[Sunflower physiology [first part: plant functioning, second part: yield elaboration]]

absorption de substances nutritives azote biological development caracteres de rendimiento composante de rendement facteur de rendement factores de rendimiento feuille helianthus annuus hojas inflorescence inflorescences inflorescencias leaves lipid metabolism nitrogen nutrient uptake nutrition des plantes oil crops photosynthese photosynthesis plant nutrition plant water relations plantas oleaginosas racine relaciones planta agua relation plante eau roots yield components yield factors