Non-Structural Carbohydrates, Foliar Nutrients, Yield Components and Oxidative Metabolism in Pecan Trees in Response to Foliar Applications of Growth Regulators

Damaris Leopoldina Ojeda-Barrios, Laura Raquel Orozco-Meléndez, Raquel Cano-Medrano, Esteban Sánchez-Chávez, Rafael Ángel Parra-Quezada, Marisela Calderón-Jurado, Juan Luis Jacobo-Cuellar, Elizabeth Hernández-Ordoñez and Oscar Cruz-Álvarez
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Damaris Leopoldina Ojeda-Barrios: Faculty of Agrotechnological Sciences (FACIATEC), Autonomous University of Chihuahua, Av. Universidad S/N Campus 1, Chihuahua 31310, Mexico
Laura Raquel Orozco-Meléndez: Faculty of Agrotechnological Sciences (FACIATEC), Autonomous University of Chihuahua, Av. Universidad S/N Campus 1, Chihuahua 31310, Mexico
Raquel Cano-Medrano: Postgraduate College (COLPOS), Campus Montecillos, Km. 36.5, Montecillos 56230, Mexico
Esteban Sánchez-Chávez: Center for Research in Food and Development (CIAD), Avenida Cuarta Sur, Vencedores del Desierto, Delicias, Chihuahua 33089, Mexico
Rafael Ángel Parra-Quezada: Faculty of Agrotechnological Sciences (FACIATEC), Autonomous University of Chihuahua, Av. Universidad S/N Campus 1, Chihuahua 31310, Mexico
Marisela Calderón-Jurado: Faculty of Agrotechnological Sciences (FACIATEC), Autonomous University of Chihuahua, Av. Universidad S/N Campus 1, Chihuahua 31310, Mexico
Juan Luis Jacobo-Cuellar: Faculty of Agrotechnological Sciences (FACIATEC), Autonomous University of Chihuahua, Av. Universidad S/N Campus 1, Chihuahua 31310, Mexico
Elizabeth Hernández-Ordoñez: Faculty of Agrotechnological Sciences (FACIATEC), Autonomous University of Chihuahua, Av. Universidad S/N Campus 1, Chihuahua 31310, Mexico
Oscar Cruz-Álvarez: Faculty of Agrotechnological Sciences (FACIATEC), Autonomous University of Chihuahua, Av. Universidad S/N Campus 1, Chihuahua 31310, Mexico

Agriculture, 2022, vol. 12, issue 5, 1-13

Abstract: Foliar sprays of growth regulators have commercial potential for improving the performance of some of the parameters associated with alternate bearing in pecan trees. The objective was to evaluate the behaviour of alternate bearing through analysis of seasonal variations in buds and leaflets of non-structural carbohydrates (glucose, fructose, sucrose, and starch), mineral nutrients (N-total, P, K + , Ca 2+ , Mg 2+ , Fe 2+ , Cu 2+ , Mn 2+ and Zn 2+ ), yield components (nut weight per kilogram and kernel percentage) and oxidative metabolism (superoxide dismutase, hydrogen peroxide, catalase, guaiacol peroxidase and antioxidant capacity) in cv. Wichita pecan trees in response to foliar applications of gibberellic acid (50 mg L −1 ), calcium prohexadione (500 mg L −1 ) or thidiazuron (10 mg L −1 ). The experiment was of a completely randomized experimental design with five replicates. Foliar growth regulator (GRs) sprays help maintain the concentration of non-structural carbohydrates in the leaflets and buds between the evaluation years. With the exception of K + (12.9 and 10.9 g kg −1 ) and Zn 2+ (45.1 and 30.5 mg kg −1 ), the GRs did not show any effects on the concentrations of the foliar mineral nutrients. The results suggest foliar sprays of gibberellic acid improve the performance of parameters associated with alternate bearing, including oxidative metabolism.

Keywords: alternate bearing; antioxidant capacity; Carya illinoinensis; gibberellic acid; prohexadione calcium; starch; thidiazuron (search for similar items in EconPapers)
JEL-codes: Q1 Q10 Q11 Q12 Q13 Q14 Q15 Q16 Q17 Q18 (search for similar items in EconPapers)
Date: 2022
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