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  • 1
    Electronic Resource
    Electronic Resource
    Chromosomal evolution in Saccharomyces (2000)
    [s.l.] : Macmillian Magazines Ltd.
    Nature 405 (2000), S. 451-454 
    Details
    ISSN: 1476-4687
    Source: Nature Archives 1869 - 2009
    Topics: Biology , Chemistry and Pharmacology , Medicine , Natural Sciences in General , Physics
    Notes: [Auszug] The chromosomal speciation model invokes chromosomal rearrangements as the primary cause of reproductive isolation. In a heterozygous carrier, chromosomes bearing reciprocal translocations mis-segregate at meiosis, resulting in reduced fertility or complete sterility. Thus, chromosomal ...
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1038/35013058
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  • 2
    Electronic Resource
    Electronic Resource
    Whole-tree water transport scales with sapwood capacitance in tropical forest canopy trees (2003)
    Oxford, UK : Blackwell Science Ltd
    Plant, cell & environment 26 (2003), S. 0 
    Details
    ISSN: 1365-3040
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Biology
    Notes: The present study examines the manner in which several whole-tree water transport properties scale with species-specific variation in sapwood water storage capacity. The hypothesis that constraints on relationships between sapwood capacitance and other water relations characteristics lead to predictable scaling relationships between intrinsic capacitance and whole-tree behaviour was investigated. Samples of sapwood from four tropical forest canopy tree species selected to represent a range of wood density, tree size and architecture, and taxonomic diversity were used to generate moisture release curves in thermocouple psychrometer chambers, from which species-specific values of sapwood capacitance were calculated. Sapwood capacitance was then used to scale several whole-tree water transport properties determined from measurements of upper branch and basal sap flow, branch water potential, and axial and radial movement of deuterated water (D2O) injected into the base of the trunk as a tracer. Sapwood capacitance ranged from 83 to 416 kg m−3 MPa−1 among the four species studied and was strongly correlated with minimum branch water potential, soil-to-branch hydraulic conductance, daily utilization of stored water, and axial and radial movement of D2O. The species-independent scaling of several whole-tree water transport properties with sapwood capacitance indicated that substantial convergence in plant function at multiple levels of biological organization was revealed by a simple variable related to a biophysical property of water transport tissue.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1046/j.1365-3040.2003.01039.x
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  • 3
    Electronic Resource
    Electronic Resource
    Genetic interrelationship among species of the genus Zygosaccharomyces as revealed by small-subunit rRNA gene sequences (1994)
    New York, NY [u.a.] : Wiley-Blackwell
    Yeast 10 (1994), S. 871-881 
    Details
    ISSN: 0749-503X
    Keywords: Yeast ; Zygosaccharomyces ; 18S rRNA ; phylogeny ; direct sequencing ; Life and Medical Sciences ; Genetics
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Biology
    Notes: The phylogenetic interrelationship of species of the genus Zygosaccharomyces was examined by 18S rRNA gene sequencing. Comparative analysis of the sequence data revealed the genus to consist of a number of distinct subdivisions. The most prevalent species associated with food spoilage, Z. bailii, Z. bisporus and Z. rouxii, along with Z. mellis were found to form one subdivision. Zygosaccharomyces cidri and Z. fermentati formed a distinct species pair, as did Z. microellipsoides and Z. mrakii. Zygosaccharomyces florentinus formed a separate line displaying no specific relationship with any of the other Zygosaccharomyces species examined. Comparison with nine published ascosporogenous yeast 18S rRNA gene sequences showed that Z. microellipsoides and Z. mrakii were genealogically very close to Torulaspora delbrueckii (both displaying 99·8% 18S rRNA sequence similarity), raising the possibility that these two Zygosaccharomyces species should be moved to the genus Torulaspora.The topologies of trees derived from complete 18S rRNA gene sequences and from individual domains within the gene were compared and the implications of using partial sequence data for inferring phylogenetic relationships discussed.
    Additional Material: 5 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/yea.320100703
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    Paper (German National Licenses)
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