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Der Flugbrand der Sommergetreidesaaten und Massnahmen zur Bekämpfung dieses Pilzes in der landwirtschaftlichen Praxis ...Rose, Otto. January 1903 (has links)
Inaug.-Dis.--Rostock. / Includes bibliographical references.
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Influence of maternal tissue on loose smut infection of hybrid barley kernels and inheritance of Dorsett loose smut resistanceLoiselle, Roland, January 1956 (has links)
Thesis (Ph. D.)--University of Wisconsin--Madison, 1956. / Typescript. Vita. eContent provider-neutral record in process. Description based on print version record. Includes bibliographical references (leaves 80-82).
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A preliminary study on certain smuts of native grasses - AndropogoneaeHansing, Earl Dahl. January 1937 (has links)
Call number: LD2668 .T4 1937 H32
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Studies in the life history and physiology of certain smuts ...Sartoris, George Bartholomew, January 1900 (has links)
Thesis (Ph. D.)--University of Michigan, 1924. / Cover title. "Reprinted from the American journal of botany, XI ... December, 1924." Bibliography: p. 645-646.
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Somatic recombination in Ustilago hordei during the parasitic phase on barlyMegginson, Fiona Gertrude Ariel January 1973 (has links)
The question investigated in this study was whether or not somatic recombination can occur in Ustilago hordei whilst it is in the parasitic phase on barley. The investigation was carried out in two parts.
In the first and major part, barley seeds were inoculated artificially with mixtures of nutritionally deficient mutants of U. hordei. This was done in such a way that infection of the mature plants could only occur if at least one recombination event had taken place asexually, between at least two infective dikaryons, prior to teliospore formation. One smutted plant was found. Detailed analysis of the teliospores from this infection was carried out.
The second part of the study was designed to demonstrate that more than one infective dikaryon can simultaneously occupy the host. Again, mixtures of nutritionally deficient mutants were used to inoculate barley seeds but this time so that the origin of teliospores from any infection could be traced back to the parental types in the infective dikaryon.
It was concluded that somatic recombination can in fact occur whilst the fungus occupies the host tissue. / Medicine, Faculty of / Medical Genetics, Department of / Graduate
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Infection and development of Ustilago syntherismae in Digitaria ciliaris /Johnson, David Alan, January 1990 (has links)
Thesis (M.S.)--Virginia Polytechnic Institute and State University, 1990. / Vita. Abstract. Includes bibliographical references (leaves 44-48). Also available via the Internet.
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Identification, distribution and control of three smuts of spring barleySchafer, Lewis Allen. January 1948 (has links)
Call number: LD2668 .T4 1948 S34 / Master of Science
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Check List and Host Index for Arizona Smut FungiRhodes, Douglas C., Gilbertson, R. L. 02 1900 (has links)
No description available.
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Ultrastructure studies in ustilago hordei (Pers.) Lagerh.Robb, Elizabeth Jane January 1971 (has links)
A comparative light and electron microscope technique has been used to study the cytological changes accompanying teliospore (i.e. probasidium) germination in Ustilago hordei (Pers.) Lagerh. Special emphasis has been placed on determining the ultrastructural events involved in karyokinesls, especially meiosis, and cytokinesis.
The thesis is divided into five parts, of which the first is concerned with pre-germinal differentiation. The great increase
in microanatomical complexity which occurs during the pre-germinal stages is due largely to an increase in the amount of endoplasmic reticulum (ER) and to the formation of "primary hydration vacuoles." Evidently the nuclear envelope gives rise to the new ER which in turn dilates to form the vacuoles. This is accompanied by an increase in mitochondrial size and the development
of patches of patches of "flocculent cytoplasm."
Part II concerns the initiation and subsequent extension of the metabasidium (i.e. promycelium). Initiation involves the localized degradation of the inner spore wall, and deposition
of new wall material. The ER and spherosome-like bodies seem to be associated with these activities. Once spore wall rupture has occurred the structural basis of promycelial extension
is unknown but changes in the number, size, and distribution
of the spherosome-like organelles appear to have profound effects on the differentiation of the organism.
Septation, knee-joint formation, and budding are discussed in part III. Elaborate membrane complexes are associated with cross wall initiation. A membranous plate is completed across the cell before septal wall thickening begins. The initiation of sporidia (i.e. basidiospores) involves a localized plasti-cization of the promyoelial wall followed by degradation of the old wall and subsequent synthesis of new wall material. Bridge-formation results when two adjacent cells give rise to bud-like processes which grow together and subsequently fuse to produce a protoplasmic bridge.
The structure and activities of the metabasidial nuclei and their associated structures are discussed in part IV, Both meiosis and mitosis are unusual in that the two chromatin bodies apparently remain attached to the centriolar-kinetochore-equivalent and at least one of the chromatin bodies in attached to the nucleolus throughout the division cycle. The results are compatible with Brown and Stack's (1971) model for somatic nuclear division in some fungi.
Membrane complexes, resembling those which Initiate septa, form in association with prophase nuclei and maintain a specific relation with the nucleus throughout division. In part V the suggestion is made that these complexes form part of a mechanism controlling the positional relationships of nuclear and cell divisions in the promycelium. / Science, Faculty of / Botany, Department of / Graduate
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Studies on Zizania caduciflora Turez. and Ustilago esculenta P. Henn.Chan, Yuk-sim, 陳玉嬋 January 1973 (has links)
published_or_final_version / Botany / Doctoral / Doctor of Philosophy
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