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Certain factors affecting the rate of honeydew deposition from two species of aphids, Toxoptera graminum (Rond.), and Therioaphis maculata (Buck.) while feeding on host plants wheat, barley and alfalfaMaxwell, Fowden G. January 1958 (has links)
Call number: LD2668 .T4 1958 M38
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Chemical nature of anthracnose resistance in cucurbitsBredenberg, Anna Cecilia Mathilda. January 1961 (has links)
Call number: LD2668 .T4 1961 B74
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The inheritance of Alternaria leaf spot resistance in muskmelon Cucumis melo L.Suzuki, Yasuo. January 1965 (has links)
Call number: LD2668 .T4 1965 S968 / Master of Science
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Movement of radioactive indoleacetic acid and tryptophan in plants infected with Meloidogyne incognitaMiller, Stuart Melvin, 1942- January 1970 (has links)
No description available.
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The effects of a polyphenolpolyphenoloxidase system on the infectivity of cowpea chlorotic mottle virus-ribonucleic acid.Woods, Thomas L. 01 January 1972 (has links) (PDF)
No description available.
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Food plants of Melanoplus femurrubrum femurrubrum (Degeer) in the bluestem grass region of KansasJantz, Orlo Kenneth. January 1962 (has links)
Call number: LD2668 .T4 1962 J36
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Biochemical characterization of the polygalacturonase inhibiting protein from cotton13 August 2012 (has links)
M.Sc. / Plants have evolved a complex array of biochemical pathways that enable them to recognise and respond to signals from the environment. At present, little is known about the signal transduction pathways that are activated during a plant's response to attack by a pathogen, although this knowledge is central to our understanding of disease susceptibily and resistance. A common form of plant resistance is the restriction of pathogen proliferation to a small zone surrounding the site of infection. In many cases, this restriction is accompanied by localized death of host tissues, known as the hypersensitive response. In addition to local defense responses, many plants respond to infection by activating defenses in uninfected parts of the plant. As a result, the entire plant is more resistant to a secondary infection. This systemic acquired resistance can persist for several weeks or more and often confers crossresistance to unrelated pathogens. Fungal polygalacturonases (PGs) catalyze the fragmentation and the solubilisation of the homogalacturonan in the plant cell wall. These enzymes might have important functions during plant colonization by a fungus. PGs have also been shown to activate plant defense responses, likely because they generate oligogalacturonides with elicitor activity from the plant cell wall. A polygalacturonase inhibiting protein (PGIP), found in the plant cell wall of many plants, forms a specific complex with fungal PGs and favours the accumulation of elicitor-active oligogalacturonides in vitro. An agarose diffusion assay was used to screen the extracts from Verticillium dahliae for PG activity and ensuing inhibition by purified cotton PGIP. Quantitative determination of differences in polygalacturonase activity in the extracts were performed using a reducing sugar assay. There may be more than one isoform of PG present since the polygalacturonases produced by fungi are likely to be to a mixture of exo- and endo-PGs. Polygalacturonase was therefore isolated from 18-day-old culture filtrates of V. dahliae. The enzyme was partially purified by means of ammonium sulphate precipitation and gel chromatography. The band responsible for PG activity was identified and characterized, having a molecular weight of approximately 28-31 kDa, and a pl of 5.1 - 5.9. Kinetic studies indicate a Km of 0.33% and V,„,,of 0.85 pmoles reducing units / min. A commercial preparation of endo-PG from Aspergillus niger was used as a control. This endo-PG had a molecular weight of 68 kDa and a pl point of 3.6 and 5.1, suggesting there were at least two isoforms of endo-PG present. Kinetic studies indicate a K m of 0.33% and V,,„ of 1.07 gmoles reducing units / min.
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The effect of some micronutrients on the resistance of highland bentgrass to fall armywormsWatson, Stephen Lawrence January 2011 (has links)
Digitized by Kansas Correctional Industries
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Comparative analysis of disease resistance related genes in rice. / CUHK electronic theses & dissertations collectionJanuary 2004 (has links)
by Zeng Naiyan. / "December 2004." / Thesis (Ph.D.)--Chinese University of Hong Kong, 2004. / Includes bibliographical references (p. 185-213) / Electronic reproduction. Hong Kong : Chinese University of Hong Kong, [2012] System requirements: Adobe Acrobat Reader. Available via World Wide Web. / Mode of access: World Wide Web. / Abstracts in English and Chinese.
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Novel inducible phytochemical defences against plant parasitic nematodes / Imelda Rizalina Soriano.Soriano, Imelda Rizalina January 2004 (has links)
"August 2004" / Bibliography: leaves 146-169. / vi, 169 leaves : ill, (some col.), photos (col.) ; 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, School of Agriculture and Wine, Discipline of Plant and Pest Science, 2004
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