The Effects of Exogenous Salicylic Acid and Strigolactone Applications on Seedling Growth and Antioxidant Activity in Tomato Seedlings Under Short-Term Drought Stress

Authors : Gamze BALTACIER, Sevgi DONAT, Okan ACAR

Pages : 89-101

Doi:10.21597/jist.1179027

View : 47 | Download : 11

Publication Date : 2023-03-01

Article Type : Research Paper

Abstract :Drought is the main abiotic stress factor that negatively affects the growth, development, and yield of plants. Salicylic acid insert ignore into journalissuearticles values(SA); is a plant growth regulator associated with stress tolerance in plants. Exogenous application of SA prevents against stress dependent damage. Strigolactones insert ignore into journalissuearticles values(SLs); are another phytohormone in plants, they are known to positively affect plant growth with exogenous applications due to their potential to stimulate the tolerance system of plants under stress conditions. The aim of this study is determine to SA and GR24 effects on the negative impacts of drought stress on tomato “Full F1” seedlings, which is the most preferred commercial variety by professional farmers in Çanakkale insert ignore into journalissuearticles values(Turkey);, based on physiological [insert ignore into journalissuearticles values(shoot-root length, biomass, relative water content insert ignore into journalissuearticles values(RWC);, specific leaf area insert ignore into journalissuearticles values(SLA);, total chlorophyll content insert ignore into journalissuearticles values(SPAD);] and biochemical parameters [Total protein amount, glutathione reductase activity insert ignore into journalissuearticles values(GR);, catalase activity insert ignore into journalissuearticles values(CAT);, peroxidase activity insert ignore into journalissuearticles values(POX);, ascorbate peroxidase activity insert ignore into journalissuearticles values(APX);, hydrogen peroxide amount insert ignore into journalissuearticles values(H2O2);, lipid peroxidation amount insert ignore into journalissuearticles values(TBARS);]. Fourty-five days old seedlings kept five days for acclimation, then the seedlings were treated with exogenous GR24 insert ignore into journalissuearticles values(0.015 mM); and SA insert ignore into journalissuearticles values(0.1 mM); applications. According to our results, Full F1 tomato variety was adversely affected by short-term drought stress. However, especially SA+GR24 application reduced lipid peroxidation by regulating antioxidant capacity and increased drought tolerance of this cultivar. In this context, it can be said that the combined use of these phytohormones can be used to protect the Full F1 tomato variety from drought stress damage.
Keywords : Drought stress, Salicylic acid, GR24, Solanum lycopersicum L, Oxidative stress

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