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Thesis (Ph. D.)--University of Adelaide, 1988. / Includes bibliographical references.

Thesis (Ph. D.)--University of Adelaide, Dept. of Crop Protection, 1995? / Errata inserted at leaf 162. Includes bibliographical references (leaves 136-161).

Thesis (Ph.D.)--Murdoch University, 2006. / Thesis submitted to the Division of Science and Engineering. Includes bibliographical references (leaves 164-182).

Thesis (doctoral)--Faculté des sciences de Paris, 1918 ((t. 1)). / Imprint varies. Reprinted from various periodicals. Includes bibliographical references and indexes.

Thesis (M.S.)--Oregon State University, 1994. / Includes mounted photographs. Typescript (photocopy). Includes bibliographical references (leaves 123-126). Also available on the World Wide Web.

Thesis (Ph. D.)--Leipzig. / Includes bibliographical references and index.

Thesis (M.S.)--University of Wisconsin--Madison, 1983. / Typescript. eContent provider-neutral record in process. Description based on print version record. Includes bibliographical references (leaves 61-70).

Thesis (Ph. D.)--University of Wisconsin--Madison, 1981. / Typescript. Vita. eContent provider-neutral record in process. Description based on print version record. Includes bibliographical references (leaves 139-146).

This thesis concerns the initial events leading to the induction of the phytoalexin response in the Phaseolus vulgaris L. - Colletotrichum lindemuthianum L. host - pathogen interaction The phytoalexin response is an expression of the resistance of the host to further pathogen invasion. The visible expression of the phytoalexin response is hypersensitive necrosis. One of the initial events leading to the induction of the phytoalexin response is thought to be the induction of the first enzyme leading to the synthesis of phenylpropanoid phytoalexins, namely L-phenylalanine ammonia-lyase (PAL). Standard methods for determination of PAL activities were found to lead to measurements of both phenylalanine amino-transferase (PAT) and PAL activities together. Further, PAT was found to have a higher affinity for L-phenylalanine than PAL. An isotopic assay was devised for the accurate estimation of PAT and PAL activities separately using a specific inhibitor of PAT, L-aspartic acid. These experiments were carried out in a whole (intact) plant system. A rapidly isolated cell and protoplast system wa.s specially devised for isolation of the pathogen cell wall constituents responsible for the induction of the phytoalexin response. Special care was taken to minimise mechanical damage in these systems by optimising methods of purification, viability and intactness. The pathogen cell wall component responsible for the induction of the phytoalexin response was found to be an asialoglycoprotein.