Purpose

Wheat (Triticum aestivum L.) is a sensitive plant for both biotic and abiotic stresses and directly losses the production rate under these stresses. The beneficial role of silicon has been explored in the beginning of twentieth century. Therefore the current experiment was carried out to explore the effect of silicon on defense system of wheat by antioxidant enzymes assay.

Methods

In this study two wheat cultivars Umeed and Zarghoon, were grown in soil under salt stress of 100 mM NaCl. The treatments included C1 (Control), C2 (Control + salt), S1 (Na₂SiO₃) and S2 (Na₂SiO₃ + Salt). When the fag leaf appeared both the wheat cultivars were compared by estimating their antioxidants enzymes (superoxide dismutase, catalase and peroxidase) and soluble protein in different treatments.

Results

The soluble proteins and antioxidant enzymes in wheat decreased under salt stress of 100 mM NaCl. Whereas by silicon supplementation in salt stressed wheat plants, improvement in the protein quantity was observed. The application of silicon improved the defense mechanism of plant and increased the antioxidant enzymes which were suppressed by the salt stress. Umeed showed more improvement as compared to Zarghoon variety.

Conclusion

Overall it was concluded that silicon has helped the wheat plants to mitigate the salt stress by strengthening its defense mechanism which was apparent by superoxide dismutase, catalase and peroxidase activity.

中文翻译：

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硅对盐胁迫下小麦抗氧化酶的影响。

目的

小麦（Triticum aestivum L.）是一种对生物和非生物胁迫都敏感的植物，在这些胁迫下直接丧失了生产率。硅的有益作用已在20世纪初开始探索。因此，目前的实验是通过抗氧化酶法研究硅对小麦防御系统的影响。

方法

在这项研究中，两个小麦品种Umeed和Zarghoon在100 mM NaCl的盐胁迫下生长在土壤中。处理包括C1（对照），C2（对照+盐），S1（Na ₂ SiO ₃）和S2（Na ₂ SiO ₃  +盐）。当fag叶片出现时，通过估算不同处理下它们的抗氧化剂酶（超氧化物歧化酶，过氧化氢酶和过氧化物酶）和可溶性蛋白来比较两个小麦品种。

结果

在100 mM NaCl的盐胁迫下，小麦中的可溶性蛋白质和抗氧化酶降低。而通过在盐胁迫的小麦植物中添加硅，可以观察到蛋白质含量的提高。硅的施用改善了植物的防御机制，并增加了被盐胁迫抑制的抗氧化酶。与Zarghoon品种相比，Umeed表现出更大的进步。

结论

总的来说，可以得出结论，硅通过增强其防御机制（通过超氧化物歧化酶，过氧化氢酶和过氧化物酶活性而明显表现出来）帮助小麦植物缓解了盐胁迫。