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《东北农业大学学报(英文版)》 2008-02
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Changes of the Biomass and Acid Phosphatase Activity in Maize(Zea mays L.) Lines Under Low-P Stress

YAO Qilun Department of Life Science,Yangtze Normal University,Fuling 408100,Chongqing,China  
A pot culture trial was conducted to investigate the changes of the biomass and acid phosphatase(APase) activity in 10 maize lines under low-P stress.P-deficiency significantly decreased the biomass,but induced the significant enhancement of the APase activity.Since P-deficiency had smaller effects on the low-P tolerant maize lines compared with P-sensitive lines,it was demonstrated that differences of tolerance to P-deficiency existed among 10 different maize lines.In addition,the relative biomass and APase activity changed during the vegetative stage of development,and there existed a significant correlation between the biomass and APase activity under low-P stress.These results suggest that the biomass and APase activity can be regarded as indicative traits of maize lines for tolerance to low-P stress at seedling stage.
【Fund】: Scientific Research Project of Chongqing Educational Commission (KJ051301)
【CateGory Index】: S513
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