Search Results - (Author, Cooperation:D. E. Soltis)

Showing 1 - 8 results of 8, query time: 0.14s Refine Results
  1. 1
    Staff View
    Publication Date:
    2015-05-23
    Publisher:
    Nature Publishing Group (NPG)
    Print ISSN:
    0028-0836
    Electronic ISSN:
    1476-4687
    Topics:
    Biology
    Chemistry and Pharmacology
    Medicine
    Natural Sciences in General
    Physics
    Keywords:
    Angiosperms/*anatomy & histology/*physiology ; *Biological Evolution ; *Cold Climate ; *Ecosystem ; *Freezing ; Xylem/*anatomy & histology
    Published by:
    Latest Papers from Table of Contents or Articles in Press
  2. 2
    Staff View
    Publication Date:
    2015-05-23
    Publisher:
    Nature Publishing Group (NPG)
    Print ISSN:
    0028-0836
    Electronic ISSN:
    1476-4687
    Topics:
    Biology
    Chemistry and Pharmacology
    Medicine
    Natural Sciences in General
    Physics
    Published by:
    Latest Papers from Table of Contents or Articles in Press
  3. 3
    Staff View
    Publication Date:
    2011-04-12
    Publisher:
    Nature Publishing Group (NPG)
    Print ISSN:
    0028-0836
    Electronic ISSN:
    1476-4687
    Topics:
    Biology
    Chemistry and Pharmacology
    Medicine
    Natural Sciences in General
    Physics
    Keywords:
    Angiosperms/*classification/*genetics ; *Evolution, Molecular ; Genome, Plant/*genetics ; Genomics ; Phylogeny ; *Polyploidy
    Published by:
    Latest Papers from Table of Contents or Articles in Press
  4. 4
    Staff View
    Publication Date:
    2013-12-21
    Publisher:
    American Association for the Advancement of Science (AAAS)
    Print ISSN:
    0036-8075
    Electronic ISSN:
    1095-9203
    Topics:
    Biology
    Chemistry and Pharmacology
    Computer Science
    Medicine
    Natural Sciences in General
    Physics
    Keywords:
    Contig Mapping/*methods ; *Genome, Plant ; In Situ Hybridization, Fluorescence ; Sequence Analysis, DNA/*methods ; Tracheobionta/*genetics
    Published by:
    Latest Papers from Table of Contents or Articles in Press
  5. 5
    Staff View
    Publication Date:
    2013-12-24
    Publisher:
    Nature Publishing Group (NPG)
    Print ISSN:
    0028-0836
    Electronic ISSN:
    1476-4687
    Topics:
    Biology
    Chemistry and Pharmacology
    Medicine
    Natural Sciences in General
    Physics
    Keywords:
    Angiosperms/*anatomy & histology/*physiology ; *Biological Evolution ; *Cold Climate ; *Ecosystem ; *Freezing ; Likelihood Functions ; Phylogeography ; Plant Leaves/anatomy & histology/physiology ; Seeds/physiology ; Time Factors ; Wood/anatomy & histology/physiology ; Xylem/*anatomy & histology/physiology
    Published by:
    Latest Papers from Table of Contents or Articles in Press
  6. 6
    Latest Papers from Table of Contents or Articles in Press
  7. 7
    Soltis, P. S. ; Soltis, D. E.
    Springer
    Published 1992
    Staff View
    ISSN:
    1615-6110
    Keywords:
    Ferns ; Dryopteridaceae ; Polystichum ; rDNA ; restriction site analysis
    Source:
    Springer Online Journal Archives 1860-2000
    Topics:
    Biology
    Notes:
    Abstract Restriction site variation in the nuclear 18S–25S ribosomal RNA genes (rDNA) was analyzed hierarchically in a species complex in the fern genusPolystichum. Two distinct rDNA repeat types were present in all individuals ofPolystichum examined. No variation was detected among individuals within a population ofP. munitum, among populations ofP. munitum orP. imbricans, or among the six diploid species ofPolystichum from North America, including the circumborealP. lonchitis. The identity of rDNA repeats across all six North American species ofPolystichum may reflect an overall similarity of the nuclear genomes of these species, an observation supported by isozyme data as well. However, this nuclear similarity contrasts sharply with the highly divergent chloroplast genomes of these six species. The conservative nature of the rDNA inPolystichum also is in contrast to the much more variable rDNAs of most angiosperms investigated. Perhaps the tempo and mode of evolution of rDNA in ferns differ from those of angiosperms; however, the data base for fern rDNA is very small. Furthermore, the number of repeat types per individual is consistent with a diploid, rather than polyploid, condition despite the high chromosome number (n = 41) of these plants, although homogenization of multiple, divergent rRNA genes cannot be disproven.
    Type of Medium:
    Electronic Resource
    URL:
    Articles: DFG German National Licenses
  8. 8
    Soltis, D. E. ; Soltis, P. S. ; Kuzoff, R. K. ; Tucker, T. L.
    Springer
    Published 1992
    Staff View
    ISSN:
    1615-6110
    Keywords:
    Angiosperms ; Saxifragaceae ; Tiarella trifoliata ; Intraspecific cpDNA variation ; biogeography ; phylogeography
    Source:
    Springer Online Journal Archives 1860-2000
    Topics:
    Biology
    Notes:
    Abstract Tiarella trifoliata comprises varietieslaciniata, trifoliata, andunifoliata, and is distributed from southeastern Alaska to northern California. We analyzed restriction site variation of chloroplast DNA (cpDNA) using 23 endonucleases in 76 populations representing the entire geographic range of the species and the three recognized varieties. We also employed comparative restriction site mapping of PCR-amplified chloroplast DNA fragments using 16 restriction endonucleases. This species exhibits low cpDNA restriction site variation. No differentiation is evident among varieties of this species based on cpDNA data; some plants of each variety were characterized by each of the two major cpDNA types detected. The two major cpDNA clades, which differ by only a single restriction site mutation, are geographically structured. A northern clade comprises populations from Alaska to central Oregon; most populations analyzed from southern Oregon and California form a southern clade. Populations that possess the typical northern cpDNA type also occur disjunctly to the south at high elevations in the Siskiyou—Klamath Mountain area of southern Oregon and northern California. Conversely, the southern cpDNA type is found disjunctly to the north in the Olympic Peninsula of Washington. Both geographic areas characterized by disjunct cytoplasms are considered glacial refugia.Tiarella trifoliata joins two other species,Tolmiea menziesii andTellima grandiflora, in having well-demarcated northern and southern cpDNA lineages. All three species have similar life-history traits and geographic distributions. We suggest that glaciation may have played a major role in the formation of the cpDNA discontinuities present in these three taxa. The pronounced relationship between cpDNA variation and geographic distribution suggests the potential applicability of “intraspecific phylogeography” to plants via the analysis of intraspecific cpDNA variation. These three examples also join a rapidly growing data base which indicates that cytoplasms are often geographically structured within species and species complexes.
    Type of Medium:
    Electronic Resource
    URL:
    Articles: DFG German National Licenses