Comparative efficacy of organic and inorganic silicon fertilizers on antioxidant response, Cd/Pb accumulation and health risk assessment in wheat (Triticum aestivum L.). (December 2019)

• Record Type: Journal Article
• Authors: Huang, Hengliang; Rizwan, Muhammad; Li, Mei; Song, Furu; Zhou, Sijiang; He, Xuan; Ding, Rui; Dai, Zhihua; Yuan, Yuan; Cao, Menghua; Xiong, Shuanglian; Tu, Shuxin
• Is Part Of: Environmental pollution. Volume 255(2019)Part 1
• Publication Date: 2019-12
• Subjects: Organosilicon -- Silicon -- Cd-Pb compound pollution -- Wheat -- Grey correlation analysis; Pollution -- Periodicals; Pollution -- Environmental aspects -- Periodicals; Environmental Pollution -- Periodicals; Pollution -- Périodiques; Pollution -- Aspect de l'environnement -- Périodiques; Pollution -- Effets physiologiques -- Périodiques; Pollution; Pollution -- Environmental aspects; Periodicals; Electronic journals; 363.73
• DOI: 10.1016/j.envpol.2019.113146
• Languages: English
• ISSNs: 0269-7491

Abstract

Abstract: In wheat production areas of China, soil lead (Pb) pollution is generally accompanied by cadmium (Cd) pollution and it is of considerable significance in repairing the Cd and Pb co-contaminated soils for safe agronomic production. Organosilicon fertilizer (OSiF) is a new type of silicon (Si) fertilizer that can effectively alleviate heavy metal toxicity in plants, but the mechanisms on its heavy metal detoxification are poorly understood. A soil pot experiment was conducted to evaluate and compare the effects of two OSiFs (OSiFA and OSiFB) and an inorganic silicon fertilizer (InOSiF) on wheat heavy metal uptake and biochemical parameters in a Cd and Pb co-contaminated soil. The results demonstrated that OSiFA, OSiFB and InOSiF could alleviate the Cd and Pb toxicity of wheat, as indicated by increasing wheat grain yield by 65%, 45% and 22%, respectively. The Si fertilizers enhanced leaf gas exchange attributes and chlorophyll content, whereas diminished the oxidative damage, as indicated by a lower level of hydrogen peroxide (H2 O2 ) and malondialdehyde (MDA) content, and lower activity of superoxide dismutase (SOD) and catalase (CAT) activity, as compared with control. Adding OSiFA, OSiFB and InOSiF increased Si uptake in roots and shoots, thus reducing Cd and Pb accumulation in the wheat shoot, bran and flour, especially, flour Cd contents by 17%, 10% and 31% respectively, flour Pb contents by 74%, 53% and 48% respectively. Also, Si fertilizers application decreased the health risk index (HRI) of both Cd and Pb. The grey correlation degrees of OSiFA, OSiFB and InOSiF are 0.72, 0.77 and 0.61, respectively, indicating that the effects of OSiFs on detoxifying Cd and Pb could be better than that of InOSiF in wheat. Thus, the use of OSiFs might be a feasible approach to reduce Cd and Pb entry into the human body through crops. Graphical abstract: Image 10717 Highlights: OSiFs increased growth and photosynthesis of Cd/Pb-stressed wheat. OSiFs reduced Cd and Pb contents and oxidative damage (MDA、H2 O2 contents) in wheat. OSiFs reduced human health risk concerns. Comparative efficacy of OSiFs and InOSiF was studied by grey correlation analysis. Abstract : Alleviation of cadmium and lead toxicity in wheat by organic and inorganic silicon fertilizers.