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Tesi sul tema "Germination"

Autore: Grafiati
Pubblicato: 4 giugno 2021
Ultima modifica: 25 luglio 2025

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1

Tranbarger, Timothy John. "Isolation and regulation of genes expressed during Douglas-fir germination and post-germination." Thesis, National Library of Canada = Bibliothèque nationale du Canada, 1999. http://www.collectionscanada.ca/obj/s4/f2/dsk2/ftp02/NQ37366.pdf.

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2

Zaman, S., S. Padmesh, and H. Tawfiq. "Effect of Pre-germination Treatments on Seed Germination of Helianthemum lippii (L.) Dum.Cours." University of Arizona (Tucson, AZ), 2009. http://hdl.handle.net/10150/556666.

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Abstract (sommario):
Helianthemum lippii (L.) Dum. Cours. is a perennial shrubby plant 10-45 cm tall that belongs to the family Cistaceae. The effects of pretreatments on germination of Helianthemum lippii provide information regarding germination requirements of this species, which could be used for conservation studies. Five different pretreatment were applied to enhance seed germination. Scarification followed by germination at 6 different constant temperatures (10, 15, 20, 25, 30 and 35°C) with continuous light or dark, Scarification followed by GA3 soaking (100, 250,500,750 and 1000 ppm), Heat and moist strat
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3

Omami, Elizabeth Nabwile. "Amaranthus retroflexus seed dormancy and germination responses to environmental factors and chemical stimulants /." [S.l. : s.n.], 1993. http://library.uws.edu.au/adt-NUWS/public/adt-NUWS20030603.091907/index.html.

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4

Elliott, Katherine Anne. "Barley germination and associated metabolism." Thesis, Heriot-Watt University, 1996. http://hdl.handle.net/10399/713.

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5

Liu, Bing. "Germination studies in terrestrial orchids." Thesis, University of Leeds, 1991. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.303461.

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6

Hampstead, Anthony. "Mathematical approaches to seed germination." Thesis, University of Nottingham, 2014. http://eprints.nottingham.ac.uk/13979/.

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Abstract (sommario):
Plant seeds progress through specific stages during germination, from quiescence in the dry state through water uptake, testa rupture and finally endosperm rupture. The stages of seed germination are fairly well classified but the underlying biochemical and mechanical processes are unknown. The ability to control a seeds progression through the stages of germination has implications on farming efficiency and so the following thesis explores Arabidopsis thaliana and Lepidium sativum seeds during the germination process. A systematic approach to analysing the shape of cells within the radicle (e
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7

Hayer, Kimran. "Germination of Aspergillus niger conidia." Thesis, University of Nottingham, 2014. http://eprints.nottingham.ac.uk/14292/.

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Abstract (sommario):
Aspergillus niger is a black-spored filamentous fungus that forms asexual spores called conidospores (‘conidia’). Germination of conidia, leading to the formation of hyphae, is initiated by conidial swelling and mobilisation of endogenous carbon and energy stores, followed by polarisation and emergence of a hyphal germ tube. These morphological and biochemical changes which define the model of germination have been studied with the aim of understanding how conidia sense and utilise different soluble carbon sources for germination. Microscopy and flow cytometry were used to track the morphologi
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8

Foster, S. J. "Biochemistry of Bacillus megaterium spore germination." Thesis, University of Cambridge, 1986. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.384466.

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9

Araujo, Diego Kitahara. "Extratos de Ascophyllum nodosum no tratamento de sementes de milho e soja: avaliações fisiológicas e moleculares." Universidade de São Paulo, 2016. http://www.teses.usp.br/teses/disponiveis/11/11144/tde-07062016-155617/.

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Abstract (sommario):
A obtenção de uma lavoura com população adequada de plantas depende da utilização de diferentes práticas agronômicas, estando o sucesso condicionado ao uso de sementes de boa qualidade. No entanto, a semeadura dificilmente é realizada em condições ideais o que resulta em problemas na emergência das plantas. Grande é a procura por alternativas que melhorem a germinação e o desenvolvimento inicial dos cultivos resultando em uniformidade de emergência, garantindo o estande e culminando em produção. O tratamento de sementes com agroquímicos fitossanitários é uma solução parcial no combate de agent
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10

Jayaraman, Padmavathy. "Analysis of Bacillus subtilis 1604 spore germination." Thesis, University of Cambridge, 1989. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.317752.

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11

Ma, Liuyin. "THE ROLE OF POLYADENYLATION IN SEED GERMINATION." UKnowledge, 2013. http://uknowledge.uky.edu/pss_etds/47.

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Seed germination has many impacts on the uses of seeds, and is an important subject for study. Seed germination is regulated at both transcriptional and post-transcriptional levels. Therefore, it is important to study how polyadenylation regulates gene expression during seed germination. To this end, a modified Illumina GAIIx sequencing protocol (described in Chapter Two) was developed that allows deep coverage of poly(A) site position and distribution. Alternative polyadenylation (APA) regulates gene expression by choosing one potential poly(A) site on a precursor RNA consequentially shorteni
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12

Mansfield, Stephen Gary. "Embryogenesis and germination in Arabidopsis thaliana L." Thesis, University of Nottingham, 1989. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.253657.

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13

Homer, Karen Ann. "Anthranilate and conidial germination in colletotrichum musae." Thesis, University of Newcastle Upon Tyne, 1990. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.315600.

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14

Dobrenz, Albert, David Robinson, and Steve Smith. "Improving the Germination Salt Tolerance of Alfalfa." College of Agriculture, University of Arizona (Tucson, AZ), 1986. http://hdl.handle.net/10150/200482.

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The development of alfalfa that can germinate at extremely high NaC1 levels will improve early emergence and establishment of this important forage crop in saline soils. We have identified plants in the eighth cycle of selection that germinated at -3.0 MPa (30,000 ppm). Seed from these plants displayed a 40% better germination at -2.1 MPa (21,000 ppm) than the previous cycle. Germination at higher salt concentrations were not different between the two germplasm sources.
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15

McKimmie, Tim, and Albert Dobrenz. "Alfalfa Salt Tolerance from Germination to Establishment." College of Agriculture, University of Arizona (Tucson, AZ), 1986. http://hdl.handle.net/10150/200538.

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16

Paul, Nancy Elizabeth 1960. "EFFECTS OF PARENT PLANT NUTRITION AND TIME OF HARVEST ON GERMINATION CHARACTERISTICS OF TWO GRASS SPECIES (GERMINATION RATE, FERTILITY)." Thesis, The University of Arizona, 1986. http://hdl.handle.net/10150/276992.

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17

Xia, Qiong. "Molecular aspects of temperature regulation of sunflower seed dormancy." Thesis, Paris 6, 2016. http://www.theses.fr/2016PA066629/document.

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La graine est le produit de la reproduction sexuée chez les Angiospermes. Elle assure la survie et la dispersion de l'espèce. La germination des graines est la première étape de la croissance des plantes. La transition entre l'état de dormance des graines et leur germination est une étape clef dans le cycle de vie des plantes qui a des conséquences écologique et commerciale. Depuis plusieurs décennies, de nombreux facteurs de l'environnement ont été étudiés pour leurs implications et leurs conséquences dans le processus de dormance et de germination des graines. Les études sur la réponse des s
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18

Soltani, Ali. "Improvement of seed germination of Fagus orientalis Lipsky /." Umeå : Dept. of Silviculture, Swedish Univ. of Agricultural Sciences, 2003. http://epsilon.slu.se/s275.pdf.

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19

Heeg, Daniela. "Spore formation and spore germination of Clostridium difficile." Thesis, University of Nottingham, 2013. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.594825.

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Abstract (sommario):
Clostridium difficile is the major underlying cause of antibiotic-associated diarrhoea and poses a risk for healthcare systems worldwide. Endospores produced during sporulation are widely regarded to be the infectious agent of C. difficile associated diarrhoea. These spores are able to withstand a variety of antimicrobial agents and industrial cleaning products and are therefore able to reside on surfaces in healthcare settings for prolonged periods of lime. In order to cause disease in susceptible individuals, spores need to abjure dormancy and return to vegetative cell growth through germina
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20

Johnson, Christian Lloyd. "Proteins involved in the germination of bacillus spores." Thesis, University of Sheffield, 2005. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.425623.

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21

Siegel, Richard S., and John H. Brock. "Germination Requirements of Key Southwestern Woody Riparian Species." University of Arizona (Tucson, AZ), 1990. http://hdl.handle.net/10150/609112.

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Abstract (sommario):
Germination requirements of selected Southwestern woody riparian species were studied in the laboratory. Four common tree species selected for study were Fremont Cottonwood (Populus fremontii), Goodding Willow (Salix gooddingii), Arizona Sycamore (Platanus wrightii) and Velvet Mesquite (Prosopis velutina). Seeds were collected from two major riparian habitats in the southwest. The species tested required a temperature range of 16° C to 27° C for germination. Fremont Cottonwood, Goodding Willow and Velvet Mesquite showed good germination at moisture stress levels of -4 bars or less, whereas Ari
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22

Sumugat, Mae Rose S. "Glutathione Dynamics in Arabidopsis Seed Development and Germination." Thesis, Virginia Tech, 2004. http://hdl.handle.net/10919/36420.

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Seed desiccation and germination have great potential for oxidative stress. Glutathione, one of the most abundant antioxidants in plant cells, is a crucial to the plant's defense mechanisms. To better understand glutathione's responses during these two stages, we examined its dynamics in wildtype Arabidopsis seeds and in a transgenic line containing an antisense glutathione reductase2 (anGR2) cDNA insert. Seeds from the two genotypes were compared morphologically. Glutathione levels in maturing and germinating seeds were measured by HPLC, and GR activity by native PAGE. Cytosolic glutathione w
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23

Leonard, Jenny. "Germination success and drought response in Erica coccinea." Master's thesis, University of Cape Town, 2015. http://hdl.handle.net/11427/15559.

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Resprouters and seeders are two common phenotypes found in fire-prone ecosystems. Although the distribution of the two forms is usually attributed to fire frequency, it has been proposed that the distribution of resprouter and seeder Erica in the Cape Floristic Region (CFR) of South Africa is determined more by water availability. Erica seeders are predicted to withstand the mild droughts of the southwest CFR better than Erica resprouters, which would account for the abundance of seeders in this region. This thesis tested the assumptions that 1) seeders germinate more quickly and successfully
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24

Kyereh, Boateng. "Seed phenology and germination of Ghanaian forest trees." Thesis, University of Aberdeen, 1994. http://digitool.abdn.ac.uk/R?func=search-advanced-go&find_code1=WSN&request1=AAIU068828.

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Seed production and germination of some timber tree species were studied in Ghana for possible prediction of seed yield and natural regeneration. Seed phenology in 13 species was monitored for two years, using permanent seed traps in two forest sites. Seed germination tests were conducted in neutral, green shade and dark in shade houses for 20 species. In the forest, germination was tested in forest gaps receiving different irradiances. Fruiting frequency ranged from twice in each year to supra-annual fruiting. Fruiting periods for species were consistent between years. Fruiting synchrony was
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25

Muthui, Wangechi. "Changes in muskmelon perisperm envelope tissue during germination." Thesis, This resource online, 1993. http://scholar.lib.vt.edu/theses/available/etd-06302009-040400/.

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26

St, Hilaire Rolston. "Seed Coat Treatments Influence Germination of Taxodium mucronatum." University of Arizona (Tucson, AZ), 2015. http://hdl.handle.net/10150/554341.

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The range of Taxodium mucronatum Ten. (Mexican bald cypress) is declining rapidly, yet relatively little is known about the propagation of this valuable ornamental tree. The objective of this study was to determine whether seed coat treatments could enhance the germination of Mexican bald cypress. Seeds of Mexican bald cypress were collected from Las Cruces and the Gila National Forest, New Mexico. In one experiment, seed coats were knicked or left intact, then germinated on moist filter paper or flooded with water. In another experiment, seed coats from the Las Cruces provenance were treated
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27

McKimmie, T., and A. K. Dobrenz. "Developing Salt Tolerant Alfalfa Beyond the Germination Stage." College of Agriculture, University of Arizona (Tucson, AZ), 1985. http://hdl.handle.net/10150/200494.

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28

Kobriger, J., N. Oebker, N. Simons, and D. Wager. "Germination of Several Pepper Cultivars at High Temperatures." College of Agriculture, University of Arizona (Tucson, AZ), 1986. http://hdl.handle.net/10150/214129.

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29

Kobriger, J., N. Oebker, N. Simons, and D. Wager. "Germination of Several Tomato Cultivars at High Temperatures." College of Agriculture, University of Arizona (Tucson, AZ), 1986. http://hdl.handle.net/10150/214130.

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30

Ralowicz, A. E., C. F. Mancino, and D. M. Kopec. "Variation in Flowering and Germination in Hilaria belangeri." College of Agriculture, University of Arizona (Tucson, AZ), 1988. http://hdl.handle.net/10150/215831.

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31

TUDELA, ISANTA MARIA. "A comparative germination study among different alpine habitats." Doctoral thesis, Università degli studi di Pavia, 2017. http://hdl.handle.net/11571/1214891.

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If species inhabit in a specific habitat two conditions should be befallen: first seeds must be present through dispersal or in the soil seed bank and secondly, conditions for germination must occurred. If suitable germination niche is not met, germination will not occur and, consequently, species will not be present. In an alpine context, the large species and microhabitats pool found have resulted in a variety of germination and dormancy patterns, which make it difficult to define a common alpine germination niche or behaviour. Therefore, to better understand germination ecology in alpine en
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32

Gaudreault, Mélanie. "Amorçage et séparation des graines d'épinette noire (Picea mariana (Mill.) B.S.P.) : amélioration de la germination des lots de semences forestières /." Thèse, Chicoutimi : Université du Québec à Chicoutimi, 2005. http://theses.uqac.ca.

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33

Nadeem, Muhammad. "Remobilization of seed phosphorus reserves and exogenous phosphorus uptake during germination and early growth stages of maize (Zea mays L.)." Thesis, Bordeaux 1, 2011. http://www.theses.fr/2011BOR14439/document.

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Le phosphore (P) est un élément indispensable pour la croissance des plantes. De nombreux travaux montrent des réponses très précoces à une limitation de la disponibilité en P. Pendant la germination et la croissance juvénile, la demande en P des plantules peut être satisfaite par la remobilisation des réserves en P des graines et le prélèvement racinaire. Les objectifs de la thèse sont d’étudier la contribution respective de la remobilisation des réserves en P des graines et du prélèvement racinaire de P à l’alimentation en P des plantules de maïs, et les interactions entre ces deux processus
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34

Bond, Alison Marguerite. "Germination ecology of Carex (Cyperaceae) : effects of light, stratification, and soil moisture." Thesis, McGill University, 1999. http://digitool.Library.McGill.CA:80/R/?func=dbin-jump-full&object_id=21514.

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Congeneric species occupying different habitats might be expected to have different seed dormancy strategies and germination requirements while those growing in the same habitats may be more similar. I tested this hypothesis with a broad survey of the germination of 51 Carex species from mesic deciduous forests, wet deciduous forests, and wetland or seasonally flooded areas in response to different controlled environmental conditions. A canonical discriminant analysis based on the responses of 29 species to various treatments showed clear differences among seeds from each habitat with respect
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35

Burnett, Edward Charles. "Development of a non-targeted transposon mutagenesis system in Nicotiana plumbaginifolia." Thesis, University of Nottingham, 1996. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.339676.

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36

Seyedhosseini, S. H. "Ion implantation of seeds." Thesis, University of Salford, 1992. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.358378.

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37

Mirdad, Zohair M. "The evaluation and improvement of seed quality and storage potential in cauliflower and cabbage seeds." Thesis, University of Aberdeen, 2003. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.288381.

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This study aimed to improve seed quality in cauliflower and cabbage, firstly though the development of rapid methods for the evaluation of germination and seed storage potential using measurements of seed leachates conductivity and secondly, through the application of seed treatments both as pre-storage treatments and to improve germination under stress conditions.  Significant negative correlations between germination and the conductivity of seed leachate were observed both when seed had high germinations after ageing and when a range of germinations resulted from either combinations of dead
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38

Wills, Sarah L. "Regulation of storage reserve mobilisation in Arabidopsis." Thesis, University of York, 2002. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.274482.

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39

Willmott, Ruth Louise. "#alpha#-amylase genes of Avena fatua." Thesis, University of Bristol, 1994. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.238827.

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40

Stone, Marlon C. "Understanding the role of gibberellin in the developmental physiology of wheat using a transgenic approach." Thesis, University of Bristol, 2003. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.274613.

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41

Pierre, Johann. "Combinaison d’approches transcriptomique et écophysiologique pour l’analyse de la croissance hétérotrophe de Medicago truncatula à basse température." Rennes, Agrocampus Ouest, 2012. http://www.theses.fr/2012NSARI065.

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Le froid est un facteur environnemental majeur affectant les processus de germination et de croissance hétérotrophe. Nous avons étudié la croissance hétérotrophe de l’hypocotyle de la plantule de Medicago truncatula, organe portant la plantule hors de terre, et dont la croissance est fortement impactée par des basses températures. Une analyse transcriptomique combinée à une analyse des bases cellulaires de la croissance de l’hypocotyle a été menée, pour deux génotypes aux croissances contrastées, à l’obscurité à 20°C et à 10°C. L’analyse des variations du transcriptome menée sans a priori révè
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42

Sheikh, Saghir Ahmad. "Effects of temperature and waterlogging on cotton seedlings roots." Thesis, Bangor University, 1994. https://research.bangor.ac.uk/portal/en/theses/effects-of-temperature-and-waterlogging-on-cotton-seedlings-roots(b6b7873d-5a4e-4cbb-8c2d-9218101544a9).html.

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Experiments were carried out to study changes in the physiological and biochemical properties of cotton seedling roots with respect to high temperature and waterlogging treatments. It to clear from these, studies that both high temperature and waterlogging significantly damaged the seedling roots and affected their physiological and biochemical activities. Cultivars showed no effect an their root growth for heat stresses up to 30'C but were adversely affected when stressed above this temperature. Cultivar MIN-93 performed well up to about 38'C, while Qalandari showed an inhibition at temperatu
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43

Gelormini, Christophe. "Optimisation des propriétés germinatives des graines de colza par initialisation : aspects méthodologiques et fondamentaux." Rennes 1, 1995. http://www.theses.fr/1995REN10101.

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Une etude est realisee sur plusieurs lots de graines de differentes varietes commerciales de colza (brassica napus l. ) dans le but d'ameliorer par differents traitements leur vigueur germinative. Les tests de germination realises en conditions standards ne permettent pas de reveler cette vigueur. Differentes epreuves penalisantes appliquees avant ou pendant la germination des graines donnent acces a leurs reelles qualites germinatives. La germination realisee a temperature infra-optimale ou le vieillissement accelere des graines permettent de discriminer entre les differents lots, que ceux-ci
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44

Nanguy, Sidje Paule Marina. "Influence de l'état physiologique sur la germination de spores appartenant aux genres Aspergillus et Penicillium." Thesis, Dijon, 2011. http://www.theses.fr/2011DIJOS016.

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Les spores ou les conidies fongiques sont responsables de la dissémination des champignons filamenteux dans l'environnement (air, eau, sol,…). Ensuite les spores fongiques peuvent se déposer sur les équipements dans les ateliers de fabrication, sur les matières premières agricoles et sur les aliments. Au laboratoire, les spores sont obtenues en cultivant les champignons filamenteux en conditions optimales en termes de température, activité de l'eau, nutriments, de manière à obtenir le matériel biologique le plus rapidement possible. Or naturellement, lors de la sporulation, les champignons son
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45

Nolan, Daryl Guy. "Seed germination characteristics of Centaurea diffusa and C. Maculosa." Thesis, University of British Columbia, 1989. http://hdl.handle.net/2429/27605.

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The problematic reinfestation of chemically-treated sites by diffuse and spotted knapweed {Centaurea diffusa and C. maculosa) is thought to occur from dormant seeds in the soil. This study confirmed that reserves of dormant seeds are present in the soil of infested sites, although greater numbers of seeds were recovered from senesced plants. Knapweed plants produce both non-dormant and dormant seeds (germination polymorphism), the relative proportions of which vary between individual plants within a site, as well as between bulk samples collected from different sites. Two types of dormant seed
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46

Bloomberg, Mark. "Modelling germination and early seedling growth of radiata pine." Lincoln University, 2008. http://hdl.handle.net/10182/681.

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Background: This study seeks to model aspects of the regeneration of radiata pine (Pinus radiata D.Don) seedlings under a range of environmental conditions. This study investigated whether “hybrid” mechanistic models, which predict plant growth and development using empirical representations of plant physiological responses to the environment, could provide a realistic alternative to conventional empirical regeneration models. Objectives: The objectives of this study were to 1) identify the functional relationships between the environmental conditions controlling germination, establishmen
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47

Jorge, Marcal Henrique Amici. "GERMINATION AND CHARACTERIZATION OF GUAYULE (Parthenium argentatum GRAY) SEED." Diss., Tucson, Arizona : University of Arizona, 2005. http://etd.library.arizona.edu/etd/GetFileServlet?file=file:///data1/pdf/etd/azu%5Fetd%5F1247%5F1%5Fm.pdf&type=application/pdf.

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48

Roig, Yann. "Microfluidique supercritique : réactivité chimique et germination - croissance de nanocristaux." Phd thesis, Université Sciences et Technologies - Bordeaux I, 2012. http://tel.archives-ouvertes.fr/tel-00758340.

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Les propriétés spécifiques des milieux fluides supercritiques sont exploitées depuis denombreuses années dans les domaines de la séparation, de la chimie et des matériaux.Aujourd'hui, les activités de recherche se focalisent vers une meilleure compréhension et unmeilleur contrôle des processus thermodynamiques, physiques et chimiques mis en jeu, ce quinous a naturellement amené à développer la microfluidique supercritique. C'est dans cecontexte que s'inscrivent ces travaux de thèse ayant pour objet le développement et l'utilisationde l'outil microfluidique pour l'étude de la réactivité chimiqu
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49

Cutting, S. M. "Genetics and properties of germination mutants of Bacillus subtilis." Thesis, University of Oxford, 1986. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.375228.

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Burns, David Alexander. "Analysis of the spore germination mechanisms of Clostridium difficile." Thesis, University of Nottingham, 2011. http://eprints.nottingham.ac.uk/11852/.

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Abstract (sommario):
Clostridium difficile is the leading cause of hospital acquired diarrhoea and a major burden to healthcare services worldwide. Endospore production plays a pivotal role in infection and disease transmission, but in order to cause disease these spores must germinate and return to vegetative cell growth. Therefore, knowledge of spore germination is important and may have direct applications in future disease prevention. Germination has been well studied in Bacillus and in some clostridia, but the mechanisms of C. difficile spore germination remain unclear. Apparent homologues of genes important
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