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| Chenu, K.; Lecoeur, J.. |
| Incident light affects orgnaogenesis and morphogenesis processes involved in leaf development through the amount of radiation absorbed by the plant (Chenu et al., 2005). The genetic variability of these responses was investigated on Arabidopsis thaliana ecotypes (Col, Di-m, Ler, Ws) and mutants (se-1, rot3-1, ron2-2, p70S-KOR) displaying contrasted architectures and radiation use efficiencies (Fig. 1).Plants were grown under various levels of incident light, with a stable light quality. The local plantenvironmentinteractions were estimated for each genotype, from plant emergence to the end ofrosette expansion, using an architectural model (Barczi et al., 1997) coupled with a radiative model (Dauzat and Eroy, 1997). Leaf development was assessed in terms of... |
| Tipo: Conference Paper |
Palavras-chave: MAQUETTE 3D; INTERACTION GENOTYPE ENVIRONNEMENT ARABIDOPSIS; LEAF DEVELOPMENT; ABSORBED RADIATION; LIGHT INTENSITY; 3D VIRTUAL PLANT; GENOTYPIC VARIABILITY. |
| Ano: 2007 |
URL: http://www.prodinra.inra.fr/prodinra/pinra/doc.xsp?id=PROD2010d4a3b41e&uri=/notices/prodinra1/2010/08/ |
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| Violle, C.; Garnier, E.; Lecoeur, J.; Roumet, C.; Podeur, C.; Blanchard, A.; Navas, M.L.. |
| Although of primary importance to explain plant community structure, general relationships between plant traits, resource depletion and competitive outcomes remain to be quantified across species. Here, we used a comparative approach to test whether instantaneous measurements of plant traits can capture both the amount of resources depleted under plant cover over time (competitive effect) and the way competitors perceived this resource depletion (competitive response). We performed a large competition experiment in which phytometers from a single grass species were transplanted within 18 different monocultures grown in a common-garden experiment, with a time-integrative quantification of light and water depletion over the phytometers' growing season.... |
| Tipo: Journal Article |
Palavras-chave: COMPETITIVE RESPONSE; COMPETITIVE EFFECT; PHYTOMETER; PLANT FUNCTIONAL TRAIT; RESOURCE COMPETITION. |
| Ano: 2009 |
URL: http://www.prodinra.inra.fr/prodinra/pinra/doc.xsp?id=PROD20101d0875c&uri=/notices/prodinra1/2010/08/ |
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| Chenu, K.; Rey, H.; Dauzat, J.; Lecoeur, J.. |
| Light interception is a major contributor to biomass accumulation of crops. Beer's law has beenextensively used to estimate the amount of light intercepted by a plant at canopy level. Thismethod, based on the use of the leaf area index (LAI), is designed for well-developed crops wherethe canopy is assumed to be a turbid medium (Jones, 1992). However this assumption is seldomverified and in most situations canopies are strongly heterogeneous, as for example in perennialcrops such as vineyards and orchards (e.g. Louarn et al., 2007) or in row crops during the firstdevelopmental stages or when leaf senescence occurs. We propose here to test a method based on3D modelling to quantify the local light environment of plants in different situations,... |
| Tipo: Conference Paper |
Palavras-chave: INTERCEPTION LUMINEUSE; MAQUETTE 3D; INTERACTION GENOTYPE ENVIRONNEMENT. |
| Ano: 2007 |
URL: http://www.prodinra.inra.fr/prodinra/pinra/doc.xsp?id=PROD2010eb516727&uri=/notices/prodinra1/2010/08/ |
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| Vear, F.; Triboi, A.M.; Lecoeur, J.; Vincourt, P.; Debaeke, P.. |
| In sunflower, the active leaf area during the grain filling period has been shown to be an important character, which can be used to predict seed yield. Total and residual leaf areas of inbred lines and their hybrids are significantly correlated, but there may be some interaction between parents. Strict sense heritability is moderate. The relation between residual leaf area and seed yield has been confirmed using simplified leaf measurements on recombinant inbred lines and estimation of leaf area index with a ceptometer on hybrids. Studies of use of residual leaf area as a character in breeding for seed yield showed that F2 or F3 plants with the smallest leaf areas can be discarded, but, according to genotype, those with medium or largest leaf area give... |
| Tipo: Journal Article |
Palavras-chave: FLOWERING; HYBRID; INBRED LINE; INHERITANCE; LEAF AREA; PREDICTION. |
| Ano: 2010 |
URL: http://www.prodinra.inra.fr/prodinra/pinra/doc.xsp?id=PROD2011fcd6f66f&uri=/notices/prodinra1/2011/06/ |
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