School of Botany - Theses

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Type: PhD thesis × Start date: 1956 × End date: 1959 ×

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    Oxygen effects on photosynthesis
    Brittain, Edward George. (University of Melbourne, 1957)
    There are several distinct effects of oxygen on photosynthesis. The main preoccupation of the work leading up to this thesis has been with one of these, the inhibition of photosynthesis by high oxygen concentration. In order to place this topic in its proper perspective relative to the other known effects of oxygen on assimilation, the literature dealing with all of these effects has been reviewed in the first chapter. The other six chapters are devoted to accounts of experimental work directed towards the elucidation of the mechanism of the inhibition of photosynthesis by high oxygen concentration. Each of these chapters is complete in itself, consisting of the usual divisions of Methods, Results and Discussion. In addition, a short general discussion, summary and statement of conclusions are appended. The literature cited is collected at the end of the volume where it is arranged under chapter headings. The following symbols have been used: rP = rate of real photosynthesis aP = rate of apparent photosynthesis Rd = rate of dark respiration. Unless otherwise stated, the inhibition of photosynthesis due to oxygen is calculated on the basis of the rate in the lower or lowest oxygen concentration used, e.g., - Percentage inhibition (real) = (rPN2 - rPO2)/rPN2 x 100 and Percentage inhibition (apparent) + (aPair - aP02)/aPair x 100
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    Studies on the autecology of Eucalyptus regnans F.v.M.
    Ashton, David Hungerford ( 1956)
    An ecological study was commenced in 1949 of the E. regnans area in the Wallaby Creek catchment on the Hume Range 40 miles north- north-east of Melbourne, with the aim of elucidating some of the problems concerned with the regeneration of a remarkably well-preserved mature forest. The ramifications of this study have lead to the investigation of several aspects of the autecology of this species.