Photosynthetic and antioxidant performance are differentially affected by short-term nitrogen supply in highbush blueberry cultivars

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 an...

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Autores principales:	Yañez-Mansilla,Erwin, Cartes,Paula, Reyes-Díaz,Marjorie, Ribera-Fonseca,Alejandra, Alberdi,Miren
Lenguaje:	English
Publicado:	Pontificia Universidad Católica de Chile. Facultad de Agronomía e Ingeniería Forestal 2014
Materias:	Nitrogen oxidative damage phenolic compounds superoxide dismutase Vaccinium corymbosum
Acceso en línea:	http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0718-16202014000100006
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spelling	oai:scielo:S0718-162020140001000062014-10-10Photosynthetic and antioxidant performance are differentially affected by short-term nitrogen supply in highbush blueberry cultivarsYañez-Mansilla,ErwinCartes,PaulaReyes-Díaz,MarjorieRibera-Fonseca,AlejandraAlberdi,Miren Nitrogen oxidative damage phenolic compounds superoxide dismutase Vaccinium corymbosum 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.info:eu-repo/semantics/openAccessPontificia Universidad Católica de Chile. Facultad de Agronomía e Ingeniería ForestalCiencia e investigación agraria v.41 n.1 20142014-04-01text/htmlhttp://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0718-16202014000100006en10.4067/S0718-16202014000100006
institution	Scielo Chile
collection	Scielo Chile
language	English
topic	Nitrogen oxidative damage phenolic compounds superoxide dismutase Vaccinium corymbosum
spellingShingle	Nitrogen oxidative damage phenolic compounds superoxide dismutase Vaccinium corymbosum Yañez-Mansilla,Erwin Cartes,Paula Reyes-Díaz,Marjorie Ribera-Fonseca,Alejandra Alberdi,Miren Photosynthetic and antioxidant performance are differentially affected by short-term nitrogen supply in highbush blueberry cultivars
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.
author	Yañez-Mansilla,Erwin Cartes,Paula Reyes-Díaz,Marjorie Ribera-Fonseca,Alejandra Alberdi,Miren
author_facet	Yañez-Mansilla,Erwin Cartes,Paula Reyes-Díaz,Marjorie Ribera-Fonseca,Alejandra Alberdi,Miren
author_sort	Yañez-Mansilla,Erwin
title	Photosynthetic and antioxidant performance are differentially affected by short-term nitrogen supply in highbush blueberry cultivars
title_short	Photosynthetic and antioxidant performance are differentially affected by short-term nitrogen supply in highbush blueberry cultivars
title_full	Photosynthetic and antioxidant performance are differentially affected by short-term nitrogen supply in highbush blueberry cultivars
title_fullStr	Photosynthetic and antioxidant performance are differentially affected by short-term nitrogen supply in highbush blueberry cultivars
title_full_unstemmed	Photosynthetic and antioxidant performance are differentially affected by short-term nitrogen supply in highbush blueberry cultivars
title_sort	photosynthetic and antioxidant performance are differentially affected by short-term nitrogen supply in highbush blueberry cultivars
publisher	Pontificia Universidad Católica de Chile. Facultad de Agronomía e Ingeniería Forestal
publishDate	2014
url	http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0718-16202014000100006
work_keys_str_mv	AT yanezmansillaerwin photosyntheticandantioxidantperformancearedifferentiallyaffectedbyshorttermnitrogensupplyinhighbushblueberrycultivars AT cartespaula photosyntheticandantioxidantperformancearedifferentiallyaffectedbyshorttermnitrogensupplyinhighbushblueberrycultivars AT reyesdiazmarjorie photosyntheticandantioxidantperformancearedifferentiallyaffectedbyshorttermnitrogensupplyinhighbushblueberrycultivars AT riberafonsecaalejandra photosyntheticandantioxidantperformancearedifferentiallyaffectedbyshorttermnitrogensupplyinhighbushblueberrycultivars AT alberdimiren photosyntheticandantioxidantperformancearedifferentiallyaffectedbyshorttermnitrogensupplyinhighbushblueberrycultivars
_version_	1714202154725539840

Photosynthetic and antioxidant performance are differentially affected by short-term nitrogen supply in highbush blueberry cultivars

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