Plant Diversity ›› 2008, Vol. 30 ›› Issue (01): 95-98.

• Articles • Previous Articles     Next Articles

Effect of High Temperature on the Cell Membrane, Membrane Lipid, and Ascorbic Acid Metabolism in Rauwolfia( Rauvolfia vericillata, Apocynaceae)

TIAN Xue-Jun1 , LONG Yun-Hui2 , ZHANG De-Gang1 , HE Ying2   

  1. 1 Department of Biology , Honghe University , Mengzi 661100 , China ;
    2 Department of Chemistry , Honghe University , Mengzi 661100 , China
  • Received:2007-04-07 Online:2008-02-25 Published:2008-02-25
  • Contact: TIAN Xue-Jun

Abstract: To explore the mechanism of growth retardation under high temperature in Rauwolfia ( Rauvolfia vericillata), the effects of high temperature on membrane integrity, lipid peroxidation , and antioxidant ascorbic acid were examined by measuring the electric conductivity, membrane lipid peroxide malondialdehyde (MDA), and changes of ascorbic acid in Rauwolfia leaves. The results showed that exposure to high temperature (44℃ and 50℃) resulted in increases in electric conductivity and MDA, and decrease in levels of abscorbic acid. Heat acclimation, pretreatment at 37℃, however, maintains ascorbic acid at higher levels than that without heat acclimation , which may be helpful for Rauwolfia to resist heat stress.

Key words: Rauvolfia vericillata

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