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Dissertations / Theses on the topic 'Microbial antagonists'

Author: Grafiati

Published: 18 May 2024

Last updated: 25 July 2025

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1

Ghosh, Sankar. "Studies on post harvest diseases of tomato pineapple and orange and their control by microbial antagonists and botanicals." Thesis, University of North Bengal, 2010. http://hdl.handle.net/123456789/1417.

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2

Mendoza, Luna Alexander Rafael. "Interrelationships between microbial antagonists having divergent modes-of-action and their influence on biological control of plant-parasitic nematodes." Göttingen Cuvillier, 2008. http://d-nb.info/989139182/04.

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3

Hollywood, Jane Constance. "Biological control of late blight of potatoes : in vivo and in vitro evaluation of microbial antagonists against tuber blight." Thesis, University College London (University of London), 2004. http://discovery.ucl.ac.uk/1446592/.

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The cost of losses and control measures attributed to late blight of potatoes caused by Phytophthora infestans, are estimated to exceed $5 billion annually. Breeding for resistance is difficult owing to the tetraploid genotype of potato and current strains of the pathogen have developed resistance to chemical control. Consequently the search for biological control has assumed greater importance. In this investigation an in vivo bioassay was used to select soils antagonistic to late blight of potatoes, caused by Phytophthora infestans. Four out of eight samples demonstrated reproducible antagon

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4

Nascimento, Mariela Otoni do. "Interação entre fungos de solos e a formiga-cortadeira Atta sexdens (Linnaeus, 1758)." Universidade Federal do Tocantins, 2015. http://hdl.handle.net/11612/374.

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As formigas-cortadeiras (Hymenoptera: Formicidae), gêneros Atta e Acromyrmex, são as pragas mais importantes da silvicultura, encontradas exclusivamente nas Américas. Sua importância econômica se deve ao seu hábito alimentar de cortar material vegetal fresco – sendo algumas importantes espécies cultivadas - que serve de substrato para o fungo simbionte mutualista Leucoagaricus gongylophorus (Basidiomycota: Agaricales) o qual é cultivado em câmaras subterrâneas. As fêmeas fecundadas são responsáveis pela fundação de uma nova colônia e sofrem influência direta de microrganismos presentes no solo

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5

Rodrigues, André [UNESP]. "O papel dos microfungos associados aos jardins das formigas Attini (Hymenoptera: Formicidae)." Universidade Estadual Paulista (UNESP), 2009. http://hdl.handle.net/11449/103936.

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Made available in DSpace on 2014-06-11T19:32:54Z (GMT). No. of bitstreams: 0 Previous issue date: 2009-01-12Bitstream added on 2014-06-13T21:05:12Z : No. of bitstreams: 1 rodrigues_a_dr_rcla.pdf: 1112229 bytes, checksum: f59b4675edb860a1b20d6b5f1f7e6dc9 (MD5)<br>Conselho Nacional de Desenvolvimento Científico e Tecnológico (CNPq)<br>As formigas da tribo Attini são conhecidas pela complexa simbiose que mantêm com fungos, os quais cultivam como alimento. É sabido que além desse fungo, outros microrganismos podem ser encontrados nos ninhos desses insetos e estudos prévios apontaram que alguns

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6

Carder, Phyllis. "Microbial Communities of Spinach at Various Stages of Plant Growth From Seed to Maturity." Thesis, Virginia Tech, 2010. http://hdl.handle.net/10919/34104.

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<p>Little is known about how the leaf bacterial community is affected by the seed microbiota at different stages of plant development. The bacterial populations of spinach seed and leaves after germination were compared using DGGE, to assess bacterial community richness, and real-time PCR to compare the abundance of select phyla (total bacteria, <i>Actinobacteria, Bacteroidetes, Firmicutes, Î±-Proteobacteria and Î²- Proteobacteria</i>). To determine the effect of environment, the plants were grown in the field and growth chambers. Vertical transmission of bacterial community members was evide

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7

Travaglini, Raphael Vacchi. "Bases para o controle microbiano de formigas cortadeiras." Universidade Estadual Paulista (UNESP), 2017. http://hdl.handle.net/11449/152256.

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Submitted by RAPHAEL VACCHI TRAVAGLINI null (raphatrava86@ig.com.br) on 2017-12-07T19:28:06Z No. of bitstreams: 1 RAPHAEL VACCHI TRAVAGLINI (1).pdf: 3425184 bytes, checksum: 732c0234a70c06bd049339e979dadab5 (MD5)<br>Approved for entry into archive by Maria Lucia Martins Frederico null (mlucia@fca.unesp.br) on 2017-12-08T11:14:08Z (GMT) No. of bitstreams: 1 travaglini_rv_bot_int.pdf: 3425184 bytes, checksum: 732c0234a70c06bd049339e979dadab5 (MD5)<br>Made available in DSpace on 2017-12-08T11:14:08Z (GMT). No. of bitstreams: 1 travaglini_rv_bot_int.pdf: 3425184 bytes, checksum: 732c0234a70c06

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REVETTA, RANDY PRIMO. "ISOLATION AND IDENTIFICATION OF FRESHWATER BACTERIA ANTAGONISTIC TO GIARDIA INTESTINALIS." University of Cincinnati / OhioLINK, 2006. http://rave.ohiolink.edu/etdc/view?acc_num=ucin1141305893.

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9

Tydings, Heather Anne. "Identification and Optimization of the Antagonistic Potential of Native Spinach Microbiota towards Escherichia coli O157:H7." Thesis, Virginia Tech, 2010. http://hdl.handle.net/10919/43364.

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Leafy greens such as spinach have been the object of several recent food-borne pathogen outbreaks. The purpose of this study was to isolate bacteria spinach epiphytic bacteria that inhibit growth of E. coli O157:H7, which we describe as antagonism. The mechanism of antagonism was investigated and we attempted to improve the antagonistic potential in vitro and on spinach leaves when cellobiose, a carbon source utilized by the antagonists but not E. coli O157:H7, was added. There were larger culturable populations of bacteria on the leaves of savoyed cultivars compared to flat. From the isolated

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10

Lima, José Vinícius Leite. "Populações microbianas e antagonismo de actinobactérias sobre rizóbios em solos do semiárido." reponame:Repositório Institucional da UFC, 2017. http://www.repositorio.ufc.br/handle/riufc/26028.

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LIMA, José Vinícius Leite. Populações microbianas e antagonismo de actinobactérias sobre rizóbios em solos do semiárido. 2017. 81 f. Tese (Doutorado em Ecologia e Recursos Naturais)-Centro de Ciências, Universidade Federal do Ceará, Fortaleza, 2017.<br>Submitted by ELAINE PEREIRA (ellainec.pereira@gmail.com) on 2017-09-19T17:31:18Z No. of bitstreams: 1 2017_tese_jvllima.pdf: 1448998 bytes, checksum: 2c2b1578a9568ad79222074a03a8f266 (MD5)<br>Approved for entry into archive by Jairo Viana (jairo@ufc.br) on 2017-09-22T17:59:28Z (GMT) No. of bitstreams: 1 2017_tese_jvllima.pdf: 1448998 bytes, c

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Andrade, Luísa Carvalho. "Bioprospecção de microrganismos marinhos isolados na Baía de Todos os Santos com atividade antagonista a bactérias patogênicas." Instituto de Ciências da Saúde, 2014. http://repositorio.ufba.br/ri/handle/ri/23505.

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Submitted by Programa de Pós-graduação em Biotecnologia (mebiotec.ufba@gmail.com) on 2017-04-04T13:16:42Z No. of bitstreams: 1 DISSERTAÇÃO Final - LUISA CARVALHO ANDRADE.pdf: 1905703 bytes, checksum: d26c7953ce5663f0aca0a866c5701328 (MD5)<br>Approved for entry into archive by Delba Rosa (delba@ufba.br) on 2017-07-06T12:52:48Z (GMT) No. of bitstreams: 1 DISSERTAÇÃO Final - LUISA CARVALHO ANDRADE.pdf: 1905703 bytes, checksum: d26c7953ce5663f0aca0a866c5701328 (MD5)<br>Made available in DSpace on 2017-07-06T12:52:48Z (GMT). No. of bitstreams: 1 DISSERTAÇÃO Final - LUISA CARVALHO ANDRADE.pdf: 190

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12

Nguyen, Phuong Anh. "Biocontrôle de la flore fongique phytopathogène et/ou mycotoxinogène : étude des mécanismes moléculaires et physiologiques impliqués dans les interactions microbiennes antagonistes, optimisation des compétences des agents biologiques de contrôle identifiés." Thesis, Montpellier, 2017. http://www.theses.fr/2017MONTT086/document.

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Fusarium verticillioides est une moisissure phytopathogène et mycotoxinogène dont l’occurrence est fréquente dans le sol et dans de nombreux céréales et végétaux et plus particulièrement dans le maïs et le blé. La contamination des cultures par F. verticillioides conduit à des maladies variées et est souvent associée avec une accumulation de mycotoxines. Les fumonisines B1 (FB1) and B2 (FB2) sont les toxines les plus dangereuses produites par F. verticillioides. Des conséquences létales de la consommation de produits alimentaires contaminés par les fumonisines ont été reportées chez les animau

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13

Sattin, Eleonora. "16S amplicon Next Generation Sequencing approach evaluation and its application to food microbial communities characterization." Doctoral thesis, Università degli studi di Padova, 2016. http://hdl.handle.net/11577/3424381.

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Foods are complex ecosystems, due to the influence of either intrinsic and extrinsic factors such as the chemical composition, microbial communities and the environment that can have an effect on the final product. In cheese microbes are the most influencing factor because they can effect both shelf-life and quality flavor/taste of the food. In addition microbiome establishes complex interactions within the bacterial community itself and between the food environment, such that nowadays these dynamics have been only partially highlighted with traditional culture-dependent technique. Thus, cultu

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14

OLIVEIRA, Amanda de Moraes. "Desenvolvimento de Bebida Láctea Sabor Graviola com Potencial Atividade Funcional." Universidade Federal de Pernambuco, 2012. https://repositorio.ufpe.br/handle/123456789/11943.

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Submitted by Lucelia Lucena (lucelia.lucena@ufpe.br) on 2015-03-11T17:13:39Z No. of bitstreams: 2 Tese - Amanda de Morais Oliveira.pdf: 1765130 bytes, checksum: 5bf15330c9dfc4a3692f9780af49731b (MD5) license_rdf: 1232 bytes, checksum: 66e71c371cc565284e70f40736c94386 (MD5)<br>Made available in DSpace on 2015-03-11T17:13:39Z (GMT). No. of bitstreams: 2 Tese - Amanda de Morais Oliveira.pdf: 1765130 bytes, checksum: 5bf15330c9dfc4a3692f9780af49731b (MD5) license_rdf: 1232 bytes, checksum: 66e71c371cc565284e70f40736c94386 (MD5) Previous issue date: 2012-08-31<br>FACEPE<br>As bebidas láctea

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15

Rodrigues, André. "O papel dos microfungos associados aos jardins das formigas Attini (Hymenoptera: Formicidae) /." Rio Claro : [s.n.], 2009. http://hdl.handle.net/11449/103936.

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Resumo: As formigas da tribo Attini são conhecidas pela complexa simbiose que mantêm com fungos, os quais cultivam como alimento. É sabido que além desse fungo, outros microrganismos podem ser encontrados nos ninhos desses insetos e estudos prévios apontaram que alguns microfungos (i.e. leveduras e fungos filamentosos) podem ser importantes nessa simbiose. O objetivo do presente trabalho foi avaliar o papel desses microfungos associados aos jardins dessas formigas. Analisando várias espécies do gênero Acromyrmex do sul do Brasil, demonstrou-se que as formigas importam uma comunidade diversa de

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16

Haesler, Felix. "Microbial biocontrol of the pathogen Phytophthora citricola in the rhizosphere of European beech (Fagus sylvatica L.) : impact of elevated O 3 and CO 2 on the antagonistic community structure and function." kostenfrei, 2008. http://mediatum2.ub.tum.de/doc/645803/645803.pdf.

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17

Bleicher, Anne [Verfasser]. "Antagonistic activity of complex cheese surface microbial consortia against food-borne pathogens / Anne Bleicher." 2010. http://d-nb.info/1006359028/34.

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18

Miller, Eric Louis. "Evolution of microbial populations with spatial and environmental structure." Thesis, 2010. http://hdl.handle.net/2152/ETD-UT-2010-05-1018.

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Rarely are natural conditions constant, but generally biologists study microbes in artificially constant environments in the laboratory. I relaxed these assumptions of constant environments through time and space as I investigated how microbial populations evolve. First, I examined how bacteriophage evolved in the presence of permissive and nonpermissive hosts. I found that bacteriophage evolved discrimina- tion in mixed environments as well as in one of two environments with homogeneous, permissive hosts. This showed the asymmetry of host-shifting in viruses as well as the possibility of larg

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19

Reeh, Kevin. "Commercial Bumble Bees as Vectors of the Microbial Antagonist Clonostachys rosea for Management of Botrytis Blight in Wild Blueberry (Vaccinium angustifolium)." Thesis, 2012. http://hdl.handle.net/10222/15008.

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Greenhouse and laboratory experiments in 2011 determined that Clonostachys rosea can effectively prevent Botrytis cinerea infection in Vaccinium angustifolium blossoms. In vitro testing demonstrated that C. rosea germination was not significantly affected by the presence of Switch®, but was by either Pristine® or Maestro®. Field experiments completed during the summer of 2010 and 2011 indicated that the dispenser designs tested had no significant effects on Bombus impatiens foraging behaviours, aside from hive-activity. There was also no difference in the quantity of C. rosea applied by each t

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20

Haesler, Felix [Verfasser]. "Microbial biocontrol of the pathogen Phytophthora citricola in the rhizosphere of European beech (Fagus sylvatica L.) : impacts of elevated O3 and CO2 on the antagonistic community structure and function / Felix Haesler." 2008. http://d-nb.info/98986667X/34.

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21

Pinto, Cátia Carvalho. "Selecção e caracterização molecular de bactérias potenciais agentes de controlo biológico de Phytophthora cinnamomi Rands." Master's thesis, 2011. http://hdl.handle.net/10348/3082.

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Dissertação de Mestrado em Genética Molecular Comparativa e Tecnológica<br>Phytophthora cinnamomi é um fitopatogéneo do solo altamente difundido que está associado à doença da tinta dos castanheiros. Apesar dos esforços para controlo desta doença através da aplicação de fungicidas específicos, estes não se têm revelado eficazes. Assim, os agentes de controlo biológico (BCA) têm-se tornado uma alternativa de crescente interesse aos fungicidas. Este trabalho teve como objectivo o isolamento e screening de isolados bacterianos com actividade antagonista para com P. cinnamomi. A actividade a

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