Estudio de diferentes aspectos agronómicos y fisiológicos del zinc en plantas hortícolas: Fitoextracción y biofortificación

Esta tesis trata de hacer un estudio de las diferentes estrategias en plantas de Lactuca sativa y Brassica oleracea ante la toxicidad de Zn (0.5 mM), tales como el metabolismo de los carboxilatos y el metabolismo oxidativo y del glutatión así como utilizar estas plantas hortícolas en programas de descontaminación (fitoextracción) en aquellas zonas contaminadas por este elemento traza.Tesis Univ. Granada. Programa Oficial de Doctorado en: Biología Fundamental y de SistemasGrupo de Investigación ``Diagnóstico Nutricional de las Plantas Cultivadas en Condiciones Adversas´´ (AGR-161, Plan Andaluz de Investigación, Junta de Andalucía

Zinc biofortification improves phytochemicals and amino-acidic profile in Brassica oleracea cv. Bronco

Zn deficiency is currently listed as a major risk factor for human health. Recently, a complimentary solution to mineral malnutrition termed 'biofortification' has been proposed. The aim of this study was to investigate the possible effects of a Zn-biofortification program on Zn levels, amino acidic profile and the phytochemicals content in an edible leafy vegetable, such as Brassica oleracea cv. Bronco. Our results indicate that supplementation of 80-100μM Zn is optimal for maintaining the normal growth of plants and to promote the major Zn concentration in the edible part of B. oleracea. Any further increase of Zn supply induced an accumulation of total amino acids, and increased the enzymatic activities involved in sulfur assimilation and synthesis of phenols, finally resulting in a foliar accumulation of glucosinolates and phenolic compounds. Thus, it could be proposed that the growth of B. oleracea under 80-100μM Zn may increase the intake of this micronutrient and other beneficial compunds for the human health