Physiological and nutritional responses in two highbush blueberry cultivars exposed to deficiency and excess of boron

Boron (B) is an essential micronutrient required for physiological and biochemical processes in fruit crops such as highbush blueberry (Vaccinium corymbosum L.), well adapted species to acidic soils (pHwater ≤ 5.5) with relatively low B availability. However, an optimal range of B supplies...

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Autores principales:	Meriño-Gergichevich,C., Reyes-Díaz,M., Guerrero,J., Ondrasek,G.
Lenguaje:	English
Publicado:	Chilean Society of Soil Science / Sociedad Chilena de la Ciencia del Suelo 2017
Materias:	Antioxidant activity boron nutrition highbush blueberry oxidative stress
Acceso en línea:	http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0718-95162017000200005
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spelling	oai:scielo:S0718-951620170002000052017-08-31Physiological and nutritional responses in two highbush blueberry cultivars exposed to deficiency and excess of boronMeriño-Gergichevich,C.Reyes-Díaz,M.Guerrero,J.Ondrasek,G. Antioxidant activity boron nutrition highbush blueberry oxidative stress Boron (B) is an essential micronutrient required for physiological and biochemical processes in fruit crops such as highbush blueberry (Vaccinium corymbosum L.), well adapted species to acidic soils (pHwater ≤ 5.5) with relatively low B availability. However, an optimal range of B supplies is quite narrow, particularly among cultivars, making it easy to under- or over-fertilize which could lead to boron toxicity. Under controlled conditions, cultivars Brigitta and Legacy were grown in a peat moss substrate(pH 4.5) with five B concentrations (0, 50, 200, 400 and 800 µM). Plant biomass, nutrient concentration, water potential (Ψleaf), oxidative stress and antioxidant activity were determined at 30 d. Concentrations of 400 and 800 µM B reduced shoot and root growth in both cultivars, and800 µM B decreased Ψleaf in Legacy and significantly increased it in Brigitta. Boron applied at 400 µM resulted in the highest B accumulation in leaves of Brigitta (5-fold) and Legacy (2-fold), whereas Brigitta roots showed up to 60% increased B accumulation in comparison with 50 µM B, respectively. High B caused more severe oxidative stress in leaves of Legacy than B deficiency. The antioxidant activity was increased from 50 to 400 µM B in both cultivars. Boron added at 400 and 800 µM impaired physiological and biochemical performance probably due to toxicity, demonstrating that highbush blueberry in a genotype-dependent manner has relatively low B requirement.info:eu-repo/semantics/openAccessChilean Society of Soil Science / Sociedad Chilena de la Ciencia del SueloJournal of soil science and plant nutrition v.17 n.2 20172017-06-01text/htmlhttp://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0718-95162017000200005en10.4067/S0718-95162017005000024
institution	Scielo Chile
collection	Scielo Chile
language	English
topic	Antioxidant activity boron nutrition highbush blueberry oxidative stress
spellingShingle	Antioxidant activity boron nutrition highbush blueberry oxidative stress Meriño-Gergichevich,C. Reyes-Díaz,M. Guerrero,J. Ondrasek,G. Physiological and nutritional responses in two highbush blueberry cultivars exposed to deficiency and excess of boron
description	Boron (B) is an essential micronutrient required for physiological and biochemical processes in fruit crops such as highbush blueberry (Vaccinium corymbosum L.), well adapted species to acidic soils (pHwater ≤ 5.5) with relatively low B availability. However, an optimal range of B supplies is quite narrow, particularly among cultivars, making it easy to under- or over-fertilize which could lead to boron toxicity. Under controlled conditions, cultivars Brigitta and Legacy were grown in a peat moss substrate(pH 4.5) with five B concentrations (0, 50, 200, 400 and 800 µM). Plant biomass, nutrient concentration, water potential (Ψleaf), oxidative stress and antioxidant activity were determined at 30 d. Concentrations of 400 and 800 µM B reduced shoot and root growth in both cultivars, and800 µM B decreased Ψleaf in Legacy and significantly increased it in Brigitta. Boron applied at 400 µM resulted in the highest B accumulation in leaves of Brigitta (5-fold) and Legacy (2-fold), whereas Brigitta roots showed up to 60% increased B accumulation in comparison with 50 µM B, respectively. High B caused more severe oxidative stress in leaves of Legacy than B deficiency. The antioxidant activity was increased from 50 to 400 µM B in both cultivars. Boron added at 400 and 800 µM impaired physiological and biochemical performance probably due to toxicity, demonstrating that highbush blueberry in a genotype-dependent manner has relatively low B requirement.
author	Meriño-Gergichevich,C. Reyes-Díaz,M. Guerrero,J. Ondrasek,G.
author_facet	Meriño-Gergichevich,C. Reyes-Díaz,M. Guerrero,J. Ondrasek,G.
author_sort	Meriño-Gergichevich,C.
title	Physiological and nutritional responses in two highbush blueberry cultivars exposed to deficiency and excess of boron
title_short	Physiological and nutritional responses in two highbush blueberry cultivars exposed to deficiency and excess of boron
title_full	Physiological and nutritional responses in two highbush blueberry cultivars exposed to deficiency and excess of boron
title_fullStr	Physiological and nutritional responses in two highbush blueberry cultivars exposed to deficiency and excess of boron
title_full_unstemmed	Physiological and nutritional responses in two highbush blueberry cultivars exposed to deficiency and excess of boron
title_sort	physiological and nutritional responses in two highbush blueberry cultivars exposed to deficiency and excess of boron
publisher	Chilean Society of Soil Science / Sociedad Chilena de la Ciencia del Suelo
publishDate	2017
url	http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0718-95162017000200005
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_version_	1714206558227791872

Physiological and nutritional responses in two highbush blueberry cultivars exposed to deficiency and excess of boron

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