Effect of Application of Sources and Amounts of Selenium on Yield and Some Physiological Traits of Three Wheat Cultivars in Maragheh Dryland Conditions

Document Type : Research Paper

Authors

1 PhD Student, Department of Agronomy and Plant Breeding, Islamic Azad University, Miyaneh Branch, Miyaneh, Iran

2 Assistant Professor, Department of Agronomy and Plant Breeding, Islamic Azad University, Miyaneh Branch, Miyaneh, Iran

3 Assistant Professor, Department of Soil Sciences, Islamic Azad University, Miyaneh Branch, Miyaneh, Iran

Abstract

In order to investigate the effects of different sources and selenium values on yield, stress sensitivity indices and some physiological traits of rainfed wheat cultivars under cadmium stress in the Maragheh region, an experiment was conducted in field and greenhouse states in year 2017-2018. In the field section, factor a was different sources of selenium (sodium selenite and selenite), factor b was different amounts of selenium (0, 18 and 36 g.ha-1) and factor c was three wheat cultivars (Azar 2, Pishtaz and Sardari). Results of analysis of variance showed that there was a significant difference between yield and yield components of cultivars under normal conditions and moisture stress. Average grain yield and grain weight per spike of genotypes under normal conditions was respectively (1752.83 kg.ha-1 and 0.591 g) and (1790.82 kg.ha-1 and 0.59). Pishtaz and Sardari genotypes had the highest and lowest yield under normal conditions (18 and 36 g.ha-1 sodium selenite) and moisture stress (Not using selenium), respectively. In the greenhouse section, a field experiment was chosen based on the selection of a cultivar (Pishtaz) and a two-factor factorial experiment was conducted in RB with three replications. In this section, factor A was different values of cadmium (concentrations of 0, 350 and 700 μM) and factor b was sodium selenate (concentrations of 0, 1.5 and 3 mg/l). The results indicated that stress induced by tested cadmium decreased the content of photosynthetic pigments and selenium increased chlorophyll content. This decrease was significant in the 700 μM cadmium treatment. Overall, the results of this study indicate that selenium, especially sodium selenate at a concentration of 3 mg/L, has been able to reduce the toxic effects of cadmium on wheat (especially Pishtaz cultivar) and improve plant growth and development.

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References

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Volume 14, Issue 2
March 2023
Pages 123-133

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