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Dissertations / Theses on the topic 'Fungal diseases of plants'

Author: Grafiati

Published: 4 June 2021

Last updated: 29 July 2024

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1

Qongqo, Axola. "Introduction pathways of phytopathogenic fungi and their potential role in limiting plant invasions: the case of Banksia spp. (Proteaceae) in the Cape Floristic Region." Cape Peninsula University of Technology, 2018. http://hdl.handle.net/20.500.11838/2859.

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Thesis (Master of Conservation Science)--Cape Peninsula University of Technology, 2018.<br>Introduction pathways of fungal pathogens in South Africa are far less quantified in the literature than those for plants, animals and human infectious diseases. Phytopathogens continue to be introduced to South Africa via several pathways at an unprecedented rate. A number of these species pose a significant threat to South African ecosystems and biodiversity. Despite this, fungal pathogens could also be beneficial when they are used as bio-control agents to control alien invasive plant species. Neverth

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2

Mohd, Salim @. Halim Jamilah. "Tree resistance and responsiveness to mechanical damage and fungal pathogens in dipterocarp forest of Sabah, Malaysia." Thesis, University of Aberdeen, 2009. http://digitool.abdn.ac.uk:80/webclient/DeliveryManager?pid=130838.

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A survey of dipterocarp forest in four sites revealed that the incidence of stem canker was relatively low but high localized incidences were recorded. No consistent association was obtained between the presence of mechanical damage and cankers. Cankers occurred more frequently on dipterocarps and less frequently on euphorbs. Field studies and experimental manipulations were used to compare sapling resistance and responsiveness to wounding and stem breakage in relatively nutrient-rich, alluvial forest and relatively nutrient-poor, sandstone ridge forest. Species found on sandstone ridges showe

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3

Knowles, Cindy-Lee. "Synergistic effects of mixtures of the kresoxim-methyl fungicide and medicinal plants extracts in vitro and in vivo against Botrytis Cinerea." Thesis, University of the Western Cape, 2005. http://etd.uwc.ac.za/index.php?module=etd&amp.

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The fungus Botrytis cinerea is an opportunistic pathogen on a wide variety of crops, causing disease known as grey mould through infections via wounds or dead plant parts. Synthetic fungicides for controlling this disease are fast becoming ineffective due to the development of resistance. This, coupled with consumers world wide becomng increasingly conscious of potential environment and health problems associated with the build up of toxic chemicals, (particularly in food products), have resulted in pressure to reduce the use of chemical pesticide volumes as well as its residues. An emerging a

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4

Cox, James Alexander. "Modelling long-distance airborne dispersal of fungal spores and its role in continental scale plant disease epidemics." Thesis, University of Cambridge, 2015. https://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.708472.

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5

Pakela, Yolisa Patronella. "Interaction between Colletotrichum dematium and cowpea." Thesis, Pretoria: [s.n.], 2003. http://upetd.up.ac.za/thesis/available/etd-09022005-102127/.

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6

Arthur, Fareed Kow Nanse. "Defense responses to fungal challenge in alfalfa (medicago sativa L.) plants and tissue cultures." Thesis, University of Nottingham, 1994. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.385239.

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7

Wennström, Anders. "Systemic fungal diseases in natural plant populations." Doctoral thesis, Umeå universitet, 1993. http://urn.kb.se/resolve?urn=urn:nbn:se:umu:diva-96888.

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The purpose of this thesis was to study interactions between systemic fungal diseases and perennial plants. Using the systemic rust Puccinia minussensis on the host plant Lactuca sibirica, and the rust Puccinia pulsatillae on the host plant Pulsatilla pratensis, this thesis focused on: (i) the effects of systemic diseases on their hosts (ii) host and pathogen responses to abiotic factors, (iii) the importance of life history strategies for understanding host-pathogen interactions, and (iv) the evolutionary consequences of living in close associations. Results of greenhouse experiments showed t

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8

McGovern, Kristen B. "Evaluation of Potential Organic Controls of Mummy Berry Disease Affecting Lowbush Blueberry in Maine." Fogler Library, University of Maine, 2007. http://www.library.umaine.edu/theses/pdf/McGovernKB2007.pdf.

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9

Truter, Mariette. "Etiology and alternative control of potato rhizoctoniasis in South Africa." Pretoria : [s.n.], 2005. http://upetd.up.ac.za/thesis/available/etd-04122005-112047.

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10

Waters, Ormonde Dominick Creagh. "Metabolism and infection in the Stagonospora nodorum-wheat pathosystem /." Murdoch University Digital Theses Program, 2008. http://wwwlib.murdoch.edu.au/adt/browse/view/adt-MU20090409.123159.

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11

Lardner, Richard. "Early diagnosis and detection of Eutypa dieback of grapevines." Title page, table of contents and abstract only, 2003. http://hdl.handle.net/2440/37969.

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Eutypa dieback of grapevines, caused by Eutypa lata, is a major cause of reduced longevity in vineyards worldwide. The fungus grows in the woody tissue of infected vines, producing translocatable toxins that cause foliar symptoms of the disease. By the time foliar symptoms are evident the pathogen may have become well established in the vine. One aim of this study was to develop DNA markers to allow rapid reliable identification of E. lata and to detect the pathogen in infected wood. The second aim was to analyse secondary metabolite production by E. lata in order to gain information on the co

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12

Kimani, Esther Wairimu. "Serological detection of Didymella lycopersici (Kleb.)." Thesis, University of British Columbia, 1990. http://hdl.handle.net/2429/29190.

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Polyclonal antisera produced against spores, soluble protein and the whole mycelium fractions of Didymella lycopersici reacted with the homologous and heterologous antigens. The most sensitive antiserum was that raised against the whole mycelium, the soluble protein and the spore, in decreasing order of sensitivity. Using the antiserum raised against the whole mycelium it was possible to detect D. lycopersici on diseased plants and infested seeds. Cross reactivity was observed between the antisera produced to D. lycopersici and D. applanata, D. bryoniae and other tomato fungal pathogens includ

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13

Das, Gupta Sourish. "Studies on some foliar fungal diseases of young, tea (Camellia sinensis L O Ktze) plants." Thesis, University of North Bengal, 2004. http://hdl.handle.net/123456789/1075.

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14

Lombard, Lorenzo. "Fungal diseases in Eucalyptus and Acacia nurseries in South Africa." Diss., University of Pretoria, 2004. http://hdl.handle.net/2263/24484.

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Studies presented in this dissertation highlight the importance of fungal pathogens in forestry nurseries in South Africa. Both Acacia meamsii seedlings and Eucalyptus hybrid cuttings are shown to be affected by important nursery pathogens. Chapter one presents an evaluation of the potential importance of pathogens to Eucalyptus hedge plants maintained in hydroponics. Hydroponics is a new technology being used in South African forest nurseries, which allows for the rapid establishment of Eucalyptus hedge plants. However, no information is available on pathogens affecting Eucalyptus in hydropon

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15

Herrmann, Revital. "Characterization and efficacy testing of novel antifungal peptides in transgenic rice." Access to citation, abstract and download form provided by ProQuest Information and Learning Company; downloadable PDF file 2.08 Mb., 254 p, 2006. http://gateway.proquest.com/openurl?url_ver=Z39.88-2004&res_dat=xri:pqdiss&rft_val_fmt=info:ofi/fmt:kev:mtx:dissertation&rft_dat=xri:pqdiss:3220793.

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16

Lowe, Rohan George Thomas. "Sporulation of Stagonospora nodorum /." Access via Murdoch University Digital Theses Project, 2006. http://wwwlib.murdoch.edu.au/adt/browse/view/adt-MU20071101.221432.

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17

Ntushelo, Khayalethu. "Comparative studies on genetic variability and fungicide resistance in Tapesia yallundae." Thesis, Stellenbosch : Stellenbosch University, 1998. http://hdl.handle.net/10019.1/55834.

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Thesis (MScAgric)--Stellenbosch University, 1998.<br>ENGLISH ABSTRACT: Eyespot is an important disease of spring wheat (Triticum aestivum L.). Four species of Ramulispora are associated with this disease, of which Tapesia yallundae and T. acuformis. are common. This thesis investigates the broader subjects of genetic variability, reproductive dynamics and fungicide resistance in Tapesia yallundae. Each of the chapters treats specific but related topics. T. yallundae, which is the only species thus far reported from South Africa, has been associated with yield losses of up to 50%. To ena

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18

Wicks, T. J. "Phytophthora crown rot of almond and cherry trees : pathogens, rootstock and scion susceptib[i]lity and control /." Title page, table of contents and summary only, 1987. http://web4.library.adelaide.edu.au/theses/09PH/09phw637.pdf.

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19

Denman, Sandra. "Botryosphaeria diseases of proteaceae." Thesis, Stellenbosch : Stellenbosch University, 2002. http://hdl.handle.net/10019.1/52721.

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Dissertation (PhD (Agric))--University of Stellenbosch, 2002.<br>ENGLISH ABSTRACT: Fungi belonging to the genus Botryosphaeria are heterotrophic micromycetes that can be pathogens on woody plants. They cause serious, and in some cases devastating losses to crops through leaf necrosis, stem cankers and plant death. The Proteaceae cut-flower industry in South Africa accounts for 70% of the national cut-flower enterprise. Botryosphaeria diseases are a major impediment to production and trade of Proteaceae and there is an urgent need to investigate the etiology, epidemiology and control of t

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20

Weldegebriel, Kibrom Asmerom. "Synthetic studies on the spiroacetal moiety of Stenocarpin, a metabolite of Diplodia maydis /." Diss., Access to E-Thesis, 2003. http://upetd.up.ac.za/thesis/available/etd-09082005-122736/.

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21

Groenewald, Michelle. "Characterization and control of Phaeomoniella chlamydospora in grapevines." Thesis, Stellenbosch : Stellenbosch University, 2000. http://hdl.handle.net/10019.1/51650.

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Thesis (MScAgric)--University of Stellenbosch, 2000.<br>ENGLISH ABSTRACT: Petri grapevme decline, also known as black goo, slow die-back and Phaeoacremonium grapevine decline, causes significant losses of young vines worldwide. Species of Phaeoacremonium, Phaeomoniella chlamydospora and related genera are associated with this grapevine disease. This study investigates the Phaeoacremonium-complex and Phaeomoniella chlamydospora, focussing on the species isolated from grapevines. Fungicide sensitivity of Pa. chlamydospora and the possibility of employing molecular techniques for the detec

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22

Du, Preez Izak Frederik. "Infection pathways of Botrytis cinerea on selected wine grape cultivars." Thesis, Stellenbosch : Stellenbosch University, 2002. http://hdl.handle.net/10019.1/52889.

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Thesis (MScAgric)--University of Stellenbosch<br>ENGLISH ABSTRACT: An understanding of the infection pathways of Botrytis cinerea in grape bunches will help to combat this devastating pathogen of grape. Many studies have been done to determine the possible infection pathways of B. cinerea. Most of these studies made use of artificial inoculations that deposit groups of conidia on the plant surface. The deposition of clusters of conidia is not a common phenomenon in nature. The aim of this study was to investigate the infection pathways of (i) naturally- as well as (ii) artificially inocu

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23

Tan, Kar-Chun. "Role of signal transduction in the pathogenicity of Stagonospora nodorum on wheat." Thesis, Tan, Kar-Chun (2007) Role of signal transduction in the pathogenicity of Stagonospora nodorum on wheat. PhD thesis, Murdoch University, 2007. https://researchrepository.murdoch.edu.au/id/eprint/425/.

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The fungus Stagonospora nodorum is the causal agent of leaf and glume blotch disease on wheat and is an emerging model for the study of the interaction between plants and necrotrophic fungal pathogens. Signal transduction plays a critical role during infection by allowing the pathogen to sense and appropriately respond to environmental changes. The role of signal transduction in the pathogenicity of S. nodorum was analysed by the targeted inactivation of genes encoding a G[alpha] subunit (Gna1) and a mitogen-activated protein kinase (Mak2). Strains carrying the inactivated genes were impaired

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24

Tan, Kar-Chun. "Role of signal transduction in the pathogenicity of Stagonospora nodorum on wheat." Tan, Kar-Chun (2007) Role of signal transduction in the pathogenicity of Stagonospora nodorum on wheat. PhD thesis, Murdoch University, 2007. http://researchrepository.murdoch.edu.au/425/.

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The fungus Stagonospora nodorum is the causal agent of leaf and glume blotch disease on wheat and is an emerging model for the study of the interaction between plants and necrotrophic fungal pathogens. Signal transduction plays a critical role during infection by allowing the pathogen to sense and appropriately respond to environmental changes. The role of signal transduction in the pathogenicity of S. nodorum was analysed by the targeted inactivation of genes encoding a G[alpha] subunit (Gna1) and a mitogen-activated protein kinase (Mak2). Strains carrying the inactivated genes were impaired

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25

Halleen, Francois. "Characterisation of Cylindrocarpon spp. associated with black foot disease of grapevine." Thesis, Stellenbosch : Stellenbosch University, 2005. http://hdl.handle.net/10019.1/21454.

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Dissertation (PhD (Agric))--University of Stellenbosch, 2005.<br>ENGLISH ABSTRACT: During the past few years a drastic reduction has been noted in the survival rate of grafted grapevines in nurseries, as well as in young vineyards in the Western Cape Province of South Africa. Circumstantial evidence suggested that Cylindrocarpon spp., which cause black foot disease of grapevine, were associated with this decline. Black foot disease of grapevine is a relatively new, and as yet poorly known disease affecting vines in various countries where grapevines are cultivated. Primary aims of this re

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26

De, Beer Abre. "Overexpression and evaluation of an antimicrobial peptide from Heuchera sanguinea (Hs-AFP1) for inhibition of fungal pathogens in transgenic tabacco." Thesis, Stellenbosch : Stellenbosch University, 2002. http://hdl.handle.net/10019.1/52983.

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Thesis (MSc)--University of Stellenbosch, 2002.<br>ENGLISH ABSTRACT: Seed germination is the most vulnerable time in a plant's life cycle, since the thick protective seed coat ruptures and the moist and humid soil environment not only favours seed germination, but also the growth and development of plant pathogens. Infection of plant seeds during germination, however, is the exception rather than the rule. Plant seeds have - - -developed a--cemplex preformed defense mechanism that includes anttfungal agents thatdiffuse into the surrounding environment to form a protective layer around th

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27

Horner, W. Elliott. "Etiologic studies of Verticicladiella procera Kendr. in pine Christmas trees." Diss., Virginia Polytechnic Institute and State University, 1985. http://hdl.handle.net/10919/54295.

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Colonization of Pine Christmas trees by Verticicladiella procera Kendr. causes Procera root disease. Little is presently known regarding the pattern and effects of fungal development within colonized trees. The present studies were undertaken to elucidate the developmental pattern of the fungus in colonized trees, to gather information on possible mechanisms and physiological effects of disease development, and to explore the relationship between V. procera and other, well documented bluestain fungi. The presence of cellulose was demonstrated in the cell walls of X. procera, indicating the pro

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28

Gosbee, Melinda Jane. "Water deficit stress and the colonisation of mango plant tissue by the stem end rot fungus, Botryospaeria dothidea /." St. Lucia, Qld, 2003. http://www.library.uq.edu.au/pdfserve.php?image=thesisabs/absthe17490.pdf.

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29

Mauk, Peggy Ann. "THE INTERACTIONS OF TRICHODERMA HAMATUM, PYTHIUM APHANIDERMATUM, AND CUCUMIS SATIVUS AS INFLUENCED BY CARBON DIOXIDE AND OXYGEN CONCENTRATIONS (CONTROLLED ATMOSPHERES, BIOLOGICAL CONTROL, SOIL ATMOSPHERES)." Thesis, The University of Arizona, 1985. http://hdl.handle.net/10150/275388.

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30

McCafferty, Heather Ross Kennedy. "Identification of genes involved in pathogenesis of the rice blast fungus, Magnaporthe grisea." Thesis, University of Exeter, 1997. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.388625.

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31

Volkmann, Anette (Anette Sigrid). "Suppression of Botrytis cinerea by antagonists in living, moribund and dead grapevine tissue." Thesis, Stellenbosch : Stellenbosch University, 2001. http://hdl.handle.net/10019.1/52472.

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Thesis (MScAgric)--University of Stellenbosch, 2001.<br>ENGLISH ABSTRACT: Several attempts have been made to reduce Botrytis cinerea grey mould in vineyards and in storage by means of biological control. However, the so called "silver bullet" approach in utilising a single antagonist, has its limitations when compared with synthetic fungicides. Often the antagonist has a limited spectrum of activity and the duration of its effectiveness is less than that provided by synthetic fungicides. Furthermore, antagonists are more likely to be effective in preventing initial infection rather than

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32

Mostert, Lizel. "The characterization and control of Phomopsis cane and leaf spot on vine." Thesis, Stellenbosch : Stellenbosch University, 2000. http://hdl.handle.net/10019.1/51945.

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Thesis (MScAgric.)--Stellenbosch University, 2000.<br>ENGLISH ABSTRACT: Phomopsis cane and leaf spot disease of grapevine is an economically important disease in many of the vine-growing areas of the world. Four different Phomopsis spp. have previously been associated with this disease. The present study investigates the taxonomic significance of the different taxa found on grapevines in South Africa, as well as the endophytic growth and fungicide sensitivity of Phomopsis viticola isolates. The thesis is compiled of several different parts, which deal with specific, but related topics, a

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33

Mustafa, Bakray Nur Aqilah Binti. "Structure of root associated and soil fungal and bacterial communities in Southeast Asia tropical forest." Thesis, University of Aberdeen, 2018. http://digitool.abdn.ac.uk:80/webclient/DeliveryManager?pid=239153.

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The tropical rainforest has interested ecologists for hundreds of years because of its vast species diversity. The distribution and establishment of trees is related to soil properties and rootassociated microorganisms. The coexistence of hyper-diverse plant communities in tropical rainforests has resulted in associations being formed with belowground communities, mycorrhizas (particularly arbuscular mycorrhizal (AM), ectomycorrhizas (ECM)) and root associated bacterial communities. The rapid deforestation in Southeast Asia is causing the loss of the dominant and important tree species belongi

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34

Campbell, Graham F. (Graham Findlay). "Genetics of pathogenicity in Pyrenophora leaf diseases of barley." Thesis, Stellenbosch : Stellenbosch University, 2001. http://hdl.handle.net/10019.1/52286.

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Dissertation (PhD(Agric)) -- University of Stellenbosch, 2001.<br>ENGLISH ABSTRACT: Net blotch of barley, caused by Pyrenophora teres, is one of the most important diseases of this cereal in the south Western Cape Province of South Africa. This fungus exists as two different types (forms), namely a nettype and a spot-type that are distinguished by differential symptom expression on barley leaves. Based on this specific plant pathological difference a series of studies of agricultural importance were executed to investigate the effects of sexual recombination between these two types. In

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35

Wilmot, Michelle. "Inhibition of phytopathogenic fungi on selected vegetable crops by catechins, caffeine, theanine and extracts of Camellia sinensis (L.) O. Kuntze." Diss., Pretoria : [s.n.], 2007. http://upetd.up.ac.za/thesis/available/etd-09142007-154007.

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36

Butterworth, Lisa A. "Interactions of the pathogen leptosphaeria maculans (Desm.) Ces and de Not. and Brassica napus." Thesis, University of East Anglia, 1998. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.267462.

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37

Gracia, Javier. "Lettuce stunt : effect of Pythium populations and interactions between Pythium tracheiphilum and nematodes." Thesis, McGill University, 1989. http://digitool.Library.McGill.CA:80/R/?func=dbin-jump-full&object_id=59387.

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This research has focused on the determination of natural populations in the fields, the effect of different inoculum densities on lettuce growth and a study of the association of this fungus with two nematodes (Pratylenchus penetrans Cobb and Meliodogyne hapla Chitwood). Under conditions of artificial infestation of soil the results were satisfactory, but in trials with naturally infested soil the fungus could not be detected. The effect of different inoculum densities was measured at different stages of growth, and only in those plants inoculated 2 weeks after seeding were differences signif

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Engelbrecht, Rene. "The role of the mediterranean fruit fly, Ceratitis capitata, in Botrytis bunch rot of grape." Thesis, Stellenbosch : Stellenbosch University, 2002. http://hdl.handle.net/10019.1/53168.

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Thesis (MScAgric)--University of Stellenbosch, 2002.<br>ENGLISH ABSTRACT: Botrytis bunch rot of grape is caused by Botrytis cinerea Pers. :Fr. Conidia of the pathogen, which is dispersed by wind, water droplets and by insects, can penetrate the intact grape berry cuticle, but disease expression occurs only under predisposing conditions. Since relatively high infection rates often occur in vineyards, predisposing factors must play a fundamental role in primary infection and subsequent disease occurrence. Insects can play a very important role in this regard by depositing inocula at wound

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39

Persson, Mattias. "Cell death and defence gene responses in plant-fungal interactions /." Uppsala : Dept. of Plant Biology and Forest Genetics, Swedish University of Agricultural Sciences, 2008. http://epsilon.slu.se/200851.pdf.

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Paul, Tabu Cleopas. "Fusarium wilt of oil palm : studies on resistance and pathogenicity." Thesis, University of Bath, 1995. https://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.296329.

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Van, Dyk Kerien. "Fungi associated with root and crown rot of wheat and barley in Tanzania." Diss., University of Pretoria, 2003. http://hdl.handle.net/2263/25941.

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Schuh, Casey Steven. "Revisiting Management Practices for Diseases of Spring Barley in North Dakota." Thesis, North Dakota State University, 2018. https://hdl.handle.net/10365/28723.

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Common barley diseases observed in North Dakota include net blotch, spot blotch, leaf and stripe rust, bacterial leaf streak, and Fusarium head blight. The first objective of this research was to determine the effect of variety and fungicide timing on disease development of barley under conventionally tilled systems. Five field trials were performed in 2016-2017 to test the effect of common varieties and fungicide applications on foliar disease of barley. Overall, varietal selection had a greater effect on the level of foliar disease observed than fungicide application. The second objectiv

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Siddiq, Anjum Ara. "The control of sexual morphogenesis in Pyrenopeziza brassicae, cause of light leaf spot of brassicas." Thesis, University of Cambridge, 1989. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.330090.

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Van, Rooi Cicelia. "Infection by dry, airborne Botrytis cinerea conidia and fungicide efficacy on different parts of grape bunches and vinelets." Thesis, Stellenbosch : Stellenbosch University, 2002. http://hdl.handle.net/10019.1/52888.

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Thesis (MScAgric)--University of Stellenbosch, 2002.<br>ENGLISH ABSTRACT: The evaluation of fungicide efficacy in commercial vineyards can be influenced by the sporadic occurrence of Botrytis cinerea at various positions on vines, differences in bunch structure during bunch development and the phenomenon that symptom expression in shoots and bunches is governed by the resistance reaction of the various shoot and bunch parts. It has been postulated that, following air and water dispersal, infection by solitary conidia should playa prominent role in the epidemiology of B. cinerea on grapev

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Wijayanto, Teguh. "Genetic manipulation of programmed cell death (PCD) for reduced susceptibility to necrotrophic fungi in narrow-leafed lupin (Lupinus angustifolius) /." Connect to this title, 2006. http://theses.library.uwa.edu.au/adt-WU2007.0206.

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Bester, Wilma. "Characterisation and management of trunk disease-causing pathogens on table grapevines." Thesis, Stellenbosch : Stellenbosch University, 2006. http://hdl.handle.net/10019.1/21550.

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Thesis (MScAgric)--University of Stellenbosch, 2006.<br>ENGLISH ABSTRACT: Phaeomoniella chlamydospora, Eutypa lata, Phomopsis, Phaeoacremonium, and Botryosphaeria spp. are important trunk disease pathogens that cause premature decline and dieback of grapevine. Previous research has focused primarily on wine grapes and the incidence and symptomatology of these pathogens on table grapes were largely unknown. A survey was therefore conducted to determine the status and distribution of these pathogens and associated symptoms in climatically diverse table grape growing regions. Fifteen farms w

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Groenewald, Susan. "Biology, pathogenicity and diversity of Fusarium oxysporum f.sp. cubense." Pretoria : [s.n.], 2005. http://upetd.up.ac.za/thesis/available/etd-02232007-175712.

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Windell, Nicole Elizabeth. "Leaf blackening and the control thereof in selected Protea species and cultivars." Stellenbosch : Stellenbosch University, 2012. http://hdl.handle.net/10019.1/20396.

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Thesis (MScAgric)--Stellenbosch University, 2012.<br>ENGLISH ABSTRACT: Leaf blackening, a postharvest disorder which is characterized by a dark brown to black discoloration, is found in most commercially important Protea cut flower species and cultivars. As this disorder is known to increase with storage time, it is a major concern to the South African industry as the use of sea freight is increasingly preferred due to lower transport costs and a more favourable carbon footprint. The cause of leaf blackening has been strongly linked to a carbohydrate stress exerted by the large infloresce

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De, Ascensao Ana. "Isolation and characterisation of a polygalacturonase-inhibiting protein (PGIP) and its encoding gene from Vitis vinifera L." Thesis, Stellenbosch : Stellenbosch University, 2001. http://hdl.handle.net/10019.1/52312.

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Thesis (PhD)--Stellenbosch University, 2001.<br>ENGLISH ABSTRACT: Polygalacturonase-inhibiting proteins (PGIPs) are present in the cell walls of a variety of plant species. These proteins have been shown to specifically inhibit endopolygalacturonases (endo-PGs) secreted by invading fungal pathogens as part of the induced disease resistance mechanism of plants. This is the first report on the isolation and characterisation of a pgip gene from Vitis vinifera L., designated grapevine pgip1. A single open reading frame encoding a deduced polypeptide of 333 amino acids with a predicted molec

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Mohr, Alexandra. "Use of a monoclonal antibody to detect gray mold (Botrytis cinerea) in strawberry." Thesis, McGill University, 2001. http://digitool.Library.McGill.CA:80/R/?func=dbin-jump-full&object_id=33812.

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Gray mold, caused by Botrytis cinerea is the major cause of postharvest loss in strawberries. Detection of flower and fruit infections enables producers to make intelligent management decisions. A plate-trapped ELISA protocol using a Botrytis-specific monoclonal antibody (BC-12.CA4) was developed for the detection of Botrytis cinerea in strawberry flower receptacles and red fruits. Horseradish peroxidase, was chosen as enzyme conjugate because it gave lower background absorbance in disease-free samples. B. cinerea reference antigen (RAg) was isolated from strawberry. BC-12.CA4 was very sensiti

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