Differences in the light‐dependent changes of the glutathione metabolism during cold acclimation in wheat varieties with different freezing tolerance

• DOI: 10.1111/jac.12566
• Publication Date: 2021-10-30T09:28:54Z
• Authors: Muhammad Ahsan As...; Eszter Balogh; Gabriella Szalai; Gábor Galiba; Gábor Kocsy
• Keywords: Light intensity; Cold hardening; Glutathione disulfide

Abstract Light‐dependent (250 or 500 µmol/m 2 /s, red/far‐red: 15/1; 250 /s and 10/1) adjustment of glutathione metabolism during cold acclimation (5°C, 7 d) was compared in four wheat genotypes (14‐day‐old) differing freezing tolerance. Only the shoot fresh weight two tolerant increased cold, regardless light conditions. Their electrolyte leakage decreased high intensity. Cold greatly both amount γ‐glutamylcysteine (glutathione precursor) cysteinylglycine (degradation product) all grown intensity far‐red lights, consequently, ratio their oxidised forms exhibited a great decrease. However, induced fivefold increase hydroxymethylglutathione disulphides only sensitive light. In general, activities enzymes ascorbate–glutathione cycle were by except for cultivated The gene expression studies did not reveal any transcriptional control changes observed at metabolite activity levels. Our results show that lights are involved cold‐induced amount/activity studied antioxidants, some these alterations have positive correlation with level