Дисертації з теми "Parasitic plants Host plants"
Оформте джерело за APA, MLA, Chicago, Harvard та іншими стилями
Ознайомтеся з топ-50 дисертацій для дослідження на тему "Parasitic plants Host plants".
Біля кожної праці в переліку літератури доступна кнопка «Додати до бібліографії». Скористайтеся нею – і ми автоматично оформимо бібліографічне посилання на обрану працю в потрібному вам стилі цитування: APA, MLA, «Гарвард», «Чикаго», «Ванкувер» тощо.
Також ви можете завантажити повний текст наукової публікації у форматі «.pdf» та прочитати онлайн анотацію до роботи, якщо відповідні параметри наявні в метаданих.
Переглядайте дисертації для різних дисциплін та оформлюйте правильно вашу бібліографію.
Soriano, Imelda Rizalina. "Novel inducible phytochemical defences against plant parasitic nematodes /." Title page, table of contents and summary only, 2004. http://web4.library.adelaide.edu.au/theses/09PH/09phs7141.pdf.
Повний текст джерелаFlagg, Jeannine K. "Cross-Species Translocation of mRNA from Host Plants into the Parasitic Plant Dodder." Thesis, Virginia Tech, 2006. http://hdl.handle.net/10919/31909.
Повний текст джерелаMaster of Science
Mahdy, Magdy. "Biological control of plant parasitic nematodes with antagonistic bacteria on different host plants." Bonn : Rheinische Friedrick-Wilhelms-Universität, Institut für Pflanzenkrankheiten, 2002. http://hss.ulb.uni-bonn.de/ulb_bonn/diss_online/landw_fak/2002/mahdy_magdy/0203.pdf.
Повний текст джерелаKelly, Colleen Kay. "Host use and foraging in the parasitic plant Cuscuta subinclusa." Diss., The University of Arizona, 1988. http://hdl.handle.net/10150/184543.
Повний текст джерелаHoungbédji, Tossimidé. "Rhamphicarpa fistulosa : infestation dans les bas-fonds rizicoles de la Région des Savanes (Togo) et étude des interactions hôte-parasite." Thesis, Université Paris-Saclay (ComUE), 2016. http://www.theses.fr/2016SACLS455/document.
Повний текст джерелаMain biotic constraints to rain-fed lowland rice cultivation in northern Togo include the parasitic weed Rhamphicarpa fistulosa (Hochst.) Benth. In order to evaluate efficient strategies to control R. fistulosa, our study was performed taking into account the following main objectives: 1) Identification of the distribution of R. fistulosa and study of the factors favouring its infestation, 2) Study of the impacts of infestation levels on rice weed communities, and 3) Characterization of the host-parasite interactions and their impacts on the host development and the parasite reproduction. Following fields investigations, highest infestations were observed on sandy soils with low levels of organic matter.In addition, weed flora found in the presence of R. fistulosa was much diversified and some weeds were found to been parasitized and could possibly constitute reservoirs to increase the seed stock of the parasite. In controlled experiments, R. fistulosa grown and reproduced better on rice and tomato crops, than on soybean which delayed the reproduction of the parasite. Germination of R. fistulosa seeds was stimulated in presence of cultivated crops or weeds. New collected seeds shown six months dormancy but their germination was stimulated in presence of phytohormones. In conclusion, the best strategies to control R. fistulosa must include delayed sowing, crop rotation with leguminous species (i.e. soybean, peanut or cowpea) and vegetable cropsKeywords: Rhamphicarpa fistulosa, rice, lowland, parasitism, host-parasite interaction, weeds
Suetsugu, Kenji. "Diverse interactions of heterotrophic plants with their hosts, pollinators and seed dispersers." Kyoto University, 2014. http://hdl.handle.net/2433/192205.
Повний текст джерела0048
新制・課程博士
博士(人間・環境学)
甲第18605号
人博第701号
新制||人||167(附属図書館)
26||人博||701(吉田南総合図書館)
31505
京都大学大学院人間・環境学研究科相関環境学専攻
(主査)教授 加藤 眞, 教授 市岡 孝朗, 教授 瀬戸口 浩彰, 教授 宮本 嘉久, 教授 新宮 一成
学位規則第4条第1項該当
Cameron, Duncan Drummond. "A role for differential host resistance to the hemiparasitic angiosperm, Rhinanthus minor L. in determining the structure of host plant communities?" Thesis, University of Aberdeen, 2004. http://digitool.abdn.ac.uk:80/webclient/DeliveryManager?pid=238495.
Повний текст джерелаJunior, Mauro Ferreira Bonfim. "Avaliação da capacidade reprodutiva de populações de Pratylenchus spp. frente a diferentes espécies vegetais." Universidade de São Paulo, 2010. http://www.teses.usp.br/teses/disponiveis/11/11135/tde-25022010-081502/.
Повний текст джерелаNematode populations that have been classified as P. coffeae show wide morphological, molecular and host range variability. Therefore, is essential the correct identification of the species and the knowledge about its parasitism capacity on some hosts, to ensure appropriate control measures and to estimate the entry risks of a pathogen in an area with susceptible host. In this sense, the present research report, firstly, propose a control measure of P. jaehni (K5), which is very aggressive to the arabic coffee, based on the use of poor host plants. In the second part, was carried out a host status evaluation of different plant species to four populations of Pratylenchus spp. In this context, were evaluated the reaction of different common bean cultivars to P. jaehni (K5), for its possible use in management of coffee areas infested with this nematode, and characterized the response of different economic important plant species (coffee, citrus rootstocks, banana and sorghum) to four populations of Pratylenchus spp (IB01P, IB02P, K5 e C1). The initial population used in experiments ranged between 180 and 200 nematodes. In all experiments, nematodes were extracted from roots by Coolen e D\'Herde´s method (1972) and eventually from the substrate by Jenkins´ method (1964). Three assays were conducted and results was as following: i) in the first one, with common bean, all tested cultivars were resistant to P. jaehni (K5), including the replica; ii) in the second one, with rootstocks, only rangpur lime was a good host of P. jaehni (K5); iii) in the third one, in which was used coffee, rangpur lime, banana and grain sorghum, was observed a differential host reaction for each nematode population evaluated. According to the present results, we suggest that common bean cultivars tested have great potential for use, or in intercropping or in crop rotation, in coffee areas infested by P. jaehni (K5) and populations of Pratylenchus spp. have different reproductive fitness in the plants species tested.
Reverter, Miriam. "Host-parasite interactions of coral reef fish." Thesis, Paris, EPHE, 2016. http://www.theses.fr/2016EPHE3060/document.
Повний текст джерелаFish parasites are an important part of ecosystems, however, in certain cases such as in aquaculture they can cause severe disease outbreaks. In this thesis I have studied host-parasite interactions in coral reef fishes, both in the natural and culture environments. I have studied the distribution of 13 dactylogyrid species from 34 butterflyfishes in the Indo West-Pacific. Composition of dactylogyrid communities was host specific and together with the biogeography results, where a turnover in the main Haliotrema species was observed, suggest that parasite specificity might result from host-parasite coevolution derived from past biogeographical episodes. Only one butterflyfish species, Chaetodon lunulatus, was never found parasitized by gill monogeneans. I have studied the butterflyfish mucus, which is the first barrier against pathogens, to investigate the C. lunulatus factors that might be related to the monogenean absence. Butterflyfish gill microbiome and metabolome revealed a high diversity. C. lunulatus presented a significantly higher abundance of Fusobacteria which was correlated to a higher expression of potentially derived β-hemoglobin peptides. Synthesis and evaluation of the peptide antiparasitic activities are being performed in the laboratory. I have also studied the use of medicinal plants as an alternative to chemotherapy in fish aquaculture. I investigated the antibacterial and immunostimulant activities of several local Polynesian plants and algae, and I found that Asparagopsis taxiformis displayed a potent antibacterial activity against Vibrio harveyi and Tenacibaculum maritmum and increased expression of two immune-related genes in Platax orbicularis
Mandyam, Keerthi. "Dark septate fungal endophytes from a tallgrass prairie and their continuum of interactions with host plants." Diss., Manhattan, Kan. : Kansas State University, 2008. http://hdl.handle.net/2097/1127.
Повний текст джерелаGrossi, De Sa Maira. "Root-knot nematode effectors : key actors of parasitism : functional analysis and protein-protein interaction with host plants." Thesis, Montpellier, 2016. http://www.theses.fr/2016MONTT133.
Повний текст джерелаRoot-knot nematodes (RKN), Meloidogyne spp. are small parasitic worms that infect plant roots where they induce the formation of highly specialized nutrient feeding sites. RKN are endoparasites with a wide host range encompassing major plant crops, impairing effective specific control. Meloidogyne javanica, M. graminicola, and M. incognita are the principal RKN species responsible for rice (Oryza sativa) production losses. Successful plant infection is likely achieved by nematode effector proteins produced in their esophageal gland cells and released into the host plant cells through their stylet. In particular, one of the striking features of RKN is their ability to deregulate vascular parenchyma cells to induce the formation of multinucleated giant cells with a high metabolic activity in the roots. The molecular processes underlying plant-RKN interactions still remain poorly understood. Identification of nematode virulence effectors and their plant targets may provide new insights for developing control strategies towards RKN. Thus, the aims of this study were to (1) assess the role of Meloidogyne secreted proteins (MSP) in rice – RKN interactions and (2) identify MSP targets among the major Arabidopsis thaliana Hub proteins involved in plant immunity, to assess the putative MSP function into host cells. For the first part of our study, we selected three Meloidogyne-genus specific proteins expressed in esophageal glands and predicted to be secreted. Gene expression analysis by RT-qPCR showed that MSP2 is highly expressed in the early stages of the nematode cycle, while MSP18 and MSP19 are up-regulated during parasitism in rice roots. Subcellular localization assays in onion cells identified the nucleus (for MSP2) and cytoplasm (for MSP7 and MSP18) as the main cellular compartments targeted by nematode proteins. Transgenic rice (O. sativa Nipponbare) plants expressing the MSP cDNAs or artificial micro-RNAs (amiRNAs) able to silence MSP genes were used to assess the role of MSPs during rice-RKN interactions. Homozygous transgenic lines were inoculated with pre-parasitic juveniles (J2) and (i) the number and developmental stage of nematodes present in roots after 21 days, (ii) the number of egg masses laid after 28 days and, (iii) the number of next-generation hatched J2 after 45 days were assessed. Rice lines overexpressing MSP18 allowed a higher reproduction rate of M. javanica and M. graminicola. On the contrary, impaired M. javanica development and reproduction was observed in rice lines expressing amiRNAs against MSP2 or MSP19 genes. These data showed that MSP2, MSP18, and MSP19 genes might be important genes for nematode parasitism or development. Transient expression assays in tobacco (Nicotiana benthamiana) revealed that MSP18 interfered with the INF1-triggered programmed cell death, suggesting that MSP18 could suppress the plant defense pathways to facilitate nematode parasitism. In the second part of this work, systematic yeast-two-hybrid paired assays were conducted to check for protein-protein interactions between 6 MSP and 18 A. thaliana Hub proteins. In yeast, the nematode MSP400 protein interacts with three Hub proteins, the Anaphase-Promoting-Complex 8 (At-APC8) and the transcription factors At-TCP14 and At-TCP15. Physical interaction of MSP400 with At-APC8, a key plant cell cycle regulator, was confirmed in planta by bimolecular fluorescence complementation (BiFC) assays. These results demonstrated for the first time that a plant parasitic nematode effector is able to directly interact with a cell cycle regulatory protein, revealing a novel mechanism utilized by RKN to control the host cell cycle machinery and thereby induce feeding site formation. The data obtained in this study significantly broaden our knowledge of the molecular players contributing to nematode pathogenicity, highlighting the different mechanisms exploited by RKN to promote plant susceptibility
Ah-Fong, Marie Véronique Audrey. "Molecular studies on the host parasite relationship of plants infected with the root-knot nematode Meloidogyne javanica." Thesis, Ah-Fong, Marie Véronique Audrey (2000) Molecular studies on the host parasite relationship of plants infected with the root-knot nematode Meloidogyne javanica. PhD thesis, Murdoch University, 2000. https://researchrepository.murdoch.edu.au/id/eprint/51991/.
Повний текст джерелаDavies, William James. "Implications for coevolutionary dynamics of a tri-trophic interaction between the orange-tip butterfly, its host plants and primary parasitoid in a heterogeneous landscape." Thesis, University of Liverpool, 2016. http://livrepository.liverpool.ac.uk/3001785/.
Повний текст джерелаPoyet, Mathilde. "L'opportunité de niche favorise l'invasion de Drosophila suzukii en France." Thesis, Lyon 1, 2014. http://www.theses.fr/2014LYO10169/document.
Повний текст джерелаSuccessful biological invasion is divided into three stages: the introduction of a non-native population on a new geographical area, the establishment of viable populations and their exponential growth in the area of introduction. In 2002, Shea and Chesson proposed the Opportunity Niche Hypothesis in order to explain the success of the establishment and the spread of invasive species. According to these authors, alien species introduced into a new range can jointly benefit from a decrease of the pressure applied by natural enemies and from an increase in the availability of resources. Drosophila suzukii has been reported to be an invasive species. Native of Asia, it has been now widely observed in North America and throughout Western Europe. Since its introduction in 2008, especially in Europe, the invasion of D. suzukii is particularly rapid and, as it grows on ripe fruits, a lot of concerns have been raised on the damage it causes on crops. In our work, we have highlighted some characters of this species as elements that facilitate the success of its invasion. D. suzukii is highly resistant against parasitoids, known as its major natural enemies. We have then showed the existence of a link between the ability to resist to larval parasitoids and a high hemocyte load. Furthermore, thanks to a very large sample, we have illustrated the great polyphagia of this species. This property provides available resources throughout the year. Finally, with a study of tritrophic interactions, we have shown that the nutritional quality of host plants used by D. suzukii can have an impact on the level of resistance to entomophages. Indeed, D. suzukii increases its resistance to several species of parasitoids when it growths on an alkaloid-rich substrate. Our recent results suggest that it would even be able to achieve a form of self-medication. The different studies performed in this thesis seem to confirm that D. suzukii makes the most of niche opportunity to efficiently invade temperate Europe
Alves, Artur Jorge da Costa Peixoto. "Botryosphaeria species on Quercus spp. and other woody hosts: taxonomy and phylogeny." Doctoral thesis, Universidade de Aveiro, 2006. http://hdl.handle.net/10773/4731.
Повний текст джерелаO género Botryosphaeria é bem conhecido devido ás espécies que causam doenças numa grande diversidade de plantas. A taxonomia deste género e seus géneros anamórficos, assim como das espécies tem sido algo confusa. Neste trabalho foram caracterizadas espécies de Botryosphaeria associadas a Quercus spp. e outros hospedeiros lenhosos, com base em características morfológicas e sequências nucleotídicas de um ou vários genes. A utilização desta abordagem permitiu a clarificação da taxonomia de algumas espécies já descritas, bem como a identificação e descrição de novos taxa. O género Dothiorella foi reintroduzido para acomodar os anamorfos de Botryosphaeria que possuem conídios castanhos e 1-septados. Esta decisão baseou-se no estudo das características morfológicas da espécie tipo do género bem como em análises filogenéticas. A análise filogenética de sequências nucleotídicas de vários genes confirmou que os géneros Diplodia e Lasiodiplodia representam taxa distintos. Demonstrou-se que as estrias longitudinais em conídios não têm valor taxonómico para distinguir entre os dois géneros. O género Lasiodiplodia distingue-se do género Diplodia pela presença de paráfises. Os métodos baseados em PCR, ARDRA, MSP-PCR e rep-PCR foram utilizados para discriminar entre espécies do género Botryosphaeria e espécies anamórficas relacionadas. O método ARDRA permitiu a diferenciação de 10 espécies, enquanto os métodos MSP-PCR e rep-PCR permitiram a identificação de 24 espécies. Estes métodos representam procedimentos simples e rápidos que podem ser utilizados para a identificação rotineira de isolados de Botryosphaeria ao nível da espécie. Os métodos MSP-PCR e rep- PCR também se revelaram úteis para estudar a variabilidade intraespecífica. Foi realizada uma análise sistemática molecular da família Botryosphaeriaceae recorrendo a sequências nucleotídicas de diversos genes. Esta análise mostrou que o género Botryosphaeria sensu lato é parafilético, sendo composto por várias linhagens filogenéticas. Estas linhagens representam géneros distintos que são caracterizados essencialmente com base na morfologia das formas anamórficas. O género Melanops foi reintroduzido para acomodar uma espécie anteriormente classificada no género Botryosphaeria. Não foi possível definir qual a posição da família Botryosphaeriaceae na classificação dos Ascomicetos. De acordo com os dados disponíveis prevê-se que esta família deverá ser incluída numa nova ordem distinta das ordens Pleosporales e Dothideales.
The genus Botryosphaeria is well known by the species that cause disease in a wide range of plant hosts. The taxonomy of Botryosphaeria and associated anamorph genera as well as of the species has been confused in the past. In this work, Botryosphaeria species occurring on Quercus spp. and other woody hosts were characterised on the basis of morphology and nucleotide sequence data from single or multiple genes. Using this approach it was possible to clarify taxonomic uncertainties related to some known species and also to identify and describe new species. Through a study of the type species of Dothiorella this genus was reinstated to accommodate anamorphs of Botryosphaeria with brown, one-septate conidia. This was further supported by phylogenetic analyses. Phylogenetic analyses of combined multi-gene sequence data supported the genera Diplodia and Lasiodiplodia as distinct. It was shown that conidial striations are not a taxonomically meaningful character to separate both genera, and that Lasiodiplodia is distinguished from Diplodia by the presence of paraphyses. The PCR-based methods ARDRA, MSP-PCR and rep-PCR were used to discriminate between species of the genus Botryosphaeria as well as associated anamorphic species. The ARDRA procedure allowed for the differentiation of 10 species while MSP-PCR and rep-PCR allowed a clear identification of 24 species. These methods provide simple and rapid procedures that can be used for routine identification of Botryosphaeria isolates at the species level. MSP-PCR and rep-PCR also proved useful to study intraspecific variability. A molecular systematic analysis of the family Botryosphaeriaceae was performed using multi-gene sequence data. The genus Botryosphaeria sensu lato was shown to be paraphyletic, and composed of different phylogenetic lineages. These represent distinct genera which are characterised essentially on the basis of morphological features of the anamorphs. The genus Melanops was reinstated to accommodate a species previously included in Botryosphaeria. The position of the Botryosphaeriaceae within the higher classification of Ascomycetes could not be indubitably established. Given the current data it is envisaged that this family should be included in a new order distinct from the Pleosporales and Dothideales.
FCT - SFRH/BD/10389/2002
FSE
POCTI/AGR/44348/2002
POCTI/AGR/56140/2004
Nothnagl, Margit. "Interaction between greenhouse grown chrysanthemum and Frankliniella occidentalis : a modelling approach /." Alnarp : Department of Crop Science, Swedish University of Agricultural Sciences, 2006. http://epsilon.slu.se/200697.pdf.
Повний текст джерелаSchofield, Adrian Darcy. "Cellular interactions between host and parasite." Thesis, University of Edinburgh, 1987. http://hdl.handle.net/1842/14358.
Повний текст джерелаPescott, Oliver. "The genetics of host adaptation in the parasitic plant Striga hermonthica." Thesis, University of Sheffield, 2013. http://etheses.whiterose.ac.uk/3979/.
Повний текст джерелаGriffith, Katie A. "The ecology of a parasitic plant and its host plant in a central California salt marsh /." Diss., Digital Dissertations Database. Restricted to UC campuses, 2008. http://uclibs.org/PID/11984.
Повний текст джерелаRevill, Meredith Jane Wilson. "The evolutionary loss of photosynthesis in parasitic plants." Thesis, University of Cambridge, 2004. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.615769.
Повний текст джерелаRouxel, Mélanie. "Ecologie et évolution de l’interaction Plasmopara viticola / Vitis spp. et évaluation des risques de contournement de la résistance de la vigne au mildiou." Thesis, Bordeaux 2, 2012. http://www.theses.fr/2012BOR22023/document.
Повний текст джерелаUnderstanding the process of adaptation of parasite populations to their host-plant is a key issue in evolutionary ecology. It is also a major subject in applied research that has implications for crop protection. The oomycete Plasmopara viticola, the causal agent of downy mildew, attacks the species of the Vitis genus. In a context where the main concern of the breeding programs is the durability of resistance, new knowledge about the ecology and evolution of the interaction between parasite and host is needed in order to evaluate the potential of downy mildew to overcome the resistance. In my thesis, I addressed the role of the host-plant as an evolutionary factor for downy mildew populations, by asking this question at two different evolutionary scales: (i) in the pathogen region of origin (North America) I assessed the degree of specialization of the parasite on its wild and cultivated host range (ii) in Europe, where downy mildew has been introduced recently, I studied the evolution of downy mildew populations subject to the selection pressure imposed by resistant grapevine varieties. To understand the host-plant specialization in this pathosystem, where several cryptic species have been identified, we performed cross inoculations between different host (Vitis spp.) and pathogen (P. viticola) species. Morphological and phenotypic data provide evidence of host-plant specialization in P. viticola populations: downy mildew species A and D are specialized on their host-plant, while the specialization process is ongoing for species B and C. Although no genetic differentiation has been shown inside species C, there are two distinct groups within species B. Isolates from the cultivated compartment are on average more aggressive than isolates from wild vines, indicating an adaptation of isolates growing on cultivated host-plants. Finally, a large-scale study of the distribution of downy mildew species on both their wild and cultivated host-plants resulted in the identification of a new cryptic species and confirmed the host-plant specialization. In Europe, our results show that the limited deployment of resistant varieties has led to changes in downy mildew populations: emergence of virulent isolates (i.e. breakdown of a major QTL for resistance), and increased aggressiveness on Vitis vinifera. In order to understand the mechanisms at the origin of specialization and resistance breakdown, we examined the parasite’s effector repertoire. Over one hundred effector candidates were identified using available data on the P. viticola genome. The polymorphism of 32 candidate genes revealed that three of them evolve under positive selection. Our results reveal the strong ability of downy mildew to adapt to its host plant and to plant resistance. They should be taken into account when devising strategies for the deployment of grapevine resistances in order to guarantee their durability
Walsh, Ellie Kathleen. "Investigating Root-Knot and Soybean Cyst Nematode Parasitic Interactions through Transcriptomic Analyses of the Host and Parasite." The Ohio State University, 2016. http://rave.ohiolink.edu/etdc/view?acc_num=osu1471856126.
Повний текст джерелаKarns, Georgia. "Genetic differentiation of the parasitoid, Cotesia congregata (Say), based on host-plant complex." VCU Scholars Compass, 2009. http://scholarscompass.vcu.edu/etd/17.
Повний текст джерелаKim, Gunjune. "Massive Exchange of mRNA between a Parasitic Plant and its Hosts." Diss., Virginia Tech, 2014. http://hdl.handle.net/10919/50509.
Повний текст джерелаPh. D.
Muthaukrishnan, L. "Effect of site of infection on host plant growth and metabolism." Thesis, University of Oxford, 1987. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.379917.
Повний текст джерелаTham, Foong-Yee. "Molecular markers of host range in Peronospora parasitica (Pers. ex. Fr.) Fr." Thesis, University of Nottingham, 1995. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.261023.
Повний текст джерелаLeBlanc, Megan Leanne. "Characterizing RNA translocation in the parasitic weed Cuscuta pentagona." Diss., Virginia Tech, 2013. http://hdl.handle.net/10919/52865.
Повний текст джерелаPh. D.
Al-Nahidh, S. I. "Host-endophyte compatibility in mycorrhizal crop plants." Thesis, University of Leeds, 1985. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.354035.
Повний текст джерелаSutherland, Margery Louise. "Recognition of host plants by vascular pathogens." Thesis, University of Reading, 1991. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.303155.
Повний текст джерелаKunjo, Ebrima Madi. "Integration of socio-economically appropriate management strategies for Striga hermonthica in the Gambia." Thesis, University of Reading, 2002. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.250674.
Повний текст джерелаAyers, Megan. "Behavioral Responses of Male Parasitic Wasps to Plant Cues: A Comparison of Two Host-Plant Complex Sources of Cotesia congregata (Say)." VCU Scholars Compass, 2015. http://scholarscompass.vcu.edu/etd/3766.
Повний текст джерелаFors, Lisa. "Ecology and evolution in a host-parasitoid system : Host search, immune responses and parasitoid virulence." Doctoral thesis, Stockholms universitet, Institutionen för ekologi, miljö och botanik, 2015. http://urn.kb.se/resolve?urn=urn:nbn:se:su:diva-115243.
Повний текст джерелаAt the time of the doctoral defense, the following papers were unpublished and had a status as follows: Paper 2: Manuscript. Paper 4: Manuscript.
Hennecke, Berthold Rembertus. "Host-pathogen interactions between the fungal pathogen Phloeospora mimosae-pigrae and Mimosa pigra, giant sensitive plant /." [St. Lucia, Qld.], 2002. http://www.library.uq.edu.au/pdfserve.php?image=thesisabs/absthe17081.pdf.
Повний текст джерелаSeaberg, Bonnie Lee. "Host factors involved in viral movement through plants." Thesis, [College Station, Tex. : Texas A&M University, 2008. http://hdl.handle.net/1969.1/ETD-TAMU-3282.
Повний текст джерелаHatcher, P. E. "Host plants and nutrition in conifer-feeding Lepidoptera." Thesis, Oxford Brookes University, 1989. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.234738.
Повний текст джерелаHernández, Castellano Carlos. "Drivers of variability in plant-pollinator and host-parasitoid communities: effects on interaction network structure and ecosystem function." Doctoral thesis, Universitat Autònoma de Barcelona, 2020. http://hdl.handle.net/10803/670558.
Повний текст джерелаLes comunitats ecològiques són entitats dinàmiques l’estructura i composició de les quals està conformada per processos ecològics i per variabilitat ambiental. Degut a que les espècies interaccionen entre elles, els canvis en l’estructura i la composició de les comunitats poden alterar les xarxes d’interacció i el funcionament dels ecosistemes. En aquesta tesi estudio com un procés ecològic (la colonització d’un hàbitat per una nova espècie) i un component important de la variabilitat espacial (la grandària de l’hàbitat) afecta a les comunitats de pol·linitzadors, d’abelles i vespes, així com a les seves interaccions mutualistes i antagonistes. També investigo si aquests canvis afecten l’estructura de la xarxa d’interaccions i les conseqüències potencials sobre la funció ecosistèmica (pol·linització, reproducció de les plantes, i parasitisme).Els canvis en la composició de les comunitats de plantes són cada vegada més freqüents en el context actual de les invasions biològiques. Tot i així, les invasions de plantes normalment representen escenaris extrems de dominància ecològica i els seus efectes han sigut estudiats relativament bé. Contràriament, els efectes de la colonització dels hàbitats per espècies autòctones (per exemple, com a resultat dels canvis en la distribució geogràfica mediats pel canvi climàtic) han rebut molta menys atenció.Al Capítol 1 analitzem els efectes de l’arribada d’una nova espècie de planta autòctona a un matollar, incloent els canvis en la composició de la comunitat de pol·linitzadors, els patrons d’interacció i l’estructura de la xarxa planta-pol·linitzador, y les conseqüències per a la pol·linització i per a l’èxit reproductiu de les espècies de plantes residents. Per a això vam manipular experimentalment taques de matollar introduint una planta autòctona (planta colonitzadora d’ara endavant), ajustant el número de flors introduïdes a la quantitat de recursos florals localment disponibles. La planta colonitzadora va atraure borinots, facilitant les interaccions a les plantes residents. Les comunitats colonitzades van exhibir una generalització de la xarxa més gran, un aniuament més gran, i modificacions en la composició dels mòduls de la xarxa. Tots aquests canvis van resultar en una deposició de pol·len heteroespecífic (però no conespecífic) més gran, i va tenir efectes contrastats en l’èxit reproductiu de les plantes residents (neutral, positiu, o negatiu depenent de l’espècie). El nostre estudi mostra que les interaccions planta-pol·linitzador es reorganitzen ràpidament com a resposta a noves situacions (inclús quan la nova planta no és excessivament dominant), amb conseqüències funcionals importants en la pol·linització i en la reproducció de les plantes. La relació espècies-àrea (increment en la riquesa d’espècies amb l’àrea) és una de les lleis de l’Ecologia més antigues i fonamentals i, recentment, ha sigut estesa a la riquesa d’interaccions (relació enllaços-àrea) i a l’estructura de la xarxa (relació xarxa-àrea). Tot i així, tot i que les relacions espècies-àrea i enllaços-àrea han rebut un ampli suport d’estudis empírics, la relació entre l’estructura de la xarxa i l’àrea roman en gran part inexplorada. Entendre aquesta relació és important perquè la fragmentació antropogènica dels hàbitats està tenint impactes profunds en la configuració dels hàbitats i està reduint la grandària dels mateixos.Al Capítol 2 testem vàries hipòtesis relacionades amb les relacions espècies-àrea, enllaços-àrea, i xarxa-àrea utilitzant comunitats d’abelles i vespes nidificants en cavitats preestablertes així com la fauna associada als seus nius (hostes i parasitoides d’ara endavant, respectivament) com a sistema d’estudi. Per a obtenir nius d’abelles i vespes vam instal·lar estacions de niadors en taques d’hàbitat obert (favorable) –envoltats de bosc dens (hàbitat desfavorable)- de tres categories de grandària (petites, ~0.1 ha; mitjanes, ~5ha; i grans, hàbitat obert continu). Els nius obtinguts en cada taca van ser disseccionats i els seus contingut van ser analitzats anotant la identitat i l’abundància de cada espècie d’hoste i parasitoid. La riquesa d’hostes, parasitoides, i interaccions va incrementar de les taques petites a les mitjanes, però no de les taques mitjanes a les grans. Els enllaços per espècie van incrementar amb la grandària de la taca, però la taxa de parasitisme no va seguir cap tendència relacionada amb la grandària de la taca. L’especialització de la xarxa va disminuir de les taques petites a les mitjanes, però les taques grans van mostrar una especialització similar a la de les taques petites i mitjanes. La modularitat va disminuir de les taques petites a les mitjanes, però no va haver-hi diferències entre les taques mitjanes i les grans. El número de mòduls va incrementar amb la grandària de la taca. Els nostres resultats estan, majoritàriament, parcialment d’acord amb les relacions espècies-àrea i enllaços-àrea. L’absència de diferències entre les taques mitjanes i grans indica l’existència d’un llindar per damunt del qual la riquesa d’espècies i d’interaccions ja no està limitada per la grandària de l’hàbitat, amb implicacions importants per a la conservació. D’altra banda, els nostres resultats estan majoritàriament en desacord amb les prediccions de la relació xarxa-àrea. Suggerim que l’empobriment de les comunitats a les taques petites resulta en una limitació en l’elecció dels hostes per part dels parasitoides generalistes, donant lloc a nivells alts d’especialització ecològica i de modularitat.S’espera que els canvis en la composició de plantes afectin a les comunitats planta-pol·linitzador de múltiples maneres depenent del context floral, de l’abundància relativa de la planta colonitzadora, del seu grau de generalització, i del seu síndrome floral. La facilitació o la competència pels pol·linitzadors poden resultar en canvis predictibles en l’estructura de la xarxa i en la pol·linització, però s’espera que els efectes sobre la reproducció de les plantes siguin altament contingents a cada espècie. S’espera que la grandària de l’hàbitat afecti a les espècies i a les interaccions seguint les relacions espècies-àrea i enllaços-área. Unint les evidències empíriques amb les prediccions teòriques, desenvolupem un marc de referència per a la relació xarxa-àrea. Les respostes de les xarxes mutualistes i antagonistes als canvis són predictibles. Tot i així, les conseqüències sobre la funció ecosistèmica segueixen sent altament contingents.
Las comunidades ecológicas son entidades dinámicas cuya estructura y composición está conformada por procesos ecológicos y por variabilidad ambiental. Debido a que las especies interaccionan entre ellas, los cambios en la estructura y composición de las comunidades pueden alterar las redes de interacción y el funcionamiento de los ecosistemas. En esta tesis estudio cómo un proceso ecológico (la colonización de un hábitat por una nueva especie) y un componente importante de la variabilidad espacial (el tamaño del hábitat) afecta a las comunidades de polinizadores, de abejas y avispas, así como a sus interacciones mutualistas y antagonistas. También investigo si estos cambios afectan a la estructura de la red de interacciones y las consecuencias potenciales sobre la función ecosistémica (polinización, reproducción de las plantas, y parasitismo).Los cambios en la composición de las comunidades de plantas son cada vez más frecuentes en el contexto actual de las invasiones biológicas. Sin embargo, las invasiones de plantas normalmente representan escenarios extremos de dominancia ecológica y sus efectos han sido estudiados relativamente bien. Por el contrario, los efectos de la colonización de los hábitats por especies autóctonas (por ejemplo, como resultado de los cambios en la distribución geográfica mediados por el cambio climático) han recibido mucha menos atención.En el Capítulo 1 analizamos los efectos de la llegada de una nueva especie de planta autóctona en un matorral, incluyendo los cambios en la composición de la comunidad de polinizadores, los patrones de interacción y la estructura de la red planta-polinizador, y las consecuencias para la polinización y para el éxito reproductivo de las especies de plantas residentes. Para ello manipulamos experimentalmente parches de matorral introduciendo una planta autóctona (planta colonizadora de ahora en adelante), ajustando el número de flores introducidas a la cantidad de recursos florales localmente disponibles. La planta colonizadora atrajo a abejorros, facilitando las interacciones a las plantas residentes. Las comunidades colonizadas exhibieron una mayor generalización de la red, un mayor anidamiento, y modificaciones en la composición de los módulos de la red. Todos estos cambios resultaron en una mayor deposición de polen heteroespecífico (pero no conespecífico) y tuvo efectos contrastados en el éxito reproductivo de las plantas residentes (neutral, positivo, o negativo dependiendo de la especie). Nuestro estudio muestra que las interacciones planta-polinizador se reorganizan rápidamente en respuesta a nuevas situaciones (incluso cuando la nueva planta no es excesivamente dominante), con consecuencias funcionales importantes en la polinización y en la reproducción de las plantas.La relación especies-área (incremento de la riqueza de especies con el área) es una de las leyes de la Ecología más antiguas y fundamentales y, recientemente, ha sido extendida a la riqueza de interacciones (relación enlaces-área) y a la estructura de la red (relación red-área). Sin embargo, a pesar que las relaciones especies- y enlaces- área han recibido un soporte amplio de estudios empíricos, la relación entre la estructura de la red y el área permanece en gran parte inexplorada. Entender esta relación es importante porque la fragmentación antropogénica de los hábitats está teniendo impactos profundos en la configuración de los hábitats y está reduciendo el tamaño de los mismos.En el Capítulo 2 testamos varias hipótesis relacionadas con las relaciones especies-área, enlaces-área y red-área utilizando comunidades de abejas y avispas nidificantes en cavidades preestablecidas así como la fauna asociada a sus nidos (huéspedes y parasitoides de ahora en adelante, respectivamente) como sistema de estudio. Para obtener nidos de abejas y avispas instalamos estaciones de nidales en parches de hábitat abierto (favorable) –rodeados por bosque denso (hábitat desfavorable)- de tres categorías de tamaño (pequeños, ~0.1 ha; medianos, ~5 ha; y grandes, hábitat abierto continuo). Los nidos obtenidos en cada parche fueron diseccionados y sus contenidos fueron analizados anotando la identidad y la abundancia de cada especie de huésped y parasitoide. La riqueza de huéspedes, parasitoides, e interacciones incrementó de los parches pequeños a los medianos, pero no de los parches medianos a los grandes. Los enlaces por especie incrementaron con el tamaño del parche, pero la tasa de parasitismo no siguió ninguna tendencia relacionada con el tamaño del hábitat. La especialización de la red disminuyó de los parches pequeños a los medianos, pero los parches grandes mostraron una especialización similar a la de los parches pequeños y medianos. La modularidad disminuyó de los parches pequeños a los medianos, pero no hubo diferencias entre los parches medianos y los grandes. El número de módulos incrementó con el tamaño del parche. Nuestros resultados están, en su mayor parte, parcialmente de acuerdo con las relaciones especies-área y enlaces-área. La ausencia de diferencias entre los parches medianos y grandes indica la existencia de un umbral por encima del cual la riqueza de especies y de interacciones ya no está limitada por el tamaño del hábitat, con implicaciones importantes para la conservación. Por otro lado, nuestros resultados están mayoritariamente en desacuerdo con las predicciones de la relación red-área. Sugerimos que el empobrecimiento de las comunidades en los parches pequeños resulta en una limitación en la elección de los huéspedes por parte de los parasitoides generalistas, dando lugar a altos niveles de especialización ecológica y de modularidad.Se espera que los cambios en la composición de plantas afecten a las comunidades planta-polinizador de múltiples maneras dependiendo del contexto floral, de la abundancia relativa de la planta colonizadora, de su grado de generalización, y de su síndrome floral. La facilitación o la competencia por los polinizadores pueden resultar en cambios predecibles en la estructura de la red y en la polinización, pero se espera que los efectos sobre la reproducción de las plantas sean altamente contingentes en cada especie. Se espera que el tamaño del hábitat afecte a las especies y a las interacciones siguiendo las relaciones especies-área y enlaces-área. Uniendo las evidencias empíricas con las predicciones teóricas, desarrollamos un marco de referencia para la relación red-área. Las respuestas de las redes mutualistas y antagonistas a los cambios son predecibles. Sin embargo, las consecuencias sobre la función ecosistémica siguen siendo altamente contingentes.
Ecological communities are dynamic entities whose structure and composition are shaped by ecological processes and environmental variability. Because species interact with one another, changes in community structure and composition are likely to alter interaction networks and ecosystem functioning. In this thesis I study how an ecological process (the colonization of a habitat by a new species) and an important component of spatial variability (habitat area) affect pollinator and bee-wasp communities and their mutualistic and antagonistic interactions. I also investigate whether these changes affect interaction network structure and the potential consequences on ecosystem function (pollination, plant reproduction, and parasitism). Changes in plant community composition are becoming increasingly frequent in the current context of pervasive biological invasions. However, plant invasions usually represent extreme scenarios of ecological dominance and their effects have been relatively well studied. By contrast, the effects of habitat colonization by native species (for example, as a result of changes in geographical distribution mediated by climate change) have received much less attention.In Chapter 1 we analyze the effects of the arrival of a new native plant into a scrubland community, including changes in pollinator community composition, plant–pollinator interaction patterns and network structure, and the consequences for pollination and reproductive success of resident plant species. To do so, we experimentally manipulated patches of scrubland by introducing a native plant (henceforth colonizing plant), adjusting the number of flowers introduced to the amount of floral resources locally available. The colonizing plant attracted bumblebees, facilitating interactions to resident plants. Colonized communities exhibited higher network generalization, nestedness, and modifications in the composition of network modules. All these changes resulted in higher heterospecific (but not conspecific) pollen deposition and had contrasting effects on the reproductive success of resident plants (neutral, positive, or negative depending on the species). Our study shows that plant-pollinator interactions are rapidly rearranged in response to novel situations (even when the new plant is not overly dominant), with important functional consequences on pollination and plant reproduction.The species-area relationship (increasing species richness with area) is one of the oldest and most fundamental laws in Ecology and, in recent years, has extended to interaction richness (link-area relationship) and network structure (network-area relationship). However, although the species- and link-area relationships have received ample support from empirical studies, the relationship between network structure and area remains largely unexplored. Understanding this relationship is important because anthropogenic habitat fragmentation is having a profound impact on habitat configuration and effectively reducing the size of natural habitats.In Chapter 2 we test several hypothesis related to the species-area, link-area and network-area relationships using cavity-nesting bee-wasp communities and their nest associates (henceforth hosts and parasitoids, respectively), as a study system. To obtain bee-wasp nests we set up nest-trapping stations in patches of (favorable) open habitat -surrounded by dense forest (unfavorable habitat)- of three size categories (small, ~0.1 ha; medium, ~5 ha; and large, continuous open habitat). The nests obtained in each patch were dissected and their contents analyzed by noting the identity and abundance of each host and parasitoid species. Host, parasitoid, and interaction richness increase from small to medium patches, but not from medium to large patches. Links per species increased with patch size, but parasitism rate did not follow any patch-size-mediated trend. Network specialization decreased from small to medium patches, but large patches showed similar specialization to that of small and medium patches. Modularity decreased from small to medium patches but there were no differences between medium and large patches. The number of modules increased with patch size. Our results are mostly in partial agreement with the species-area and the link-area relationships. The lack of differences between medium and large patches indicates the existence of a threshold above which local species/link richness are no longer limited by habitat size, with important implications for conservation. On the other hand, our results are mostly in disagreement with the predictions of the network-area relationship. We suggest that community impoverishment in small patches results in limited host choice by generalist parasitoids, leading to high levels of ecological specialization and modularity. Changes in plant composition are expected to affect plant-pollinator communities in multiple ways depending on the flower context, the relative abundance of the colonizing plant, its degree of generalization, and its pollination syndrome. Facilitation or competition for pollinators may result in predictable responses in network structure and pollination, but the effects on plant reproduction are expected to be highly contingent on each species. Habitat size is expected to affect species and interactions following the species-area and the link-area relationships. Merging empirical evidence with theoretical predictions, we developed a framework for the network-area relationship. Mutualistic and antagonistic network responses to changes are predictable. However, consequences on ecosystem function remain highly contingent.
Radomiljac, Andrew M. "Santalum album L. plantations: a complex interaction between parasite and host." Thesis, Radomiljac, Andrew M. (1998) Santalum album L. plantations: a complex interaction between parasite and host. PhD thesis, Murdoch University, 1998. https://researchrepository.murdoch.edu.au/id/eprint/270/.
Повний текст джерелаRadomiljac, Andrew M. "Santalum album L. plantations : a complex interaction between parasite and host." Murdoch University, 1998. http://wwwlib.murdoch.edu.au/adt/browse/view/adt-MU20060818.134603.
Повний текст джерелаQu, Yanyan. "Interactions indirectes médiées par la plante sous contraintes biotiques multiples." Electronic Thesis or Diss., Université Côte d'Azur (ComUE), 2019. http://theses.univ-cotedazur.fr/2019AZUR6035.
Повний текст джерелаIn the agroecosystem, plant crops are the primary trophic producer that can be consumed/parasitized by a plethora of organisms, including viruses, bacteria, fungi, nematodes and many herbivore insects. On one hand, plants support these organisms as food resources; on the other hand, plants defend themselves against those consumers by employing constitutive and induced defenses. Both features might be involved in plant-mediated indirect interactions when multiple pests share the same host plant. It means that the presence of one pest might have an indirect effect on another plant through the modification of some plant host features (nutritional quality or defense). During my Ph.D. study, I assessed the modulating factors (both abiotic and biotic factors) that might affect the plant-mediated indirect interactions, and also investigated the influences of such indirect interactions at long term and on a tri-trophic system, and finally analyzed the underlying phytochemical mechanisms by mechabolomics analyses. Firstly, sublethal effects of beta-cypermethrin, a pyrethroid pesticide as the abiotic factor, were assessed on the interspecific interactions between the specialist aphid Aphis glycines, and the generalist aphid Aulacorthum solani on soybeans. Sublethal concentration (LC5) of beta-cypermethrin accelerated the interspecific competition between the two species of aphids. Induced susceptibility of soybean plants to one species of aphids caused by the other species would be significantly impaired by the exposure to sublethal beta-cypermethrin.Secondly, various pest species abundance and feeding strategies, i.e. the piercing-sucking aphid, the chewing caterpillar, the plant fungus and the root-knot nematode, were introduced on tomato plants, Solanum lycopersicum to evaluate the plant-mediated indirect interactions among these pests. In the results, insect performances, i.e. the number of aphid individuals and development rate of caterpillar larva, were correlated to the abundance of indirect interactions whether pests attacked tomato plants sequentially or simultaneously. When pests attacked tomato plants at the same time, insect performances were positively correlated to the abundance of indirect interactions. Nevertheless, when pests infested tomato plants in sequence, the insect performances were negatively correlated to the abundance of indirect interactions. However, such a correlation was not detected with the pathogenic organisms (fungi and nematodes). Thirdly, the population dynamic of aphid M. euphorbiae was also monitored under a tri-trophic system. We found that the aphid population, involved in the above-belowground interactions, slowed down in both the short term and long term via reduced survival of nymph aphids and facilitating induction of winged aphids. Furthermore, parasitism efficiency of the natural enemy Aphidius ervi to aphids and tomato yields were also reduced by such above-belowground interactions. Lastly, following an untargeted metabolomic approach, we detected many significant chemical variations between non-infested and infested plants, disregarding the pest infestation. Most of them are probably induced by the presence of nematodes, the only belowground pest. On the opposite, we did not observe many chemical differences in roots metabolome when we compared the different types of infestation, meaning that the presence of nematodes probably lead the metabolomic signal in infested roots, disregarding the presence of other pests aboveground. All the studies may contribute to a comprehensive understanding of the diverse interactions among plants, pesticides, various pests, and natural enemies, and optimizing the integrated pest management in the agroecosystem
Schäpers, Alexander. "Evolutionary and mechanistic aspects of insect host plant preference." Doctoral thesis, Stockholms universitet, Zoologiska institutionen, 2016. http://urn.kb.se/resolve?urn=urn:nbn:se:su:diva-128488.
Повний текст джерелаAt the time of the doctoral defense, the following paper was unpublished and had a status as follows: Paper 4: Manuscript.
Gutu, Ketema Tolossa. "Bioassay-guided phytochemical study of indigenous medicinal plants of Ethiopia." Thesis, University of Edinburgh, 2018. http://hdl.handle.net/1842/28964.
Повний текст джерелаHenson, Katherine Sarah Elaine. "The restoration of ecological interactions : considering plant-pollinator, host-parasite and alien-alien interactions." Thesis, University of Bristol, 2007. http://hdl.handle.net/1983/a49626c2-783c-460b-addd-d124175070b1.
Повний текст джерелаClermont, Kristen Renee. "Plasticity of Primary Metabolism in Parasitic Orobanchaceae." Diss., Virginia Tech, 2018. http://hdl.handle.net/10919/86130.
Повний текст джерелаPh. D.
Parasitic weeds of the plant family Orobanchaceae attach to the roots of host plants via haustoria. Parasite haustoria embed into the host plant and are capable of drawing nutrients from host vascular tissue. Species in this family span the spectrum of the extent to which a parasitic plant may depend on its host for nutrients. This allows comparisons that provide insight into the ways in which parasites adapt. A key aspect of this is the relationship between the metabolite profile of the parasite and the metabolite profile of the host. To what extent does the metabolite profile of the parasite depend on that of the host? Do parasites that differ in host-dependency also differ in their metabolism or do they use common metabolic strategies? These questions were addressed using comparative profiling of primary metabolites to gain insight into carbon and nitrogen assimilation by the obligate parasite Phelipanche aegyptiaca (which cannot perform photosynthesis) and the facultative parasite Triphysaria versicolor (which can perform photosynthesis). First, metabolite profiles of these parasites and their hosts were compared during the key life stages before and after haustorial attachment. Second, the impact of specific variations in host metabolism was analyzed for P. aegyptiaca growing on Arabidopsis thaliana hosts. These hosts had mutations in enzymes related to amino acid metabolism but otherwise identical genetic backgrounds. Comparison of P. aegyptiaca and T. versicolor metabolite profiles identified substantial differences in the stages spanning the transition from pre-haustorial development through post-haustorial feeding. Each parasite species is distinct from the other and from their hosts. For parasites growing on host lines that differ in amino acid content, the size of P. aegyptiaca tubercles decreased when grown on the aap6 mutant line, which has decreased levels of asparagine in the phloem sap compared to the wild type. However, altered amino acid levels in other lines did not impact P. aegyptiaca growth, indicating that this parasite has ability to compensate for variation in host metabolic composition. Overall, this work provides insights both into the metabolism of parasitic plants and lays the foundation for the development of new metabolism-based control strategies.
Simpson, Katrina Lynn Scott. "Interactions between aphids and their host plants under drought stress." Thesis, University of Edinburgh, 2013. http://hdl.handle.net/1842/8294.
Повний текст джерелаMallaburn, Peter S. "The physiological anatomy of the haustorium of Striga hermonthica (Del.) Benth. (Scrophulariaceae)." Thesis, University College London (University of London), 1992. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.266858.
Повний текст джерелаOlsen, Mary W., and Deborah Young. "Dwarf Mistletoes." College of Agriculture and Life Sciences, University of Arizona (Tucson, AZ), 2011. http://hdl.handle.net/10150/146719.
Повний текст джерелаOriginally published: 2003
Dwarf mistletoes are parasitic flowering plants that grow within host plants for about two years before producing characteristic yellow to orange or green to brown leafless aerial shoots on the outside of infected host tissue. They occur only on conifers in the pine family in Arizona and are usually host specific. This article gives information about the disease cycle, the symptoms and prevention and control methods for dwarf mistletoes.
Bass, Katherine Ann. "Resource partitioning in the multi-species interaction between a host plant, a parasitic angiosperm and an insect herbivore." Thesis, University of Sussex, 2005. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.666763.
Повний текст джерелаAbourghiba, Taher Yonis. "Comparative analysis of the impacts of arbuscular mycorrhizal fungi on 'host' and 'non-host' plants." Thesis, University of Sheffield, 2005. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.422182.
Повний текст джерелаNobbs, J. M. "The distribution and abundance of nematodes (especially the plant parasites) in the arid region of South Australia /." Title page, contents and summary only, 1987. http://web4.library.adelaide.edu.au/theses/09PH/09phn744.pdf.
Повний текст джерелаHelson, Julie Elizabeth. "Tropical host plant-insect relationships as guides to medicinally-active plants." Thesis, McGill University, 2005. http://digitool.Library.McGill.CA:80/R/?func=dbin-jump-full&object_id=98723.
Повний текст джерела