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  • About
  • The Global ETD Search service is a free service for researchers to find electronic theses and dissertations. This service is provided by the Networked Digital Library of Theses and Dissertations.
    Our metadata is collected from universities around the world. If you manage a university/consortium/country archive and want to be added, details can be found on the NDLTD website.
1

A biosystematic study of Athyrium pycnocarpon compared to Athyrium thelypeteroides

Cumo, Joseph M. 03 June 2011 (has links)
This research has examined the phylogenetic relationship between the questionable Athyrium pycnocarpon and the valid Athyrium thelypteroides. Classical taxonomic data were reported to illustrate the sources of confusion in the phylogenetic positioning of the fern in question. Chromatographic analyses of biochemical secondary constituents were reported. Descending paper chromatograms, ascending thinlayer chromatograms and cellulose-acetate electrophoretograms were the three analytical tools used to develop the secondary compounds. Ultraviolet light and ninhydrin visualization of the separated secondary constituents produced characteristic spotting patterns. On the basis of the close similarities of all patterns between the Athyrium pycnocarpon and Athyrium thelypteroides, it was concluded that the Athyrium pycnocarpon is unquestionably a member of the Athyrium complex.Ball State UniversityMuncie, IN 47306
2

A biosystematic comparison of Asplenium platyneuron and Athyrium pycnocarpon

Banks, James B. 03 June 2011 (has links)
This thesis has examined a long existing conflict between two ferns, Asplenium platyneuron and Athyrium pycnocarpon. The study included habitat, external and internal morphological characteristics, and biochemical analyses of the free amino acids. Major emphasis was placed upon vascular structure and arrangement in the stipes, roots, and rhizomes.Biochemically, the free amino acids were separated by one-dimensional descending paper chromatography. All areas investigated were either photographed or drawn and presented in the text of the thesis.Ball State UniversityMuncie, IN 47306

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