SciELO - Scientific Electronic Library Online

vol.15 número3Interaction effects of nitric oxideand salicylic acid in alleviating salt stress of Gossypium hirsutum L.Role of Nanoclays in Carbon stabilization in Andisols and Cambisols índice de autoresíndice de materiabúsqueda de artículos
Home Pagelista alfabética de revistas  

Servicios Personalizados




Links relacionados

  • En proceso de indezaciónCitado por Google
  • No hay articulos similaresSimilares en SciELO
  • En proceso de indezaciónSimilares en Google


Journal of soil science and plant nutrition

versión On-line ISSN 0718-9516


YANEZ-MANSILLA, E et al. Leaf nitrogen thresholds ensuring high antioxidant features of Vaccinium corymbosum cultivars. J. Soil Sci. Plant Nutr. [online]. 2015, vol.15, n.3, pp.574-586.  Epub 30-Abr-2015. ISSN 0718-9516.

Deficiency or excess of nitrogen (N) supply can promote formation of reactive oxygen species in plants, inducing oxidative stress. Otherwise, plants may enhance phenolics biosynthesis and antioxidant capacity under N deficiency, but this effect is plant species-dependent. There is no information about influence on phenolics and antioxidant activity in highbush blueberry (Vaccinium corymbosum L.), in which quality and commercial importance depend on high phenolics concentration. We studied the effect of variable N supply (0 to 38 mM) on N uptake and antioxidant responses in two highbush blueberry cultivars (Legacy and Bluegold) hydroponically grown at the long-term. Nitrogen leaves concentration was enhanced for both cultivars at increasing N supply. Bluegold decreased CO2 assimilation at 0 N treatment, possibly due to both, insufficient N concentration and a decline in superoxide dismutase (SOD) activity. In contrast, SOD was activated in Legacy at 0 N, and interestingly only this cultivar maintained CO2 assimilation rates across all N treatments. Both cultivars showed higher phenolics and antioxidant activity levels at 9 mM. Despite the differential responses among the cultivars, we propose a threshold of 15 g N kg-1 DW to ensure high antioxidant activity and quality in blueberry leaves.

Palabras clave : Antioxidant responses; phenolic compounds; photosynthesis; superoxide dismutase; Vaccinium corymbosum.

        · texto en Inglés     · Inglés ( pdf )


Creative Commons License Todo el contenido de esta revista, excepto dónde está identificado, está bajo una Licencia Creative Commons