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Foliar Spraying with Zineb Increases Fruit Productivity and Alleviates Oxidative Stress in Two Tomato Cultivars
Authors:Calatayud   Á.  Barreno  E.
Affiliation:(1) Institut Cavanilles de Biodiversitat i Biología Evolutiva, Facultat de Ciències Biológiques, Universitat de València, c/Dr. Moliner 50, 46100 Burjassot (València), Spain;(2) Institut Cavanilles de Biodiversitat i Biología Evolutiva, Facultat de Ciències Biológiques, Universitat de València, c/Dr. Moliner 50, 46100 Burjassot (València), Spain
Abstract:The effects of foliar spraying of the dithiocarbamate zineb on two cultivars of tomato grown in the field in a site with high ozone concentrations were studied by means of biomass assessment, antioxidant enzyme assays, lipid peroxidation, and chlorophyll fluorescence measurements. Zineb prevented the peroxidation of membrane lipids and decreased the activity of scavenging enzymes, which suggests that plants sprayed with zineb are subjected to lower oxidative stress than controls. The beneficial effects of zineb protection is the utilization of a larger fraction of absorbed radiant energy in photosynthesis and a larger fruit yield in plants of both cultivars.
Keywords:antioxidant enzymes  chlorophyll fluorescence  lipid peroxidation  Lycopersicon esculentum  ozone  production
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