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[1]LIU Peng,YIN Li-na,WANG Shi-wen,et al.The Effect and Mechanism of Silicon on Sorghum Seedlings Growth Under Cadmium Stress[J].Research of Soil and Water Conservation,2014,21(06):329-333.

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The Effect and Mechanism of Silicon on Sorghum Seedlings Growth Under Cadmium Stress

Research of Soil and Water Conservation[ISSN 1005-3409/CN 61-1272/P] Volume: 21 Number of periods: 2014 06 Page number: 329-333 Column: Public date: 2014-12-28

Title:: The Effect and Mechanism of Silicon on Sorghum Seedlings Growth Under Cadmium Stress

Author(s):: LIU Peng¹, YIN Li-na^1,2, WANG Shi-wen^1,2, DENG Xi-ping^1,2; 1. State Key Laboratory of Soil Erosion and Dryland Farming on the Loess Plateau, Institute of Soil and Water Conservation, Chinese Academy of Sciences and Ministry of Water Resources, Yangling, Shaanxi 712100, China;
2. Institute of Soil and Water Conservation, Northwest A & F University, Yangling, Shaanxi 712100, China

Keywords:: silicon; cadmium; anti-oxidant enzyme; organic acid

CLC:: Q945.78

DOI:: -

Abstract:: Although the effects of silicon on cadmium resistance are wildly reported, the underlying mechanism is still unclear. In the present study, we investigated the effect and mechanism of silicon on sorghum seedling growth under cadmium stress. The result indicated silicon application alleviated cadmium-induced decrease in fresh weight and dry weight both of shoot and root. The result indicated that the anti-oxidant enzyme activity was not affected by silicon under control condition. However under cadmium stress, the CAT and POD activity were significantly increased by silicon. The SOD activity was not influenced by silicon. Corresponding to this result, MDA was decreased by silicon. The result indicated that 3 types of organic acids (OA) including oxalic acid, propanedioic acid and succinic acid were detected in leaf. All of them were increased by silicon under cadmium stress. In the root, 4 types of OA such as oxalic acid, malic acid, propanedioic acid and citric acid were detected. Oxalic acid and propanedioic acid contents were increased by silicon. Citric Acid content was not influenced by silicon. However, the malic acid was decreased by silicon. All of the results indicated that the enhancement of anti-oxidant enzyme activity and OA content involved in the silicon-induced sorghum seedlings cadmium resistance.

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