Thesis (Ph.D.) -- University of Western Sydney, 2004. / A thesis submitted in fulfillment of the requirements for the degree of Doctor of Philosophy. Includes bibliography.

Call number: LD2668 .T4 1965 S859 / Master of Science

LD2668 .T4 1949 S5 / Master of Science

Typescript / 298 leaves : ill. / Title page, contents and abstract only. The complete thesis in print form is available from the University Library. / The accumulation, chemical composition, and distribution of storage nitrogen in young peach trees (Golden queen on Elberta rootstock), and the importance of this stored nitrogen for new growth, were investigated in this thesis. In addition, the metabolic stability of constituents of the storage nitrogen of dormant peach trees was studied. / Thesis (Ph.D.)--University of Adelaide, Dept. of Plant Physiology, Waite Agricultural Research Institute, 1966

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Thesis (Ph. D.)--University of Hawaii at Manoa, 1995. / Includes bibliographical references (leaves 204-221). / Microfiche. / xvi, 221 leaves, bound ill. 29 cm

Thesis (Ph. D.)--University of Wisconsin--Madison, 1981. / Typescript. Vita. Includes bibliographical references.

Thesis (Ph. D.)--University of Wisconsin--Madison, 1982. / Typescript. Vita. eContent provider-neutral record in process. Description based on print version record. Includes bibliographical references (leaves 211-227).

Haploid plants are potentially valuable for the breeding of many crops particularly those with long reproductive cycles. In this investigation an attempt was made to determine the requirements of androgenesis of peach and cherry, a technique which has been used to produce large numbers of haploids in other species. A procedure used successfully with tobacco was verified. A preliminary survey of apple, cranberry and rose showed that they do not have the same requirements as tobacco. In most experiments with cherry and peach immature pollen was used. However the lack of differential responces of pollen to treatment made interpetation difficult. Hence responces of anthers and the growth of calli from somatic flower parts was used to assess different treatments instead of pollen growth. Calli emerged from cherry anthers when anthers were cultured on Nitsch's medium containing naphthalene acetic acid (NAA) and coconut milk and incubated in the dark at 30°C. Because these calli contained both diploid and tetraploid cells and because of the lack of abnormal pollen development in the anthers it was concluded that the calli probably originated from anther connective tissue rather than pollen. In experiments with mature cherry pollen several different types of abnormal pollen growth were observed including multicellular pollen grains. A comparison of the requirements for species in which androgenesis has been demonstrated is discussed. In some species components making up the requirements appear to form a pattern which if verified by reports from other species will be valuable in future investigations. Suggestions are made as to the direction which further investigations of the requirements for androgenesis should take. / Land and Food Systems, Faculty of / Graduate

No description available.