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Li Meiru, Du Yanru, Guo Libo. PLASMALEMMA ATPase OF HYPOCOTYL OF PEANUT SEEDLING AND ITS REACTION TO LOW TEMPERATUER STRESS[J]. Plant Science Journal, 1999, 17(2): 110-114.
Citation: Li Meiru, Du Yanru, Guo Libo. PLASMALEMMA ATPase OF HYPOCOTYL OF PEANUT SEEDLING AND ITS REACTION TO LOW TEMPERATUER STRESS[J]. Plant Science Journal, 1999, 17(2): 110-114.
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PLASMALEMMA ATPase OF HYPOCOTYL OF PEANUT SEEDLING AND ITS REACTION TO LOW TEMPERATUER STRESS

  • 1.

    South China Institute of Botany, The Chinese Academy of Sciences Guangzhou 510650

  • 2.

    Department of Biology, Harbin Normal University Harbin 150080

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  • Received Date: September 24, 1997
  • Revised Date: January 24, 1998
  • Published Date: April 23, 1999
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    • Abstract
  • Plasma membrane were obtained from 7-day old peanut seedling hypocotyl by 6%～12% Dextran T70 density gradient centrifugation,with high quality and purity.Plasmalemma ATPase acts normally as hydrolyzing ATP without Mg2+ in reaction system, but the activity was lower than Mg2+-activated ATPase.Ca2+-ATPase wasn't inhibited by Na3VO4 and wasn't activitied by K+,whereas it is inhibited by Cl-.The optimum pH of Ca2+-ATPase is different from that of Mg2+-activated ATPase.Plasma membrane Ca2+-ATPase activity increased notably under low temperature stress.It is suggest that the possible role of Ca2+-ATPase is adjusting Ca2+ concentration on cytoplasms.
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