| dc.creator | Yañez-Mansilla,Erwin | |
| dc.creator | Cartes,Paula | |
| dc.creator | Reyes-Díaz,Marjorie | |
| dc.creator | Ribera-Fonseca,Alejandra | |
| dc.creator | Alberdi,Miren | |
| dc.date | 2014-04-01 | |
| dc.date.accessioned | 2019-05-17T13:11:48Z | |
| dc.date.available | 2019-05-17T13:11:48Z | |
| dc.identifier | https://scielo.conicyt.cl/scielo.php?script=sci_arttext&pid=S0718-16202014000100006 | |
| dc.identifier.uri | https://revistaschilenas.uchile.cl/handle/2250/98134 | |
| dc.description | Nitrogen (N) is an essential nutrient for photosynthesis and may influence phenolic compound synthesis in higher plants. The effect of different amounts of N (0 to 38 mM) provided on a short-term (4 d) basis on the photosynthetic and antioxidant performance of highbush blueberry cultivars (Legacy and Bluegold) grown in a nutrient solution was studied. In both cultivars, the N concentration of leaves slightly increased in response to the N supply, with Bluegold frequently showing higher N concentrations than Legacy. Photosynthesis was reduced in Bluegold at the highest N dose, whereas in Legacy, a decrease of CO2 assimilation occurred under N starvation. This decrease in photosynthesis was accompanied by enhanced lipid peroxidation but only in Bluegold. In both cultivars superoxide dismutase (SOD) was activated with an increasing N supply. Legacy also showed increased SOD activity to counteract oxidative stress at higher N levels. Radical scavenging activity was not affected by the N supply. However, the total phenols and anthocyanins steadily declined in the leaves of Legacy, and flavonoids were significantly increased in the roots of both cultivars with increasing N treatments. Thus, our findings indicate that blueberry cultivars exhibit differential sensitivity to short-term N stress, and SOD appears to be more involved than phenolic compounds in the amelioration of N-induced oxidative stress. Further studies are required to confirm the sensitivity to either N starvation in Legacy or N excess in Bluegold under long-term conditions. | |
| dc.format | text/html | |
| dc.language | en | |
| dc.publisher | Pontificia Universidad Católica de Chile. Facultad de Agronomía e Ingeniería Forestal | |
| dc.relation | 10.4067/S0718-16202014000100006 | |
| dc.rights | info:eu-repo/semantics/openAccess | |
| dc.source | Ciencia e investigación agraria v.41 n.1 2014 | |
| dc.subject | Nitrogen | |
| dc.subject | oxidative damage | |
| dc.subject | phenolic compounds | |
| dc.subject | superoxide dismutase | |
| dc.subject | Vaccinium corymbosum | |
| dc.title | Photosynthetic and antioxidant performance are differentially affected by short-term nitrogen supply in highbush blueberry cultivars | |
