Zinc biofortification of guava fruit

• Grant number: 15/16685-8
• Support Opportunities: Scholarships in Brazil - Scientific Initiation
• Start date: October 01, 2015
• End date: September 30, 2016
• Field of knowledge: Agronomical Sciences - Agronomy - Crop Science
• Principal Investigator: Gustavo Henrique de Almeida Teixeira
• Grantee: Mateus Wagner Dantas de Assis
• Host Institution: Faculdade de Ciências Agrárias e Veterinárias (FCAV). Universidade Estadual Paulista (UNESP). Campus de Jaboticabal. Jaboticabal , SP, Brazil

Abstract

Zinc deficiency is more prevalent in developing countries with estimative that this deficiency affects around one third of the world's population. The lack of Zn is considered one of the most determinants risk factors related to growth deficit problem in growing children as this chemical element is involved with a wide range of metabolic functions, making part of more than 50 metallo enzymes. The recommended Zn daily allowance (RDA) varies from 2 mg.day-1 to 13 mg.day-1, for children and lactating women, respectively. Guava fruit contains approximately 0.1 mg.100 g-1, what is quite inferior to what can be found in read meet (6.3 mg.100 g-1). Therefore, due to the importance of offering food richer in Zn, the objective of this study is to evaluate the effect of the number of foliar sprays with zinc chlorine (ZnCl2) in the absence and presence of chelates aiming to biofortify fresh guava fruit. To do so, a experiment will be laid out in a completely randomize design (CRD) with a 3 x 4 x 3 factorial plan, that is, three Zn doses and the control, four sprays, and three evaluations, with four repetitions, totaling 36 parcels. That means that 'Paluma' guava tree at reproductive phase will be sprayed with two ZnCl2 sources, in the absence and presence of Zn chelate and the control (without ZnCl2 spray). The sprays will be carried out at 0, 15, 45, and 60 days after bloom (DAB). The fruit will be evaluated at 15, 45, and 60 DAB aiming to determine the Zn content and physical-chemical parameters, such as titratable acidity, pH, soluble solids content and ascorbic acid content. (AU)

Scientific publications

(References retrieved automatically from Web of Science and SciELO through information on FAPESP grants and their corresponding numbers as mentioned in the publications by the authors)

DE ASSIS, MATEUS W. D.; DE FUSCO, DEBORAH O.; COSTA, ROSANGELA C.; DE LIMA, KASSIO M. G.; CUNHA JUNIOR, LUIS C.; DE ALMEIDA TEIXEIRA, GUSTAVO H.. PLS, iPLS, GA-PLS models for soluble solids content, pH and acidity determination in intact dovyalis fruit using near-infrared spectroscopy. Journal of the Science of Food and Agriculture, v. 98, n. 15, p. 5750-5755, DEC 2018. (15/16685-8)