Evaluation of Heat Shock-Induced Stress Tolerance to Some Abiotic Factors in Barley Seedlings by Chlorophyll a Fluorescence Technique
Year: 2020
Type: article
Abstract: In this study, the effect of heat shock pretreatment on the occurence of cross tolerance to heat, salinity, drought, and UV-B stress in three barley (Hordeum vulgare L.) cultivars (Bülbül-89, Tarm-92, and Tokak 157/37) was investigated through the chlorophyll a fluorescence technique. Heat stress increased Fo (minimum fluorescence) significantly when compared to the controls of these barley cultivars, but heat shock pretreatment led to lower Fo values in all cultivars. Fm (maximum fluorescence), Fv/Fm (maximum quantum efficiency of photosystem II) and PI (performance index) were significantly decreased in all barley cultivars subjected to heat stress. In Tarm-92, heat shock pretreatment caused higher Fm, Fv/Fm and PI values than heat stress alone. On the other hand, heat shock pretreatment decreased Fm, Fv/Fm and PI more drastically in Bülbül-89 and Tokak 157/37. As a consequence, changes in Fo, Fm, Fv/Fm and PI may be attributed to thermotolerance development in Tarm-92 as a result of heat shock pretreatment.
Author: Ali DOĞRU
Institution: Sakarya University
Language: English
Subfield: Plant Science
Domain: Life Sciences
SDG: Zero hunger
Open Access status: diamond
OpenAlex ID: W3094291688