Journal
BIOLOGICAL TRACE ELEMENT RESEARCH
Volume 143, Issue 1, Pages 507-517Publisher
HUMANA PRESS INC
DOI: 10.1007/s12011-010-8859-y
Keywords
Enhanced UV-B; Silicon; Wheat; Malondialdehyde; The rate of superoxide radical production
Funding
- China Postdoctoral Science Foundation [20100470986]
- Key Laboratory of Ecological Agriculture of Ministry of Agriculture [2009k12]
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Enhanced ultraviolet-B (UV-B) irradiation is one of the most important abiotic stresses that could influence the growth and physiological traits of plants. In this work, we reported the effects of silicon on the growth and physiological characteristics of wheat seedlings (Triticum aestivum L. cv Hengmai5229) subject to UV-B stress. Treatments with silicon significantly increased total biomass and chlorophyll (a + b) content, and reduced malondialdehyde (MDA) content and the rate of superoxide radical (O (2) (-) ) production in wheat seedlings subjected to UV-B stress. Silicon treatments also induced an increased in soluble sugar, anthocyanins, and flavonoid content. Leaf silicon concentration increased with the increasing of silicon supply to soil. Positive correlations were found in leaf silicon concentration with total biomass, chlorophyll (a + b), proline, and soluble protein content, respectively. MDA content and the rate of O (2) (-) production were negatively correlated with leaf silicon concentration in seedlings. The results demonstrated that silicon alleviated the damage caused by UV-B on wheat seedlings to some extent by the increase in antioxidant compounds content and leaf silicon concentration.
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