Akademik Veri Yönetim Sistemi
Iğdır Üniversitesi Fen Bilimleri Enstitüsü Dergisi, cilt.13, sa.1, ss.89-101, 2023 (Hakemli Dergi)
Drought is the main abiotic stress factor that negatively
affects the growth, development, and yield of plants. Salicylic acid (SA) is a
plant growth regulator associated with stress tolerance in plants. Exogenous
application of SA prevents against stress dependent damage. Strigolactones
(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 to determine physiological [(shoot-root length, biomass, relative water
content (RWC), specific leaf area (SLA), total chlorophyll content (SPAD)] and
biochemical parameters [Total protein amount, glutathione reductase activity (GR),
catalase activity (CAT), peroxidase activity (POX), ascorbate peroxidase
activity (APX), hydrogen peroxide amount (H2O2), lipid
peroxidation amount (TBARS)] the effects of SA and synthetic strigolactone (GR24) on the negative effects of drought stress on tomato “Full F1” seedlings,
which is the most preferred commercial variety by professional farmers in
Çanakkale (Turkey). Fourty-five days old seedlings kept five days for acclimation,
then the seedlings were treated with exogenous GR24 (0.015 mM) and SA (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.