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Dissertations / Theses on the topic 'Composition of root exudates'

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Published: 4 June 2021
Last updated: 11 February 2022

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1

Henry, Amelia. "Effect of Drought, Flooding, and Potassium Stress on the Quantity and Composition of Root Exudates in Axenic Culture." DigitalCommons@USU, 2003. https://digitalcommons.usu.edu/etd/5633.

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Root exudates include important chelating compounds and can change the rhizosphere pH by several units. These changes are essential for nutrient uptake and can also alter solubility of soil contaminants and increase plant uptake. Mild root-zone stress may increase exudation and more severe stress can damage membranes and increase root turnover, all of which increase root-zone carbon. Increased carbon from this rhizodeposition can increase microbial activity, which might help degrade contaminants. We studied the effect of three types of stress on root exudation of crested wheatgrass (Agropyron
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2

Curnow, Philip Kenneth. "Influence of root exudates on rhizosphere pseudomonads." Thesis, Imperial College London, 1998. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.286230.

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3

Shi, Shengjing. "Influence of root exudates on soil microbial diversity and activity." Lincoln University, 2009. http://hdl.handle.net/10182/1549.

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Interactions between plant roots and soil microorganisms in the rhizosphere are critical for plant growth. However, understanding of precisely how root exudates influence the diversity and activity of rhizosphere microorganisms is limited. The main objective of this study was to investigate the effect of radiata pine (Pinus radiata) root exudates on rhizosphere soil microbial communities, with an emphasis on the role of low molecular weight organic anions. The study involved the development and validation of new methods for investigating rhizosphere processes in a purpose-built facility. This
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4

Vives, Peris Vicente. "Interaction of citrus root exudates with plant growth promoting rhizobacteria under abiotic stress conditions." Doctoral thesis, Universitat Jaume I, 2018. http://hdl.handle.net/10803/461915.

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En la naturaleza las plantas liberan constantemente a la rizosfera una mezcla de metabolitos conocida como exudados radiculares. Su composición puede verse afectada por diferentes estímulos, incluyendo estreses abióticos como la salinidad o elevadas temperaturas. El Capítulo 1 demuestra que los portainjertos de cítricos citrange Carrizo y Citrus macrophylla exudan diferentes concentraciones de prolina y fitohormonas dependiendo del estrés abiótico y del genotipo. El Capítulo 2 estudia el efecto de dichos exudados de plantas de cítricos sometidas a salinidad y calor sobre las rizobacterias Pseu
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5

Curlango-Rivera, Gilberto. "Function of Root Border Cells and their Exudates on Plant Defense in Hydroponic Systems." Diss., The University of Arizona, 2011. http://hdl.handle.net/10150/202535.

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Controlled environment agriculture offers a solution to challenges including less available land, water deficits, and consumer demand for pesticide free produce. However, control of soil-borne diseases is a major limiting factor. The goal of this dissertation was to examine predictions of the hypothesis that border cells function to protect plant health by controlling microorganisms associated with plants grown in hydroponic culture. Border cells separate from root tips upon immersion in water, and appear to have important roles in the defense mechanisms of plant roots. The general objectives
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6

Medina, Rachel Morales. "Investigation of Maize Root Exudates on Heterodera glycines Populations under Direct and Indirect Exposure." The Ohio State University, 2017. http://rave.ohiolink.edu/etdc/view?acc_num=osu1482499805741097.

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7

Kierul, Kinga. "Comprehensive proteomic study of Bacillus amyloliquefaciens strain FZB42 and its response to plant root exudates." Doctoral thesis, Humboldt-Universität zu Berlin, Mathematisch-Naturwissenschaftliche Fakultät I, 2013. http://dx.doi.org/10.18452/16805.

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Bacillus amyloliquefaciens FZB42 ist ein frei lebendes Bakterium, das Pflanzenwurzeln besiedelt und das Pflanzenwachstum durch viele verschiedene Wirkmechanismen anregt. In dieser Arbeit wurden die molekularen Grundlagen dieser positiven Wirkungen, die dieses „Pflanzenwachstum fördernde Rhizobakterium“ (PGPR) auf seine Wirte ausübt, untersucht. Um den gegenseitigen Austausch von B. amyloliquefaciens und seinen Wirtspflanzen zu entschlüsseln, wurden umfangreiche Proteomstudien durchgeführt. Es wurden Referenzkarten der extrazellulären und zytosolischen Proteinfraktionen erstellt. Die größte A
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8

Sun, Lijuan. "Study on the mechanisms of rhizosphere priming effects induced by root exudates in a temperate broad-leaved forest." Kyoto University, 2018. http://hdl.handle.net/2433/232351.

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Kyoto University (京都大学)<br>0048<br>新制・課程博士<br>博士(農学)<br>甲第21150号<br>農博第2276号<br>新制||農||1059(附属図書館)<br>学位論文||H30||N5124(農学部図書室)<br>京都大学大学院農学研究科地域環境科学専攻<br>(主査)教授 北山 兼弘, 教授 小杉 緑子, 教授 本田 与一<br>学位規則第4条第1項該当
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9

Morris, Kendalynn A. "Nitrogen Cycling in the Rhizosphere of Cheatgrass and Crested Wheatgrass: Contributions of Root Exudates and Senescence." DigitalCommons@USU, 2014. https://digitalcommons.usu.edu/etd/3566.

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Cheatgrass is an invasive weed that has come to dominate large areas of the western United States. Once an ecosystem has been converted to a cheatgrass monoculture, it is extremely difficult to restore native vegetation. Cheatgrass negatively impacts wildlife and increases wildfire frequency and intensity. Understanding how cheatgrass so effectively invades western ecosystems is essential to turning the tide of invasion. One possible key to cheatgrass’ success is alteration of soil nutrient cycling. The goal of this study is to explore how nitrogen (N) may accumulate in cheatgrass soils via re
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10

Khorassani, Reza. "Identification by HPLC-MS of new detected compounds in sugar beet root exudates for soil P mobilization." Göttingen Cuvillier, 2008. http://d-nb.info/989316955/04.

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11

Dietz, Sophie [Verfasser], Dierk [Gutachter] Scheel, Helge [Gutachter] Bruelheide, and Dam Nicole Marie [Gutachter] van. "Root exudates in the grassland ecosystem / Sophie Dietz ; Gutachter: Dierk Scheel, Helge Bruelheide, Nicole Marie van Dam." Halle (Saale) : Universitäts- und Landesbibliothek Sachsen-Anhalt, 2019. http://d-nb.info/1210728699/34.

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12

Dietz, Sophie [Verfasser], Dierk Gutachter] Scheel, Helge [Gutachter] [Bruelheide, and Dam Nicole Marie [Gutachter] van. "Root exudates in the grassland ecosystem / Sophie Dietz ; Gutachter: Dierk Scheel, Helge Bruelheide, Nicole Marie van Dam." Halle (Saale) : Universitäts- und Landesbibliothek Sachsen-Anhalt, 2019. http://nbn-resolving.de/urn:nbn:de:gbv:3:4-1981185920-141553.

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13

Fang, Xingxiao. "Chemical Composition of Soybean Root Epidermal Cell Walls." Thesis, University of Waterloo, 2006. http://hdl.handle.net/10012/1281.

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The root epidermis, being the outermost cell layer of the organ, is in contact with the soil environment. The position of the epidermis determines its important roles, such as taking up water and ions from the surrounding soil, and defending against harmful microorganisms. What is the chemical composition of the walls in this layer? The chemical nature of the soybean epidermal wall modifying substance was investigated in this study with the use of histochemical tests coupled with electron microscopy, and chemical depolymerizations in combination with chromatography. Soybean (<em>Glycine
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14

Herz, Katharina [Verfasser]. "Drivers of intraspecific variation of plant functional traits, plant performance and root exudates in German grasslands / Katharina Herz." Halle, 2017. http://d-nb.info/1142155315/34.

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15

Fan, Ben. "Plant colonization by GFP-labeled Bacillus amyloliquefaciens FZB42 and transcriptomic profiling of its response to plant root exudates." Doctoral thesis, Humboldt-Universität zu Berlin, Mathematisch-Naturwissenschaftliche Fakultät I, 2011. http://dx.doi.org/10.18452/16267.

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In dieser Arbeit wurden zunächst die Kolonisationen von drei verschiedenen Pflanzengattungen durch den GFP-markierten Bacillus amyloliquefaciens FZB42 mittels confocaler Lasermikroskopie und Elektronmikroskopie verfolgt. Hier konnte gezeigt werden, dass FZB42 alle ausgewählten Pflanzen besiedeln konnte. Bei Arabidopsis- und Maiskeimlingen wurden die Wurzelhaare und Verbindungen, an denen laterale Wurzeln entstehen, durch FZB42 bevorzugt besiedelt. Weiterhin wurden bei Arabidopsis die Spitzen der Primärwurzeln, und bei Mais die Wurzelkerben bevorzugt besiedelt. Bei Lemna wurden FZB42 Zellansamm
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16

Xue, Lingru. "Glycerolipid biosynthesis in pea root plastids." Thesis, McGill University, 1993. http://digitool.Library.McGill.CA:80/R/?func=dbin-jump-full&object_id=26186.

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Pea root plastids were isolated by differential centrifugation and resulting crude plastid fraction was purified by centrifugation through 10%(v/v) Percoll. Marker enzymes indicated that greater than 50% of the plastids were recovered essentially free from mitochondrial and endoplasmic reticulum contamination. The optimum in vitro conditions for glycerolipid biosynthesis from (U-$ sp{14}$C) glycerol-3-phosphate have been determined. Total glycerolipid biosynthesis was approximately 15 nmole/hr/mg protein in the presence of 200 $ mu$M glycerol-3-phosphate, 0.5 mM each of NADH and NADPH, 15 mM K
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17

Akter, Pervin [Verfasser], Petr [Akademischer Betreuer] [Gutachter] Karlovsky, and Franz [Gutachter] Hadacek. "Plant Root Exudates : Variation between Species and Reaction to Water Deficit / Pervin Akter ; Gutachter: Petr Karlovsky, Franz Hadacek ; Betreuer: Petr Karlovsky." Göttingen : Niedersächsische Staats- und Universitätsbibliothek Göttingen, 2017. http://d-nb.info/1125105968/34.

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18

Valori, Federico. "Effects of root exudates on cadmium bioavailability in the rhizosphere : assessment of cadmium toxicity to plants and microorganisms, and soil remediation." Bordeaux 1, 2006. http://www.theses.fr/2006BOR13151.

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Des sols contaminés uniquement en Cd, depuis une longue période, ont d'abord été utilisés pour évaluer les effets d'exsudats racinaires de faible masse moléculaire, libérés dans un système modèle par un filtre placé à la surface du sol, sur les biomasses microbiennes carbonées et azotées, la respiration microbienne, le pool inorganique d'N et la biodisponibilité de Cd dans la rhizosphère (BIOMET®). L'utilisation d'une espèce végétale, Holcus lanatus L. , pour la phytoremédiation aidée de sols contaminés en Cd a été étudiée de façon préliminaire en solution hydroponique sur 4 semaines. Les plan
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19

Heim, Alexander. "Chelating organic substances in roots and root exudates and their potential role in aluminium resistance of Norway Spruce (Picea abies (L.) Karst.) /." [S.l.] : [s.n.], 2000. http://e-collection.ethbib.ethz.ch/show?type=diss&nr=13807.

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20

Guo, Jingqi. "THE INFLUENCE OF TALL FESCUE CULTIVAR AND ENDOPHYTE STATUS ON ROOT EXUDATE CHEMISTRY AND RHIZOSPHERE PROCESSES." UKnowledge, 2014. http://uknowledge.uky.edu/pss_etds/50.

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Tall fescue (Lolium arundinaceum (Schreb.) Darbysh.) is a cool-season perennial grass used in pastures throughout the Southeastern United States. The grass can harbor a fungal endophyte (Epichloë coenophiala) thought to provide the plant with enhanced resistance to biotic and abiotic stress. However, the alkaloids produced by the common variety of the endophyte cause severe animal health issues resulting in a considerable amount of research focused on eliminating the toxic class of alkaloids while retaining the positive abiotic and biotic stress tolerance attributes of the other alkaloids. In
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21

McCune, Letitia M. "Characterization of galactolipid synthesis in pea root plastids." Thesis, McGill University, 1995. http://digitool.Library.McGill.CA:80/R/?func=dbin-jump-full&object_id=22858.

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The capacity of pea root plastids for galactolipid synthesis was investigated utilizing radiolabelled acetate and UDP-galactose. Galactolipid biosynthesis was completely dependent on an exogenous supply of UDP-galactose. UDP-galactose stimulated both total lipid biosynthesis from acetate and the proportion of radioactivity accumulated in monogalactosyldiacylglycerol (MGDG). The proportion of MGDG synthesized was saturated at 30$ mu$M UDP-galactose and represented approximately 30% of the total lipid radioactivity after a one hour incubation. However, total lipid biosynthesis continued to incre
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22

McManus, Paul. "Rhizosphere Interactions Between Copper Oxide Nanoparticles and Wheat Root Exudate in a Sand Matrix; Influences on Bioavailability and Uptake." DigitalCommons@USU, 2016. https://digitalcommons.usu.edu/etd/5058.

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Copper oxide nanoparticles (NPs) are used in an expanding range of industries including a potential for agricultural applications as a fungicide. Accidental spills or misapplication of CuO NPs may lead to soil contamination. Plant roots exude a wide range of organic chemicals for bioprotection and to enhance bioavailability of nutrients. Many of these chemicals are metal chelators that may increase the solubility of CuO NPs, thus enhancing the impact of these NPs on plants. This work was directed towards understanding which plant exudates force increased solubility of CuO NPs and to determine
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23

Kierul, Kinga [Verfasser], Rainer [Akademischer Betreuer] Borriss, Thomas [Akademischer Betreuer] Schweder, and Thomas [Akademischer Betreuer] Eitinger. "Comprehensive proteomic study of Bacillus amyloliquefaciens strain FZB42 and its response to plant root exudates / Kinga Kierul. Gutachter: Rainer Borriss ; Thomas Schweder ; Thomas Eitinger." Berlin : Humboldt Universität zu Berlin, Mathematisch-Naturwissenschaftliche Fakultät I, 2013. http://d-nb.info/1041284608/34.

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24

Kierul, Kinga [Verfasser], Rainer Akademischer Betreuer] Borriss, Thomas [Akademischer Betreuer] Schweder, and Thomas [Akademischer Betreuer] [Eitinger. "Comprehensive proteomic study of Bacillus amyloliquefaciens strain FZB42 and its response to plant root exudates / Kinga Kierul. Gutachter: Rainer Borriss ; Thomas Schweder ; Thomas Eitinger." Berlin : Humboldt Universität zu Berlin, Mathematisch-Naturwissenschaftliche Fakultät I, 2013. http://nbn-resolving.de/urn:nbn:de:kobv:11-100212224.

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25

au, A. Jayasekera@murdoch edu, and Arunodini Uthpalawanna Jayasekera. "Interactions between Phytophthora cinnamomiand Acacia pulchella: consequences on ecology and epidemiology of the pathogen." Murdoch University, 2006. http://wwwlib.murdoch.edu.au/adt/browse/view/adt-MU20061129.134500.

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Phytophthora cinnamomi is an important pathogen of many plant species in natural ecosystems and horticulture industries around the world. In Western Australia, a high proportion of native plant species are susceptible to P. cinnamomi attack. Acacia pulchella, a resistant legume species native to Western Australia has been considered as a potential biological control tool against P. cinnamomi. To develop effective control methods, it is important to understand the interactions between the control agent and the different life forms of the pathogen. In this thesis the interactions are investigate
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26

Schreiber, Christina [Verfasser], Uwe [Akademischer Betreuer] Rascher, and Andreas [Akademischer Betreuer] Weber. "Rhizosphere dynamics of higher plants in the water fluctuation zone of Yangtze River : Root exudates and mass flow / Christina Schreiber. Gutachter: Uwe Rascher ; Andreas Weber." Düsseldorf : Universitäts- und Landesbibliothek der Heinrich-Heine-Universität Düsseldorf, 2011. http://d-nb.info/1015434738/34.

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27

Hassan, Ahmed Abdulla Mohamed. "The interactions between Yemeni wheat and barley cultivars and isolates of Cochliobolus sativus and the role of root exudates and toxins in susceptibility and pathogenicity." Thesis, University of Newcastle Upon Tyne, 1999. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.299426.

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28

Li, Hongping 1967. "Developmental relationships in the function of pea root plastids." Thesis, McGill University, 2000. http://digitool.Library.McGill.CA:80/R/?func=dbin-jump-full&object_id=30823.

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Germinating pea (Pisum sativum L.) roots were divided into five sequential 0.5 cm segments from the root tip. Pooled segments were analyzed for their protein, starch and lipid content as an indirect indication of plastid function. Fresh weights of root segments were lowest in the tips (4.45mug per segment) and progressively higher up to the fifth segment (11.09mug per segment). Total protein, starch and lipid content, on a per segment basis, were all highest in zone 1 (tip segment) and progressively lower up to zone 5. Plastids were isolated from each of the five root segments and analyzed for
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29

Stahl, Richard J. (Richard John). "Fatty acid and glycerolipid biosynthesis in pea root plastids." Thesis, McGill University, 1990. http://digitool.Library.McGill.CA:80/R/?func=dbin-jump-full&object_id=22389.

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Fatty acid biosynthesis from (1-$ sp{14}$C) acetate was optimized in plastids isolated from primary root tips of 7-day-old germinating pea seeds. Fatty acid synthesis was maximum at 82.3 nmol/hr/mg protein in the presence of 200$ mu$M acetate, 0.5mM each of NADH, NADPH and CoA, 6mM each of ATP and MgCl$ sb2$, 1mM each of MnCl$ sb2$ and glycerol-3-phosphate (G3P), 15mM KHCO$ sb3$, and 0.1M Bis tris propane, pH 8.0 incubated at 35C. At the standard incubation temperature of 25C, fatty acid synthesis was linear for up to 6 hours with 80 to 120 $ mu$g/ml plastid protein. ATP and CoA were absolute
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30

Fan, Ben [Verfasser], Rainer [Akademischer Betreuer] Borriss, Thomas [Akademischer Betreuer] Börner, and Rudolf [Akademischer Betreuer] Ehwald. "Plant colonization by GFP-labeled Bacillus amyloliquefaciens FZB42 and transcriptomic profiling of its response to plant root exudates / Ben Fan. Gutachter: Rainer Borriss ; Thomas Börner ; Rudolf Ehwald." Berlin : Humboldt Universität zu Berlin, Mathematisch-Naturwissenschaftliche Fakultät I, 2011. http://d-nb.info/1015016537/34.

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31

Foreman, P. C. "The micromorphology and composition of mineralised deposits within the root-canal systems of permanent human teeth." Thesis, University of Newcastle Upon Tyne, 1986. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.373054.

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32

Stone, Alexandra G. "Characterization of compost composition and its relationship to the suppression of pythium root rot of cucumber /." The Ohio State University, 1997. http://rave.ohiolink.edu/etdc/view?acc_num=osu1487948807586463.

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33

Marshall, Jonathan Coid, and n/a. "Factors Influencing the Composition of Faunal Assemblages in Rainforest Stream Pools." Griffith University. Australian School of Environmental Studies, 2001. http://www4.gu.edu.au:8080/adt-root/public/adt-QGU20040218.150407.

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Previous research has shown that a range of physical and biological drivers can influence the composition of faunal assemblages occupying localities within streams. There is much debate in the literature about which of these is more important. Descriptive and experimental field studies were conducted in two relatively undisturbed, second order rainforest streams in southeast Queensland, Australia. The principal objectives were to describe spatial and temporal patterns in pool fauna and explore relationships between these patterns and physical attributes of habitat, disturbance and biotic in
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34

Javed, Muhammad Tariq. "Mechanisms behind pH changes by plant roots and shoots caused by elevated concentration of toxic elements." Doctoral thesis, Stockholms universitet, Botaniska institutionen, 2011. http://urn.kb.se/resolve?urn=urn:nbn:se:su:diva-64324.

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Toxic elements are present in polluted water from mines, industrial outlets, storm water etc. Wetland plants take up toxic elements and increase the pH of the medium. In this thesis was investigated how the shoots of submerged plants and roots of emergent plants affected the pH of the surrounding water in the presence of free toxic ions. The aim was to clarify the mechanisms by which these plants change the surrounding water pH in the presence of toxic ions. The influence of Elodea canadensis shoots on the pH of the surrounding water was studied in the presence of cadmium (Cd) at low initial p
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35

Hill, Brycen Thomas. "Root restriction, under-trellis cover cropping, and rootstock modify vine size and berry composition of Cabernet Sauvignon." Thesis, Virginia Tech, 2017. http://hdl.handle.net/10919/75223.

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Vineyards in the Mid-Atlantic often have large, vigorous vines that can be costly to manage and produce inadequate fruit for wine production. Dense canopies increase the incidence of fungal disease, require greater allocation of resources to manage, and inhibit fruit development. The primary objective of these studies was to determine effective vine-size modification treatments that would optimize fruit quality, while reducing labor and chemical control. Research factors included root manipulation, under-trellis ground cover, and rootstock. Treatment levels were root bag (RBG) or no root m
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Hatch, Tremain Archer. "Groundcover, rootstock and root restriction effects on vegetative growth, crop yield components, and fruit composition of Cabernet Sauvignon." Thesis, Virginia Tech, 2010. http://hdl.handle.net/10919/78134.

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Wine vineyards in humid environments like the mid-Atlantic United States are characterized by vines that develop too much vegetative growth for optimum quality wine production. Cover crops, rootstocks and rootzone restriction were evaluated for their effect on vegetative and reproductive growth on Cabernet Sauvignon. Treatments were arranged in a strip-split-split plot arrangement with under-trellis cover crops (UTCC) compared to row-middle only cover crop combined with 1-m weed-free strips in the vine row as main plots. Rootstocks riparia Gloire, 420-A, and 101-14 were sub-plots, while sub-su
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Jothimuthu, Preetha. "Environmentally-friendly disposable Lab-on-a-chip Sensor for Point-of-Care Measurement of Heavy Metals." University of Cincinnati / OhioLINK, 2011. http://rave.ohiolink.edu/etdc/view?acc_num=ucin1306518480.

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38

Qi, Qungang. "The role of glycolytic metabolism in fatty acid and glycerolipid biosynthesis in pea root plastids." Thesis, McGill University, 1995. http://digitool.Library.McGill.CA:80/R/?func=dbin-jump-full&object_id=39980.

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The interaction between the glycolytic metabolism and fatty acid and glycerolipid biosynthesis in pea root (Pisum sativum L.) plastids was assessed in this study. When various glycolytic intermediates were used to substitute for the APT requirement for fatty acid synthesis from acetate, phosphoenolpyruvate, 2-phosphoglycerate, fructose-6-phosphate and glucose-6-phosphate each gave 48, 17, 23 and 17%, respectively, of the ATP-control activity. Similarly, in the absence of exogenously supplied ATP, the optimized triose-phosphate shuttle, which consists of 2 mM dihydroxyacetone phosphate, 2 mM ox
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Packer, Kirsten F. "Evaluating the importance of root abscission versus efflux to plant N-loss: consequences for plant N-isotope composition." Master's thesis, University of Cape Town, 2018. http://hdl.handle.net/11427/28152.

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The common observation that plant δ¹⁵N values are lower than those of associated soil is generally attributed to transporter-facilitated efflux of ¹⁵N-enriched N. N efflux tends to occur under specific conditions, for instance, when the external N concentration is high, when the external medium is acidic and when roots experience mechanical stress. While efflux is presumed to act as a regulator of cytoplasmic N concentrations, it is energetically costly for plants to take up N only to release it back into the rhizosphere. A link between root tissue loss (e.g. root turnover or rhizodeposition)
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Clough, Elizabeth Anne, and n/a. "Factors Influencing Ant Assemblages and Ant Community Composition in a Sub-Tropical Suburban Environment." Griffith University. School of Environmental and Applied Science, 2004. http://www4.gu.edu.au:8080/adt-root/public/adt-QGU20040719.141317.

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The main objective of this study was to examine the abundance and diversity of ants in suburban sites following vegetation removal or modification for development. This research examines the capacity of suburban sites to support ant diversity, which is dependent on the site characteristics and their surrounding environment. The study focused on 29 suburban garden and 3 suburban reserve sites on the Gold Coast, Queensland, Australia. This region, through continuing land development, undergoes ongoing habitat disturbance and modification. Ground-dwelling ants were collected by pitfall trapping
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41

Cavalcanti, Guadalupe Gatto Lockaby Bruce Graeme. "Effects of sediment deposition in aboveground net primary productivity, vegetation composition, structure, and fine root dynamics in riparian forests." Auburn, Ala, 2004. http://repo.lib.auburn.edu/EtdRoot/2004/SPRING/Forestry_and_Wildlife_Sciences/Thesis/CAVALCANTI_GUADALUPE_18.pdf.

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42

McKenny, Claire, and n/a. "The Diversity of Macroinvertebrate Grazers in Streams: Relationships With the Productivity and Composition of Benthic Algae." Griffith University. Australian School of Environmental Studies, 2005. http://www4.gu.edu.au:8080/adt-root/public/adt-QGU20060308.131239.

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There has been much interest in the last decade concerning the factors that influence diversity, especially how diversity and ecosystem processes may be linked. This study was based in small, cobble streams in South East Queensland. Its aim was to determine how the diversity and composition of consumers (the grazer guild) is influenced by both the production and composition of benthic algae, at different spatial scales. It also aimed to ascertain whether this response differs among grazer sub guilds with different dispersal capabilities. Ten sites in the Upper Brisbane and Mary catchments were
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McKenny, Claire. "The Diversity of macroinvertebrate grazers in streams relationships with the productivity and composition of benthic algae /." Click here to access, 2005. http://www4.gu.edu.au:8080/adt-root/public/adt-QGU20060308.131239.

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Marques, Anderson Cesar Ramos. "FIXAÇÃO BIOLÓGICA DE NITROGÊNIO E MICORRÍZAÇÃO EM GRAMÍNEAS DOS CAMPOS SULINOS." Universidade Federal de Santa Maria, 2014. http://repositorio.ufsm.br/handle/1/4869.

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Empresa Brasileira de Pesquisa Agropecuária<br>The knowledge of the level of association that occurs between diazotrophic bacteria and fungi arbusculares mycorrhizae (AMF) in grassland ecosystems may be important for the understanding of the changes caused by the addition of fertilizers containing phosphorus (P) and nitrogen (N), in the production and botanical composition of natural pastures. The objective of this study was to evaluate. (a) the occurrence of three genera of diazotrophic bacterial in the root system under fertilization with N and P, and determine the contribution of N via BNF,
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Neuschütz, Clara. "Phytostabilization of mine tailings covered with fly ash and sewage sludge." Doctoral thesis, Stockholms universitet, Botaniska institutionen, 2009. http://urn.kb.se/resolve?urn=urn:nbn:se:su:diva-8452.

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Establishing plant communities is essential for the restoration of contaminated land. As potential cover materials, fly ash and sewage sludge can prevent formation of acid mine drainage from sulfidic mine waste. The aim of the thesis was to i) screen for plants that can be established in, and prevent leakage of metals and nutrients from sludge on top of ash and tailings, and ii) investigate root growth into sealing layers of ash and sludge. Analyses were performed under laboratory, greenhouse and field conditions using selected plant species to examine the release of Cd, Cu, Zn, N, and P from
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Zamora-Ledezma, Ezequiel. "Evidences for an indirect effect of root functional traits and plant composition on soil microbial activities in Mediterranean rangelands : a spatial and temporal approach." Thesis, Montpellier 2, 2013. http://www.theses.fr/2013MON20176/document.

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Il est de plus en plus admis que pour comprendre le fonctionnement des écosystèmes, une approche aérienne associée à une approche souterraine est nécessaire en raison des rétroactions entre plantes et sol. La structure des communautés végétales peut affecter le fonctionnement du sol en altérant la quantité et la qualité des ressources intégrant le sol. Les contrôles abiotiques des processus microbiens du sol sont largement documentés, mais les potentiels effets de la composition de la communauté végétale et des traits racinaires sont peu connus. L'étude a été menée sur des prairies méditerrané
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Xia, Yang. "Impact of varying NH₄⁺˸NO₃⁻ ratios in nutrient solution on C-isotope composition of leaf- and root-respired CO₂ and putative respiratory substrates in C₃ plants." Thesis, Université Paris-Saclay (ComUE), 2019. http://www.theses.fr/2019SACLS222.

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La composition isotopique (¹³C/¹²C) du CO₂ respiré par les feuilles et les racines dans l'obscurité et celle des substrats respiratoires putatifs, y compris les sucres solubles et les acides organiques (malate et citrate), l'activité de la PEPc ainsi que les échanges gazeux des feuilles ont été déterminés sur le haricot (Phaseolus vulgaris L.) et l’épinards (Spinacia oleracea L.) cultivés dans du sable avec différents rapports NH₄⁺: NO₃⁻ dans N fourni. Le CO₂ respiré par les feuilles était enrichi en ¹³C sous NO₃⁻ s’appauvrissant progressivement avec l’augmentation de la fraction de NH₄⁺ dans
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Santos, Paulo Cézar das Mercês. "Phytophthora nicotianae: ação de meios de cultura e da qualidade da luz no crescimento e esporulação e aspectos fisiológicos e bioquímicos da interação com porta-enxertos cítricos." Universidade de São Paulo, 2015. http://www.teses.usp.br/teses/disponiveis/11/11135/tde-05012016-105803/.

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A citricultura brasileira apresenta números bastante significativos e expressivos, refletindo a grande importância social e econômica que essa atividade agrícola e industrial tem para a economia do país. O Brasil se destaca como o maior produtor de laranja do mundo. As plantas cítricas podem ser produzidas e multiplicadas de várias formas e a enxertia é a forma de propagação vegetativa mais utilizada comercialmente no Brasil. Dentre os porta-enxertos mais empregados, sobressaem-se o citrumeleiro Swingle e a tangerineira Sunki. Apesar das vantagens presentes nesses dois genótipos, a produção de
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Carreras, Alexis. "Caractérisations biochimique et microscopique du piège extracellulaire de racine et des exsudats racinaires de trois essences ligneuses sahéliennes : balanites aegyptiaca D., Acacia tortilis subsp. raddiana S., et tamarindus indica L." Thesis, Normandie, 2018. http://www.theses.fr/2018NORMR017.

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La coiffe racinaire est cruciale à la croissance et survie du méristème subapical de racine. Elle libère des cellules frontières (CFs) qui assurent la protection de l’apex racinaire. Les CFs associées à leur mucilage forment le piège extracellaire de racine (RET). La caractérisation du RET et des exsudats racinaires de trois essences ligneuses sahéliennes à partir de plantules cultivées in vitro a été réalisée. B. aegyptiaca et A. raddiana prospèrent dans les zones semi-arides, à l’opposé de T. indica. La morphologie des CFs et l’organisation du RET ont été déterminées par microscopie. La comp
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Yang, Luhua [Verfasser], Michael [Akademischer Betreuer] Schloter, Caroline [Gutachter] Gutjahr, and Michael [Gutachter] Schloter. "The role of the seed microbiome of barley (Hordeum vulgare) as driver for the composition of root endophytes / Luhua Yang ; Gutachter: Caroline Gutjahr, Michael Schloter ; Betreuer: Michael Schloter." München : Universitätsbibliothek der TU München, 2020. http://d-nb.info/1215293399/34.

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