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Effects of silicon on growth of cucumber seedlings under low temperature stress
WANG Hai-hong, ZHU Peng-fei, SHU Liang-zuo, ZHOU Xiu-jie
School of Life Sciences, Huaibei Normal University, Key laboratory of Plant Resources and Biology of Anhui Province, Huaibei, Anhui 235000, P. R. China
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Abstract  

Effects of silicon on growth of cucumber seedlings under low temperature stress were studied through sand culture experiment. The results showed that,compared to the cucumber seedlings grown without silicon addition under low temperature stress,the activities of superoxide dismutase(SOD),peroxidase(POD) in leaves and roots were significantly increased by silicon treatment.However,the content of malondialdehyde(MDA) and the producing rate of superoxide radical(O2-) in silicon-treated seedlings were markedly decreased as compared to the control.The relative plasma membrane permeability reduced in silicon-treated seedlings.The content of protein,chlorophyll,chlorophyll a/b ratio and fresh weight of maize seedlings were also increased by silicon addition under low temperature stress.Thus,the damage by low temperature stress on cucumber seedlings could be alleviated by silicon addition.

Key wordssilicon      low temperature stress      cucumber seedlings      membrane lipid peroxidation      protective enzymes     
Received: 25 February 2011     
:  Q945.78  
  S123  
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WANG Hai-hong
ZHU Peng-fei
SHU Liang-zuo
ZHOU Xiu-jie
Cite this article:   
WANG Hai-hong,ZHU Peng-fei,SHU Liang-zuo, et al. Effects of silicon on growth of cucumber seedlings under low temperature stress[J]. , 2011, 30(1): 38-42.
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http://www.ecolsci.com/EN/     OR     http://www.ecolsci.com/EN/Y2011/V30/I1/38
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