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A hybrid method to estimate light phylloclimate within growth chambers Inra
Combes, D.; Adam, B.; Christophe, A.; Chelle, M..
In most functional-structural plant models, light is only considered as a consumable resource and plantsare usually assumed to be blind to light signals (FSPM04). However, the perception of these signals bythe plant is now well documented (e.g. Smith, 1997) and light quality is considered to play a key role inthe changes of plant's architecture and the dynamics of vegetation (e.g. Ballaré et al, 1997). In order tointroduce the photomorphogenesis process in FSPM, it is necessary to determine how the perception ofthe light signal occurs on the whole plant. This determination of the perception requires the estimationof light received locally under global controlled environment i.e. in growth chambers.One way to locally estimate the light is the use of a...
Tipo: Conference Paper Palavras-chave: CHAMBRE DE CROISSANCE; INTERCEPTION LUMINEUSE; PHOTOMORPHOGENESE CONTROLLED ENVIRONMENT; RADIATIVE TRANSFER.
Ano: 2007 URL: http://www.prodinra.inra.fr/prodinra/pinra/doc.xsp?id=PROD2010aba33c65&uri=/notices/prodinra1/2010/08/
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Arabidopsis plants acclimate to water deficit at low cost through changes of carbon usage: an integrated perspective using growth, metabolite, enzyme, and gene expression analysis Inra
Hummel, I.; Pantin, F.; Sulpice, R.; Piques, M.; Rolland, G.; Dauzat, M.; Christophe, A.; Pervent, M.; Bouteillé, M.; Stitt, M.; Gibon, Y.; Muller, B..
Growth and carbon (C) fluxes are severely altered in plants exposed to soil water deficit. Correspondingly, it has been suggested that plants under water deficit suffer from C shortage. In this study, we test this hypothesis in Arabidopsis (Arabidopsis thaliana) by providing an overview of the responses of growth, C balance, metabolites, enzymes of the central metabolism, and a set of sugar-responsive genes to a sustained soil water deficit. The results show that under drought, rosette relative expansion rate is decreased more than photosynthesis, leading to a more positive C balance, while root growth is promoted. Several soluble metabolites accumulate in response to soil water deficit, with K+ and organic acids as the main contributors to osmotic...
Tipo: Journal Article Palavras-chave:  .
Ano: 2010 URL: http://www.prodinra.inra.fr/prodinra/pinra/doc.xsp?id=PROD2010b164e296&uri=/notices/prodinra1/2010/12/
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Influence of intra-shoot trophic competition on shoot development in two grapevine cultivars (Vitis vinifera) Inra
Pallas, B.; Louarn, G.; Christophe, A.; Lebon, E.; Lecoeur, J..
The effect of trophic competition between vegetative sources and reproductive sinks on grapevine (Vitis vinifera L.) shoot development was analyzed. Two international cultivars (Grenache N and Syrah) grown in pots, which were well watered, were studied. A large range of trophic competition levels was obtained by modifying the cluster loads per plant. An analytical breakdown of the branching system was used to analyze the effects of trophic competition. Phytomer production on the primary axis and the probability and timing of axillary budburst were not affected by trophic competition. However, the duration of development and leaf production rate for secondary axes were both significantly affected. The impact of trophic competition differed within the...
Tipo: Journal Article Palavras-chave: RAMIFICATION; COMPETITION TROPHIQUE; VARIABILITE PHENOTYPIQUE.
Ano: 2008 URL: http://www.prodinra.inra.fr/prodinra/pinra/doc.xsp?id=PROD20082610c46f&uri=/notices/prodinra1/2008/09/
Registros recuperados: 3
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