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Effects of seed-soaking with La(NO3)3 on seed germination and seedling growth of rape under Cd stress.

WU Xue-feng1,2;JIN Song1,2;CHU Ling1;LIU Deng-yi1   

  1. 1Provincial Key Laboratory of Conservation and Exploitation of Biological Resources in Anhui, Anhui Normal University, Wuhu 241000, Anhui, China;2Biodiversity Research Center, College of Life Science, Anhui Normal University, Wuhu 241000, Anhui, China
  • Received:1900-01-01 Revised:1900-01-01 Online:2007-08-13 Published:2007-08-13

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Abstract: In a water culture experiment, this paper studied the effects of seed-soaking with La(NO3)3 on the seed germination and seedling growth of Brassica napus under Cd stress. The results showed that when the Cd concentration was lower than 10 mg·L-1, seed-soaking with 0-50 mg·L-1 of La(NO3)3 could enhance seed vigor, promote seedling growth,and increase lipase activity as well as the cell mitosis index of seedling root. The optimal concentration of La(NO3)3 was 10 mg·L-1, under which, lipase activity increased by 40.41%-65.09% and cell mitosis index increased by 62.76%-77.02%,compared with the control. When the Cd concentration was higher than 10 mg·L-1, seed-soaking with La(NO3)3 had an obviously weakened alleviation effect on Cd stress, i. e. , only lipase activity increased significantly, while other indices had little variation.

Key words: Sapium sebiferum, Endophytic fungus, Mycelium growth, Fatty acid composition, Environmental factors