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Dissertations / Theses on the topic 'Medicaqo sativa L'

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Published: 3 June 2025

Last updated: 31 July 2025

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1

Bernal, Libia Maritza. "Bio-engineering alfalfa (Medicago sativa L.) to accumulate fructans." Thesis, National Library of Canada = Bibliothèque nationale du Canada, 2001. http://www.collectionscanada.ca/obj/s4/f2/dsk3/ftp04/MQ61873.pdf.

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2

Rodrigues, Sandra Maria Gonçalves. "Caracterização de Sinorhizobium sp. isolado de Medicago sativa L." Master's thesis, Universidade de Aveiro, 2009. http://hdl.handle.net/10773/832.

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Mestrado em Biologia Molecular e Celular<br>A utilização de luzernas (Medicago sativa L. e Medicago polymorpha L.) em pastagens na zona mediterrânea requer a inoculação de sementes com estirpes de Sinorhizobium (S. meliloti e S. medicae) eficazes e bem adaptadas às condições de clima semi-árido que prevalecem nesta região. Este trabalho teve como objectivo caracterizar a população de Sinorhizobium de um solo do Alentejo (Elvas-ENMP), isolada de nódulos de diferentes cultivares de M. sativa (ABT, Coussouls, Magali, Melissa e Mamuntanas), através da avaliação da diversidade genética e da eficáci

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3

McKimmie, Timothy Irving 1948. "CHARACTERIZATION OF SALT TOLERANCE IN ALFALFA (MEDICAGO SATIVA L.)." Thesis, The University of Arizona, 1986. http://hdl.handle.net/10150/276348.

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4

Gregory, Abigail C. E. "The metabolism of isoflavonoid phytoalexins in alfalfa (Medicago sativa L.)." Thesis, Durham University, 1995. http://etheses.dur.ac.uk/5422/.

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The synthesis of isoflavonoid phytoalexins in legumes is relatively well understood, but far less is known about how these phytotoxic compounds are metabolised by the plant when no longer required. In this project medicarpin, the major isoflavonoid phytoalexin in alfalfa, was prepared in radiolabelled form and fed to cell cultures and seedlings of alfalfa. The metabolism of the radioactive phytoalexin was then studied by characterising the radiolabelled metabolites formed. Uptake of radiolabelled phytoalexin by cells was faster in elicitor-treated cultures than in untreated cultures. However,

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5

Ramachandran, Rupesh Ram Kariyat. "Alternate methods for cultivar synthesis in alfalfa (Medicago sativa L.)." Laramie, Wyo. : University of Wyoming, 2007. http://proquest.umi.com/pqdweb?did=1400950151&sid=1&Fmt=2&clientId=18949&RQT=309&VName=PQD.

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6

Anthes, Johann. "Beitrag von Ackerbohne (Vicia faba L.), Luzerne (Medicago sativa L.) und Saatwicke (Vicia sativa L.) zur Selbstregelung der N-Zufuhr in leguminosenbasierten Fruchtfolgen." Doctoral thesis, [S.l.] : [s.n.], 2005. http://deposit.ddb.de/cgi-bin/dokserv?idn=975015044.

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7

Babij, Vivian. "Post-harvest resistance to fungal attack in alfalfa, Medicago sativa L." Thesis, National Library of Canada = Bibliothèque nationale du Canada, 1997. http://www.collectionscanada.ca/obj/s4/f2/dsk2/ftp04/mq23206.pdf.

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8

Murnaghan, Julia M. W. "Winter survival in transgenic alfalfa (Medicago sativa L.) expressing superoxide dismutase." Thesis, National Library of Canada = Bibliothèque nationale du Canada, 2000. http://www.collectionscanada.ca/obj/s4/f2/dsk1/tape2/PQDD_0031/MQ47350.pdf.

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9

Tang, M. "Elicitor-induced defence response and signal mechanisms in Medicago sativa L." Thesis, Swansea University, 2002. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.639158.

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In this study, the responses and signal mechanisms were explored with a model system, concerning the interactions between lucerne suspension cells (<I>Medicago sativa</I> L., cv. Kabul) and elicitor either from avirulent (V2) or virulent (V1) isolate of <I>Verticillium, alboatrum</I>. V2 elicitor induced a two-phase of H<SUB>2</SUB>O<SUB>2</SUB> accumulation in the cell cultures. Activation of defence expression led to an increase in PAL activity, phytoalexin accumulation and deposition of phenolic polymers. However, activities of antioxidant enzymes, such as catalase, peroxidases, glucanase,

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10

Wang, Yang. "Expression of rd29a cold responsive promoter elements in alfalfa, Medicago sativa L." Thesis, National Library of Canada = Bibliothèque nationale du Canada, 1998. http://www.collectionscanada.ca/obj/s4/f2/dsk2/ftp03/MQ27553.pdf.

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11

Nabinger, Carlos. "Modelo morfogênico da produção potencial de flores em alfafa (Medicago sativa L.)." reponame:Biblioteca Digital de Teses e Dissertações da UFRGS, 2002. http://hdl.handle.net/10183/6017.

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Assegurando-se condições não limitantes de radiação incidente, água e nutrientes, acompanhou-se, em casa-de-vegetação, o desenvolvimento de plantas isoladas da cultivar Europe de alfafa, desde a emergência até o estádio primeiros legumes maduros. Medidas semanais permitiram quantificar o ritmo de formação de fitômeros da haste principal e suas ramificações primárias, assim como o surgimento de inflorescências e seu número de flores. Paralelamente, plantas mantidas nas mesmas condições foram amostradas para determinar a evolução e repartição da biomassa formada. Independentemente do tipo de has

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12

Shi, Niu 1963. "Demographic changes and genetic variation of an alfalfa (Medicago sativa L.) population." Thesis, The University of Arizona, 1991. http://hdl.handle.net/10150/277907.

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The objectives of this study were to describe demographic change in an alfalfa population and determine whether genetic changes were associated with stand loss in an alfalfa field during the year of establishment. A nondormant composite population (AZ-88NDC) was sown at 1944 seeds per square meter in Oct. 1988 at Tucson, AZ. Only 29% of the seeds sown germinated and emerged. Survivorship curve of the emerged seedling population had some characteristics of Deevey type III. Two heavy mortality periods were observed. Low temperatures might be the major cause of the first heavy stand loss. The sec

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13

Asbil, Wendy. "Early spring broadcast seeding to improve established stands of alfalfa (Medicago sativa L.)." Thesis, McGill University, 1989. http://digitool.Library.McGill.CA:80/R/?func=dbin-jump-full&object_id=61956.

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14

Bolanos, aguilar Edouardo Daniel. "Etude génétique de la production de graines chez la luzerne (Medicago sativa L. )." Rennes, Agrocampus Ouest, 2001. http://www.theses.fr/2001NSARC060.

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L'OBJECTIF DE CE TRAVAIL A ETE DE COMPRENDRE LES BASES AGRONOMIQUES ET GENETIQUES DU RENDEMENT GRAINIER DE LA LUZERNE, EN DEVELOPPANT SUCCESSIVEMENT TROIS ETUDES. UNE PREMIERE ETUDE SUR L'EFFET DU CULTIVAR ET DE L'ENVIRONNEMENT, REALISEE EN COUVERTS PORTE-GRAINES, A MONTRE QUE LES PRINCIPALES SOURCES DE VARIATION ENTRE CULTIVARS POUR LE RENDEMENT GRAINIER ETAIENT L'INDICE DE RECOLTE ET LE POIDS DE GRAINES PAR INFLORESCENCE. ENTRE ENVIRONNEMENTS, LA SOURCE DE VARIATION A ETE LA BIOMASSE AERIENNE DISPONIBLE AU MOMENT DE LA RECOLTE DE GRAINES. L'ETUDE GENETIQUE A EVALUER LA VARIABILITE ET LE CONT

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15

Fimbres, Anna Maria. "ISOLATION AND IDENTIFICATION OF A CYTOKININ FROM MEDICAGO SATIVA L. (ALFALFA, ZEATIN, HPLC)." Thesis, The University of Arizona, 1985. http://hdl.handle.net/10150/275305.

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16

Maureira, Espinosa Yenifert. "Aplicación de sanitizantes en brotes de alfalfa (Medicago sativa L.) conservados bajo atmósfera modificada." Tesis, Universidad de Chile, 2012. http://www.repositorio.uchile.cl/handle/2250/111118.

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Memoria para optar al título profesional de Ingeniero Agrónomo Mención Agroindustria<br>El objetivo de este estudio fue evaluar el efecto de distintos sanitizantes como hipoclorito de sodio (NaClO 100 mg L-1), dióxido de cloro (ClO2 5 y 10 mg L-1), ácido peroxiacético (APA 50 y 90 mg L-1) y clorito de sodio acidificado (CSA 250 y 500 mg L-1) sobre la carga microbiana y calidad sensorial en brotes de alfalfa envasados en atmósfera modificada pasiva conservados a 5º C por 7 días. En dos ensayos independientes se emplearon las mismas dosis de sanitizantes, pero diferentes bolsas con diferent

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17

Varella, Alexandre Costa. "Modelling lucerne (Medicago sativa L.) crop response to light regimes in an agroforestry system." Lincoln University, 2002. http://hdl.handle.net/10182/1477.

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The general goal of this research was to understand the agronomic and physiological changes of a lucerne crop in distinct physical radiation environments and to verify the potential of lucerne to grow under shaded conditions. To achieve this, the research was conducted in four main steps: (i) firstly, experimental data collection in the field using two artificial shade materials (shade cloth and wooden slats) under inigated and non-irrigated conditions; (ii) a second experiment with data collection in a typical temperate dryland agroforestry area under non-irrigated conditions; (iii) generatio

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18

Vadnais, Dave Allen. "Carbohydrate metabolism and freezing tolerance of alfalfa (Medicago sativa L.) expressing an invertase transgene." Thesis, National Library of Canada = Bibliothèque nationale du Canada, 2002. http://www.collectionscanada.ca/obj/s4/f2/dsk3/ftp04/NQ65838.pdf.

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19

Arthur, Fareed Kow Nanse. "Defense responses to fungal challenge in alfalfa (medicago sativa L.) plants and tissue cultures." Thesis, University of Nottingham, 1994. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.385239.

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20

Saraiva, Karla Médici. "Seleção de alfafa (Medicago sativa L.) para tolerância ao alumínio e aptidão ao pastejo." reponame:Biblioteca Digital de Teses e Dissertações da UFRGS, 2011. http://hdl.handle.net/10183/37799.

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A alfafa (Medicago sativa L.) é uma leguminosa com alto potencial produtivo, qualidade de forragem e flexibilidade de utilização. Quando bem manejada, é uma cultura capaz de fornecer forragem de qualidade e promover um aumento na produtividade dos rebanhos. Para a maior expansão desta forrageira no Brasil, torna-se necessário superar alguns entraves, como a falta de cultivares adaptadas às nossas condições de solo, baixa fertilidade do solo e inexistência de cultivares melhor adaptadas ao pastejo. O melhoramento genético de alfafa para tolerância a solos ácidos e aptidão ao pastejo, pode ser u

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21

Guines, Françoise. "BASES GENETIQUES DES VARIATIONS POUR LA STRUCTURE HISTOLOGIQUE DES TIGES DE LUZERNE (Medicago sativa L.)." Phd thesis, Agrocampus - Ecole nationale supérieure d'agronomie de rennes, 2002. http://tel.archives-ouvertes.fr/tel-00655243.

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Les tiges constituent l'élément fondamental du peuplement de luzerne et la partie aérienne limitant la digestibilité. Au cours de la croissance les tissus de soutien et de transport d'eau se mettent en place dans la tige. La proportion de ces tissus et des éléments constitutifs pourrait jouer un rôle déterminant dans leur dégradabilité. L'objectif de la thèse est de déterminer les bases génétiques des variations de la structure histologique des tiges de luzerne et d'établir la relation avec la digestibilité des tiges. Sur deux génotypes contrastés en digestibilité, différents caractères histol

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22

Crisóstomo, Vega María José. "Características funcionales y microbiológicas en brotes de alfalfa (Medicago sativa L.) tratados con diferentes sanitizantes." Tesis, Universidad de Chile, 2012. http://www.repositorio.uchile.cl/handle/2250/116076.

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Memoria para optar al título profesional de: Ingeniero Agrónomo Mención Agroindustria<br>No autorizada por el autor para ser publicada a texto completo<br>En este estudio se evaluó el efecto de los agentes sanitizantes sobre la calidad funcional y microbiológica en los brotes de alfalfa (Medicago sativa L.). Los brotes fueron sumergidos durante 5 minutos en soluciones sanitizantes de hipoclorito de sodio (HS; 100 mg L-1), ácido peroxiacético (APA; 90 mg L-1), dióxido de cloro (DC; 10 mg L-1) y clorito de sodio acidificado (CSA; 500 mg L-1), que luego fueron envasados en bolsas plásticas (60 g)

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23

Guines, Françoise. "Bases génétiques des variations pour la structure histologique des tiges de luzerne (Medicago sativa L. )." Rennes, Agrocampus Ouest, 2002. http://www.theses.fr/2002NSARC066.

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24

Téoule, Evelyne. "Élargissement de la variabilité génétique chez Medicago sativa L. Par hybridation somatique : intérêts et limitations." Paris 11, 1987. http://www.theses.fr/1987PA112433.

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Le genre Medicago appartient à la famille des Légumineuses; il comprend plus de 50 espèces largement réparties dans le monde. Une faible part de richesse génétique est exploitée. En effet l’espèce M. Sativa et dans une moindre mesure l’espèce M. Falcata constituent la base génétique de l’espèce cultivée. La sélection classique a donné beaucoup de résultats mais actuellement certains problèmes tels l’amélioration du rendement sont difficiles à résoudre. C’est pourquoi un travail sur l’augmentation de la variabilité génétique au sein de l’espèce cultivée a été entrepris. L’objectif était l’explo

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25

Téoule, Evelyne. "Elargissement de la variabilité génétique chez Medicago sativa L. par hybridation somatique intérêts et limitations /." Grenoble 2 : ANRT, 1987. http://catalogue.bnf.fr/ark:/12148/cb376102693.

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26

Nel, Leana. "The role of seed coating in the establishment and growth of Medicago sativa L. cultivars." Diss., University of Pretoria, 2013. http://hdl.handle.net/2263/41071.

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The use of coated seed to establish crops is not a novel practice. Seed coatings have been used on small seeded crops to improve the handling ability by making the seed unit larger and heavier. Producers can therefore calibrate their sowing equipment more efficiently and wind will not cause as much drift at sowing. Seed coating can have an added benefit for leguminous crops if the symbiotic inoculant (Rhizobium) is added to the coating. This saves the producer time and allows peace of mind that inoculation was done by trained professionals. Other than the inoculation, there are some other con

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27

Mvondo, Awono Jean Pierre. "Fertilisation azotée du maïs-grain, Zea mays L., en rotation avec une luzerne non dormante, Medicago sativa L. var. Nitro." Thesis, National Library of Canada = Bibliothèque nationale du Canada, 1997. http://www.collectionscanada.ca/obj/s4/f2/dsk3/ftp04/nq25253.pdf.

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28

Perez, Naylor Bastiani. "Melhoramento genético de leguminosas de clima temperado - alfafa (Medicago sativa L) e cornichão (Lotus corniculatus L) para aptidão ao pastejo." reponame:Biblioteca Digital de Teses e Dissertações da UFRGS, 2003. http://hdl.handle.net/10183/4303.

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O presente trabalho foi realizado com o objetivo de avaliar e selecionar genótipos de alfafa crioula e de cornichão cultivar São Gabriel para aptidão ao pastejo. Neste trabalho, foi proposto o termo aptidão ao pastejo em substituição à resistência ao pastejo. O procedimento padrão utilizado no processo de seleção e de caracterização dos genótipos constou de experimentos nos quais as plantas eram submetidas a uma pressão de pastejo elevada e contínua (3-5 cm de altura do resíduo). Houve diferença (P<0,05) na sobrevivência das diferentes populações de alfafa crioula, evidenciando variabilidade p

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29

Mohamad, Ramzi Muhiddin. "N2-Fixation in Alfalfa (Medicago sativa L.) Seedlings and Rhizobium meliloti L. Grown in Vitro Under Salt and Drought Stresses." DigitalCommons@USU, 1987. https://digitalcommons.usu.edu/etd/3417.

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Alfalfa, Medicago sativa L., cultivars, breeding lines and germplasm releases (populations) and Rhizobium meliloti L. strains that exhibit nitrogen fixation efficiency and tolerance to salinity and drought stresses should enhance seedling establishment, increase yields, reduce nitrogen dependency on petroleum-based nitrogen fertilizers, and allow wider use of irrigated lands in semiarid and a rid regions. In vitro experiments were conducted to determine relative salt (sodium chloride -- NaCl) tolerance: l) during germination and early seedling growth of 229 alfalfa populations from North Afric

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30

Al-Suhaibani, Nasser Abdul-Rahman. "Physiological studies on the growth and survival of Medicago sativa L. (alfalfa) seedlings under low temperatures." Thesis, University of Sheffield, 1996. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.388697.

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31

ALLIRAND, JEAN-MICHEL. "Modelisation morphologique de la croissance de la luzerne (medicago sativa l. ), en fonction de la temperature." Paris 11, 1998. http://www.theses.fr/1998PA112433.

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L'amelioration de la modelisation de la production de luzerne passe par une meilleure comprehension de la repartition de la biomasse a l'echelle de la plante. La repartition de la biomasse entre feuilles, tiges et parties souterraines depend de la vitesse de mise en place des structures aeriennes, mais est aussi modulee par la disponibilite en assimilats. Interpretes en termes d'offre et de demande, les faits observes sont coherents avec une hypothese de priorite de repartition vers les parties aeriennes. L'etablissement d'un modele de croissance et de repartition de la biomasse necessite d'et

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32

Warburton, Marilyn Louise 1968. "Variability in nondormant Medicago sativa L. ecotypes from India and their relationship to African and Arabian alfalfas." Thesis, The University of Arizona, 1991. http://hdl.handle.net/10150/277964.

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Understanding patterns of genetic diversity in crop species may enhance the efficiency of germplasm conservation and utilization. Nondormant alfalfa (Medicago sativa L.) is an important forage crop in southwest Arizona, and originates from low elevations of the Middle East and India. This study examined 60 accessions of nondormant alfalfa from India, north Africa and Arabia in a field trial in Tucson, AZ during 1989-91. Nondormant Indian and African alfalfas have previously been considered independent germplasm sources. Principal components of 6 morphological and 15 agronomic traits were used

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33

Al-Niemi, Thamir S. "Effect of Salinity (NaCl) on Germination, Growth, Ion Accumulation, and Protein Synthesis in Alfalfa (Medicago Sativa L.)." DigitalCommons@USU, 1993. https://digitalcommons.usu.edu/etd/3443.

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To study the effect of NaCl stress on gene expression in alfalfa (Medicago sativa L.), greenhouse and laboratory experiments were conducted with 22 cultivars during germination and post-germination growth. The ability of alfalfa cultivars to germinate at the different NaCl concentrations was not related to their postgermination performance (salt tolerance) under those conditions. Genetic effects were evident for Na and Cl ion uptake and accumulation in alfalfa shoots and roots. The strategies of alfalfa cultivars to cope with NaCl stress includes exclusion of Na from shoots and Cl from roots o

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34

Tardón, Machuca Alejandro Antonio. "Efecto de la radiación UV-C sobre la calidad en brotes de alfalfa (medicago sativa L.) conservados en atmósferas modificadas." Tesis, Universidad de Chile, 2011. http://www.repositorio.uchile.cl/handle/2250/112331.

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Memoria para optar al título profesional de Ingeniero Agrónomo<br>La industria de hortalizas mínimamente procesadas en fresco (MPF) utiliza comúnmente lavados con hipoclorito de sodio (NaClO) para disminuir la carga microbiana del producto, sin embargo, éste genera subproductos perjudiciales para la salud. Por esto, la necesidad de encontrar nuevas tecnologías emergentes y sostenibles como la radiación UV-C. El presente trabajo tuvo como objetivo evaluar el efecto de la aplicación de diferentes dosis de radiación UV-C sobre la calidad de brotes de alfalfa envasados en atmósfera modificad

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35

Gonzalez-Estrada, Tomas Augusto. "Inheritance and activity of the early auxin-responsive GH3 promoter and somatic embryogenesis in alfalfa (Medicago sativa L.)." Thesis, National Library of Canada = Bibliothèque nationale du Canada, 2000. http://www.collectionscanada.ca/obj/s4/f2/dsk1/tape2/PQDD_0015/NQ55625.pdf.

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36

Samis, Karen Elizabeth. "An analysis of alfalfa, Medicago sativa L., F¦1 families segregating for superoxide dismutase and alcohol dehydrogenase transgenes." Thesis, National Library of Canada = Bibliothèque nationale du Canada, 2000. http://www.collectionscanada.ca/obj/s4/f2/dsk1/tape2/PQDD_0016/MQ58375.pdf.

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37

Safarnejad, Abbas. "Improvement in salt and drought tolerance of alfalfa (Medicago sativa L.) using tissue culture and molecular genetic techniques." Thesis, University of Liverpool, 1996. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.307711.

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38

Grosjean, Catherine. "Aspects physiologiques, moléculaires et génétiques de la nodulation en l'absence de Rhizobium chez la luzerne (Medicago sativa L. )." Toulouse 3, 1997. http://www.theses.fr/1997TOU30176.

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En situation de carence azotee, les legumineuses etablissent une symbiose avec des bacteries du sol, les rhizobiacees, au sein d'organes racinaires specialises appeles nodules. L'organogenese nodulaire est declenchee par des signaux bacteriens, des lipo-chitooligosaccharides appeles facteurs nod. Neanmoins, certaines plantes de luzerne (medicago sativa l. ) sont capables de former spontanement des nodules, en l'absence de leur symbionte rhizobium meliloti. C'est le phenotype nar, pour nodulation en l'absence de rhizobium. Une etude detaillee de ce phenomene a ete entreprise afin de completer s

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39

Soussana, Jean-François. "Fixation symbiotique de l'azote et assimilation du nitrate chez la luzerne (Medicago sativa L. ) : aspects méthodologiques, aspects physiologiques." Montpellier 2, 1986. http://www.theses.fr/1986MON20048.

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Un modele **(15)n permettant de determiner la part de reduction du nitrate a ete mis au point. La technique in situ de mesure de l'activite de la nitrate reductase a ete comparee avec ce modele. Les resultats indiquent que la technique in situ fournit une bonne estimation de la vitesse reelle de reduction du nitrate dans les parties aeriennes de jeunes plantes de mais, d'orge, et de luzerne, mais sous-estime cette vitesse dans le cas des racines. Cette sous-estimation semble etre due chez la luzerne a la presence d'une activite nitrite reductase residuelle, et a la baisse de l'absorption du ni

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40

Birouk, Ahmed. "Les ressources phytogénétiques au Maroc : analyse de la variabilité génétique d'une espèce fourragère, la luzerne (Medicago sativa L.)." Paris 11, 1987. http://www.theses.fr/1987PA112377.

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La série de travaux présentés vise à dégager la structure de la diversité des populations traditionnelles de luzerne du Maroc et les implications qui en découlent en gestion des ressources génétiques de cette espèce. La première partie du mémoire relate les résultats des prospections réalistes A travers cinq régions ZIZ, DRA, DADES (Oasis présahariennes), Montagne et Demnate. La diversité interrégionale est caractérisée tant par les conditions édaphoclimatiques que par les conditions d'exploitation des luzernes. La seconde partie porte sur l'évaluation agronomique et l’analyse du polymorphisme

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41

Fresquet, Corrales Sandra. "Diseño y validación de herramientas biotecnológicas para la mejora del valor nutricional de la alfalfa (Medicago sativa L.)." Doctoral thesis, Universitat Politècnica de València, 2015. http://hdl.handle.net/10251/59240.

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[EN] Alfalfa (Medicago sativa L.), is a forage legume with a significant content of protein, being the most widely cultivated forage around the world. In this species, the protein content decreased during growth processes as well as other resources used by the plant during the flowering process. Alfalfa also contains a lower concentration of condensed tannins or proanthocyanidins (PAs), less than required to remedy the digestive disorder of ruminant livestock causing pasture bloat by production of greenhouse gases as result of the microbial fermentation and the excessive desamination of protei

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42

Soussana, Jean-François. "Fixation symbiotique de l'azote et assimilation du nitrate chez la Luzerne (Medicago sativa L.) aspects méthodologiques, aspects physiologiques /." Grenoble 2 : ANRT, 1986. http://catalogue.bnf.fr/ark:/12148/cb376013473.

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43

Birouk, Ahmed. "Les Ressources phytogénétiques au Maroc analyse de la variabilité génétique d'une espèce fourragère, la Luzerne (Medicago sativa L.) /." Grenoble 2 : ANRT, 1987. http://catalogue.bnf.fr/ark:/12148/cb37603026s.

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44

Robinson, P. S. "The role of Ca2+ as a second messenger in an inducible defence response in cells of Medicago sativa L." Thesis, Swansea University, 1994. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.638697.

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The role of Ca<SUP>2+</SUP> in the interaction between lucerne (<i>Medicago sativa</i> L.) and the wilt fungus, <i>Verticillium albo-atrum</i> R & B has been examined. Elicitor prepared from culture-filtrates of <i>V.albo-antrum</i> reduced the incorporation of <SUP>45</SUP>Ca<SUP>2+</SUP> into protoplasts of lucerne. Elicitor and extracellular Ca<SUP>2+</SUP> caused an efflux of <SUP>45</SUP>Ca<SUP>2+</SUP> from protoplasts preloaded with <SUP>45</SUP>Ca<SUP>2+</SUP>, the elicitor causing the increase in efflux through the activity of an orthovanadate sensitive pump. Antagonists of Ca<SUP>2+<

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45

Jenczewski, Eric. "Etude des populations naturelles en contact avec un compartiment cultive apparente. Le cas de medicago sativa l. En espagne." Montpellier, ENSA, 1998. http://www.theses.fr/1998ENSA0006.

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La conservation raisonnee des ressources genetiques necessite une bonne connaissance des forces evolutives qui controlent l'evolution de la variabilite genetique presente dans les populations des especes concernees. Le flux de genes emanant du compartiment cultive peut menacer l'originalite du patrimoine genetique propre aux populations sauvages apparentees, quand les deux compartiments coexistent en situation de parapatrie. Il est donc indispensable de pouvoir estimer l'ampleur de ce flux genique et d'identifier les mecanismes qui permettent, le cas echeant, d'en limiter l'impact (intensite e

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46

Delamarre, Francine. "Production de semences artificielles de luzerne (Medicago sativa L) : Contribution à l'étude des mécanismes de tolérance à la déshydratation." Compiègne, 1999. http://www.theses.fr/1999COMP1199.

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L'embryogenèse somatique a été initiée à partir d'hypocotyles issus de plusieurs variétés de luzerne. Une variabilité inter et intravariétale de la réponse embryogène a été observée. Le clone le plus embryogène (C125) a été retenu pour les études ultérieures. La multiplication des masses pro-embogènes a été réalisée (en milieu liquide ou servi-solide) pendant quatre mois, sans perte de potentiel embryogène. Les embryons placés en maturation sur un milieu contenant 20pM d'ABA et 1,6 % de gelrite, et déshydratés jusqu'à 80 % de teneur en eau, présentent 70 % de germination alors que seulement 3

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KIM, TAE-HWAN. "Mobilisation des reserves azotees et contribution del'azote du milieu a la repousse de medicago sativa l. Apres une coupe." Caen, 1992. http://www.theses.fr/1992CAEN2052.

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Les effets d'une coupe des parties aeriennes sur le metabolisme azote de medicago sativa l. , cv europe sont etudies. Un marquage de chasse #1#5n prealablement a la coupe permet d'estimer l'origine de l'azote des organes en repousse en precisant la contribution de l'azote endogene (reserves) et exogene (n preleve dans le milieu ou n#2 atmospherique). La coupe modifie les relations source/puits pour l'azote de reserve. Durant les 10 premiers jours de repousse, l'essentiel de l'azote de l'appareil aerien provient de la mobilisation des reserves azotees stockees essentiellement dans les racines l

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48

Ranger, Christopher M. "The chemical mechanism for defense of glandular-haired alfalfa, Medicago sativa L., against the potato leafhopper, Empoasca fabae (Harris) /." free to MU campus, to others for purchase, 2004. http://wwwlib.umi.com/cr/mo/fullcit?p3137739.

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49

Absher, Karen Lynne. "Nitrogen utilization in tall fescue (Festuca arundinacea Schreb.) pastures fertilized with nitrogen or grown with alfalfa (Medicago sativa L.) or red clover (Trifolium pratense L.)." Thesis, Virginia Tech, 1989. http://hdl.handle.net/10919/44100.

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<p>Use of legumes as an alternative to nitrogen (N) fertilization in pasture management improves forage quality and animal performance and has been suggested to reduce the potential for environmental pollution. "Kentucky 3l" tall fescue fertilized with 160 kg N ha-1 yr-1 (split application) was compared to tall fescue grown with alfalfa or red clover in a 5-yr pasture experiment on a mixed Typic Hapludult. During yr 6, effects of N fertilization or the legume on soil N, forage N concentration, yield, botanical composition, N intake by esophageally fistulated steers grazing the pastures

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Brookes, Brenda S. (Brenda Sylvia). "Pollination studies in alfalfa, Medicago Sativa L. (Leguminosae), with special reference to the alfalfa leafcutter bee, Megachile Rotundata (F.) (Apoidea)." Ottawa, 1992.

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