Dosio Guillermo A.A., Rey Hervé, Lecoeur Jérémie, Turc Olivier. 2002. La radiacion solar durante etapas tempranas del desarrollo afecta al area foliar del girasol. Revista Argentina de Agrometeorología, 2 (2) : 113-118.
Titre anglais : Solar radiation during early development stages affects leaf area in sunflower
Résumé : Growth of successive leaves of sunflower occurs at different dates according to their nodal position along the stem. Consequently, at a given date, the developmental stages of a leaf depends on its nodal position. The objective of this work was to analyse the effect of a transitory light deficit on growth and final leaf area, as a function of the leaf developmental stage during the constraint. Two experiments, one in the field and the other in a greenhouse, were conducted without water or nutritional limitations. Artificial shadings were applied at the beginning of reproductive development. Light deficit affected leaf growth rate only during the exponential phase. Final leaf area was only reduced when stress began before and ended after the limit between exponential and non-exponential growth phases. This response was quantitative: the lesser the light amount during the sensitive period, the smaller the final leaf area.
Mots-clés Agrovoc : Helianthus annuus, croissance, feuille, éclairage
Classification Agris : F62 - Physiologie végétale - Croissance et développement
P40 - Météorologie et climatologie
Auteurs et affiliations
- Dosio Guillermo A.A., Universidad Nacional de Mar del Pata (ARG)
- Rey Hervé, CIRAD-AMIS-AMAP (FRA)
- Lecoeur Jérémie, INRA (FRA)
- Turc Olivier, INRA (FRA)
Autres liens de la publication
- Document en bibliothèque
- Localisation du document : CD_BR12417 [(Bibliothèque de Lavalette)]
Source : Cirad - Agritrop (https://agritrop.cirad.fr/520510/)
[ Page générée et mise en cache le 2024-04-06 ]
