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Dissertations / Theses on the topic 'Indirect plant growth promotion'

Author: Grafiati

Published: 3 June 2025

Last updated: 31 July 2025

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1

Mangmang, Jonathan S. "Plant growth promotion by rhizobacteria in aquaponics." Thesis, The University of Sydney, 2015. http://hdl.handle.net/2123/14863.

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Wastewater or fish effluent (FE) from freshwater aquaculture can be a good and cheap liquid fertiliser for plants. However, while it represents a good source of nutrients to support plant growth in a system called aquaponics, it appears that its use needs to be optimised to take full advantage of the potential benefits. Apart from mineral amendments, the use of beneficial microorganisms that can have a direct impact on plant growth and nutrient utilisation could be a promising option. Plant growth promoting rhizobacteria (PGPR) are a group of rhizospheric bacteria, when introduced in associati

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2

Penrose, Donna. "The role of ACC deaminase in plant growth promotion." Thesis, National Library of Canada = Bibliothèque nationale du Canada, 2000. http://www.collectionscanada.ca/obj/s4/f2/dsk3/ftp04/nq53509.pdf.

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3

Alsohim, Abdullah S. M. "Characterization of bacterial genes involved in motility, plant colonization and plant growth promotion." Thesis, University of Reading, 2010. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.541967.

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4

Cepeda, Maria Veronica. "Effects of Microbial Inoculants on Biocontrol and Plant Growth Promotion." The Ohio State University, 2012. http://rave.ohiolink.edu/etdc/view?acc_num=osu1345239027.

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5

Hu, Chia-Hui Kloepper Joseph. "Induction of growth promotion and stress tolerance in arabidopsis and tomato by plant growth-promoting." Auburn, Ala., 2005. http://repo.lib.auburn.edu/2005%20Summer/doctoral/HU_CHIA-HUI_54.pdf.

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6

Majumdar, Sukanta. "Evaluation of jute rhizospheric bacteria for plant growth promotion and disease suppression." Thesis, University of North Bengal, 2017. http://ir.nbu.ac.in/hdl.handle.net/123456789/2570.

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7

Puri, Akshit. "Plant growth promotion and nitrogen fixation by Paenibacillus polymyxa in corn and canola." Thesis, University of British Columbia, 2015. http://hdl.handle.net/2429/54135.

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Availability of nitrogen is the most yield-limiting mineral factor in crop production. Several Paenibacillus bacterial strains that were able to fix nitrogen from atmosphere were isolated from extracts of surface-sterilized lodgepole pine seedling and tree tissues. One strain, Paenibacillus polymyxa P2b-2R, was found to derive high amounts of nitrogen from the atmosphere when introduced into gymnosperm species, namely lodgepole pine and western red cedar. I wanted to determine if Paenibacillus polymyxa P2b-2R could colonize, fix nitrogen and promote the growth of important agricultural crops s

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Suarez, Franco Christian [Verfasser]. "Isolation of rhizobacteria from salt tolerant plant species and evaluation of their plant growth-promotion / Christian Suarez Franco." Gießen : Universitätsbibliothek, 2015. http://d-nb.info/1080476024/34.

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9

Nieto-Jacobo, Maria F., Johanna M. Steyaert, Fatima B. Salazar-Badillo, et al. "Environmental Growth Conditions of Trichoderma spp. Affects Indole Acetic Acid Derivatives, Volatile Organic Compounds, and Plant Growth Promotion." FRONTIERS MEDIA SA, 2017. http://hdl.handle.net/10150/622867.

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Trichoderma species are soil-borne filamentous fungi widely utilized for their many plant health benefits, such as conferring improved growth, disease resistance and abiotic stress tolerance to their hosts. Many Trichoderma species are able to produce the auxin phytohormone indole-3-acetic acid (IAA), and its production has been suggested to promote root growth. Here we show that the production of IAA is strain dependent and diverse external stimuli are associated with its production. In in vitro assays, Arabidopsis primary root length was negatively affected by the interaction with some Trich

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10

Mwita, Liberata. "Bioinformatic and biotechnological study of biocontrol Bacillus suitable for crop protection and plant growth promotion." Thesis, University of Pretoria, 2017. http://hdl.handle.net/2263/65922.

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The main focus of this research was to study in detail the selected plant growth promoting bacteria (PGPR) from Bacillus group. PGPR have been described as possible solution to the negative effects of chemicals fertilizers experienced by human beings, other living organisms and the environment through reducing or replacing the use of chemical fertilizers and pesticides. The work aimed at finding plant promotion and plant protection activity of selected PGPR species. Different bioassays were performed in the laboratory and greenhouse to find if the selected bacteria promote plant growth and pro

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Mia, Junaid. "Isolation and characterization of plant growth promoting endophytic bacteria from Eriocephalus africanus roots]." University of the Western Cape, 2018. http://hdl.handle.net/11394/6260.

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Magister Scientiae - MSc (Biotechnology)<br>Endophytic bacteria are known to have an endosymbiotic relationship with plants and provide them with many beneficial properties. These bacteria stimulate plant hormones, provide protection from pathogens and increase nutrient availability in the environment. In this study some of these potential growth factors were tested. Endophytic bacteria have the potential to be of great value for the increase of crop production. They offer a variety of processes that aid in plant growth promotion in an ecofriendly manner. The use of endophytic bacteria provide

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Le, Cocq Kate Frances. "Engineering the biological control and plant growth promotion fitness of Trichoderma hamatum GD12 through genetic manipulation." Thesis, University of Exeter, 2012. http://hdl.handle.net/10036/4161.

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Trichoderma species are ubiquitous soil saprotrophs and well-characterized biological control agents. Certain strains have also been shown to stimulate plant growth through the production of bioactive secondary metabolites, and are therefore receiving increased attention as natural plant growth stimulants. Previous research at the University of Exeter (Ryder et al. (2012) Microbiology 158, 84-97) has shown that the Plant Growth Promotion activity of a biocontrol strain of Trichoderma hamatum (strain GD12) can be dramatically enhanced by targeted mutation of the N-acetyl-β-D-glucosaminidase-enc

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13

Juraeva, Dilafruz. "Study the possible mechanisms of plant growth promotion by wheat diazotrophic bacteria grown in Uzbekistan soil." Doctoral thesis, Humboldt-Universität zu Berlin, Landwirtschaftlich-Gärtnerische Fakultät, 2011. http://dx.doi.org/10.18452/16326.

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Das Pflanzenwachstum fördernde Bakterien (PGPB) kommen ubiquitär sowohl an der Wurzel als auch am Spross der Pflanzen vor und sie können über direkte oder indirekte Mechanismen einen bedeutenden Beitrag zur Stickstoffernährung der Pflanzen leisten. Die vorliegende Arbeit umfasst a) die Isolierung von PGPB, welche das Wachstum verschiedener Pflanzenarten fördern und durch Fusarien verursachte Pflanzenkrankheiten bekämpfen, b) die Analyse der Möglichkeiten Probleme der Pflanzenernährung durch den Einsatz von PGPB zu lösen, c) die Entwicklung neuer molekularbiologischer Methoden zur Messung der D

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14

Timmusk, Salme. "Mechanism of Action of the Plant Growth Promoting Bacterium Paenibacillus polymyxa." Doctoral thesis, Uppsala universitet, Institutionen för cell- och molekylärbiologi, 2003. http://urn.kb.se/resolve?urn=urn:nbn:se:uu:diva-3773.

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Paenibacillus polymyxa belongs to the group of plant growth promoting rhizobacteria (PGPR). Activities associated with P. polymyxa-treatment of plants in earlier experiments include, e.g., nitrogen fixation, soil phosphorus solubilization, production of antibiotics, auxin, chitinase, and hydrolytic enzymes, as well as promotion of increased soil porosity. My thesis work showed that, in stationary phase, P. polymyxa released the plant hormone cytokinin isopentenyladenine, in concentrations of about 1.5 nM. In a gnotobiotic system with Arabidopsis thaliana as a model plant, it was shown that P.

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15

Kotze, Liske Marinate. "An investigation into the effects of smoke-water and GR24 on the growth of nicotiana benthamiana seedlings." Thesis, Stellenbosch : University of Stellenbosch, 2010. http://hdl.handle.net/10019.1/5215.

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Thesis (MSc (Plant Biotechnology))--University of Stellenboscg, 2010.<br>Includes bibliography.<br>Title page: Dept. of Genetics, Faculty of Natural Sciences.<br>ENGLISH ABSTRACT: Novel plant growth regulating substances (PGRs) are emerging as a useful tool to investigate important growth traits in plants. This study reports on growth promotion pathways leading to enhanced biomass accumulation in two PGRs sharing a common α, β-unsaturated furanone moiety. Growth promotion by GR24, a synthetic strigolactone, and an aqueous smoke solution (including the active compound, KAR1) in physiologically

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Harris, Beverley Dawn. "The molecular characterisation of Trichoderma hamatum effects on plant growth and biocontrol." Thesis, University of Exeter, 2013. http://hdl.handle.net/10871/14541.

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Expanding global populations, unequal food distribution and disease pressure suggest food poverty is increasing. Consequently, much attention is focussed on alternative natural methods in which to increase agricultural yield. Previously, it was observed that Trichoderma hamatum strain GD12 and its respective N-acetyl-β-D-Glucosamine mutant ∆Thnag:hph promoted plant biomass and fitness that, as a result, may provide a credible natural alternative to synthetic fertilisers. However, on a molecular level, the manner in which this is achieved has not been fully elucidated. In this thesis, I report

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Ashraf, Zakira Naureen. "Identification of rhizobacteria from rice and maize for plant growth promotion and biological control of rice diseases." Thesis, Lancaster University, 2007. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.578244.

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The scope of this study was the selection of bacterial strains from rice and maize and evaluation of their potential for plant growth promotion and biological control of rice diseases. 103 bacterial strains isolated from roots, rhizosphere and soil of rice and maize were assayed for production of siderophores, antibiotics, hydrolytic enzymes and HCN. From these, 33 strains were found to produce siderophores, eight were capable of producing diffusible antibiotics and four produced volatile antibiotics, while only one strain was found to produce HCN. Dual culture antagonistic assays were used to

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18

Sevilla, Myrna Quijano, and Myrna Quijano Sevilla. "Acetobacter diazotrophicus, a nitrogen-fixing bacterial endophyte of sugarcane: Analysis of nifHDK genes, plant colonization, and growth promotion." Diss., The University of Arizona, 1999. http://hdl.handle.net/10150/284150.

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Acetobacter diazotrophicus, a nitrogen-fixing bacterial endophyte, is believed to be responsible for biological nitrogen fixation (BNF) in sugarcane. However, no monocot has yet been unequivocally shown to receive fixed N through BNF. The main question addressed in this dissertation is whether A. diazotrophicus promotes plant growth, and if so, whether growth promotion is via BNF. Another question is whether the growth benefits can be extended to other grasses. To answer these questions, the nifHDK genes encoding the protein subunits of the nitrogenase enzyme were first isolated and sequenced.

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Zanella, Filippo Giacomo. "Plant growth promotion and biocontrol traits of Vitis vinifera "Glera" bacterial endophytes in the sustainable management of viticulture." Doctoral thesis, Università degli studi di Padova, 2018. http://hdl.handle.net/11577/3424989.

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This thesis describes the results obtained during the three years PhD course which was focused on plant-bacteria interactions, in particular Vitis vinifera cultivar Glera and endophytes, previously isolated from the same plant species. The project aimed to investigate the possible beneficial effects that four selected endophyte strains, belonging to Pantoea and Bacillus genera, can give to Glera rooting cuttings and their potential utility as environmental-friendly alternative approach in plant growth promotion, stress alleviation, and biocontrol. The project was prompted to reduce the extens

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20

Hough, Ashley Rose. "The indirect and direct effects of temperature and host plant resistance on population growth of soybean aphid (Aphis glycines) biotype 1." Thesis, Kansas State University, 2016. http://hdl.handle.net/2097/32584.

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Master of Science<br>Department of Entomology<br>James R. Nechols<br>Temperature has an important indirect impact on pest populations. Direct effects occur, but also may result from temperature-induced changes in plant quality, including the expression of host plant resistance traits. Therefore, I examined both indirect and direct effects of temperature on biotype 1 soybean aphids (SBA), Aphis glycines, on a Rag1-resistant soybean variety and compared the effects with a susceptible variety to gain a better understanding of how temperature impacts SBA. Four aphid responses were evaluated: preim

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21

SHAHZAD, GUL I. RAYNA. "BIOCONTROL STRATEGIES AGAINST PLANT PATHOGENS." Doctoral thesis, Università degli Studi di Milano, 2021. http://hdl.handle.net/2434/850186.

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It is a known fact that the whole agriculture system is suffering from the diseases caused by plant pathogens, affecting negatively the crop yield production, food security, biodiversity, agricultural ecosystem and hence agricultural economy. In many countries, the containment strategies of plant pathogens are still depending on chemical pesticides that cause adverse effects in the long term. According to the implementations reinforced by European council 2009/128/EC, biocontrol strategies are considered as the most profound and integrated approach for sustainable disease management. Defining

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22

Moller, Leandra. "Soil yeasts, mycorrhizal fungi and biochar: their interactions and effect on wheat (Triticum aestivum L.) growth and nutrition." Thesis, Stellenbosch : Stellenbosch University, 2012. http://hdl.handle.net/10019.1/20417.

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Thesis (MSc)--Stellenbosch University, 2012.<br>ENGLISH ABSTRACT: In order to test the effect of different plant growth-promoting strategies on Triticum aestivum L. (wheat), we investigated the ability of biochar and a grain-associated soil yeast, to improve the growth of this crop. Our first goal was to study the effect of biochar amendments to sandy soil on the growth and nutrition of wheat in the presence of mycorrhizal fungi. This was accomplished by amending soil with 0%, 1%, 2.5%, 5% and 10% (w/w) biochar and cultivating wheat plants in these soil-biochar mixtures. After harvesting

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23

Budiharjo, Anto. "Plant-bacteria interactions." Doctoral thesis, Humboldt-Universität zu Berlin, Mathematisch-Naturwissenschaftliche Fakultät I, 2011. http://dx.doi.org/10.18452/16333.

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Bacillus amyloliquenaciense FZB42 ist ein bekanntes Pflanzenwachstum-stimulierendes Rhizobakterium. Es produziert neben einer Vielzahl an Sekundärmetaboliten mit antibakterieller und antifungaler Wirkung, auch das Pflanzenhormon IAA. Obwohl viele dieser Mechanismen diskutiert werden, ist wenig darüber bekannt, auf welche Weise die Bakterien das Pflanzenwachstum fördern. In dieser Arbeit wurde eine Transposonmutagenese mithilfe des ‘mariner-transposons’ durchgeführt, und so eine Transposonbibliothek erstellt. Diese wurde dann auf geeignete Phänotypen untersucht, um die Gene zu finden, welche be

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Juraeva, Dilafruz [Verfasser], Eckhard [Akademischer Betreuer] George, and Silke [Akademischer Betreuer] Ruppel. "Study the possible mechanisms of plant growth promotion by wheat diazotrophic bacteria grown in Uzbekistan soil / Dilafruz Juraeva. Gutachter: Eckhard George ; Silke Ruppel." Berlin : Humboldt Universität zu Berlin, Landwirtschaftlich-Gärtnerische Fakultät, 2011. http://d-nb.info/1015081428/34.

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Juraeva, Dilafruz [Verfasser], Eckhard [Gutachter] George, and Silke [Gutachter] Ruppel. "Study the possible mechanisms of plant growth promotion by wheat diazotrophic bacteria grown in Uzbekistan soil / Dilafruz Juraeva ; Gutachter: Eckhard George, Silke Ruppel." Berlin : Humboldt-Universität zu Berlin, 2011. http://d-nb.info/1208076892/34.

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Dorighello, Dalton Vinicio [UNESP]. "Versatilidade de Bacillus spp. no controle biológico de doenças de plantas e na promoção de crescimento de soja." Universidade Estadual Paulista (UNESP), 2017. http://hdl.handle.net/11449/151203.

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Submitted by DALTON VINICIO DORIGHELLO null (dalton.agro@gmail.com) on 2017-07-25T18:25:06Z No. of bitstreams: 1 Tese_Dalton_Full.pdf: 1625459 bytes, checksum: 611798bdc85fac0d6be873371b1b7834 (MD5)<br>Approved for entry into archive by Luiz Galeffi (luizgaleffi@gmail.com) on 2017-07-26T18:15:06Z (GMT) No. of bitstreams: 1 dorighello_dv_dr_bot.pdf: 1625459 bytes, checksum: 611798bdc85fac0d6be873371b1b7834 (MD5)<br>Made available in DSpace on 2017-07-26T18:15:06Z (GMT). No. of bitstreams: 1 dorighello_dv_dr_bot.pdf: 1625459 bytes, checksum: 611798bdc85fac0d6be873371b1b7834 (MD5) Previous

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Battistus, Andre Gustavo. "Inoculação via semente e foliar de Azospirillum brasilense associado ao tratamento de sementes com bioativador na cultura do milho." Universidade Estadual do Oeste do Paraná, 2015. http://tede.unioeste.br:8080/tede/handle/tede/1259.

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Made available in DSpace on 2017-07-10T17:36:59Z (GMT). No. of bitstreams: 1 Andre_Gustavo_Battistus.pdf: 1616847 bytes, checksum: 70a506c626b68378edefb97e8b5fdfe4 (MD5) Previous issue date: 2015-02-24<br>Coordenação de Aperfeiçoamento de Pessoal de Nível Superior<br>The maize is a cereal with high economic importance due to its magnitude forms of use. Increasing productivity levels, promoting substances plant development are highlighted role in contemporary agriculture, arising from biological or chemical origin. However, the lack of results regarding the joint use of these promoters lead

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Aniceto, Rafael Martins. "Modulação da comunidade bacteriana associada ao milho (Zea mays L.) através da inoculação de bactérias promotoras de crescimento de plantas." Universidade de São Paulo, 2016. http://www.teses.usp.br/teses/disponiveis/11/11137/tde-06012017-155312/.

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O uso de fertilizantes minerais é de grande importância para que a cultura atinja o seu potencial produtivo e torne a atividade de produção viável economicamente, no entanto o uso excessivo é danoso ao meio ambiente, trazendo riscos à saúde humana e à biodiversidade local. A utilização de bactérias promotoras de crescimento de plantas (BPCP) tem se mostrado uma alternativa promissora e sustentável, visando melhorar a produtividade e reduzir o uso de fertilizantes. Essas bactérias colonizam a rizosfera e tecidos internos da planta e são capazes de estimular o desenvolvimento e sanidade de sua h

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Pinto, Junior Artur Soares. "Doses de inoculante e estirpes de Azospirillum brasilense associadas à adubação nitrogenada na cultura do milho." Universidade Estadual do Oeste do Paraná, 2013. http://tede.unioeste.br:8080/tede/handle/tede/1448.

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Made available in DSpace on 2017-07-10T17:40:45Z (GMT). No. of bitstreams: 1 2013_Tese_Artur_Soares_Pinto_Junior.pdf: 2331670 bytes, checksum: 52ad524e589731704df1d7ee73bb2992 (MD5) Previous issue date: 2013-06-28<br>Conselho Nacional de Desenvolvimento Científico e Tecnológico<br>This study aimed to evaluate under field conditions in different areas of southern Brazil, the effect associated with mineral fertilizers and different dosages of inoculant formulated from the strains Ab-V5, V6 and Ab-Ab-V7 of Azospirillum brasilense. The experimental design was randomized blocks with four blocks

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Castro, Renata Assis. "Estudo da comunidade bacteriana endofítica cultivável associada aos manguezais de Cananéia e Bertioga SP." Universidade de São Paulo, 2011. http://www.teses.usp.br/teses/disponiveis/64/64133/tde-22032012-145555/.

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Os manguezais são ecossistemas encontrados na transição entre os ambientes terrestre e marinho apresentando uma biodiversidade funcional única e conseqüentemente flora e fauna específica. Por se tratar de um ambiente inóspito e pouco explorado é de grande importância o estudo desta comunidade a fim de se obter isolado com potencial biotecnológico. Sabe-se que tecidos vegetais são habitados por microrganismos denominados endofíticos, cuja interação com a planta hospedeira pode conferir características vantajosas ao mesmo. Este trabalho teve como objetivo estudar a comunidade bacteriana endofíti

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Rocha, Renata Kühl. "Solubilização in vitro de fosfato por Torulaspora globosa." Universidade Federal de São Carlos, 2017. https://repositorio.ufscar.br/handle/ufscar/9149.

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Submitted by Bruna Rodrigues (bruna92rodrigues@yahoo.com.br) on 2017-10-04T13:31:39Z No. of bitstreams: 1 DissRKR.pdf: 1036463 bytes, checksum: 2c845de1e471e5e42f4a7e8591961fc9 (MD5)<br>Approved for entry into archive by Ronildo Prado (producaointelectual.bco@ufscar.br) on 2017-10-10T20:14:17Z (GMT) No. of bitstreams: 1 DissRKR.pdf: 1036463 bytes, checksum: 2c845de1e471e5e42f4a7e8591961fc9 (MD5)<br>Approved for entry into archive by Ronildo Prado (producaointelectual.bco@ufscar.br) on 2017-10-10T20:14:25Z (GMT) No. of bitstreams: 1 DissRKR.pdf: 1036463 bytes, checksum: 2c845de1e471e5e42f4a

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Tschoeke, Bruno Augusto Prohmann. "Monitoramento da interação entre rizobactéria RZ2MS16 (Burkholderia ambifaria) promotora de crescimento e bioinoculantes comerciais aplicados nas culturas de soja e milho." Universidade de São Paulo, 2016. http://www.teses.usp.br/teses/disponiveis/11/11138/tde-05072016-160308/.

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As culturas da soja e milho são de grande importância econômica mundial e também para o Brasil, onde a área cultivada com essas duas culturas está estimada em 45.855.900 mil hectares, distribuídas em todos estados produtores conforme suas características. A estimativa da safra mundial de soja em 2015/16 apresentou uma redução na produção global da oleaginosa para 319,0 milhões de ton, volume 1,1 milhão de ton inferior ao levantamento de dezembro de 2015. Ainda assim, trata-se de um volume recorde. Para o milho, a produção global foi de 967,9 milhões de ton, com uma redução no volume de 5,9 mil

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Seid, Eshetu Ahmed. "Wirkungen des Rhizobakteriums Bacillus subtilis auf den Befall von Tomatenpflanzen durch Wurzelgallen- (Meloidogyne spp.) und Wurzelläsions-Nematoden (Pratylenchus spp.)." Doctoral thesis, Humboldt-Universität zu Berlin, Landwirtschaftlich-Gärtnerische Fakultät, 1999. http://dx.doi.org/10.18452/14476.

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Untersuchungen wurden durchgeführt, um die Wirkung von B. subtilis und deren Metaboliten auf den Meloidogyne- und Pratylenchus-Befall und ihre Vermehrung festzustellen sowie um die möglichen Wirkmechanismen zu studieren. Substratbehandlungen mit B. subtilis FZB 24® führten zu einem höherenMeloidogyne-Befall und einer verstärkten Nematodenvermehrung. Trotz verstärktem Befall wurde das Pflanzenwachstum verbessert (induzierte Toleranz). Weiterhin wurden durch "antibiotikafreie" Kulturfiltrate (KF) aus der bakterielen Übergangs- und stationären Phase ähnliche Wirkungen erzielt. Außerdem wurde

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Ben, M'henni Yosra. "Gestion de la maladie de dépérissement du pommier : criblage in vitro et in planta des activités protectrices d’une collection de microorganismes contre les Pythiacées et caractérisation chimique du principal actif produit par l’isolat A. westerdijkiae A7 Biocontrol and growth promotion potential of combined application of Trichoderma simmonsii and Aspergillus westerdijkiae in Apple root stock dieback." Thesis, université Paris-Saclay, 2020. http://www.theses.fr/2020UPASS127.

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Le dépérissement du pommier est une maladie tellurique causée par plusieurs espèces Pythiacée. Il est responsable de graves dommages et de pertes d'arbres dans de nombreux vergers en Tunisie. Comme la lutte chimique contre cette maladie pose des problèmes éco toxicologiques et les moyens prophylactiques ont des efficacités limitées, d’autres moyens de lutte sont activement recherchés. L’objectif de cette thèse était d’identifier un nouvel agent de lutte biologique contre les oomycètes responsables de cette maladie à partir d’une collection d’isolats fongiques et bactériens Tunisiens comme alte

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Czarny, Jennifer Claire. "Effects of a bacterial ACC deaminase on plant growth-promotion." Thesis, 2008. http://hdl.handle.net/10012/4069.

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Plants often live in association with growth-promoting bacteria, which provide them with several benefits. One such benefit is the lowering of plant ethylene levels through the action of the bacterial enzyme 1-aminocyclopropane-1-carboxylic acid (ACC) deaminase that cleaves the immediate biosynthetic precursor of ethylene, ACC. The plant hormone ethylene is responsible for many aspects of plant growth and development but under stressful conditions ethylene exacerbates stress symptoms. The ACC deaminase-containing bacterium Pseudomonas putida UW4, isolated from the rhizosphere of reeds, is a po

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Hsu, Chao-Lian, and 徐肇良. "Characterization of mechanism for growth promotion effect derived from Micrococcus plant growth promoting rhizobacteria." Thesis, 2018. http://ndltd.ncl.edu.tw/handle/kzjnew.

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碩士<br>國立嘉義大學<br>生物農業科技學系研究所<br>106<br>Plant growth-promoting rhizobacteria (PGPR) may promote plant growth via various mechanisms. In this study, Micrococcus sp. was isolated (designated as S14). This bacterial strain was characterized to have ability of producing IAA, and solubilizing phosphorus. In Arabidopsis, S14 induced growth of lateral roots and root hair, increased shoot growth and induced flowering. In Brassica rapa, S14 increased antioxidant activity and chlorophyll contents, and reduced the content of malonaldehyde (MDA), a membrane lipid peroxidation product, and nitrate accumulati

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Chiang, Hsing-Mei, and 江幸鎂. "Application of Endophytes on Biocontrol and Plant-Growth Promotion of Bananas." Thesis, 2011. http://ndltd.ncl.edu.tw/handle/63u4jd.

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碩士<br>國立中興大學<br>生命科學系所<br>99<br>Previously, microorganisms used on biocontrol depended mostly on rhizobacteria. However, since the rhizobacteria were easily influenced by the eviromental factors, such as climate and other microorganisms…etc, the study of endophytes becomes attractive topic for researchers. Endophytes are microorganisms that live intercellular or intracellular in plants but won’t harmful to plants. Endophytes can widely use on agriculture, for example biocontrol, plant-growth promotion, and phytoremediation…etc. On the other hand, Fusarium wilt of banana is a soilborne plant di

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Kordbacheh, Farzaneh. "Promotion of mammalian angiogenesis by plant-derived secondary metabolites." Phd thesis, 2013. http://hdl.handle.net/1885/156123.

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Historically, plant natural products and their derivatives have been invaluable sources of therapeutic agents to enhance human health and to treat disease. Angiogenesis is a complex and highly regulated process of generating new capillary networks from mature blood vessels. Failure to grow blood vessels has been reported to be associated with diseases including stroke, cardiovascular disorders and wound healing. However, pro-angiogenic drugs are less researched than anti-angiogenic drugs. Soybean is a source of nutrition and it contains a number of small metabolites that confer many beneficial

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Yobo, Kwasi Sackey. "Biological control and plant growth promotion by selected trichoderma and Bacillus species." Thesis, 2005. http://hdl.handle.net/10413/5335.

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Various Trichoderma and Bacillus spp. have been documented as being antagonistic to a wide range of soilborne plant pathogens, as well as being plant growth stimulants. Successes in biological control and plant growth promotion research has led to the development of various Trichoderma and Bacillus products, which are available commercially. This study was conducted to evaluate the effect of six Trichoderma spp. and three Bacillus spp. and their respective combinations, for the biological control of Rhizoctonia solani damping-off of cucumber and plant growth promotion of dry bean (Phaseolus vu

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Cardoso, Paulo Jorge da Rocha. "Bacterial-induced plant growth promotion under drought: the importance of airborne communication." Doctoral thesis, 2019. http://hdl.handle.net/10773/30179.

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Plants harbor bacteria which can provide them with benefits such as growth promotion, enhancement of nutrient uptake, defense against pathogens and predators, and improvement of tolerance to abiotic factors such as drought. The development of biotechnological applications using these bacteria has been the focus of research and interest from the scientific community and agricultural sector. While crops have received significant attention, plant species growing in natural environments were neglected and should also be explored. This is particularly important in the paradigm of climate change and

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Sreevidya, M. "Isolation and characterization of microbes for plant growth-promotion and biocontrol properties." Thesis, 2015. http://oar.icrisat.org/9132/1/Thesis%20of%20Sreevidya.pdf.

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Chickpea and sorghum are the two important crops grown in semi-arid tropics; several biotic factors were influencing the growth and yield of these crops. Chemical control is generally used to control the damage, but the indiscriminate use of chemicals lead to negative impacts on nature. Biological control is the safe and alternative method to control the pathogens as well as to promote plant growth, in which plant growth-promoting (PGP) microbes were used. In the present study, a total of 89 actinomycetes, 74 bacteria and 48 fungi were isolated from chickpea rhizosphere soil and vermicompost.

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Chen, Yi-Ru, and 陳怡如. "Characterization of phosphate-solubilizing yeast strains in Taiwan for phosphate solubilization and plant growth promotion." Thesis, 2018. http://ndltd.ncl.edu.tw/handle/265y2f.

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碩士<br>國立彰化師範大學<br>生物學系<br>106<br>Phosphorus (P) is an important macronutrient required for plant growth. The dominant form of phosphorous and the form most readily taken up by roots is the monovalent orthophosphate anion H2PO4− and HPO42−. However, the inorganic phosphate is easily combined with the elements of calcium, iron and aluminum in the soil solution. About 70% to 99% of the phosphate fertilizer will be precipitated in the form of minerals, and can not be absorbed by plants. Fortunately, phosphate solubilizing microbes (PSM) possess the ability to solubilize sparingly soluble phosphat

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KURNIAWAN, ANDI. "Exploration of Potential Benefit Effect of Plant Growth Promotion by Rhizobacteria and Soybean Protein Hydrolysate." Thesis, 2018. http://ndltd.ncl.edu.tw/handle/293q7y.

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碩士<br>國立嘉義大學<br>農業科技全英碩士學位學程<br>106<br>Abstract Reactive oxygen species (ROS) molecules can serve as signaling molecules or cause oxidative damage to the tissues that would depend on the delicate equilibrium between ROS production, and their scavenging activity to reduce ROS level. Biostimulants are natural compounds or microorganisms that can promote plant growth. Plant growth promoting rhizobacteria and soybean protein hydrolysate (SPH) are different kinds of biostimulants. In this study, Bacillus sp. WA strain and protein hydrolysate generated by the same bacterial species were used to trea

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Rocha, Ricardo Alexandre. "Bacteria associated to the roots of Phaseolus vulgaris L. at different development stages: diversity and plant growth promotion." Master's thesis, 2021. http://hdl.handle.net/10773/33366.

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World population is increasing, and it is expected that this increase will impose a major pressure on food production. The present methodologies of agricultural production are vulnerable to the unstable climate that is predicted to increase, in addition to other growing pressures such as increasing urbanization, industrialization, and agrochemical pollution. As a result, agricultural production needs to be increased, for achieving food security and meet the sustainable development goals formulated by the United Nations. The common bean (Phaseolus vulgaris L.) is one of the most produced legume

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Sun, Yili. "The role of ACC deaminase in plant growth promotion by the endophytic bacterium Burkholderia phytofirmans PsJN." Thesis, 2008. http://hdl.handle.net/10012/3832.

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The endophytic bacterium Burkholderia phytofirmans PsJN has been previously shown to promote plant growth. This bacterium produces siderophores, indoleacetic acid (IAA) and the enzyme 1-aminocyclopropane-1-carboxylate (ACC) deaminase, all of which have previously been implicated in the promotion of plant growth by bacteria. Following isolation of the ACC deaminase gene (acdS), AcdS deficient mutants of PsJN were generated. One mutant contains a tetracycline resistance gene inserted into acdS, and the other mutant contains a deletion in the acdS gene. Both of the mutants showed no detectable AC

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Soussi, Asma. "Potential of Bacterial Volatile Organic Compounds for Biocontrol of Fungal Phytopathogens and Plant Growth Promotion Under Abiotic Stress." Diss., 2018. http://hdl.handle.net/10754/628055.

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Bacterial volatile organic compounds (VOCs) are signal molecules that may have beneficial roles in the soil-plant-microbiome ecosystem. In this Ph.D. thesis, I aimed to assess and characterize the role of bacterial VOCs in plant tolerance to drought and in the biocontrol of fungal pathogens. I started by studying two root endophytic bacteria isolated from pepper plants cultivated under desert farming conditions. They showed an enhancement of pepper tolerance to drought stress and an amelioration of its physiological status. Moreover, they induced the expression of a vacuolar pyrophosphatase p

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Hermanto, Kenny, and 吳懇良. "Biological control of Phytophthora root rot and Plant Growth Promotion in Sweet Pepper by Bacillus subtilis WMA1." Thesis, 2019. http://ndltd.ncl.edu.tw/handle/ecd6t6.

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碩士<br>國立中興大學<br>國際農學碩士學位學程<br>107<br>Sweet peppers are one of the important vegetables crops worldwide including Indonesia. The large amount of peppers in Indonesia are grown for export market. Phytophthora capsici is an important disease which represents a serious threat to peppers production worldwide. The objectives of my study were to develop a Bacillus-based biocontrol agent to control Phytophthora root rot disease and to evaluate their ability to promote plant growth in sweet pepper. Bacillus subtilis strain WMA1 produced certain hydrolytic enzymes such as cellulase, protease, amylase, a

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Santos, Beatriz Antunes. "Rhizobacterial promotion of maize growth and drought tolerance: perpectives from the laboratory, greenhouse and field." Master's thesis, 2021. http://hdl.handle.net/10773/33355.

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Due to climate changes, global temperature is projected to increase 1.5 °C or more. Consequentially, drought is expected to impact over 50% of the arable lands by 2050, affecting several crops, including maize, which is the third main food crop in the world. In fact, maize yield globally is expected to suffer a reduction of 15% because of drought stress. On the other hand, world population is predicted to reach 9 billion by 2050. Thus, there is the need to ensure food availability and security, to respond to an increased need to feed the growing population. In this context, rhizobacteria emerg

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Escobar, prieto Juan david. "Environmental origin and compartmentalization of bacterial communities associated with Avicennia marina mangroves on the Red Sea coast." Thesis, 2021. http://hdl.handle.net/10754/670221.

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Mangrove forests are highly productive ecosystems widespread in tropical and subtropical coastlines, with a coverage of 75% of the world’s tropical shorelines. Mangrove plants developed specific physiological and morphological adaptation to thrive in such unique environments. Together with plant adaptations, mangroves develop a tight partnership with microorganisms, mainly bacteria and fungi, that form the so-called mangrove-microbiome. Plant-associated microorganisms are generally recruited by the root system (root tissues and rhizosphere) and the colonization process starts with t

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Karpurapu, Manjula. "Characterization of chitinolytic ability of bacillus subtilis AF 1 and its use in development of improved formulation for plant growth promotion and disease control." Thesis, 1999. http://hdl.handle.net/2009/1050.

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