Physiological Performance of Some High Temperature Tolerant Tomato Genotypes

Abstract

This study was conducted for determining high temperature tolerance in tomato genotypes. First year, 131 genotypes tomatoes were used, second year, 20 genotypes from the first year with endurance to higher temperature, also 2 sensitive and 2 trade varieties were used. Two testing fields were established in 2 different periods in the summer to study control and high temperature of genotypes. During the testing period, these are the measured, analyzed and examined parameters in plants and fruits: 0-5 scale evaluation of visual damage of high temperature stress on green night to plant, leaf stoma conductance, membrane damage on leaf cells, leaf water potential, leaf osmotic potential, leaf temperature, leaf area index, K and Ca concentrations in leaf and fruit According to the results tomato genotypes were sorted from highest to lowest levels for their stress tolerance.

Keywords: Solanum lycopersicum, high temperature, tolerance, stress physiology, stomatal conductance, water potential, membrane injury, K and Ca.