DETERMINATION OF ECOPHYSIOLOGICAL RESPONSES TO TEMPERATURE SHOCK IN DIFFERENT WHEAT GENOTYPES

Abstract

Studies about the project mainly consists of two stages as plant breeding in the laboratory and analysis. Within the scope of laboratory studies, germination beds were formed in the Ecophysiology Laboratory of Eskişehir Osmangazi University, Faculty of Science and Literature and where the growth of the plants was ensured. Seeds of different genotypes (Kirik, Bayraktar, Aldane, Kenanbey, Seyhan, Yüreğir89, Uzunyayla, Seri82, Fuatbey, Canik) of Triticum aestivum L. were used as alive materials. Within the scope of laboratory studies, some ecophysiological parameters plants indexes. Wheat seeds belonging to different genotypes were left in germination beds for 14 days and applications were divided into 7 groups as control (21°C), 25°C, 30°C, 35°C, 40°C, 45°C and 50°C. At the end of the process, germination experiments were terminated and analyzes were started.

                As a result of the obtained data from experiments and analyzes; It was determined that applications above 35 °C inhibited vegetative growth in studied genotypes. It has been observed that the seeds can tolerate the increasing heat between the applications of 21-40°C. However, it was determined that the seeds could not tolerate the temperature especially at 45°C. The increase in seasonal temperatures with global warming has increased the importance of heat shock resistant cereal genotypes for humanity. Breeding of heat shock resistant genotypes is recommended to prevent economic losses due to heat shock. This is only possible by determining the high temperature tolerance genotypes by investigations such as in our study. Afterward, researchers should be focusing on the breeding of these determined genotypes.