Thesis (Ph. D.)--Hong Kong University of Science and Technology, 2003. / Includes bibliographical references (leaves 197-236). Also available in electronic version. Access restricted to campus users.

Thesis (Ph.D.) -- University of Adelaide, Department of Genetics, 1977.

Thesis (Ph. D.)--University of Wisconsin--Madison, 1954. / Typescript. Vita. eContent provider-neutral record in process. Description based on print version record. Includes bibliographical references (leaves 68-69).

Thesis (M.Phil.)--Hong Kong University of Science and Technology, 2005. / Includes bibliographical references (leaves 95-100). Also available in electronic version.

The inhibitory effects of NaCl, L- and D-asparagine, and asparagine substrate analogs, beta-aspartyl hydroxamate (AAH) and albizziin, alone or in combination on Columbia Arabidopsis seed germination and seedling survival were characterized under aseptic conditions. Germination on an agar medium supplemented with inorganic nutrients was prevented by 200 mM NaCl, 20 mM L-asparagine, 60 mM D-asparagine, 1.4 mM AAH, or 8 mM albizziin. Established seedlings were generally more tolerant to these chemicals than germinating seeds. Exogenous L- and D-asparagine partly reversed the inhibitory effects of NaCl on seed germination. L-asparagine also partly reversed AAH inhibition of germination. A M2 seed bank was created from the self-pollinated progeny of ethyl methane sulfonate treated seeds. Arabidopsis mutants having increased tolerance to NaCl and AAH, but not albizziin, were successfully selected from this seed bank.

No description available.

No description available.

This project was designed to investigate the impact of natural levels of ultraviolet-B radiation on the genomic mutation rate in Arabidopsis thaliana. UV-B radiation is a known mutagen, but plants may have evolved mechanisms to cope with any genomic damage induced by routine exposure to this radiation. In an attempt to determine whether the genomic mutation rate in a plant species is elevated in the presence of UV-B, two eleven generation mutation accumulation studies were preformed. One study incorporated levels of UV-B similar to that encountered on a clear mid-summer's day, while the other was performed in the absence of this mutagen. Mutation rate estimates, obtained primarily from maximum likelihood analysis of phenotypic data, were not significantly greater than zero, both in the presence and absence of UV-B. No evidence was found to support the notion that the genomic mutation rate is increased by exposure to natural levels of UV-B.

viii, 111 leaves : ill., tables ; 30 cm. / Title page, contents and abstract only. The complete thesis in print form is available from the University Library. / Thesis (Ph.D.)--University of Adelaide, Dept. of Genetics, 1977

viii, 111 leaves : ill., tables ; 30 cm. / Title page, contents and abstract only. The complete thesis in print form is available from the University Library. / Thesis (Ph.D.)--University of Adelaide, Dept. of Genetics, 1977