Kasemsap Poonpipope, Crozat Yves.
1998. Response of cotton leaf photosynthesis to its light environment.
In : Beltwide Cotton Conferences
Autre titre : Réaction de la photosynthèse des feuilles de cotonnier à son environnement lumineux
Résumé : Light is one of the most important resources for plant. Light level in canopies varies greatly. Previous research using individual leaf shading showed no photosynthetic response to reduce light environment to main stem leaves. Our objective was to determine photosynthetic response of main stem, sympodial and monopodial leaves to different growth light environment. We monitored light environment on leaf surface and measured photosynthesis rates at different leaf ages. As leaf aged, light environment of main stem leaves slightly decreased while sympodial and monopodial leaves it rapidly decreased. Pmax for main stem and sympodial leaves rapidly decrease with increasing leaf age. That significant decline in Pmax (70%) of main stem leaves was associated with non significant reduction in leaf light environment indicated physiological response caused by leaf aging. Finally, the positive correlation between Pmax and different light environment suggest photosynthetic adaptation of cotton leaves to growth light environment, in addition to physiological changes with leaf aging.
Mots-clés Agrovoc : Gossypium hirsutum, photosynthèse, lumière, régime lumineux, stade de développement
Classification Agris : F61 - Physiologie végétale - Nutrition
Auteurs et affiliations
- Kasemsap Poonpipope
- Crozat Yves, CIRAD-AMIS-AGRONOMIE (FRA)
Autres liens de la publication
Source : Cirad - Agritrop (https://agritrop.cirad.fr/390102/)
[ Page générée et mise en cache le 2024-04-24 ]
