The effect of thiamine and pyridoxine on yield and some physiological wheat traits under drought stress conditions

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Seifi Akbar; Ahmadi Ali; Poustini Kazem

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Journal Paper

Paper Information

Journal: IRANIAN JOURNAL OF FIELD CROP SCIENCE Year:2023 | Volume:54 | Issue:1 Page(s): 11-25

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Information Journal Paper

Title

The effect of thiamine and pyridoxine on yield and some physiological wheat traits under drought stress conditions

Author(s)

Seifi Akbar | Ahmadi Ali | Poustini Kazem | Issue Writer Certificate

Keywords

Drought stress

Irrigation

Physiological traits

vitamin

Wheat Yield

Abstract

Drought stress is one of the most important abiotic stresses limiting wheat production. To improve the growth and yield of wheat under drought stress, a factorial experiment was performed based on a randomized complete block design with three replicates in the research greenhouse of the University of Tehran. Experimental treatments included irrigation at two levels (well-watered and drought stress) and vitamin foliar application at four levels (control, thiamine, pyridoxine, and thiamine+pyridoxine). The results showed that drought stress reduced the relative water content of flag leaves by 21%. The use of vitamins increased the amount of this trait compared to the control treatment. The chlorophyll number (SPAD) of flag leaf increased under drought stress, but the use of vitamins had no significant effect on this trait. Drought stress had an increasing effect on leaf free proline content and foliar application of thiamine and its combination with pyridoxine, respectively, increased this trait by 53% and 32% compared to treatment without foliar application under drought stress conditions. Also, the percentage of electrolyte leakage and malondialdehyde content of flag leaf under drought stress increased by 31% and 103%, respectively. Vitamins reduced the amount of malondialdehyde and had no significant effect on the percentage of electrolyte leakage. Drought stress also reduced wheat grain and biological yields. Foliar application of vitamins showed an additive effect on these traits compared to the control treatment. The highest grain yield per plant was obtained in treatments of pyridoxine (1.1 g) and its combination with thiamine (1.2 g).

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