EFFECT OF SALINITY STRESS ON ANTIOXIDANT ACTIVITY AND GRAIN YIELD OF DIFFERENT WHEAT GENOTYPES

Authors : Mirela MATKOVİĆ STOJŠİN, Sofija PETROVİĆ, Miodrag DİMİTRİJEVİĆ, Jovana ŠUĆUR, Djordje MALENČİĆ, Veselinka ZEČEVİĆ, Borislav BANJAC, Desimir KNEŽEVİĆ

Pages : 33-40

Doi:10.17557/tjfc.1002061

View : 49 | Download : 15

Publication Date : 2022-06-20

Article Type : Research Paper

Abstract :In order to evaluate the antioxidant activity of wheat in salinity stress conditions, an experiment with 27 wheat genotypes grown on two types of soil was conducted: solonetz insert ignore into journalissuearticles values(increased salinity); and chernozem insert ignore into journalissuearticles values(control);, during two vegetation seasons insert ignore into journalissuearticles values(2015/2016 and 2016/2017);. Analysis of DPPH radical scavenging activity and phenolic content insert ignore into journalissuearticles values(PC); were performed in different phenophases of wheat insert ignore into journalissuearticles values(tillering, stem elongation and heading);. Genotypes showed significantly higher DPPH radical scavenging activity insert ignore into journalissuearticles values(9.82 mg trolox equivalents insert ignore into journalissuearticles values(TE); per mg of dry matter insert ignore into journalissuearticles values(d.m.);); and PC insert ignore into journalissuearticles values(8.15 mg gallic acid equivalents insert ignore into journalissuearticles values(GAE); per mg d.m.); under salinity stress conditions compared to values obtained on control insert ignore into journalissuearticles values(8.52 mg TE mg-1 d.m. and 7.13 mg GAE mg-1 d.m., respectively);. All analyzed factors insert ignore into journalissuearticles values(genotype, soil type and year); had the highly significant influence on phenotypic variation of grain yield. Salinity stress reduced grain yield by 30%, whereas drought stress in 2016/2017 vegetation season reduced grain yield by 20%. Highly significant and positive correlations are present between grain yield and parameters of antioxidant activity in all growth stages of wheat and both soil conditions. Therefore, it could be possible to select salinity tolerant genotypes in early growth stages. DPPH scavenging activity and total phenolic content are in highly significant and positive correlation in all growth stages, which indicates that antioxidant activity is highly derived by phenolics. 
Keywords : DPPH, chernozem, correlation, phenolic content, solonetz

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