Strigolactones Affect Growth Parameters and Some Antioxidant Enzyme Activities in Wheat (Triticum aestivum L.) under Salt Stress

Abstract

External applications of strigolactones affect plant growth positively owing to the potential of adapting plants to the tolerance system under stress conditions. In this study, the effect of synthetic analogue strigolactone (GR24) pre-treatment to the seeds of salt-tolerant and salt-sensitive bread wheat (Triticum aestivum L.) varieties on growth parameters, antioxidant enzymes, such as superoxide dismutase (SOD), ascorbate peroxidase (APX) and glutathione reductase (GR) activity under salt stress were investigated. Salt stress has inhibited shoot development. Root development of the tolerant one was better than sensitive one under salt stress conditions. Salt application to sensitive variety caused the inhibition of APX and GR activities, and pre-treatment increased these activities. In conclusion, GR24 pre-treatment has an encouraging role in the growth of wheat plants by stimulating these antioxidant enzymes against salinity.