Zinc Nutritional Status on Physiological and Nutritional Indicators, Metabolism of Oxidative Stress, Yield and Fruit Quality of Pecan Tree

In the United States of America and in Mexico, zinc deficiency is a common nutritional disorder in pecan trees [Carya illinoinensis (Wangenh.) C. Koch], especially in calcareous soils. This study in Chihuahua, northern Mexico, analyses the effects of zinc nutritional status on various physiological...

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Published in:Notulae botanicae Horti agrobotanici Cluj-Napoca 2019-07, Vol.47 (2), p.531-537
Main Authors: OJEDA-BARRIOS, Damaris, CASTILLO-GONZALEZ, Jorge, HERNANDEZ-RODRIGUEZ, Adriana, ABADIA, Javier, SANCHEZ, Estaban, PARRA-QUEZADA, Rafael, VALLES-ARAGON, Maria-Cecilia, SIDA-ARREOLA, Juan A. Pedro
Format: Article
Language:eng ; fre ; ger ; rum
Subjects:
Bioindicators
Calcareous soils
Carya illinoinensis
Catalase
Design of experiments
Detoxification
Enzymatic activity
Enzymes
Experimental design
Food quality
Fruits
Glutathione
Glutathione peroxidase
Indicator species
Leaf area
Leaves
Metabolism
Necrosis
Nutrient deficiency
Nutritional status
Oxidative metabolism
Oxidative stress
Peroxidase
Physiological effects
Physiology
Reactive oxygen species
Superoxide dismutase
Trees
Yield
Zinc
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Summary:In the United States of America and in Mexico, zinc deficiency is a common nutritional disorder in pecan trees [Carya illinoinensis (Wangenh.) C. Koch], especially in calcareous soils. This study in Chihuahua, northern Mexico, analyses the effects of zinc nutritional status on various physiological and nutritional indicators, on the metabolism of oxidative stress, and on the yield and fruit quality of pecan. The aim was to identify possible bioindicators of soil zinc deficiency. The experimental design was completely randomized with four nutritional conditions with respect to zinc: a control and three levels of zinc deficiency - slight, moderate and severe. Zinc deficiency is characterised by small leaves with interveinal necrosis and rippled leaf margins. The lowest values of leaf area, SPAD values, total N and NO3 concentration were observed under conditions of severe zinc deficiency. With worsening zinc deficiency, results indicate an increased enzymatic activity of superoxide dismutase, catalase and glutathione peroxidase. Interestingly, under severe zinc deficiency there are decreases in trunk cross-sectional area growth, in yield and in percentage kernel. Increased activity of superoxide dismutase, catalase and peroxidase enzymes is associated with detoxification of reactive oxygen species. The activity of enzymes detoxifying reactive oxygen species lessens the negative effects of zinc deficiency stress, and may be good bioindicators of zinc deficiency and its visual symptoms on pecan trees.
ISSN:0255-965X
1842-4309
DOI:10.15835/nbha47211389