • 103.
    Arvola, Marie
    Uppsala University, Teknisk-naturvetenskapliga vetenskapsområdet, Faculty of Science and Technology, Biology, Department of Evolutionary Biology.
    Immunological aspects of maternal-foetal interactions in mice2001Doctoral thesis, comprehensive summary (Other academic)
    Abstract [en]

    Mammalian pregnancy is an immunological paradox. The foetus, which expresses both paternal and maternal cell-surface molecules, has to be protected from rejection by the maternal immune system. At the same time, the mother has to have an efficient immune defence and must provide her offspring with antibodies.

    The first part of this thesis investigates some of the mechanisms involved in the foetal avoidance of maternal rejection reactions. Placental absence of MHC class II expression, as well as a bias for Th2-cytokines at the maternal-foetal interface are suggested to be important for foetal survival. The results showed that placental MHC class II expression cannot be induced in vivo. Transfections of trophoblast cells with MHC class II genes, however, resulted in detectable MHC class II cell-surface expression, indicating that a post-transcriptional block does not exist in these cells.

    By using IL-4- and IL-10-double deficient mice, it was shown that neither maternal nor foetal expression of these cytokines were crucial for completion of allogeneic pregnancy.

    In the second part of the thesis, the effect of transmission of immunoglobulin G (IgG) from the mother to the offspring was studied. It was observed that viable maternal Ig-secreting cells occasionally infiltrated the B cell-deficient offspring and remained functional for long periods. In this study "green fluorescent mice" were used as a tool. Furthermore, neonatal ingestion of wild type milk increased the survival of adoptively transferred B-lineage cells in B cell-deficient mice, suggesting that suckling of IgG-containing milk could be used to facilitate B cell-reconstitution in B cell-deficient mice. Finally, results from studies on normal mice showed that absence of maternal IgG-transmission during their neonatal development resulted in elevated serum-IgG production, as well as enhanced immune reactions upon immunisations in adult life. This showed that maternal IgG can have long-term immunoregulatory effects in the offspring.

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    FULLTEXT01
  • 104.
    Attitalla, Idress Hamad
    et al.
    Uppsala University, Teknisk-naturvetenskapliga vetenskapsområdet, Faculty of Science and Technology, Biology, Department of Evolutionary Biology, Molecular Evolution.
    Fatehi, Jamshid
    Brishammar, Sture
    Biology and partial sequencing of an endophytic Fusarium oxysporum and plant defense complexManuscript (Other academic)
  • 105.
    Attitalla, Idress Hamad
    et al.
    Uppsala University, Disciplinary Domain of Science and Technology, Biology, Department of Evolutionary Biology, Molecular Evolution.
    Fatehi, Jamshid
    Uppsala University, Disciplinary Domain of Science and Technology, Biology, Department of Evolution, Genomics and Systematics, Molecular Evolution.
    Levenfors, Jens
    Uppsala University, Disciplinary Domain of Science and Technology, Biology, Department of Evolution, Genomics and Systematics, Molecular Evolution.
    Brishammar, Sture
    Uppsala University, Disciplinary Domain of Science and Technology, Biology, Department of Evolution, Genomics and Systematics, Molecular Evolution.
    A rapid molecular method for differentiating two special forms (lycopersici and radicis-lycopersici) of Fusarium oxysporum2004In: Mycological Research, ISSN 0953-7562, E-ISSN 1469-8102, Vol. 108, no 7, p. 787-794Article in journal (Refereed)
    Abstract [en]

    Two pathogenic special forms (f. sp.) of the Fusarium oxysporum species complex f. sp. lycopersici (Fol) and f. sp. radicis-lycopersici (Forl) are morphologically indistinguishable. Although they are pathogenic to the same host genus Lycopersicon (tomato), and infect the same tomato cultivar, they form distinct diseases; Fol causes wilt and Forl causes crown rot and root rot. These two special forms apparently exist as genetically isolated populations, based on vegetative compatibility and molecular variation at the DNA level. In seeking efficient diagnostic tools for differentiating Fol and Forl isolates, we examined three techniques: isozyme analysis, mitochondrial DNA (mtDNA) RFLP by HaeIII-digestion of total genomic DNA, and an osmotic method using high performance liquid chromatography (HPLC) to detect fungal pigments. The isolates were collected from geographically widespread locations. Distinct HPLC-profile differences were found between an endophytic non-pathogenic isolate and the other pathogenic isolates. However, the direct mtDNA RFLP technique proved to be an efficient diagnostic tool for routine differentiation of Fol and Forl isolates.

  • 106.
    Attitalla, Idress Hamad
    et al.
    Uppsala University, Teknisk-naturvetenskapliga vetenskapsområdet, Faculty of Science and Technology, Biology, Department of Evolutionary Biology, Molecular Evolution.
    Johansson, Petra Maria
    Brishammar, Sture
    Gerhardson, Berndt
    Pseudomonas sp. strain MF30 suppresses Fusarium wilt of tomato in vivo2001In: Phytopathologia Mediterranea, ISSN 0031-9465, Vol. 40, no 3, p. 234-239Article in journal (Refereed)
  • 107.
    Attitalla, Idress Hamad
    et al.
    Uppsala University, Teknisk-naturvetenskapliga vetenskapsområdet, Faculty of Science and Technology, Biology, Department of Evolutionary Biology, Molecular Evolution.
    Johnson, Paul
    Brishammar, Sture
    Quintanilla, Pablo
    Systemic resistance to Fusarium wilt in tomato induced by Phytophthora cryptogea2001In: Journal of Phytopathology, ISSN 0931-1785, Vol. 149, no 7-8, p. 373-380Article in journal (Refereed)
  • 108.
    Atuma, S.S.
    et al.
    Uppsala University, Teknisk-naturvetenskapliga vetenskapsområdet, Faculty of Science and Technology, Biology, Department of Evolutionary Biology.
    Aune, M.
    Darnerud, P.O.
    Cnattingius, S.
    Wernroth, M.L.
    Wicklund Glynn, A.
    Polybrominated diphenyl ethers (PBDEs) in human milk from Sweden.2001In: Persistent, bioaccumulative and toxic chemicals. 2. Assessment and new chemicals. Washington DC. American Chemical Society. ACS Symposium Series, 2001, Vol. 773, p. 235-242Conference paper (Refereed)
  • 109.
    Ausili, P.
    et al.
    Uppsala University, Teknisk-naturvetenskapliga vetenskapsområdet, Faculty of Science and Technology, Biology, Department of Evolutionary Biology.
    Borisova, A.
    Lindblad, P.
    Mårtensson, A.
    Cadmium affects the interaction between peas and root nodule bacteria.2002In: Acta Agriculturae Scandinavica, section B, Soil and Plant Science, Vol. 52, p. 8-17Article in journal (Refereed)
  • 110.
    Axelsson, Anna
    et al.
    Uppsala University, Teknisk-naturvetenskapliga vetenskapsområdet, Faculty of Science and Technology, Biology, Department of Evolutionary Biology.
    Åbjörnsson, Kajsa
    Wagner, Balint
    Bjerselius, Rickard
    Olsén, Håkan K
    The behaviour of the dytiscid Acilius sulcatus to odours from hungry and satiated fish at day and night conditions1996In: Bulletin of the North American Benthological Society, Vol. 147Article in journal (Refereed)
  • 111.
    Axelsson, Erik
    et al.
    Uppsala University, Disciplinary Domain of Science and Technology, Biology, Department of Evolutionary Biology. Uppsala University, Disciplinary Domain of Science and Technology, Biology, Department of Ecology and Genetics, Evolutionary Biology.
    Ellegren, Hans
    Uppsala University, Disciplinary Domain of Science and Technology, Biology, Department of Evolutionary Biology. Uppsala University, Disciplinary Domain of Science and Technology, Biology, Department of Ecology and Genetics, Evolutionary Biology.
    Quantification of Adaptive Evolution of Genes Expressed in Avian Brain and the Population Size Effect on the Efficacy of Selection2009In: Molecular biology and evolution, ISSN 0737-4038, E-ISSN 1537-1719, Vol. 26, no 5, p. 1073-1079Article in journal (Refereed)
    Abstract [en]

    Whether protein evolution is mainly due to fixation of beneficial alleles by positive selection or to random genetic drift has remained a contentious issue over the years. Here, we use two genomewide polymorphism data sets collected from chicken populations, together with divergence data from >5,000 chicken-zebra finch gene orthologs expressed in brain, to assess the amount of adaptive evolution in protein-coding genes of birds. First, we show that estimates of the fixation index (FI, the ratio of fixed nonsynonymous-to-synonymous changes over the ratio of the corresponding polymorphisms) are highly dependent on the character of the underlying data sets. Second, by using polymorphism data from high-frequency alleles, to avoid the confounding effect of slightly deleterious mutations segregating at low frequency, we estimate that about 20% of amino acid changes have been brought to fixation through positive selection during avian evolution. This estimate is intermediate to that obtained in humans (lower) and flies as well as bacteria (higher), and is consistent with population genetics theory that stipulates a positive relationship between the efficiency of selection and the effective population size. Further, by comparing the FIs for common and all alleles, we estimate that approximate to 20% of nonsynonymous variation segregating in chicken populations represent slightly deleterious mutations, which is less than in Drosophila. Overall, these results highlight the link between the effective population size and positive as well as negative selection.

  • 112. Axelsson, Erik
    et al.
    Smith, Nick G.C.
    Sundström, Hannah
    Uppsala University, Teknisk-naturvetenskapliga vetenskapsområdet, Faculty of Science and Technology, Biology, Department of Evolutionary Biology.
    Berlin, Sofia
    Ellegren, Hans
    Mutation rate variation in the avian genomeManuscript (Other academic)
  • 113.
    Axelsson, R
    et al.
    Uppsala University, Teknisk-naturvetenskapliga vetenskapsområdet, Faculty of Science and Technology, Biology, Department of Evolutionary Biology, Physiological Botany.
    Lindblad, P
    The genes encoding the bidirectional hydrogenase in Anabaena sp. strain PCC 7120 are transcribed as two polycistronic operonsManuscript (Other academic)
  • 114.
    Axelsson, R
    et al.
    Uppsala University, Teknisk-naturvetenskapliga vetenskapsområdet, Faculty of Science and Technology, Biology, Department of Evolutionary Biology, Physiological Botany.
    Lindblad, P
    Transcriptional regulation of Nostoc hydrogenases: Effects of oxygen, hydrogen, and nickel2002In: Applied and Environmental Microbiology, Vol. 61, p. 444-447Article in journal (Refereed)
  • 115.
    Axelsson, R
    et al.
    Uppsala University, Teknisk-naturvetenskapliga vetenskapsområdet, Faculty of Science and Technology, Biology, Department of Evolutionary Biology, Physiological Botany.
    Oxelfelt, F
    Lindblad, P
    Transcriptional regulation of Nostoc uptake hydrogenase1999In: FEMS Microbiology Letters, Vol. 170, p. 77-81Article in journal (Refereed)
  • 116.
    Axelsson, R
    et al.
    Uppsala University, Teknisk-naturvetenskapliga vetenskapsområdet, Faculty of Science and Technology, Biology, Department of Evolutionary Biology.
    Oxelfelt, F
    Lindblad, P
    Transcriptional regulation of Nostoc uptake hydrogenase1999In: FEMS MICROBIOLOGY LETTERS, ISSN 0378-1097, Vol. 170, no 1, p. 77-81Article in journal (Other scientific)
    Abstract [en]

    Filamentous. heterocystous cyanobacteria may contain both an uptake hydrogenase (encoded by hupSL) and a bidirectional enzyme (encoded by hoxFUYH). The present study identifies three strains (Anabaena variabilis, Nostoc muscorum and Nostoc sp. strain PCC

  • 117.
    Axelsson, R
    et al.
    Uppsala University, Teknisk-naturvetenskapliga vetenskapsområdet, Faculty of Science and Technology, Biology, Department of Evolutionary Biology, Physiological Botany.
    Rittner, N
    Baum, M
    Lindblad, P
    Wünschiers, R
    Expression analysis of genes in Anabaena sp. strain PCC 7120 during nitrogen-fixing and non-nitrogen fixing conditionsManuscript (Other academic)
  • 118.
    Axelsson, Rikard
    Uppsala University, Teknisk-naturvetenskapliga vetenskapsområdet, Faculty of Science and Technology, Biology, Department of Evolutionary Biology, Physiological Botany.
    Cyanobacterial Hydrogen Metabolism: Transcriptional Regulation of the Hydrogenases in Filamentous Strains2003Doctoral thesis, comprehensive summary (Other academic)
    Abstract [en]

    Cyanobacteria are a heterogeneous group of phototrophic microorganisms. Many cyanobacteria have the capacity to fix atmospheric nitrogen. During the process of nitrogen fixation, molecular hydrogen is produced. Three enzymes are directly involved in hydrogen metabolism in cyanobacteria. A nitrogenase, evolving hydrogen during nitrogen-fixation, an uptake hydrogenase, recycling the hydrogen produced by nitrogenase, and a bidirectional hydrogenase that has the capacity to both take up and produce hydrogen. The main objective in this thesis was to examine the transcriptional regulation of both the uptake and the bidirectional hydrogenase in filamentous cyanobacteria.

    The transcriptional regulation of the uptake hydrogenase was demonstrated to be influenced by external conditions in Nostoc muscorum and Nostoc punctiforme. Nickel, molecular hydrogen, and anaerobic conditions all induced the relative amount of uptake hydrogenase transcript. In addition, a transcript could be detected in nitrogen-fixing, but not in non-nitrogen fixing conditions.

    The transcriptional regulation of the bidirectional hydrogenase in N. muscorum and Anabaena PCC 7120 was also examined. The relative amount of transcript from the bidirectional hydrogenase in both strains was demonstrated to increase during anaerobic conditions. Moreover, experiments using N. muscorum demonstrated that addition of nickel also increase the amount of transcript. However, no change in the relative amount of transcript from the bidirectional hydrogenase could be observed by additional hydrogen or during a shift from non-nitrogen fixing to nitrogen fixing conditions.

    The genes responsible for maturation of the hydrogenase were identified, cloned and sequenced in N. punctiforme. The transcription of the genes was examined and all genes were located on a single transcript. Like the uptake hydrogenase, a transcript could be detected under nitrogen-fixing but not under non-nitrogen fixing conditions.

    Initial studies, using microarrays, were used to analyse and compare the transcription of a large set of Anabaena PCC 7120 genes under non-nitrogen and nitrogen-fixing conditions. Both up- and down-regulated genes could be identified.

    This thesis advances the knowledge about the transcriptional regulation of the hydrogenases in filamentous cyanobacteria and can be used as a platform for further experiments aiming at a modified hydrogen metabolism.

    List of papers
    1. Transcriptional regulation of Nostoc uptake hydrogenase
    Open this publication in new window or tab >>Transcriptional regulation of Nostoc uptake hydrogenase
    1999 In: FEMS Microbiology Letters, Vol. 170, p. 77-81Article in journal (Refereed) Published
    Identifiers
    urn:nbn:se:uu:diva-90843 (URN)
    Available from: 2003-09-17 Created: 2003-09-17Bibliographically approved
    2. Transcriptional regulation of Nostoc hydrogenases: Effects of oxygen, hydrogen, and nickel
    Open this publication in new window or tab >>Transcriptional regulation of Nostoc hydrogenases: Effects of oxygen, hydrogen, and nickel
    2002 In: Applied and Environmental Microbiology, Vol. 61, p. 444-447Article in journal (Refereed) Published
    Identifiers
    urn:nbn:se:uu:diva-90844 (URN)
    Available from: 2003-09-17 Created: 2003-09-17Bibliographically approved
    3. Cloning and characterization of a hyp gene cluster in the filamentous cyanobacterium Nostoc sp. strain 73102
    Open this publication in new window or tab >>Cloning and characterization of a hyp gene cluster in the filamentous cyanobacterium Nostoc sp. strain 73102
    Show others...
    2001 In: FEMS Microbiology Letters, Vol. 201, p. 59-64Article in journal (Refereed) Published
    Identifiers
    urn:nbn:se:uu:diva-90845 (URN)
    Available from: 2003-09-17 Created: 2003-09-17Bibliographically approved
    4. The genes encoding the bidirectional hydrogenase in Anabaena sp. strain PCC 7120 are transcribed as two polycistronic operons
    Open this publication in new window or tab >>The genes encoding the bidirectional hydrogenase in Anabaena sp. strain PCC 7120 are transcribed as two polycistronic operons
    Manuscript (Other academic)
    Identifiers
    urn:nbn:se:uu:diva-90846 (URN)
    Available from: 2003-09-17 Created: 2003-09-17 Last updated: 2010-01-13Bibliographically approved
    5. Expression analysis of genes in Anabaena sp. strain PCC 7120 during nitrogen-fixing and non-nitrogen fixing conditions
    Open this publication in new window or tab >>Expression analysis of genes in Anabaena sp. strain PCC 7120 during nitrogen-fixing and non-nitrogen fixing conditions
    Show others...
    Manuscript (Other academic)
    Identifiers
    urn:nbn:se:uu:diva-90847 (URN)
    Available from: 2003-09-17 Created: 2003-09-17 Last updated: 2010-01-13Bibliographically approved
    6. Hydrogenases and hydrogen metabolism of cyanobacteria
    Open this publication in new window or tab >>Hydrogenases and hydrogen metabolism of cyanobacteria
    Show others...
    2002 In: Microbiology and Molecular Reviews, Vol. 66, p. 1-20Article in journal (Refereed) Published
    Identifiers
    urn:nbn:se:uu:diva-90848 (URN)
    Available from: 2003-09-17 Created: 2003-09-17Bibliographically approved
    Download full text (pdf)
    FULLTEXT01
  • 119.
    Axelsson, Rikard
    et al.
    Uppsala University, Disciplinary Domain of Science and Technology, Biology, Department of Evolutionary Biology.
    Lindblad, Peter
    Transcriptional Regulation of Nostoc Hydrogenases: Effects of Hydrogen, Oxygen and Nickel.2002In: Applied and environmental microbiology, ISSN 0099-2240, Vol. 68, p. 444-447Article in journal (Refereed)
  • 120.
    Ayasse, M
    et al.
    Uppsala University, Teknisk-naturvetenskapliga vetenskapsområdet, Faculty of Science and Technology, Biology, Department of Evolutionary Biology.
    Birnbaum J, Tengö J
    van Doorn A, Taghizadeh T
    Francke W,
    Dominanzverhalten und chemische Kommunikation bei Hummeln (Hym., Apidae).1998In: 3. Hymenopterologen-Tagung, Stuttgart, 1998, p. 11-Conference paper (Other scientific)
  • 121.
    Ayasse, M
    et al.
    Uppsala University, Teknisk-naturvetenskapliga vetenskapsområdet, Faculty of Science and Technology, Biology, Department of Evolutionary Biology.
    Birnbaum, JS
    Tengö, J
    van, Doorn A
    Taghizadeh, T
    Francke, W
    Caste- and colony-specific chemical signals on eggs of the bumble bee Bombus terrestris L. (Hymenoptera: Apidae).1999In: Chemoecology, Vol. 9, p. 119-126Article in journal (Refereed)
  • 122.
    AYASSE, M
    et al.
    Uppsala University, Teknisk-naturvetenskapliga vetenskapsområdet, Faculty of Science and Technology, Biology, Department of Evolutionary Biology.
    MARLOVITS, T
    TENGO, J
    TAGHIZADEH, T
    FRANCKE, W
    ARE THERE PHEROMONAL DOMINANCE SIGNALS IN THE BUMBLEBEE BOMBUS-HYPNORUM L (HYMENOPTERA, APIDAE)1995In: APIDOLOGIE, ISSN 0044-8435, Vol. 26, no 3, p. 163-180Article in journal (Other scientific)
    Abstract [en]

    In the bumblebee Bombus hypnorum (Apidae) 132 chemical compounds could be identified by GC/MS and coinjection. The behavior of individual workers was observed to characterize them as dominant, subordinate or foragers. Queens, dominance groups of workers a

  • 123.
    Ayasse, M
    et al.
    Uppsala University, Teknisk-naturvetenskapliga vetenskapsområdet, Faculty of Science and Technology, Biology, Department of Evolutionary Biology.
    Marlovits, Th
    Tengö, J
    Taghizadeh, T
    Francke, W
    Pheromonal dominance signals in primitively eusocial bees.1996In: XX Intern Congr Entomol, Firenze, 1996Conference paper (Other scientific)
  • 124.
    Ayasse, M.
    et al.
    Uppsala University, Teknisk-naturvetenskapliga vetenskapsområdet, Faculty of Science and Technology, Biology, Department of Evolutionary Biology. ECOLOGICAL RESEARCH STATION ÖLAND.
    Paxton, RJ
    Tengö, J
    Mating behavior and chemical communication in the order Hymenoptera2001In: Annu Rev Entomol, Vol. 46, p. 31-78Article, book review (Other scientific)
  • 125.
    Ayasse, M
    et al.
    Uppsala University, Teknisk-naturvetenskapliga vetenskapsområdet, Faculty of Science and Technology, Biology, Ecological Research Station, Ölands Skogsby.
    Zimma, B
    Tengö, J
    van Doorn, A
    Ibarra, F
    Francke, W
    Chemische Kommunikation in der Reproduktionsbiologie von Kuckuckshummeln2002In: Beiträge der 5. Hymenopterologen-Tagung, Stuttgart, 2002, p. 18-19Conference paper (Other scientific)
  • 126.
    Ayasse, Manfred
    et al.
    Uppsala University, Teknisk-naturvetenskapliga vetenskapsområdet, Faculty of Science and Technology, Biology, Department of Evolutionary Biology.
    Marlovits, Thomas
    Tengö, Jan
    Taghizadeh, Timo
    Francke, Wittko
    Gibt es pheromonale Dominanzsignale bei primitiv eusozialen Bienen?1995In: 15. Tagung Dtsch.-sprach. IUSSI, Utrecht, The Netherlands, 1995, p. 86-Conference paper (Other scientific)
  • 127. Azeria, Ermias T.
    et al.
    Sanmartin, Isabel
    Uppsala University, Disciplinary Domain of Science and Technology, Biology, Department of Evolutionary Biology.
    Ås, Stefan
    Uppsala University, Disciplinary Domain of Science and Technology, Biology, Department of Evolutionary Biology.
    Carlson, Allan
    Burgess, Neil
    Biogeographic patterns of the East African coastal forest vertebrate fauna2007In: Biodiversity and Conservation, ISSN 0960-3115, E-ISSN 1572-9710, Vol. 16, no 4, p. 883-912Article in journal (Refereed)
    Abstract [en]

    The archipelago-like coastal forest of East Africa is one of the highest priority ecosystems for biodiversity conservation worldwide. Here we investigate patterns of species richness and biogeographic distribution among birds, mammals and reptiles of these forests, using distribution data obtained from recently published reviews and information collated by the WWF Eastern Africa Coastal Forest Ecoregion Programme. Birds and mammals species were divided into forest specialists and generalists, and forest specialist reptiles into 'coastal' and 'forest' endemics. The species richness of birds and generalist mammals increased with area, and is probably a result of area-dependent extinction. Only in birds, however, species richness increased with decreasing isolation, suggesting possible isolation-dependent colonization. Forest diversity, associated to altitudinal range, is important for specialist birds and mammals, whose species richness increased with wider altitudinal range. The number of relict coastal endemic and forest endemic reptiles was higher in forests with wider altitudinal ranges and on relatively higher altitude, respectively. Such forests have probably provided a suitable (and perhaps stable) environment for these species through time, thus increasing their persistence. Parsimony analysis of distributions (PAD) and cluster analyses showed geographical distance and general ecological similarity among forests as a determinant factor in bird distribution patterns, with compositional similarity decreasing with increasing inter-forest distance. Compositional similarity patterns of mammals among the forests did not show a strong geographical correspondence or a significant correlation with inter-forest distance, and those of reptiles were not resolved, with very low similarity levels among forest faunas. Our results suggest that the relative importance (and causal relationship) of forest attributes affecting the distribution of the East African coastal forest vertebrate fauna varies depending on life history traits such as dispersal ability and forest specialization. The groupings in PAD are partly congruent with some of the previous classifications of areas of endemism for this region, supporting the 'naturalness' of these regions.

  • 128.
    Backlund, M
    et al.
    Uppsala University, Teknisk-naturvetenskapliga vetenskapsområdet, Faculty of Science and Technology, Biology, Department of Evolutionary Biology.
    Oxelman, B
    Bremer, B
    Phylogenetic relationships within the Gentianales based on ndhF and rbcL sequences, with particular reference to the Loganiaceae2000In: AMERICAN JOURNAL OF BOTANY, ISSN 0002-9122, Vol. 87, no 7, p. 1029-1043Article in journal (Refereed)
    Abstract [en]

    Phylogenetic relationships in the Gentianales with focus on Loganiaceae sensu late are evaluated using parsimony analyses of nucleotide sequence data from the plastid genes rbcL and ndhF. Inter- and intrafamilial relationships in the Gentianales. whic

  • 129.
    Backéus, Ingvar
    Uppsala University, Disciplinary Domain of Science and Technology, Biology, Department of Evolutionary Biology, Plant Ecology. Växtekologi.
    Rehabilitation for whom? The case of Kondoa Irangi Hills, Tanzania2001In: Dryland Biodiversity, Vol. 4, p. 16-18Article in journal (Refereed)
  • 130.
    Backéus, Ingvar
    Uppsala University, Disciplinary Domain of Science and Technology, Biology, Department of Evolutionary Biology, Plant Ecology.
    The late Quaternary vegetation history of Sweden1999In: Swedish plant geography: dedicated to Eddy van der Maarel on his 65th birthday / [ed] Rydin, Håkan; Snoeijs, Pauli; Diekmann, Martin, Uppsala: Uppsala universitet, 1999, Vol. 4, p. 15-20Chapter in book (Refereed)
  • 131.
    Backéus, Ingvar
    et al.
    Uppsala University, Disciplinary Domain of Science and Technology, Biology, Department of Evolutionary Biology, Plant Ecology.
    Tekle, Kebrom
    Uppsala University, Disciplinary Domain of Science and Technology, Biology, Department of Evolutionary Biology, Plant Ecology.
    Experiences from a project on landscape ecology and ecological rehabilitation in Southern Wello, Ethiopia2001In: Sustainable development of dryland areas of East Africa: EC Directorate General XII. Proc. of the Int. Workshop, Addis Ababa 1998, European Commission, Directorate General XII. , 2001, p. 283-289Chapter in book (Refereed)
  • 132.
    Badyaev AV, Qvarnstrom A
    Uppsala University, Teknisk-naturvetenskapliga vetenskapsområdet, Faculty of Science and Technology, Biology, Department of Evolutionary Biology. ZOOEKOLOGI.
    Putting sexual traits into the context of an organism: A life-history perspective in studies of sexual selection2002In: AUK, Vol. 119, p. 301-310Article in journal (Refereed)
  • 133.
    Baglione, V
    et al.
    Uppsala University, Teknisk-naturvetenskapliga vetenskapsområdet, Faculty of Science and Technology, Biology, Department of Evolutionary Biology. POPULATION BIOLOGY.
    Canestrari, D
    Marcos, J M
    Ekman, J
    Kin selection in cooperative alliances of Carrion crows2003In: Science, Vol. 300, p. 1947-1949Article in journal (Refereed)
  • 134.
    Baglione, V
    et al.
    Uppsala University, Teknisk-naturvetenskapliga vetenskapsområdet, Faculty of Science and Technology, Biology, Department of Evolutionary Biology.
    Canestrari, D
    Marcos, J M
    Griesser, M
    Ekman, J
    History, environment, and social behaviour: experimentally induced cooperative breeding in the carrion crow2002In: Proceedings of the royal society of London Series B, Vol. 269, p. 1247-1251Article in journal (Refereed)
  • 135.
    Baglione, V
    et al.
    Uppsala University, Teknisk-naturvetenskapliga vetenskapsområdet, Faculty of Science and Technology, Biology, Department of Evolutionary Biology.
    Marcos, J M
    Canestrari, D
    Cooperatively breeding groups of carrion crow Corvus corone corone in northern Spain2002In: Auk, Vol. 119, p. 790-799Article in journal (Refereed)
  • 136.
    Baglione, V
    et al.
    Uppsala University, Teknisk-naturvetenskapliga vetenskapsområdet, Faculty of Science and Technology, Biology, Department of Evolutionary Biology.
    Marcos, J M
    Canestrari, D
    Ekman, J
    Direct fitness benefits of group liviing in a complex cooperative society of carrion crows Corvus corone corone2002In: Animal Behaviour, Vol. 64, p. 885-891Article in journal (Refereed)
  • 137.
    Bagnulo, E
    Uppsala University, Teknisk-naturvetenskapliga vetenskapsområdet, Faculty of Science and Technology, Biology, Department of Evolutionary Biology.
    Nesting and foraging biology of the flower-specialist bee Dasypoda hirtipes (Melittidae).1996In: Soziale Insekten. Zus. 16 IUSSI, Graz, , p. 1-17Report (Other scientific)
  • 138. Baguñà, Jaume
    et al.
    Ruiz-Trillo, Iñaki
    Paps, Jordi
    Loukota, Mercè
    Ribera, Carles
    Jondelius, Ulf
    Uppsala University, Teknisk-naturvetenskapliga vetenskapsområdet, Faculty of Science and Technology, Biology, Department of Evolutionary Biology.
    Riutort, Marta
    The first bilaterian organisms; simple or complex?: New molecular evidence2001In: Int. J. Dev. Biol., Vol. 45, p. S133-S134Article in journal (Refereed)
  • 139.
    Bahrami, Fariba
    Uppsala University, Teknisk-naturvetenskapliga vetenskapsområdet, Faculty of Science and Technology, Biology, Department of Evolutionary Biology.
    Methylsulphonyl-chlorobenzenes and the olfactory system: Comparative toxicity of the 2,5- and 2,6-dichlorinated isomers in mice2000Doctoral thesis, comprehensive summary (Other academic)
    Abstract [en]

    Methyl sulphone metabolites of chlorinated aryl hydrocarbons are persistentenvironmental pollutants that can bioaccumulate in animals and humans. Little is known about the toxicological effects of these metabolites and this thesis is an attempt to increase this limited knowledge. Tissue-binding, toxicity and neuro-behavioural effects of methylsulphonyl-2,6dichlorobenzene [2,6-(diCl-MeSO2-B)] and methylsulphonyl-2,5-dichlorobenzene [2,5-(diCl-MeSO2-B)] were examined on mice.

    Both substances resulted in a strong uptake in the olfactory mucosa (OM). Only 2,6-(diCl-MeSO2-B) induced toxicity in the OM, originating from a primary lesion in the Bowman's glands (BG). An in situ CYP-catalysed activation of 2,6-(diCl-MeSO2-B) seems to occur in the BG giving rise to reactive intermediates which either conjugate with glutathione or induce local toxicity. Subsequent secondary lesions in the OM include: severe degenerationof the neuroepithelium, fibrosis, ossification and polyposis. These effects resulted from a single ip dose and were permanent. Long lasting induction of GFAP in the olfactory bulb (OB) and behavioural deficits were also observed and considered to be caused by damaged olfactory neurons and/or metabolites translocated to the OB. Although the OM was more damaged in male mice, acquisition deficits occurred only in female mice.

    2,5-(diCl-MeSO2-B) did not induce OM toxicity, GFAP or learning deficits in either sex. However, observed motor activity responses indicate that, although 2,5-(diCl-MeSO2-B) is not olfacto-toxic, it is neuro-toxic.

    1,3-Dichloro-, 1,4-dichloro- or 1,2,3-trichloro-benzene did not induce damage in the OM indicating that an electron withdrawing substituent in the primary position and 2,6-positioned chlorine atoms is a structural requirement for OM toxicity. Persistent, dose-, time-, tissue- and sex-dependent effects on the olfactory system induced by 2,6-(diCl-MeS2-B) together with the lack of lesions in the OM or brain by 2,5-(diCl-MeSO2-B), makes this chemical pair a reliable and versatile tool for olfactory research.

  • 140.
    Bangyeekhun, Eakaphun
    Uppsala University, Teknisk-naturvetenskapliga vetenskapsområdet, Faculty of Science and Technology, Biology, Department of Evolutionary Biology, Comparative Physiology.
    Parasite on Crayfish: Characterisation of Their Pathogenesis, Host Interactions and Diversity2002Doctoral thesis, comprehensive summary (Other academic)
    Abstract [en]

    The crayfish plague refractory crayfish, Pacifastacus leniusculus, which can harbour the fungal parasite within melanotic sheath, are found to constitutively express the gene encoding for prophenoloxidase (proPO) after mimicking parasite attack. In contrast, the susceptible crayfish, Astacus astacus, responds to the parasite by increased levels of proPO transcript, particularly in the semigranular haemocytes. The upregulation of proPO could confer a temporary resistance towards the fungal infection, suggesting that additional factors are involved in maintaining the balance between host and parasite. The resistant crayfish may have adapted to the parasite by increasing the transcript level of immune genes. The parasite can be considered as a symbiont since it does not harm the host rather than it activates the immune gene and possibly preventing other pathogens to become established.

    Two serine proteinase genes encoding a subtilisin-like (AaSP1) and a trypsin (AaSP2) enzyme were isolated from the crayfish plague fungus, Aphanomyces astaci. These proteinases are prepropeptides and generate mature proteins of 39 kDa and 29 kDa, respectively. Characterisation of AaSP1 suggests that the enzyme may be involved in intracellular control mechanisms rather than playing a role in pathogenesis. The AaSP2 transcript was not controlled by catabolic repression, but was induced by crayfish plasma, implying a role in pathogenesis toward the crayfish host.

    Physiology and genetics of five Aphanomyces strains, which were isolated from moribund crayfish, were characterised with regard to their pathogen diversity. These strains are not virulent against crayfish. Some physiological properties of these strains differed from A. astaci, such as growth rate, germination and production of chitinase. Genetic analysis clearly indicated that they are not related to A. astaci and their name are proposed to be Aphanomyces repetans.

    The crayfish P. leniusculus was found to be susceptible to white spot syndrome virus infection. The virus has a significant effect to the population of crayfish haemocyte. The number and proportion of granular cell from virus-infected crayfish were higher than in controls, indicating granular cells are more resistant to and may interact by some means with the virus.

    Two morphotypes of the crayfish parasite Psorospermium haeckeli obtained from different crayfish hosts of different geographical origin were analysed for ribosomal ITS DNA in order to compare their genetic diversity. The sequence difference between them was found largely in ITS 1 and ITS 2 regions, which was variable in length and showed 66% and 58% sequence similarity. Thus, different morphotypes of P. haeckeli are genetically diverse.

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  • 141.
    Barros, M. P., Pedersén, M., Colepicolo, P. and Snoeijs, P.
    Uppsala University, Teknisk-naturvetenskapliga vetenskapsområdet, Faculty of Science and Technology, Biology, Department of Evolutionary Biology. Department of Ecology and Evolution, Plant Ecology. PLANT ECOLGY.
    Self-shading protects phytoplankton communities against H2O2-induced oxidative damage2003In: Aquatic Microbial Ecology, Vol. 30, p. 275-282Article in journal (Refereed)
  • 142.
    Bartosch-Härlid, A., Berlin, S. , Smith, NGC., Möller, AP & Ellegren, H.
    Uppsala University, Teknisk-naturvetenskapliga vetenskapsområdet, Faculty of Science and Technology, Biology, Department of Evolutionary Biology.
    Life history and the male mutation bias2003In: Evolution, Vol. 57, p. 2398-2406Article in journal (Other scientific)
  • 143.
    Baumstark, AC
    et al.
    Uppsala University, Teknisk-naturvetenskapliga vetenskapsområdet, Faculty of Science and Technology, Biology, Department of Evolutionary Biology.
    Vogel, W
    Schulze, A
    Akhverdyan, M
    Reisert, I
    Just, W
    Analysis of Dmrt1 in Ellobius lutescens: Evidence for the exclusion of a testis inducing function.2001In: AMERICAN JOURNAL OF HUMAN GENETICS, Vol. 69, no 4, p. 956 -Other (Other scientific)
  • 144.
    Baur, B
    et al.
    Uppsala University, Teknisk-naturvetenskapliga vetenskapsområdet, Faculty of Science and Technology, Biology, Department of Evolutionary Biology.
    Baur, A
    Habitat-related dispersal in the rock-dwelling land snail Chondrina clienta.1995In: Ecography, Vol. 18, p. 123-130Article in journal (Refereed)
  • 145.
    Baur, B
    et al.
    Uppsala University, Teknisk-naturvetenskapliga vetenskapsområdet, Faculty of Science and Technology, Biology, Department of Evolutionary Biology.
    Baur, A
    Xanthoria parietina as a food resource and shelter for the land snail Balea perversa.1997In: Lichenologist, Vol. 29, p. 99-102Article in journal (Refereed)
  • 146.
    Baur, B
    et al.
    Uppsala University, Teknisk-naturvetenskapliga vetenskapsområdet, Faculty of Science and Technology, Biology, Department of Evolutionary Biology.
    Fröberg, L
    Baur, A
    Species diversity and grazing damage in a calcicolous lichen community on top of stone walls in Öland, Sweden.1995In: Ann Bot Fennici, Vol. 32, p. 239-250Article in journal (Refereed)
  • 147.
    Becker, Georg
    et al.
    Uppsala University, Teknisk-naturvetenskapliga vetenskapsområdet, Faculty of Science and Technology, Biology, Department of Evolutionary Biology.
    Holfeld, Harald
    Hasselrot, Anders T
    Fiebig, Douglas M
    Menzler, Dominic A
    Use of a microscope photometer to analyze in vivo fluoroscence intensity of epilithic microalgae grown on artificial substrata1997In: Applied and Environmental Microbiology, p. 1318-1325Article in journal (Refereed)
  • 148. Becker, N D
    et al.
    Petric, MZgomba, CBoase, CDahl, ChristineUppsala University, Disciplinary Domain of Science and Technology, Biology, Department of Evolutionary Biology, Systematic Zoology.Lane, JKaiser, A
    Mosquitoes and their Control2003Collection (editor) (Other academic)
  • 149. Becker, N D
    et al.
    Petric, MZgomba, CBoase, CMadoon, MDahl, ChristineUppsala University, Disciplinary Domain of Science and Technology, Biology, Department of Evolutionary Biology, Systematic Zoology.Kaiser, A
    Mosquitoes and their control2010Collection (editor) (Other academic)
  • 150.
    Beermann, Brandt, Bredal, Hovmark, Jaenson m.fl. (17 författare)
    Uppsala University, Teknisk-naturvetenskapliga vetenskapsområdet, Faculty of Science and Technology, Biology, Department of Evolutionary Biology. MEDICAL ENTOMOLOGY.
    Behandling av huvudlöss - rekommendationer1999In: Info från Läkemedelsverket, Vol. 10, no 5, p. 75-78Other (Other scientific)
1234567 101 - 150 of 1676
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