Effect of salicylic acid on photosynthetic pigments, enzyme activity and yield of durum wheat (Triticum durum L.) under drought stress conditions
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Abstract:
In order to investigate the effect of salicylic acid on photosynthetic pigments, enzyme activity and yield of durum wheat cultivars under drought stress, a greenhouse experiment was conducted as factorial based on complete randomized design with 3 replicates. Treatments included of drought stress in two levels of normal irrigation and drought stress at the beginning of the milking stage, and salicylic acid at 0, 1, 2, and 3 mM and three different durum wheat cultivars consisted of Shabrang, Behrang and Yavaros. The results showed that the effect of late season drought stress, cultivar and salicylic acid on chlorophyll a and b contents, peroxidase and catalase enzymes, number of seeds per spike, biological yield and grain was significant (p≥0.05). Also, interaction of drought stress and salicylic acid had a significant effect on chlorophyll a and b contents, so that chlorophyll a and b contents in 3 mM salicylic acid in drought stress conditions were 32 and 35%, compared to no application of salicylic acid, respectively. Also, drought stress and salicylic acid had a significant effect on peroxidase and catalase enzymes and application of 3 mM salicylic acid caused 14 and 15% increase compared to no application of salicylic acid, respectively. Foliar application of 3 mM salicylic acid increased chlorophyll a and b contents and peroxidase and catalase enzymes activity compared to no application of salicylic acid and caused 13% in grain yield improvement of Yavaros cultivar.
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Journal title
volume 9 issue 35
pages 243- 258
publication date 2020-04
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