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Title

Zinc nutritional status of pecan trees influences physiological and nutritional indicators, the metabolism of oxidative stress, and yield and fruit quality

AuthorsOjeda-Barrios, Dámaris L.; Castillo-González, Jorge; Hernández-Rodríguez, Adriana; Abadía Bayona, Javier CSIC ORCID ; Sánchez, Esteban; Parra-Quezada, Rafael; Vallés-Aragón, Maria-Cecilia; Sida-Arreola, Juan A. Pedro
KeywordsCarya illinoensis
Catalase
glutathione peroxidase
superoxide dismutase
zinc deficiency
Issue Date2019
CitationOjeda-Barrios D, Castillo-González J, Hernández-Rodríguez A, Abadía J, Sánchez E, Parra-Quezada R, Vallés-Aragón MC, Sida-Arreola JAP. Zinc nutritional status of pecan trees influences physiological and nutritional indicators, the metabolism of oxidative stress, and yield and fruit quality. Botanicae Horti Agrobotanici Cluj-Napoca 47 (2): 531-537 (2019)
AbstractIn 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.
Description7 Pags.- 1 Tabl.- 4 Figs.
Publisher version (URL)http://www.notulaebotanicae.ro/index.php/nbha/article/view/11389
URIhttp://hdl.handle.net/10261/174629
ISSN0255-965X
E-ISSN1842-4309
Appears in Collections:(EEAD) Artículos

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