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Dissertations / Theses on the topic 'Botrytis cinerea'

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Published: 4 June 2021
Last updated: 25 July 2025

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1

Shafia, Aminath. "Latent infection of Botrytis cinerea." Thesis, University of Reading, 2009. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.499372.

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Latent B. cinerea was detected in nine symptomless wild host species from the families Asteraceae and Brassicaceae, in addition to greenhouse grown lettuce. Conventional testing methods revealed that latent B. cinerea was equally prevalent in the root system as the above ground parts. Incidence of latent infection was moderate in some species (Achillea milleforlium, Arabidopsis thaliana, Centraurea nigra, Cirsium vulgare, Senecio jacobaea, Senecio vulgaris and Taraaxacum agg.) and rare in others (Tussilago farfara and Bellis perennis). In greenhouse lettuce, latent infection was activated by p
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2

Lewis, Megan. "The flavohaemoglobins of Botrytis cinerea." Thesis, University of Sheffield, 2009. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.521869.

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3

Rajaguru, Bulathsinhalage Anuja Priyangani. "Molecular ecology of Botrytis cinerea." Thesis, University of Reading, 2008. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.494963.

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Systemic Botrytis cinerea isolates were collected from non symptomatic fruits of Rubus fruticosus (blackberry) and Fragaria x ananassae (strawberry) and from roots and leaves of wild Primula vulgaris (primrose) and Taraxacum agg. (dandelion) in Brighton, Bath, and Reading separated by 80km or more. Isolates recovered from a Primula x polyantha crop at Reading were also tested. Approximately 300 isolates were genetically characterised using 9 published microsatellite primers and the presence of two transposable elements, boty and flipper. In wild primula and dandelion, incidence of non-symptoma
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4

Emmanuel, C. J. "'Symptomless' infection by Botrytis cinerea." Thesis, University of Reading, 2016. http://centaur.reading.ac.uk/63176/.

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The study was carried out to clarify the nature of symptomless infection by Botrytis cinerea and to what extent it differs from aggressive necrotic infection in Lactuca sativa (lettuce) and Arabidopsis thaliana. Symptomless plants were produced by dry spore inoculation in plants growing in controlled environmental conditions or in glasshouses. Plating out of surface-disinfected and non-surface-disinfected samples of inoculated, apparently healthy, plants on selective medium revealed that the fungus was spreading from the initial inoculation site to newly developing plant organs both internally
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5

Biosa, Carlotta. "Botrytis cinerea e la sua forma nobile." Bachelor's thesis, Alma Mater Studiorum - Università di Bologna, 2020.

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Il presente elaborato descrive gli aspetti generali di Botrytis cinerea quando si sviluppa come muffa grigia e muffa nobile. La differenza fra queste due diverse forme non è data da una differenza genetica del fungo ma dal microclima presente nell'area di infezione. Infatti l'alternanza di condizioni umide a condizioni secche fa si che il fungo si sviluppi solo all'interno dello strato epidermico (acino infavato) senza sviluppare efflorescenze all'esterno dell'acino (muffa grigia).La presenza della muffa apporta all'acino una maggiore concentrazione di solidi solubili, un lieve innalzamento di
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6

Swadling, Iain. "Biological control of Botrytis cinerea in strawberries." Thesis, University of Kent, 1994. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.240120.

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7

Deligeorgopoulou, Athina. "Sesquiterpenoids and their biotransformation by Botrytis cinerea." Thesis, University of Sussex, 2002. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.392802.

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8

Bratt, Richard P. "Spoilage of senescing flax by Botrytis cinerea Pers." Thesis, Queen's University Belfast, 1987. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.317056.

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9

Fernandez, Olivier. "Métabolisme du tréhalose chez la vigne (Vitis vinifera L.) en conditions stressantes : effets du froid et de l’infection par Botrytis cinerea." Thesis, Reims, 2011. http://www.theses.fr/2011REIMS016/document.

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L’objectif de mes travaux de thèse était d’étudier le métabolisme du tréhalose chez la vigne (Vitis vinifera L. cv. Chardonnay) en réponse à l’exposition à deux stress : le froid" chilling " et l’infection par le champignon pathogène Botrytis cinerea.Pour cela, nous avons tout d’abord optimisé un dosage du tréhalose par fluorimétrie qui nous a permis de caractériser le métabolisme du tréhalose en réponse à ces deux stress.Le métabolisme du tréhalose est activé différemment par le froid dans les organes dela vigne. Les gènes VvTPPA, codant une enzyme de synthèse du tréhalose, et VvTRE, codantla
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10

Barnes, Sally Elissa. "The epidemiology of Botrytis cinerea on greenhouse grown ornamentals." Thesis, University of Reading, 2002. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.394420.

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11

Rayfield, Emily. "UV blocking films for the control of Botrytis cinerea." Thesis, University of Reading, 2001. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.270916.

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12

Mobbs, Daniel James. "Studies towards the control of the phytopathogen Botrytis cinerea." Thesis, University of Sussex, 1999. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.297945.

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13

Lock, Andrew David. "Strategies for isolating the ferric reductase of Botrytis cinerea." Thesis, University of Bristol, 2003. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.399947.

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14

Spies, Christoffel F. J. (Christoffel Frederik Jakobus). "The inoculum ecology of Botrytis cinerea in Rooibos nurseries." Thesis, Stellenbosch : Stellenbosch University, 2005. http://hdl.handle.net/10019.1/20943.

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Thesis (MScAgric)--University of Stellenbosch, 2005.<br>ENGLISH ABSTRACT: Grey mould, caused by Botrytis cinerea, is the most important foliar disease of rooibos seedlings. Although the disease is primarily controlled with applications of fungicides, the improvement of cultural methods of disease management should lessen this dependence on chemical control. Such improvements would, however, not be possible without knowledge of the inoculum sources and dispersal of the pathogen. The aim of this study was to investigate the inoculum ecology of B. cinerea in rooibos nurseries in order to ide
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15

El, Oirdi Mohamed. "Facteurs qui contrôlent le pouvoir pathogène chez Botrytis cinerea." Thèse, Université de Sherbrooke, 2009. http://savoirs.usherbrooke.ca/handle/11143/5109.

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Les protéines hnRNP A1 sont impliquées dans l'épissage alternatif. Un mode d'action proposé implique la formation d'homodimères entre molécules hnRNP A1 causant un réarrangement dans la structure de l'ARN pré-messager. Cette modulation de l'ARN permettrait le rapprochement de sites d'épissage 5' et 3' d'exons situés de par et d'autres d'un exon alternatif. Le domaine riche en résidus glycines est responsable, en grande partie, de l'interaction entre les deux protéines hnRNP A1. Comme la protéine hnRNP H contient aussi un domaine riche en résidus glycines, nous avons postulé que cette dernière
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16

Carlini, Nicola. "Fragola e Botrytis cinerea: un rapporto difficile da spezzare." Bachelor's thesis, Alma Mater Studiorum - Università di Bologna, 2021.

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Il settore della fragola ha conosciuto diversi mutamenti nel corso del Novecento, per via della sua sempre più larga diffusione, delle nuove tecnologie e dei recenti sviluppi in materia scientifica. Tali mutamenti sono in continua evoluzione, influenzati sia dalle tendenze del mercato, sia dall’affermazione del contributo nutrizionale della fragola, oramai riconosciuto. Tuttavia, esistono molteplici problematiche a carico di questo frutto, che dipendono da territorio, clima, tipologie di coltivazione e conservazione post-raccolta, ma anche e soprattutto, dai patogeni, primo fra tutti, Botr
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17

Silva, Paula Renata Alves da. "Interação Clonostachys rosea, Silício e Botrytis cinerea em pepineiro." Universidade Federal de Viçosa, 2012. http://locus.ufv.br/handle/123456789/4421.

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Made available in DSpace on 2015-03-26T13:37:51Z (GMT). No. of bitstreams: 1 texto completo.pdf: 776205 bytes, checksum: bdeb274d6dc080817dbbde35d5621b65 (MD5) Previous issue date: 2012-02-23<br>Coordenação de Aperfeiçoamento de Pessoal de Nível Superior<br>Cucumber plants grown in greenhouse conditions are often infected by Botrytis cinerea, which causes the gray mold. The disease is controlled by successive applications of fungicides. In the perspective of integrated management of gray mold, we studied the effects of the interaction Clonostachys rosea, Silicon (Si) and Botrytis cinerea on
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18

Bala, Kanak. "Biological control of Botrytis cinerea, a destructive plant-pathogen." Dijon, 2007. http://www.theses.fr/2007DIJOS047.

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Il est connu que les ‘pesticides’ (produits phytopharmaceutiques) utilisés depuis plus de 100 ans en agriculture sont néfastes, autant pour les vivants que pour l’environnement. Il est urgent de développer un remplacement de ces produits toxiques à l’homme et à son entourage. Le but de ce travail est double : d’abord, trouver les micro-organismes non pathogènes dans les vignobles et, ensuite, les mettre en concurrence avec les parasites de la vigne. Nous envisageons de tirer bénéfice sur deux fronts : 1. Lutte biologique contre les maladies cryptogamiques de la vigne, 2. Déclenchement de la ré
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19

Mulema, Joseph Mary K. "Molecular characterization of the Arabidopsis thaliana - Botrytis cinerea interaction." Doctoral thesis, University of Cape Town, 2008. http://hdl.handle.net/11427/4304.

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Includes bibliographical references (leaves 199-253).<br>This study attempted to characterize at a transcriptional level, the defence responses of Arabidopsis thaliana after infection by Botrytis cinerea, using microarrays. The first microarray experiment focused on profiling Arabidopsis genes induced by B. cinerea over time (temporal) while the second investigated spatial expression of Arabidopsis genes from the point of inoculation. A number of genes were up- and down-regulated specifically at 12 hrs, others at 24 hrs while others were up- and down-regulated at both time points. Similarly, s
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20

Azeddine, Saad. "Résistance au fenhexamid dans le complexe d'espèces Botrytis cinerea/ Botrytis pseudocinerea : Etudes génétiques et moléculaires." Thesis, Paris 11, 2014. http://www.theses.fr/2014PA112107.

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La pourriture grise est une maladie qui affecte de nombreuses cultures dont la vigne. Elle est provoquée par un complexe de deux espèces fongiques, l’espèce majoritaire Botrytis cinerea et l’espèce minoritaire Botrytis pseudocinerea. Les deux espèces se distinguent par leur sensibilité à certains fongicides notamment au fenhexamid, inhibiteur de la 3-cétoréductase des stérols. Ce fongicide a un spectre d’action restreint aux espèces phylogénétiquement proches du genre Botrytis (Sclerotinia et Monilinia fructicola). Son utilisation a conduit à la sélection de souches résistantes parmi lesquelle
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21

Costa, Lúcio Bertoldo 1985. "Efeito da radiação UV -B na interação Botrytis cinerea - clonostachys rosea em morangueiro e do ácido 4 - aminobenzóico no controle do patógeno em tabaco /." Botucatu :, 2014. http://hdl.handle.net/11449/110974.

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Orientador: Wagner Bettiol<br>Banca: Edson Luis Furtado<br>Banca: Antonio Carlos Maringoni<br>Banca: Marcelo Augusto Boechat Morandi<br>Banca: Gilberto Ubida Leite Braga<br>Resumo: A incidência de radiação ultravioleta (UV 100 a 400 nm) na terra , em especial a radiação UV - B (280 - 320 nm), por ser filtrada exclusivamente pela camada de ozônio e apresentar grande efetividade biológica , quando comparada com os outros espectros da radiação UV , está sendo alterad a com as mudanças climáticas . Sendo a radiação solar um importante componente climático durante o desenvolvimento de um microrgani
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22

Gerard, Clémentine. "Caractérisation fonctionnelle d'inhibiteurs de protéases lors de l'interaction Vigne/Botrytis cinerea." Thesis, Reims, 2014. http://www.theses.fr/2014REIMS035/document.

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Caractérisation d'inhibiteurs de protéases lors de l'interaction entre la vigne et Botrytis cinerea. Il a été montré que lors de l'infection de la baie de raisin par B. cinerea, des protéases fongiques pourraient être à l'origine de la dégradation d'une des protéines PR majoritaires de la baie mûre, la chitinase VvChi4D (Thèse S. Colas, 2012 ; van Sluyter et al., 2013). L'hypothèse émise lors de notre étude est que des inhibiteurs de protéases de la vigne pourraient empêcher la dégradation de cette protéine de défense par les protéases de B. cinerea.L'expression de deux inhibiteurs de protéase
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23

Dulermo, Thierry. "Transfert du carbone au cours de l'infection du tournesol par le champignon nécrotophe B. Cinerea : des hexoses de la plante au mannitol fongique." Lyon 1, 2009. http://www.theses.fr/2009LYO10002.

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Nos travaux ont été réalisés sur Botrytis cinerea, champignon nécrotrophe ascomycète. La première étape de notre travail a consisté à dresser un état des lieux des métabolites carbonés solubles présents chez les partenaires de l’infection : Botrytis cinerea et le cotylédons de tournesol et de suivre leur évolution au cours de l’infection. Au cours de la colonisation des cotylédons de tournesol, les hexoses d’origine végétale disparaissent, alors que du mannitol d’origine fongique est accumulé. Afin de mettre en évidence les éléments impliqués dans la disparition des hexoses dans la plante, nou
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24

Vannel, Dominique. "Etude in vitro de la relation vigne - Botrytis cinerea : mise au point de biotests." Dijon, 1990. http://www.theses.fr/1990DIJOS032.

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La pourriture grise, maladie tres redoutée des viticulteurs, est due à un champignon, Botrytis cinerea. L'objectif de cette étude est la mise au point de bioessais utilisant des méthodes de culture in vitro et permettant d'évaluer la sensibilité de la vigne à cette maladie. La finalité de ce travail est la sélection de clones résistants ou tolérants en utilisant la variabilité somaclonale introduite par l'embryogenèse somatique. Les bioessais mis au point font appel à différents niveaux d'organisation du végétal : vitroplants, feuilles, cultures de tissus (cals) et protoplastes. Ils ont permis
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25

Franicevic, Simon Carl. "Biological control of Botrytis cinerea and Sclerotinia sclerotiorum on kiwifruit." Thesis, University of Auckland, 1993. http://hdl.handle.net/2292/1971.

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Botrytis cinerea and Sclerotinia sclerotiorum are the two most serious pathogens on kiwifruit in New Zealand. Because of the pesticide regulations in some of the countries to which New Zealand exports fruit, total protection from Botrytis stem end rot with current dicarboximide fungicides is not possible. The aim of this thesis was to investigate biological control measures for Botrytis stem end rot and Sclerotinia diseases of kiwifruit. More than 1000 microorganisms, isolated from the leaves and flowers of kiwifruit during spring and autumn, and selected from BCAs reported to be effective aga
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26

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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27

LÓPEZ, AGUILAR NICOLASA. "EFECTIVIDAD in vitro DE TIABENDAZOL SOBRE Botrytis cinerea PERS. FR." Tesis de Licenciatura, UNIVERSIDAD AUTÓNOMA DEL ESTADO DE MÉXICO, 2019. http://hdl.handle.net/20.500.11799/99923.

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El fitopatógeno Botrytis cinerea afecta el botón floral del cultivo de rosa bajo condiciones de campo y poscosecha. En la región florícola del Estado de México, el manejo se basa en el uso de fungicidas entre los que se encuentra el tiabendazol, al cual ha perdido sensibilidad y en algunos casos ha desarrollado resistencia. Por lo anterior, el objetivo de la presente investigación fue determinar la DL50 y la DL95 bajo condiciones in vitro de tiabendazol frente a B. cinerea. Se utilizaron las cepas VBc1 y TBc2 provenientes de los municipios de Villa Guerrero y Tenancingo, Estado de México, resp
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28

Mohamed, Nwara. "Pythium et Pythines : rôle dans les relations vigne / Botrytis cinerea." Dijon, 2006. http://www.theses.fr/2006DIJOS059.

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29

Adams, Nicolette. "Investigation of defence mechanisms against Botrytis cinerea in Arabidopsis thaliana." Master's thesis, University of Cape Town, 2005. http://hdl.handle.net/11427/4235.

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Includes bibliographical references (leaves 63-86).<br>Disease resistance in plants has been extensively studied for the past century with many new and exciting results being discovered each year. A plant utilises both preformed and induced defence responses to resist pathogen attack but researchers have focused on dissecting the induced defence response pathway. The complex signal transduction pathway underlying the establishment of resistance to a wide range of pathogen attack is currently being dissected using Arabidopsis thaliana as a model organism. Arabidopsis mutants displaying altered
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30

Ng, Kenneth K. "Investigation of Bacillus subtilis as a Biopesticide Against Botrytis cinerea." DigitalCommons@CalPoly, 2012. https://digitalcommons.calpoly.edu/theses/717.

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The objective of this thesis was to investigate BiOWiSHTM-Aqua, a commercial dry solid formulation containing a consortium of bacteria and yeast, as a biopesticide for treatment of Botrytis cinerea, a gray mold that affects strawberries. BiOWiSHTM-Aqua was compared with another commercial product specifically used as a fungicide and bacteriocide, Serenade® Garden Disease Control Spray (concentrated Bacillus subtilis strain QST 713). Both laboratory tests as well as in vivo lab tests were conducted. BiOWiSHTM-Aqua results varied widely from plate to plate, regardless of experimental conditions.
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31

Tauati, Seuseu. "Investigating RNA silencing and mycoviruses in Botrytis cinerea : could host-mediated gene silencing prevent the use of mycoviruses for the biological control of Botrytis cinerea?" Thesis, University of Bristol, 2011. http://hdl.handle.net/1983/042b3b25-9829-4f57-a013-8370d000254c.

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32

Ajouz, Sakhr. "Estimation du potentiel de résistance de Botrytis cinerea à des biofongicides." Phd thesis, Université d'Avignon, 2009. http://tel.archives-ouvertes.fr/tel-00453646.

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La pourriture grise, causée par le champignon Botrytis cinerea, est l'une des principales maladies aériennes fongiques sur diverses cultures d'importance agronomique. La diversité génétique de B. cinerea est très forte et la capacité rapide d'adaptation de ce champignon à une pression sélective est également avérée. Ce champignon est ainsi capable de développer des résistances à une grande variété de composés fongicides de synthèse ou d'origine naturelle. Des méthodes alternatives de lutte ont de ce fait été développées ces dernières années : divers agents de lutte biologique (ALB) présentant
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33

Darras, Anastasios I. "Biology and management of freesia flower specking caused by Botrytis cinerea." Thesis, Cranfield University, 2003. http://dspace.lib.cranfield.ac.uk/handle/1826/3588.

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There is no published research regarding postharvest infection of freesia flowers by Botrytis cinerea. Although, infection problems have concerned freesia growers and wholesalers in recent years. The overall objectives of this study were firstly to evaluate the factors affecting B. cinerea postharvest disease establishment and secondly to evaluate a range of novel potential treatments to reduce postharvest freesia infection. These treatment options include plant activators such as acibenzolar-S-methyl and methyl jasmonate and biotic (Aureobasidium pullulans) and abiotic (UV-C irradiation) biol
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Yahaya, Sani Mohammed. "Consequences of systemic infection by Botrytis cinerea in a tritrophic system." Thesis, University of Reading, 2013. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.632827.

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Botrytis cinerea was systemically transferred into lettuce seeds by dry inoculation of the flower/bud with fungal spores. Plants grown from seeds were found to be systemically infected. Plants grown from infected seeds were used to investigate the behaviour of this systemic pathogen under different soil water saturations and the interaction of the pathogen with organisms at higher trophic levels. Variation in soil water saturation stressed the host plants resulting in a lower rate of photosynthesis, chlorophyll fluorescence and root weight. When the lettuce plants were infested with aphids (My
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35

Lloyd, Amanda. "Revealing ethylene-mediated reprogramming against Botrytis cinerea using a metabolomic approach." Thesis, Aberystwyth University, 2008. http://hdl.handle.net/2160/db296828-2730-4c30-aad7-a77506ec0e70.

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36

Nurmberg, Pedro Luiz. "Identification of key Arabidopsis genes required for resistance against Botrytis cinerea." Thesis, University of Edinburgh, 2005. http://hdl.handle.net/1842/15543.

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Despite the significant progress achieved in molecular biology in the last few years, our knowledge about the mechanisms of plant resistance against necrotrophic and non-host pathogens is still rudimentary. Here, we report the isolation and characterization of three Arabidopsis mutants selected for altered resistance against B. cinerea. Mutations in the Increased Botrytis Resistance (IBRJ) gene resulted in significant resistance against B. cinerea and A. brassicicola, another necrotrophic fungus. Interestingly, ibri plants also exhibited enhanced susceptibility to the host and non-host bacteri
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37

Liu, Weiwei. "Caractérisation de la cascade de signalisation osmotique ″os″ chez Botrytis cinerea." Paris 11, 2008. http://www.theses.fr/2008PA112009.

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Les cascades de signalisation fongiques du type Hog1 sont impliquées dans diverses fonctions telles l'adaptation aux stress, la résistance aux fongicides, le développement et, dans certains cas, la virulence. Nous avons caractérisé la cascade homologue chez l'ascomycète phytopathogène Botrytis cinerea via l'inactivation de l'histidine-kinase senseur Bos1, sa relation par rapport à la MAPK Sak1 et la régulation de gènes cibles. Les analyses de phosphorylation montrent que Bos1 inhibe la phosphorylation de Sak1 en l'absence de stimulus externe. En conditions de stress, cette inhibition est levée
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38

Cosseboom, Scott D. "Characterization of Botrytis cinerea resistance to fungicides in California strawberry production." DigitalCommons@CalPoly, 2018. https://digitalcommons.calpoly.edu/theses/1817.

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Gray mold of strawberry, caused by Botrytis cinerea, is a very destructive pre- and post-harvest fruit rot. Outside of California, fungicide resistance in B. cinerea has been reported to every site-specific chemical class labeled for use against gray mold. One objective of this study was to characterize the resistance of 888 isolates of B. cinerea from California strawberry fields to ten active ingredients. Isolates were collected from the same planting block in 47 fields during the early-season (0 to 8 fungicide applications) and late-season (16 to 26 fungicide applications) of 2016. Sensitiv
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39

Stoker, Claire. "Influence of the circadian clock on Arabidopsis defence against Botrytis cinerea." Thesis, University of Warwick, 2016. http://wrap.warwick.ac.uk/89945/.

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The circadian clock is an endogenous mechanism that provides a wide variety of organisms with the ability to anticipate daily environmental changes. It was shown that under cyclic and constant light growth conditions Arabidopsis exhibits rhythmicity in Botrytis cinerea resistance, with maximal resistance observed when leaves were inoculated at dawn. Crucially, this mechanism was confirmed to be under circadian clock regulation. To understand how the circadian clock was driving an effective defence response, genes that were more rapidly induced or repressed after inoculation at dawn compared to
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Porquier, Antoine. "Etude des mécanismes de régulation du métabolisme secondaire chez Botrytis cinerea." Thesis, Université Paris-Saclay (ComUE), 2016. http://www.theses.fr/2016SACLS480/document.

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Botrytis cinerea est un champignon nécrotrophe et polyphage capable de provoquer la pourriture grise sur plusieurs centaines d’espèces végétales. Les pertes engendrées par cette maladie sont importantes à travers le monde notamment sur des espèces économiquement importantes comme la tomate, la fraise ou encore la vigne. Parmi les facteurs de virulence identifiés chez B. cinerea se trouvent deux toxines non-hôte spécifiques. Il s'agit du sesquiterpène botrydial et du polycétide acide botcinique. Même si leur rôle redondant dans la nécrotrophie a été démontré, les mécanismes qui gouvernent l’exp
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41

Pais, da Cunha Adérito Tomás. "Overcome of grape chemical barriers by the fungal pathogen Botrytis cinerea." Doctoral thesis, Università degli studi di Padova, 2011. http://hdl.handle.net/11577/3425334.

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Botrytis cinerea in contact with mature grape berries encounters an environment particularly rich in polyphenols and PR proteins, where the stilbenic phytoalexin trans-resveratrol may accumulate. To mimic conditions similar to those found in grape berries, B. cinerea was grown in vitro with grape PR proteins and polyphenols extracted from mature grapes and with trans-resveratrol. Results showed that in the presence of highly toxic amounts of trans-resveratrol, grape polyphenols allowed total recovery of fungal growth, and proteins allowed partial recovery. These resveratrol-polyphenol or resve
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Perrin, Aurélie. "Rôle des alpha-tubulines fongiques dans la symbiose ectomycorhizienne et dans les interactions champignons plantes." Thesis, Lyon 1, 2013. http://www.theses.fr/2013LYO10019.

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Les champignons ont développé diverses interactions avec les végétaux. Ces interactions peuvent être bénéfiques pour la plante dans le cas des champignons établissant des symbioses mutualistes ou néfastes si le champignon est pathogène. Elles reposent sur des mécanismes moléculaires mal élucidés. Des études réalisées sur le champignon mutualiste Hebeloma cylindrosporum associé au pin Pinus pinaster ont permis de créer une collection de mutants affectés dans leur capacité à interagir avec les plantes et à former l’organe mixte de la symbiose, l’ectomycorhize. L’objectif de ma thèse a été d’étud
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Boine, Barbara. "A study of the interaction between the plant pathogenic fungus Botrytis cinerea and the filamentous ssRNA mycoviruses Botrytis virus X and Botrytis virus F." Thesis, University of Auckland, 2012. http://hdl.handle.net/2292/16777.

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The ecological significance of mycoviruses is becoming increasingly recognised, not just for their potential as biocontrol agents but also as driving forces in the evolution and diversification of fungi. Therefore, it is important to understand how mycoviruses and fungi interact on the molecular and biochemical level. To this end the interaction between Botrytis cinerea and the mycoviruses Botrytis virus F and Botrytis virus X was studied. Relative and absolute real time PCR protocols were developed for monitoring the titres of BVX and BVF during transfection studies to monitor changes in viru
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Brutus, Alexandre. "Etude de deux endo β-(1,4) xylanases de famille 11 provenant des champignons Penicillium funiculosum et Botrytis cinerea – Interaction avec des inhibiteurs protéiques du blé, XIP-I, TAXI-I et II". Aix-Marseille 3, 2005. http://www.theses.fr/2005AIX30019.

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Nous avons exprimé dans différents systèmes hétérologues l'ADNc de la xylanase (XYNB) du champignon filamenteux Penicillium funiculosum ainsi que celle du phytopathogène Botrytis cinerea (XynBc) appartenant toutes deux à la famille des GH11 des glycosylhydrolases. Les propriétés physico-chimiques des enzymes recombinantes ont été déterminées. XYNB et XynBc montrent les mêmes spectres d'inhibitions en présence d'inhibiteurs protéiques probablement impliqués dans des mécanismes de défenses des plantes et issus du blé ; les activités sont fortement inhibées par XIP-I et TAXI-I tandis que TAXI-II
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45

Abdel, Mohsin Ibrahim Ghaleb. "Le cycle sexué in vitro de Botryotinia fuckeliana (De Bary), forme parfaite de Botrytis cinerea (Pers. ) : déterminisme - optimisation des conditions d'obtention." Lille 1, 1990. http://www.theses.fr/1990LIL10145.

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Le Botrytis cinerea, anamorphe du Botryotinia fuckeliana est l'agent de la pourriture grise de nombreuses plantes et de la vigne en particulier. Le cycle biologique de cet organisme implique une multiplication directe par conidies et un processus sexué dans lequel interviennent des sclérotes sur lesquels se forment des apothécies et des microconidies ou des spermaties assurant la fécondation. Un recensement des connaissances acquises quant à ce cycle montre l'existence de grandes disparités entre les résultats rapportés. Nous avons essayé de définir les conditions optimales d'obtention des dif
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46

Loisel, Elise. "Étude des transporteurs ABC chez le champignon pathogène des plantes Botrytis Cinerea au cours de l'infection et en réponse à certains fongicides." Thesis, Lyon 1, 2013. http://www.theses.fr/2013LYO10103.

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Lors de l'interaction entre un champignon phytopathogène et une plante hôte, des molécules toxiques peuvent être générées par l'agresseur mais aussi par les réactions de défense de la plante. Par ailleurs, les champignons phytopathogènes sont exposés aux traitements chimiques utilisés au champ à des fins antifongiques. Mieux comprendre les mécanismes impliqués dans la tolérance de ces microorganismes à ces molécules toxiques constitue ainsi un point important tant au point de vue des interactions plante-pathogène que de la tolérance aux produits fongicides. Les transporteurs à efflux sont décr
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47

Manteau, Sébastien. "Interaction vigne - Botrytis : Etude des facteurs de virulence de "Botrytis cinerea" et des protèines de défense de la baie." Reims, 2003. http://www.theses.fr/2003REIMS006.

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"Botrytis cinerea" est un champignon phytopathogène qui infecte les grappes de raisins et plus de 200 plantes hôtes, grâce à ses facteurs de virulence. Leurs sécrétions sont régulées par le pH environnant. Ce champignon semble bien adapté pour croître à pH 3, pH rencontré dans la baie de raisin. La baie de "Vitis vinifera" L. Cv. Pinot Noir possède des protéines de défense (PR-protein). Bien que certaines d'entre elles se soient avérées efficaces contre le développement de B. Cinerea, la baie reste très sensible. Ces protéines de défense, chitinase de classe IV (CHV5) et thaumatin-like (TL) so
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Martinetti, Gladys. "Charakterisierung der genetischen Variabilität von Botrytis cinerea aufgrund von Fungizidresistenz und Enzymaktivität /." [S.l.] : [s.n.], 1986. http://e-collection.ethbib.ethz.ch/show?type=diss&nr=8060.

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Schoene, Philip. "Ulocladium atrum as an antagonist of grey mould (Botrytis cinerea) in grapevine." [S.l.] : [s.n.], 2003. http://deposit.ddb.de/cgi-bin/dokserv?idn=967421179.

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Hamann, Fábio André. "Aspectos do controle biológico de Botrytis cinerea Pers. Ex. Fr. em videira." Universidade Federal de Santa Maria, 2011. http://repositorio.ufsm.br/handle/1/5054.

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Coordenação de Aperfeiçoamento de Pessoal de Nível Superior<br>Rio Grande do Sul (RS), the most important state of grape production in Brazil, harvests, approximately, 780 thousand tons annually. One of the biggest constraint factors to the obtainment of higher production numbers is the incidence of late season diseases in vineyards, being botrytis bunch rot, caused by Botrytis cinerea, one of the major contributors for field and post-harvest losses. Red grapes can show more resistance against this fungus, due to higher levels of phenolic compounds. The use of biological control agents (BCAs)
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