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Artykuły w czasopismach na temat "Bourgeon axillaire"
Médard, R., Y. Sell i P. Barnola. "Le développement du bourgeon axillaire du Manihot esculenta". Canadian Journal of Botany 70, nr 10 (1.10.1992): 2041–52. http://dx.doi.org/10.1139/b92-254.
Pełny tekst źródłaMédard, R. "Détermination de l'ébauche foliaire, du bourgeon axillaire et de l'entre-noeud chez le Manihot esculenta : étude microchirurgicale". Canadian Journal of Botany 72, nr 9 (1.09.1994): 1329–42. http://dx.doi.org/10.1139/b94-163.
Pełny tekst źródłaOueida, Ahmed Fathi, i Marie-Odile Desbiez. "Influence de la qualité de l'éclairement sur les corrélations entre le cotylédon et son bourgeon axillaire chez le Linum usitatissimum". Canadian Journal of Botany 70, nr 5 (1.05.1992): 1087–92. http://dx.doi.org/10.1139/b92-133.
Pełny tekst źródłaYoumbi, Emmanuel, i Dieudonné Ngaha. "Expressionin vitrodes capacités organogènes des bourgeons axillaires chez le bananier plantain (Musaspp.)". Fruits 59, nr 4 (lipiec 2004): 241–48. http://dx.doi.org/10.1051/fruits:2004022.
Pełny tekst źródłaBouguedoura, Nadia, Nicole Michaux-Ferrière i Jean-Louis Bompar. "Comportement in vitro de bourgeons axillaires de type indéterminé du palmier dattier (Phoenix dactylifera)". Canadian Journal of Botany 68, nr 9 (1.09.1990): 2004–9. http://dx.doi.org/10.1139/b90-262.
Pełny tekst źródłaYoumbi, Emmanuel, i Abdelatif Benbadis. "Régénérationin vitrode plants à partir des bourgeons axillaires et de l'apex de plantules sexuées deDacryodes edulis(Don) Lam." Fruits 56, nr 5 (wrzesień 2001): 333–43. http://dx.doi.org/10.1051/fruits:2001134.
Pełny tekst źródłaYoumbi, Emmanuel, Nanga Jean Philipps Fonkam, Dieudonné Ngaha, Michel Ndoumbé Nkeng i Moïse Kwa. "Comportement de vitroplants de bananiers plantains issus de bourgeons axillaires et apicaux au cours de l’acclimatation et en champ". Fruits 60, nr 2 (marzec 2005): 91–100. http://dx.doi.org/10.1051/fruits:2005019.
Pełny tekst źródłaJemmali, Ahmed, Nedra Elloumi i Claire Kevers. "Comportement végétatif et génératif de plants de Fraisier (FragariaxananassaDuch.) issus de la régénérationin vitroà partir de bourgeons axillaires ou stipulaires". Acta Botanica Gallica 149, nr 4 (styczeń 2002): 395–404. http://dx.doi.org/10.1080/12538078.2002.10515971.
Pełny tekst źródłaIritani, Cecília, Flávio Zanette i Jovita Cinslinki. "Aspectos anatômicos da cultura in vitro da Araucaria angustifolia. I. Organização". Acta Biológica Paranaense 21 (31.12.1992). http://dx.doi.org/10.5380/abpr.v21i0.741.
Pełny tekst źródłaRozprawy doktorskie na temat "Bourgeon axillaire"
Dehlouz, Kilian. "Quels sont les acteurs moléculaires influençant le devenir et la différenciation du bourgeon axillaire de fraisier en stolon ou en branche pouvant se terminer par une inflorescence ?" Electronic Thesis or Diss., Bordeaux, 2024. http://www.theses.fr/2024BORD0310.
Pełny tekst źródłaStrawberries reproduce both sexually (flowering) and asexually (stolons). These two methods, although antagonistic, are agronomically important: flowering influences fruit yield, while stolons enable the propagation of varieties. This competition takes place in particular at the level of axillary buds (AxB), which develop either into branches that can end in an inflorescence, or into stolons. Understanding the genetic network controlling AxB development is crucial, as it affects both fruit and plant yield in strawberry.The aim of my thesis is to elucidate the molecular mechanisms involved in the balance between sexual and asexual reproduction in diploid strawberry through three main questions:1. What are the molecular actors involved in the development of axillary buds into stolons or branches? A comparative transcriptomics approach on morphologically undifferentiated AxB has enabled us to identify biological processes and a shortlist of genes potentially involved in this balance.2. What are the molecular actors involved in the differentiation of AxB into stolons or branches, and can we associate a molecular signature of AxB according to differentiation stage and fate? Comparative and predictive transcriptomic analyses of AxB taken from different genotypes, at different stages of development and in different positions on the plant, have revealed key players and signature genes for AxB fate and differentiation status.3. Do changes in the expression of candidate genes alter the balance between sexual and asexual reproduction? Genome-editing approaches via CRISPR were used on two genes of interest to assess the impact of loss-of-function of these genes on the balance between sexual and asexual reproduction.This thesis enabled us to complete the regulatory network that controls AxB fate and differentiation, and thus the balance between sexual and asexual reproduction in strawberry, and to highlight potential targets for the improvement of cultivated strawberry
Wang, Ming. "Réseau de régulation moléculaire de l'expression du gène BRANCHED1 (BRC1) dans le bourgeon axillaire du rosier, en réponse au sucre et à l'auxine". Thesis, Rennes, Agrocampus Ouest, 2019. http://www.theses.fr/2019NSARC140.
Pełny tekst źródłaBud outgrowth is a key process for plant development, which is controlled by endogenous and exogenous cues. At the bud level, the transcription factor BRANCHED1 (BRC1) is one of the main hub for the signaling pathways of these factors. Based on previous studies, the transcription level of RhBRC1 (a homologous BRC1 gene in Rosa hybrida) is controlled by sugar and auxin. However, the molecular mechanisms involved in this regulation remain unknown. Here, we have shown that the antagonistic effect of sucrose and auxin can influence the transcription level of several sugar metabolism— related enzymes, including glycolysis / TCA cycle and oxidative pathway of pentose phosphates (OPPP). This regulation of sugar metabolism has been shown to be central in their antagonistic effect on both RhBRC1 expression and bud growthIndeed, glycolysis/TCA cycle and OPPP promote budoutgrowth and have a negative effect on the transcription of RhBRC1. In addition, the promoter sequence of RhBRC1 is the convergence site of the antagonistic effect of auxin and sugar, mediated by glycolysis / TCA cycle and OPPP. Two regions of RhBRC1 promoter have been identified for their involvement in this transcriptional regulation. On the other hand, this antagonistic effect of auxin and sugar also involves a post-transcriptional regulation of RhBRC1 through its 3'UTR sequence. À PUF protein, RhPUF4, has been identified and the results suggest its potential ability to bind to the 3'UTR of RhBRC1 and to regulate its expression. In conclusion, the antagonistic effect of auxin and sugar, two major factors controlling shoot branching, is mediated by glycolysis and OPPP-emanating signals and involves transcriptional and post-transcriptional regulation of RhBRC1
Raposo, Nadia. "Dormance et débourrement des bourgeons de peuplier (Populus trichocarpa x Populus deltoi͏̈des cv Raspalje) : variations glucidiques et protéiques dans les différentes parties du bourgeon axillaire et dans la zone d'insertion sur la tige-mère, possibilités d'échanges entre ces différentes parties". Grenoble 1, 1989. http://www.theses.fr/1989GRE10107.
Pełny tekst źródłaSchmitz, Juliano. "Architecture de la pousse de pommier en réponse à des températures hivernales froides et douces : typologie de la ramification axillaire au printemps et relation avec le statut hydrique du bourgeon pendant l'hiver précédent". Thesis, Montpellier, SupAgro, 2014. http://www.theses.fr/2014NSAM0040/document.
Pełny tekst źródłaThe apple tree (Malus Xdomestica Borkh.) presents morphological and physiological anomalies when grown in mild winter climates with insufficient winter chilling to overcome winter dormancy. Symptoms are typically delayed and erratic budburst, entailing desynchronized flowering and fruit-set and poor agronomic performances. This thesis aimed at gaining more insights on the following issues. Firstly, what are the effects of winter temperatures on axillary burdburst and bud outgrowth, and what are the respective effects of winter temperatures and cultivar?, and secondly, is there a link between the temperature-dependent budburst and bud water status? Works were done in France and Brazil. In France, experiments were carried out in controlled conditions on four apple cultivars characterized by either high chilling (‘Granny Smith', ‘Royal Gala', ‘Starkrimson') or low chilling (‘Condessa') requirements and were submitted to outdoor-cold and greenhouse-mild winter temperatures. We showed that the actual shoot architecture and budburst resulted from an ordered sequence of events with a pivotal role of winter temperatures on the dormancy completion of individual lateral buds. Endogenous factors related to the cultivar branching pattern overtook the temperature effect on the lateral bud outgrowth. Furthermore, the delayed senescence and subsequent leaf persistence during winter, characterizing the apple tree in the mild winter temperature conditions, had only a weak effect on the topological distribution of budburst and lateral outgrowth. The analyses of bud water status were done on distal buds only, characterized by high budburst frequency in cold winter conditions. We showed that, from endodormancy to the pre-budburst stage, xylem conductance at the stem-to-bud junction did not show consistent changes across cultivars and winter temperature treatments. Bud water potential had negative values, between -4.35 and -2.24 MPa, depending on cultivars and winter temperature treatments. Moreover, whatever the cultivar, there were no significant trends across dates for the effects of winter temperatures on bud water potential and relative water content without a consistent relationship with actual spring budburst frequency. These results suggested that lateral buds were hydraulically isolated from the parent stem during winter until a few days before budburst. The other set of experiments was carried out in Brazil, under mild winter conditions, on the low chilling apple cultivar ‘Eva'. The objectives were to gain more insights on the effect of the position of the over-wintering lateral bud along the whole-parent shoot on bud size and water content. Results highlighted that distal buds were larger and had a higher water content than proximal buds with a strong increase of water content a week before spring budburst. It was concluded that the acrotonic pattern of budburst was mainly established during ecodormancy. As a whole, we showed that spring budburst seemed more related to a whole-shoot effect than to the water status of the individual bud during winter dormancy. Our study substantiated the importance of the whole shoot as an integrated morphological and physiological unit in driving budburst and further growth
Bouderrah, Mohamed. "Comparaison de deux modes de vitropropagation à partir de vitrosemis d'eucalyptus camaldulensis provenance lake albacutya : Micropropagation à partir de bourgeons axillaires, micropropagation à partir de bourgeons adventifs, et étude de la variabilité". Nancy 1, 1988. http://www.theses.fr/1988NAN10002.
Pełny tekst źródłaProust, Hélène. "Evolution de la fonction des strigolactones chez les plantes terrestres : étude chez Physcomitrella patens". Paris 11, 2010. http://www.theses.fr/2010PA112276.
Pełny tekst źródłaStrigolactones are a novel class of plant hormones wich possess two fundamental functions, they controlling shoot branching and promoting root symbiotic and parasitic interactions. Ln Pea, to genes RMS1 and RMS5 encoding two CAROTENOID CLEAVAGE DIOSYGENASES proteins, respectively CCD8 and CCD7 are involved in the biosynthesis of strigolactones. PpCCD8 and PpCCD7 have been identified in the genome of Physcomitrella patens. Physcomitrella patens is a non vascular plant belong to the group of bryophytes, first group of land plants. To gain a better understanding of the evolution of the function of strigolactones in land plants, we investigated whether strigolactones are produced in the moss Physcomitrella patens and what roles they play in a non vascular plant. Here we show that in P. Patens, wild type colonies released strigolactones or derived molecules into the medium to control branching of filaments and colony extension. Our results show that strigolactones possess two fundamental function in Physcomitrella, developmental function with filament branching inhibition, and ecophysiological function permitting the communication between colonies, reminiscent the "factor H" knew in Bryophytes. Strigolactones, exudated in the medium, repress the extension of neighbouring colonies in response of the density. We propose that in Physcomitrella patens strigolactones are reminiscent of quorum-sensing molecules used by bacteria to communicate with one another. Studies have been started to determine the link structure/activities in response of strigolactones in Physcomitrella patens
Le, Bris Manuel. "Etude des potentialités physiologiques des bourgeons axillaires le long de la tige de Rosa hybrida L. : rôle d'un inhibiteur, l'acide abscissique". Nice, 1999. http://www.theses.fr/1999NICE5272.
Pełny tekst źródłaBouderrah, Mohamed. "Comparaison de deux modes de vitropropagation à partir de vitrosemis d'Eucalyptus camaldulensis provenance Lake Albacutya micropropagation à partir de bourgeons axillaires : micropropagation à partir de bourgeons adventifs, et étude de la variabilité du comportement de différents clones /". Grenoble 2 : ANRT, 1988. http://catalogue.bnf.fr/ark:/12148/cb37612134n.
Pełny tekst źródłaChaouch, Boussaidi Fatma-Zohra. "Essais d'établissement de culture de tissus organogènes à partir de vitroplants et d'embryons zygotiques de chêne pédonculé (quercus robur l. )". Nancy 1, 1989. http://www.theses.fr/1989NAN10395.
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